GENERAC XVT076A03 PWRcell Inverter Owner’s Manual

GENERAC XVT076A03 PWRcell Inverter

Product Information: Generac PWRcell Inverter

The Generac PWRcell Inverter is a power inverter designed for use in non- critical life support applications. The product has a model number and serial number that can be found on the unit data label. The inverter has an inverter control panel that includes REbus status LED, inverter status LED, and internet status LED. The inverter also has a shutdown mode. The product comes with an installation and owner’s manual that provides important safety rules, general information, specifications, location and compliance guidelines, and electrical connection instructions.

Product Usage Instructions: Generac PWRcell Inverter

Before using the Generac PWRcell Inverter, it is important to read the installation and owner’s manual thoroughly and follow the safety rules provided in the manual. When contacting an Independent
Authorized Service Dealer (IASD) or Generac Customer Service, always supply the complete model number and serial number of the unit.

Location and Compliance
The Generac PWRcell Inverter should be installed in a safe location that complies with local regulations and codes. It is important to follow the photovoltaic rapid shutdown guidelines provided in the manual. The PVRSS initiation and self-test procedures should also be followed.

Electrical Connections

Accessing the wiring compartment of the PWRcell Inverter should be done with caution. The wiring guidelines provided in the manual should be followed carefully. The grounding bar wiring and DC wiring should be done according to the instructions provided in the manual. For PV only installations without a PWRcell Battery, follow the instructions provided in the manual. For installations with a PWRcell Battery, follow the instructions provided in the manual.

Installation and Owner’s Manual

Generac PWRcell® Inverters XVT076A03 XVT114G03

009954

WARNING

Loss of life. This product is not intended to

be used in a critical life support application.

Failure to adhere to this warning could result

in death or serious injury.

(000209b)

Register your Generac product at: https://pwrfleet.generac.com
1-888-GENERAC Register (y8o8u8r-G43e6n-e3r7a2c2p)roduct at:
WWW.GENERAC.COM Para español, visita: http://www.generac.com/se1r- v8i8c8e–GsEuNpEpRoArtC/product-support-lookup Pour le français, visiter: http://www.generac.com(1/s-8e8r8v-i4c3e6-s-3u7p2p2)ort/product-support-lookup
SAVE THIS MANUAL FOR FUTURE REFERENCE

Use this page to record important information about your Generac Product
Record the information found on your unit data label on this page. See Serial Number Location. When contacting an Independent Authorized Service Dealer (IASD) or Generac Customer Service, always supply the complete model number and serial number of the unit.
Table 1: PWRcell Inverter Important Information Unit Model Number
Unit Serial Number
Date Purchased
Commissioning Date

WARNING
CANCER AND REPRODUCTIVE HARM www.P65Warnings.ca.gov.
(000393a)

ii

Installation and Owner’s Manual for Generac PWRcell Inverter

Installation Manual for Generac PWRmanager 12 Relay Load Controller

Safety Rules & General Information
Section 1: Safety Rules & General Information

Introduction
Thank you for purchasing a Generac PWRcell® product. The Generac PWRcell Inverter is a storage-ready inverter that connects to the PV LinkTM optimizers and PWRcell Batteries to form the Generac PWRcell system.
This manual provides instructions for installing the PWRcell Inverter, including mounting, wiring, and battery integration information.
The information in this manual is accurate based on products produced at the time of publication. The manufacturer reserves the right to make technical updates, corrections, and product revisions at any time without notice.
Read This Manual Thoroughly
WARNING
Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result in death or serious injury. (000100a)
If any section of this manual is not understood, contact the nearest Independent Authorized Service Dealer (IASD) or Generac Customer Service at 1-888-436-3722 (1-888-GENERAC), or visit www.generac.com for assistance. The owner is responsible for correct maintenance and safe use of the unit.
This manual must be used in conjunction with all other supporting product documentation supplied with the product.
SAVE THESE INSTRUCTIONS for future reference. This manual contains important instructions that must be followed during placement, operation, and maintenance of the unit and its components. Always supply this manual to any individual that will use this unit, and instruct them on how to correctly start, operate, and stop the unit in case of emergency.
Installation and commissioning of a PWRcell system should be performed after obtaining the necessary approvals and permitting from local authorities and utility.
Safety Rules
The manufacturer cannot anticipate every possible circumstance that might involve a hazard. The alerts in this manual, and on tags and decals affixed to the unit, are not all inclusive. If using a procedure, work method, or operating technique that the manufacturer does not specifically recommend, verify that it is safe for others and does not render the equipment unsafe.
Throughout this publication, and on tags and decals

affixed to the unit, DANGER, WARNING, CAUTION, and NOTE blocks are used to alert personnel to special instructions about a particular operation that may be hazardous if performed incorrectly or carelessly. Observe them carefully. Alert definitions are as follows:
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
(000001)
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
(000002)
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
(000003)
NOTE: Notes contain additional information important to a procedure and will be found within the regular text of this manual. These safety alerts cannot eliminate the hazards that they indicate. Common sense and strict compliance with the special instructions while performing the action or service are essential to preventing accidents.
How to Obtain Service For assistance, contact the nearest Independent Authorized Service Dealer (IASD) or Generac Customer Service at 1-888-436-3722 (1-888-GENERAC), or visit www.generac.com. When contacting an IASD or Generac Customer Service, always supply the complete model and serial number of the unit as given on its data decal located on the unit. Record the model and serial numbers in the spaces provided on the front cover of this manual.

Installation and Owner’s Manual for Generac PWRCell Inverter

1

Safety Rules & General Information

General Hazards
DANGER
Electrocution. Do not wear jewelry while working on this equipment. Doing so will result in death or serious injury.
(000188)

CAUTION

Equipment damage. Connect only to REbus-compatible

devices to the DC bus. Never connect to any other DC

power source. Connecting to other DC power sources

could result in equipment damage.

(000598a)

DANGER
Automatic start-up. Disconnect utility power and render unit inoperable before working on unit. Failure to do so will result in death or serious injury.
(000191)

WARNING
Electrocution. Potentially lethal voltages are generated by this equipment. Render the equipment safe before attempting repairs or maintenance. Failure to do so could result in death or serious injury.
(000187)

WARNING

Risk of injury. Do not operate or service this machine

if not fully alert. Fatigue can impair the ability to

operate or service this equipment and could result in

death or serious injury.

(000215a)

WARNING

Loss of life. This product is not intended to

be used in a critical life support application.

Failure to adhere to this warning could result

in death or serious injury.

(000209b)

WARNING

Equipment damage. Connecting inverter to electric utility

grid must only be done after receiving prior approval

from utility company. Failure to do so could result in

equipment or property damage.

(000640)

WARNING
Electric shock. Only a trained and licensed electrician should perform wiring and connections to unit. Failure to follow proper installation requirements could result in death, serious injury, and equipment or property damage.
(000155a)

WARNING
Equipment damage. Only qualified service personnel may install, operate, and maintain this equipment. Failure to follow proper installation requirements could result in death, serious injury, and equipment or property damage.
(000182a)

· PWRcell system is required to be connected to a utility grid. Connecting the PWRcell Inverter to the electric utility grid must only be done after receiving prior approval from the utility company.
· Generac does not currently support autonomous, off grid installations with PWRcell equipment. If this installation is in Canada, the installation shall be in accordance with the Canadian Electrical Code, Part I.
· Only competent, qualified personnel should install, operate, and service this equipment. Strictly comply to local, state, and national electrical and building codes. When using this equipment, comply with regulations established by the National Electrical Code (NEC), CSA Standard, and the Occupational Safety and Health Administration (OSHA), or the local agency for workplace health and safety.
· Protection against lightning surges in accordance with local electric codes is the responsibility of the installer.
NOTE: Lightning damage is not covered by warranty.
· Never work on this equipment while physically or mentally fatigued.
· Any voltage measurements should be performed with a meter that meets UL3111 safety standards, and meets or exceeds overvoltage class CAT III.
WARNING – This photovoltaic rapid shutdown equipment (PVRSE) does not perform all of the functions of a complete photovoltaic rapid shutdown system (PVRSS). This PVRSE must be installed with other equipment to form a complete PVRSS that meets the requirements of NEC (NFPA 70) section 690.12 for controlled conductors outside the array. Other equipment installed in or on this photovoltaic (PV) system may adversely affect the operation of the PVRSS. It is the responsibility of the installer to ensure that the completed PV system meets the rapid shutdown functional requirements. This equipment must be installed according to the manufacturer’s installation instructions.
Follow all instructions included in this manual and use appropriate practices for all product wiring and installation.

2

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Hazards
DANGER
Electrocution. Water contact with a power source, if not avoided, will result in death or serious injury.
(000104)

DANGER
Electrocution. PWRcell Battery front cover should be removed by a qualified technician only. Removing the front cover could result in death, serious injury, equipment or property damage.
(000604)

DANGER

Electrocution. In the event of electrical accident,

immediately shut power OFF. Use non-conductive

implements to free victim from live conductor. Apply

first aid and get medical help. Failure to do so will

result in death or serious injury.

(000145)

DANGER

Electrocution. Turn battery disconnect OFF and

de-energize REbus before touching terminals.

Failure to do so will result in death, serious injury,

equipment and property damage.

(000599)

DANGER

Electrocution. Verify electrical system is

properly grounded before applying power.

Failure to do so will result in death or serious

injury.

(000152)

Safety Rules & General Information

Installation and Owner’s Manual for Generac PWRCell Inverter

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Safety Rules & General Information
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Installation and Owner’s Manual for Generac PWRCell Inverter

Section 2: General Information

General Information

Specifications
Description Max. cont. grid-tied AC power @ 122°F (50ºC) Max. cont. AC power in island mode without an external transfer switch1 Max. cont. AC power in island mode w/ external transfer switch and single 6 module battery cabinet2 Max. cont. AC power in island mode w/ external transfer switch and 2 battery cabinets (8 modules minimum)2 Peak motor starting current (2 sec) Normal output frequency AC Grid Voltage Line to Neutral (L-N) Grid Voltage Line to Line (L-L) Peak efficiency Optimal split phase imbalance for max. system performance Maximum Current Unbalance CEC weighted efficiency AC terminals wire size DC terminals wire size STOP terminals wire size Weight Thermal management Weatherization rating Enclosure Material

Units kW
kW
kW
kW
A rms Hz VAC VAC % % % %
AWG AWG AWG lb (kg)
­ ­ ­

XVT076A03 7.6 7.6

XVT114G03 11.4 7.6*

9.0

—

11.0

—

50

60

120

240

208

97.3

97.7

30

—

0.14

97.0

97.0

8 to 6

10 to 6

20 to 14

70.9 (32.1)

forced convection

NEMA Type 3R

powder-coated steel

Description REbus voltage REbus current
REbus input short circuit current3 Max input circuit backfeed current (fault condition) Output power factor rating AC (25%, 50%, 100% of rated power) Operating voltage range AC, XVT076A03 / (L-N) Operating voltage range AC, XVT076A03 / (L-L)
Operating voltage range AC, XVT114G03 / (L-N) Operating output voltage range AC, XVT114G03 / (L-L) Continuous output current AC grid-tied Output controlled current grid-tied Continuous output current AC islanded1 Synchronization Inrush Current Output fault current duration Protected Loads output overcurrent protection Full Power operating ambient temperature range4 Utility interconnection voltage and frequency trip limits and trip times
Trip voltage and frequency limits
Trip voltage accuracy

Units V dc A dc
A dc A dc
V rms V rms V rms V rms A rms A rms A rms A rms/p-p A / ms
A °F (°C)

Min 360
0.96 106 212 106 184
0
-4 (-20)

Nominal 380
0.98 120 240 120 208
50 / 2,000

Max 420 30 30
0 0.99 132 264 132 228 32 32 45 32.1 / 94.83
50 +122 (+50)

See Voltage and Frequency Trip Thresholds for more information.

Trip time accuracy

%

2% +/- 2 cycles

1 In Island Mode, continuous current output is restricted to 32 A unless backup power is routed through an external transfer switch.

2 Peak performance, values provided for 104º F (40º C)

3 Rating for one DC input. Four total.

4 Includes ambient temperature rising from inverter operation.

• In Island Mode, XVT114G03 produces 2 phases of 120 VAC L-N and 208 VAC L-L which results in lower power than when operating grid-tied.

Inverter limits its REbus current to adhere to its AC power rating. Total REbus current capability from multiple REbus sources may safely exceed this value as the inverter safely limits the amount utilized.

Installation and Owner’s Manual for Generac PWRcell Inverter

5

General Information

Serial Number Location

Component Locations

Refer to Figure 2-2 to locate unit serial number (D).

Record the information from this tag in Table 1: PWRcell

Inverter Important Information on the inside front cover

of this manual.

Unit Dimensions

A

C

A D
B

B
Figure 2-1. Unit Dimension A 24-3/4 in (628 mm) B 19-3/8 in (491 mm) C 8-3/8 in (214 mm)

C 009955

009654
Figure 2-2. Component Locations
A Control Panel B Intake Filter C Exhaust Vent D Serial Number Tag

About PWRcell Inverters
The PWRcell Inverter connects PV LinkTM optimizers and PWRcell Batteries to form the PWRcell system for gridinteractive solar-plus-storage. Upon the loss of utility grid power, PWRcell Inverters disconnect from the grid and provide AC power to support protected loads when configured to do so. This capability is referred to as islanding. For more information, see Island Mode in Section 6:Commissioning.

PWRcell Inverters use the REbusTM 380 VDC nanogrid to connect DC-coupled PWRcell devices. The REbus nanogrid automates the flow of power to enable plug-and-play setup and operation of PWRcell equipment. For more information about REbus, visit www.generac.com. In Figure 2-3 PWRcell Inverter (E) is directly connected to PV Link optimizers (B) and PWRcell Battery (C) on DC (REbus) lines (D). To the right of the inverter are AC lines: 120/240 VAC or 208 VAC for grid and home loads (G) and protected loads (H).
.

C

F

G

E

A

B

B

B

D D

A Solar Panels B PV Link C PWRcell Battery

Figure 2-3. Generac PWRcell System Example

D REbus E PWRcell Inverter F Grid

G Loads H Protected Loads

H 009893

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Installation and Owner’s Manual for Generac PWRcell Inverter

General Information

Inverter Control Panel

A C
D

REbus
B

Inverter

G

F

Internet

Shutdown

E

(hold)

H

Figure 2-4. Inverter Control Panel

009894

A LCD Display B Navigation Keys C REbus Status LED D Inverter LED

E Shutdown Button F Shutdown LED G Internet LED H Select

See Figure 2-4. The PWRcell system is controlled through the PWRcell Inverter control panel. The inverter control panel is used for adjusting system settings and for interacting with devices.

REbus Status LED
REbus Status LED (C) communicates REbus nanogrid status through LED color.

LED Color Green Yellow Red

REbus Status
All devices are enabled and functioning normally on REbus.
One or more devices are disabled, or no devices are detected.
A serious fault has been detected on a device or the REbus wiring.

Inverter Status LED
Inverter LED (D) communicates the status of the utility grid and / or inverter through LED color and state.

LED Color Green Green Blinking Yellow Yellow Blinking
Red No Light

Inverter Status
Utility is connected and within normal operational voltage and frequency.
Inverter is in Island Mode due to a utility service interruption. Utility is not within normal operational voltage and frequency.
Inverter is disabled or powering up.
Inverter is waiting to connect to the grid, in the process of connecting to REbus, or waiting to connect to REbus.
Inverter is overloaded, or a serious fault has been detected on the inverter. Manual intervention is likely required before the equipment will resume operation.
Inverter is powered down.

Internet Status LED
Internet LED (G) is illuminated when the inverter has a connection to the Generac server. Internet LED (G) will slowly strobe when REbus Beacon is updating its firmware.

LED Color Blue
Blue Strobing
No Light

Internet Status
Internet connected
Internet connected and Beacon firmware auto-update is in progress. Note: Do not power off the inverter or unplug REbus Beacon while update is in progress.
Not internet connected.

Shutdown Mode

DANGER

Electrocution. Initiate a system-wide shutdown and turn the

PWRcell DC Disconnect Switch OFF on all connected

batteries before performing service. Failure to do so will

result in death, serious injury, or equipment and property

damage.

(000600)

NOTE: A loss of grid power will not de-energize REbus in a PWRcell system configured to enter Island Mode with enabled energy storage.
Shutdown button (E) activates a transition to shutdown mode.
Disabled PWRcell equipment limits output voltages to a safe level for servicing.
After pressing the Shutdown button and entering Shutdown Mode, the AC section of the inverter will still be powered, unless there is an active utility service interruption, or the AC solar backfeed breaker, AC solar disconnect, building AC disconnect, or main service breaker is shut off.
To enter shutdown, press and hold shutdown button (E).
In shutdown mode:
· The PWRcell Inverter will stop sourcing power to REbus, and immediately disable all communicating power sources on REbus by sending a systemwide system mode change signal.
NOTE: Successful signal transmission relies upon proper configuration of PLM channels across REbus devices (PV Links and Batteries).
· Shutdown LED (F) will illuminate. · Inverter screen (A) will display REbus DC bus volt-
age and text indicting Shutdown mode has been initiated.
To exit shutdown, follow the prompts provided on the LCD screen.

Installation and Owner’s Manual for Generac PWRcell Inverter

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General Information
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Installation and Owner’s Manual for Generac PWRcell Inverter

Location and Compliance

Section 3: Location and Compliance

Location
When installing the PWRcell Inverter, consider the following:
· The inverter installation location must meet the working space requirements in NEC Article 110.26.
· The unit can be installed in indoor or outdoor locations.
· If installing indoors, an external switch must be installed to be the PV rapid shutdown initiator, or additional DC disconnects must be sourced and installed on the PV circuits. See Photovoltaic Rapid Shutdown for more information.
· If installing outdoors, mount the unit near the utility service entrance to allow the inverter DC disconnects to be the compliant PV rapid shutdown initiators. See Photovoltaic Rapid Shutdown for more information.
· If using the inverter DC disconnects as the compliant PV rapid shutdown initiator(s), verify the height of the DC disconnects in the inverter do not exceed 6′ 7″ (2 m) to comply with NEC Article 404.8(A).
· Ensure proper labeling of PV equipment and add placards where necessary to indicate location of PV disconnects.
· If possible, avoid mounting locations where the inverter may be subject to direct sunlight or where liquids may be prone to drip/collect.

Note on DC Wiring and the NEC

Some electricians or installers may be unfamiliar with DC wiring in a residential setting. Note the following:
· NEC 690.31 for DC PV circuits in buildings
· NEC 215.12(C)(2) for correct DC wiring identification
Always adhere to applicable codes when marking and installing DC conductors. See Table 3-1: REbus DC Wiring Coloring Convention. Mark or flag all conductors for their polarity as appropriate.

Table 3-1. REbus DC Wiring Coloring Convention

Wire REbus + (RE+) REbus – (RE-) Ground (GND)

Color Red Black Green

· It is recommended that REbus (+) conductors NOT be green, white, gray, blue, or black.
· It is recommended REbus (-) conductors NOT be green, white, gray, or red.

Compliance

DANGER

Loss of life. Property damage. Installation must

always comply with applicable codes, standards, laws

and regulations. Failure to do so will result in death

or serious injury.

(000190)

WARNING
Electrocution. Refer to local codes and standards for safety equipment required when working with a live electrical system. Failure to use required safety equipment could result in death or serious injury.
(000257)

WARNING
Equipment damage. Only qualified service personnel may install, operate, and maintain this equipment. Failure to follow proper installation requirements could result in death, serious injury, and equipment or property damage.
(000182a)

Installation and Owner’s Manual for Generac PWRcell Inverter

9

Location and Compliance

Photovoltaic Rapid Shutdown
The PV Link, SnapRS, and PWRcell Inverter are certified as Photovoltaic Rapid Shutdown Equipment (PVRSE). Review Table 3-2: PVRSS Requirements and PWRcell PVRSE to determine what PWRcell equipment is required to constitute an effective Photovoltaic Rapid Shutdown System (PVRSS). Refer to Generac PV Link & SnapRS Installation manual for more information on proper installation of those devices including commissioning instructions.

Table 3-2. PVRSS Requirements and PWRcell PVRSE

NEC Adoption

PVRSS Requirements (NEC 690.12)

Required PWRcell PVRSE*

2011 or older

No PVRSS requirements.

N/A

2014

Controlled conductors leaving array limited to not more than 30 volts within 10 seconds of rapid shutdown initiation.

Generac PV Link(s)

2017, 2020 and follows

Controlled conductors leaving array limited to not more than 30 volts within 30 seconds of rapid shutdown initiation. Controlled conductors located inside the array boundary (or not more than 1 m (3ft) from the point of penetration of the surface of the building) shall be limited to not more than 80 volts within 30 seconds of rapid shutdown initiation.

Generac PV Link(s), Generac SnapRS
(one per PV module)

*Depending on approved method used, the PVRSS may include the Generac PWRcell Inverter but the inverter is not required for an effective PVRSS.

Following PV rapid shutdown initiation, controlled conductors will be brought within the limits defined in NEC 690.12 as described in Table 3-2 above. The controlled conductors include:
· REbus conductors connecting PV Link(s) to the PWRcell Inverter (conductors leaving the array). · PV conductors between modules in PV Link PV substring (conductors inside the array boundary).
NOTE: AC conductors exiting and entering the inverter are not considered controlled conductors for this application.
NOTE: Depending on the installation conditions (panel type, ambient temperature, etc.), leakage current methods detailed in UL 1703, Section 21 may be used to indicate compliance with the stated limits as permitted by UL 1741, Section 93.1.2.
PVRSS Initiation
There are three approved methods for initiating PV rapid shutdown with PWRcell equipment. Each method effectively disconnects the PV input circuits from the inverter’s internal DC bus. This disconnection is detected by the PV Links, which in turn interrupt the PV source circuits. Interruption of the PV source circuits opens SnapRS devices, isolating PV modules within the array. All three methods are considered suitable for installations where the inverter is located outside of a one-family or two-family dwelling. In most situations, only Method 2 (external switch) or Method 3 (installersourced DC disconnect) will be appropriate for installations where the Inverter is located inside of a one-family or twofamily dwelling (where the external device is located outside of the dwelling near the utility service entrance). Appropriate signage and/or markings in compliance with NEC 690 must be provided by the installer.
Method 1 – PVRSS initiation via PWRcell Inverter DC disconnect(s) (outdoor installations) 1. Open the inverter lid.
2. Locate the PWRcell DC disconnects located to the left of the Generac Power Core.
3. Turn DC disconnects connected to PV sources to the OFF position.
Method 2 – PVRSS initiation via external switch connected to inverter STOP terminals (indoor and outdoor installations)
NOTE: If installation includes a PWRcell Battery, the battery must be equipped with external STOP terminals. Battery STOP terminals must be wired in series or parallel to the inverter STOP terminals. See PWRcell Battery Installation & Owner’s Manual for more details.
1. A UL listed, 12 VDC, 1 A, lockable, weatherproof switch must be connected to the STOP terminals to use this method.

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Installation and Owner’s Manual for Generac PWRcell Inverter

Location and Compliance
a. The switch must indicate ON and OFF positions, where the OFF position opens the STOP terminal circuit. STOP circuit terminals are normally closed.
2. Turn switch to the OFF position. 3. Upon initiation, the inverter display will read “Shutdown Initiated”. See Section 5: Electrical Connections STOP Terminal Wiring for installation instructions. Method 3 – PVRSS initiation via installer-sourced DC disconnect(s) (indoor and outdoor installations) 1. A UL listed, lockable, weatherproof DC disconnect rated for at least 420 VDC and 30 A must be installed
between the PV conductors leaving the junction box and the inverter DC inputs. a. The switch must indicate ON and OFF positions, where the OFF position opens the PV circuit. 2. Turn DC disconnects to the OFF position.
NOTE: This equipment shall be installed and operated in an environment within the ratings and limitations of the equipment as published in these installation instructions.
PVRSS Self-Test After commissioning, a PVRSS self-test can be performed to validate the functionality of the PVRSS using one of the methods described above. Alternatively, functionality of the PVRSS can be validated for a substring using the following instructions.
1. On the PWRcell Inverter control panel, press the right arrow key until the first PV Link device page appears.
NOTE: The device page display should read Disabled. If it does not read Disabled, press the center button and disable the PV Link.
2. Press the center button and select “Test PVRSS” to enter the Testing PVRSS’ state. The display indicatesTesting PVRSS’ during the test process, which can take up to three minutes. Upon successful completion, the display will read `Test Success’.

Installation and Owner’s Manual for Generac PWRcell Inverter

11

Location and Compliance

Voltage and Frequency Trip Thresholds
This unit or system is provided with fixed trip limits and shall not be aggregated above 30 kW on a single point of common coupling. All PWRcell Inverters are shipped from the factory in compliance with all UL 1741 requirements, including IEEE 1547. If permission to operate (PTO) is dependent on compliance to a specific utility standard, follow the steps covered in the Set Inverter Grid Compliance (optional) section in this manual.
Voltage Trip Thresholds See Table 3-3 for the default fixed voltage trip setpoints. All over voltage and under voltage trip conditions result in a 300-second restart delay time after the trip threshold has been exceeded for the listed number of cycles. The inverter is disconnected from the grid during this 300-second delay.
Frequency Trip Thresholds See Table 3-3 for the default fixed frequency trip setpoints. All over frequency and under frequency trip conditions result in a 300-second restart delay time after the trip threshold has been exceeded for the listed number of cycles. The inverter is disconnected from the grid during this 300-second delay.
Table 3-3. Voltage Trip and Frequency Thresholds

Voltage Trip Thresholds

Frequency Trip Thresholds

Threshold

Threshold (% of nominal)

No. of Cycles

OV4

999*

1

OV3

130

1

OV2

120

10

OV1

110

60

UV1

88

120

UV2

50

10

UV3

999*

1

UV4

999*

1

*Value of 999 indicates a disabled threshold for voltage trips. **Value of zero indicates a disabled threshold for frequency trips.

Threshold
OF4 OF3 OF2 OF1 UF1 UF2 UF3 UF4

Threshold (% of nominal)
0 0 0 0.5 0.7 0 0 0

No. of Cycles
1 1 1 10 10 1 1 1

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Installation and Owner’s Manual for Generac PWRcell Inverter

Installing PWRcell Inverter
Section 4: Installing PWRcell Inverter

Mounting Clearances

4 in (10.16 cm)

19-1/4 in (48.9 cm)

8 in (20.32 cm )

8 in (20.32 cm)

20 in (50.8 cm)

8-1/2 in (21.6 cm)

24-1/2 in (62.23 cm)

8 in (20.32 cm)

28-1/2 in (72.4 cm)

28 in (71.15 cm)

36 in (91.44 cm)

Figure 4-1. PWRcell Inverter Dimensions and Mounting Clearances

Mounting Bracket Dimensions

1-1/2 in (3.81 cm)

010508

2-3/8 in (6.03 cm)

16 in (40.64 cm)
Figure 4-2. Mounting Bracket Dimensions

009990

Installation and Owner’s Manual for Generac PWRcell Inverter

13

Installing PWRcell Inverter

Mounting the Inverter
CAUTION
Equipment damage. Mount inverter to a strong, stable surface. Never mount to drywall, plaster, or other non-structural wall treatments. Failure to mount inverter to a strong, stable surface could result in equipment or property damage.
(000641a)
1. Verify mounting location adheres to the following requirements:
· Location must meet all PWRcell Inverter requirements listed in Section 3 of this manual. See Location and Compliance for more information.
· Inverter must be mounted upright on a vertical wall. · Never obstruct intake or exhaust vents. · Never allow water to enter intake or exhaust vents. · Observe all mounting clearances. See Mounting
Clearances.
2. Secure mounting bracket mounting surface through mounting holes.
· Fasteners must adequately secure the 62.7 lbs (28.4 kg) inverter weight to the wall.
· Fasteners must be suitable for the mounting surface.
· Fasteners must engage at least two studs or other structural members.
· Mounting bracket has clearance holes for 1/4 in fasteners with slots to accommodate different stud spacings.
3. See Figure 4-3. Insert mounting bracket tabs (A) into inverter body slot (B).

NOTE: Figure 4-3 is for illustration purposes only.
B
A
009991
Figure 4-3. Mounting Inverter onto Bracket 4. See Figure 4-4. Secure the bottom of the inverter
to wall with two fasteners through mounting holes (C). Holes are spaced at 11 1/4 in. from each other. Use anchors or blocking as needed.

C

Figure 4-4. Mounting Holes

009992

14

Installation and Owner’s Manual for Generac PWRcell Inverter

Section 5: Electrical Connections

Electrical Connections

Accessing Wiring Compartment

DANGER

Electrocution. Initiate a system-wide shutdown and turn the

PWRcell DC Disconnect Switch OFF on all connected

batteries before performing service. Failure to do so will

result in death, serious injury, or equipment and property

damage.

(000600)

DANGER

Electrocution. Verify all system voltages are safe before

wiring. Disconnect all AC and DC sources of power before

touching terminals. Failure to ensure no dangerous

voltages are present on conductors and terminals before

wiring will result in death or serious injury.

(000642)

IMPORTANT: The inverter interior is not weather-proof. Do not open the inverter front cover when wet or during rain/snowfall.
See Figure 5-1. To access the wiring compartment:
1. Open inverter front cover by lifting the bottom to just beyond horizontal (B) and pushing inward (C).

PWRcell Inverter Wiring Compartment
A

2. Locate wiring compartment cover (D).
3. Remove five M4X10 screws (E) and wiring compartment cover.
4. Verify all PWRcell DC and AC terminals are below 10 V, using a multi- meter.

C

B

A

E

D

Figure 5-1. Wiring Compartment

010238

D

E

F

H

N

J

G

I

B

C

M

O

K

L

Figure 5-2. PWRcell Inverter Wiring Compartment

A PWRcell DC Disconnects B REbus Bi-directional DC Terminals C Internet Connection D DC Main Fuses E Current Transformers (CTs) Accessory Ports F Automatic Transfer Switch (ATS) Accessory Port G REbus Beacon Port H Authorized Generac Personnel Only

I STOP Terminals J Protected Loads Disconnect K AC Grid Connection Terminals L Protected Loads Terminals M Grounding Bar N RGM PWR / Gen Inhibit O Fast Blow Mini Fuses 1 A 250 V

Installation and Owner’s Manual for Generac PWRCell Inverter

011235
15

Electrical Connections
Knockout Dimensions and Locations
NOTE: All knockouts are combination knockouts, except for the 1/4 in trade knockout at the top of the left side which is intended only for mounting an optional LTE modem antenna.
See Figure 5-3 for knockout locations and Table 5-4 for available knockout sizes and quantities. When using knockouts:
· Install reducing washers to accommodate smaller conduit sizes.

· Install rain-tight or wet locations hubs in compliance with UL514B.
Table 5-4. Combination Knockout Size and Quantity

Combination Knockout Size 3/4 in X 1 in 1/2 in X 3/4 in
0.575 in use only for LTE Modem Antenna

Quantity 6 7 1

1-19/32 in 40 mm

3-13/16 in 97 mm
5-17/32 in 140 mm

1-31/32 in 50 mm

2-7/32 in 56 mm

1-21/32 in 42 mm

5-13/32 in 137 mm

2-13/16 in 72 mm

2-9/32 in 58 mm

1-31/32 in 50 mm
13/32 in 10 mm

2-5/32 in 55 mm
2-7/16 in 62 mm

2-5/32 in 55 mm

2-5/32 in 55 mm
1-3/8 in 35 mm

1-31/32 in 50 mm

1-3/4 in 45 mm

1 in 26 mm

1-3/32 in 28 mm
2-5/32 in 55 mm

1-7/8 in 48 mm

Figure 5-3. Knockout Locations

21-23/32 in 552 mm
011234

16

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections

Wiring Guidelines

DANGER

Electrocution. Verify all system voltages are safe before

wiring. Disconnect all AC and DC sources of power before

touching terminals. Failure to ensure no dangerous

voltages are present on conductors and terminals before

wiring will result in death or serious injury.

(000642)

DANGER

Electrocution. Turn battery disconnect OFF and

de-energize REbus before touching terminals.

Failure to do so will result in death, serious injury,

equipment and property damage.

(000599)

· The inverter shall be installed in accordance with NEC Article 705.
· All conductors must be rated for at least 420 V.
· Always use wiring methods in accordance with National Electrical Code (ANSI/NFPA 70) or other applicable codes.
· Field terminals are for copper conductors only.
· All field installed conductors within the unit are to be sized in compliance with NEC Article 310.
· Torque all terminals as specified in this section.

Grounding Bar Wiring

CAUTION

Equipment damage. Never connect REbus conductors to ground. Connecting REbus conductors to ground could result in equipment or property damage.
(000607a)

· Bond the inverter enclosure to the equipment grounding conductor of the normal power source power feeder.
· The grounding bar provides central grounding for up to 8 conductors.
· AC output circuits are isolated from the enclosure.
· AC system grounding, when required by Canadian Electrical Code, Part I, is to be done in the installation.
· The neutral conductor is not bonded to the equipment ground terminal bar within the enclosure.
· The inverter and its connected PV and battery sources are not separately derived systems.
· DC system grounding is critical for REbus communications. Ensure the following REbus devices have a low resistance wired connection back to the inverter grounding terminal bar:
­ PV Link
­ PWRcell Batteries
· Torque all terminals as specified in Table 5-5.

Table 5-5. Grounding Bar Wiring Terminal Specifications

Wire Size (AWG) 4 ­ 6 8 10

Torque 45 in-lb (5 Nm) 40 in-lb (4.5 Nm) 30 in-lb (4 Nm)

Installation and Owner’s Manual for Generac PWRCell Inverter

17

Electrical Connections

DC Wiring
DANGER
Electrocution. Never touch terminals when inverter and PWRcell DC disconnects are ON. Doing so will result in death or serious injury.
(000686a)

WARNING
Equipment damage. Obey polarity markings when connecting REbus devices. Reverse-polarizing DC circuits could result in equipment or property damage.
(000646)

WARNING
Equipment damage. Do not connect raw, unregulated battery output to inverter. Connect only REbus-compatible batteries. Connecting batteries that are not REbuscompatible could result in equipment or property damage.
(000645)
CAUTION
Equipment damage. Do not connect PV string output directly to inverter. PV must be connected via Generac PWRcell PV Link. Connecting PV output directly to inverter could result in equipment or property damage.
(000644a)

CAUTION
Equipment damage. Connect only one wire to each DC wiring terminal. Doubling wires on a terminal could result in equipment or property damage.
(000647a)

CAUTION

Equipment damage. Connect only to REbus-compatible

devices to the DC bus. Never connect to any other DC

power source. Connecting to other DC power sources

could result in equipment damage.

(000598a)

NOTE: The inverter does not itself provide ground fault detection and interruption for PV circuits. PV GFDI is provided by Generac PV Links in a PWRcell system.
· Connect all REbus devices to the REbus bidirectional DC terminals.
· Each terminal is protected by a 30 A two-pole circuit disconnect.
· PWRcell DC disconnects indicate state and may be used to disconnect DC circuits.
· PWRcell DC disconnects disconnect both ungrounded DC conductors simultaneously.
· Torque all terminals as specified in Table 5-6.
NOTE: Disable inverter before turning PWRcell DC disconnects to ON position.

Table 5-6. DC Wiring Terminal Specifications

Wire Size 10 to 6 AWG

Terminal Temp Range
-40 to 266ºF (-40 to 130ºC)

Wire Min Temp Rating
194ºF (90ºC)

Torque
12 in-lb (1.35 Nm)

STOP Terminal Wiring
In the event the PWRcell Inverter will be installed indoors, or outdoors in a location far from the utility service entrance, an external switch may be installed and wired to the inverter’s STOP terminals to be the compliant PV Rapid Shutdown initiator. See Section 3: Location and Compliance PVRSS Initiation for additional information.
NOTE: If installation includes a PWRcell Battery, the battery must be equipped with external STOP terminals. Battery STOP terminals must be wired in series or parallel to the inverter STOP terminals. See below and reference the PWRcell Battery Installation & Owner’s Manual for more details.

For PV only installations without a PWRcell Battery:
1. Verify the PWRcell system is powered down.
2. Remove the jumper from the inverter STOP terminals.
3. See Figure 5-4. Use 20 ­ 14 AWG two-conductor cable with insulation rated for 600 V to connect a switch that is lockable, UL listed, and rated for at least 12 VDC, 5mA (consider a standard singlepole light switch in a weather proof box with a lockable lever).

Inverter + STOP –

Remote Shutdown Switch
013333

Figure 5-4. PV Only Remote Shutdown Switch Wiring

For Installations with a PWRcell Battery:
1. Verify the PWRcell system is powered down.
2. Remove the jumper from the inverter STOP terminals.
3. Remove the jumper for the battery STOP terminals.
4. See Figure 5-5 and Figure 5-6. Use 20 ­ 14 AWG two-conductor cable with insulation rated for 600 V to connect a switch that is lockable, UL listed, and rated for at least 12 VDC, 5 mA (consider a standard single-pole light switch in a weather proof

18

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections

box with a lockable lever). Wire the switch in series or parallel to the inverter and battery.

Battery + STOP –

Inverter + STOP –

Remote Shutdown Switch

013332

Figure 5-5. Remote Shutdown Switches Series Wiring

Battery + STOP –

Inverter + STOP –

Remote Shutdown Switch
013331

Figure 5-6. Remote Shutdown Switch Parallel Wiring
IMPORTANT NOTE: If polarity is wired incorrectly, neither device will see a STOP condition and it will not be possible to shutdown either device via the STOP terminals until the wiring is corrected.

AC Wiring
See Figure 5-7. The installer is responsible for installing 40 A overcurrent protection for wiring to AC Grid Connection Terminals (A). The conductors shall be sized in accordance with NEC Article 705 for the utility power interconnection. All other conductors in the system shall be sized in accordance with NEC Article 310 and all other applicable NEC Articles.
NOTE: Class 2 low voltage cable shall be installed independent of other power conductors. See NEC 725.136 for additional information.
· See Figure 5-7. The PWRcell Inverter is equipped with four AC grid connection terminals and three protected loads terminals.
· Use the top four terminals (A) for connection to the utility grid.
NOTE: Use L3 terminal with 3-phase inverters only.
· Use the bottom three terminals (B) for protected loads output.
· The AC Grid Connection terminals of a PWRcell Inverter must not be powered by another PWRcell Inverter’s protected loads terminals during backup operation (Island Mode).
· The protected loads terminals of two or more PWRcell Inverters must not be wired to support the same load panel simultaneously.
· Backup power ratings are separate from the power ratings for PWRcell Inverters while grid connected. See Specifications.

N1

L1

A

L2
L3 (3p)

N2
Protcd.
L1
Protcd.
L2
Protcd.
Figure 5-7. AC Wiring Terminals

B 013403

· Torque all terminals as specified in Table 5-7.

Table 5-7. AC Wiring Terminal Specifications

Terminal Wire Min

Wire Size Temp

Temp

Range Rating

Torque

8 to 6 AWG

Up to 248ºF (120ºC)

194° F (90° C)

13.3 in-lb to 15.9 in-lb (1.5 Nm to 1.8 Nm)

Installation and Owner’s Manual for Generac PWRCell Inverter

19

Electrical Connections

Protected Loads

CAUTION

Equipment damage. Never connect protected loads

terminals to other sources of power, including any other

inverter, the utility grid, or a generator. Doing so could

result in equipment or property damage.

(000648a)

CAUTION
Equipment damage. Never connect protected loads output from inverters in parallel. Doing so could result in equipment or property damage.
(000649a)
For systems equipped with energy storage, the inverter’s
protected loads terminals provide power during a grid outage.
NOTE: The protected loads terminals can only provide two phases of power in a three-phase system, 120 V L-N / 208 V L1-L2.
See Figure 5-8. The PWRcell Inverter is configured to pass grid power from the AC grid terminals to the protected loads terminals when the Protected Loads Disconnect is in the ON position, even when the inverter is disabled. During a grid outage, internal relays inside the inverter isolate the AC grid connection and the inverter powers the protected loads only, using PV array and battery power. This transition takes place in a fraction of a second.
When configured to back up a protected loads subpanel without an ATS, the PWRcell Inverter can provide up to 7.6 kW of continuous power, and it can surge up to 50 A for motor starting with an M6 PWRcell Battery attached.

NOTE: Actual power output for protected loads during a grid outage will depend on system sizing for batteries and solar array.
General Wiring Guidance:
1. Connect the Inverter AC grid terminals to a 2-pole 40 A backfeed breaker or 40 A fused disconnect for interconnection in the main panel.
2. Connect the circuits that require backup to a subpanel.
3. Size subpanel loads to the 40 A over current protection device (OCPD) for interconnection or the attached energy storage, whichever is the lesser of the two (see PWRcell Battery specifications for rated power output based on battery size).
4. Connect the subpanel to the protected loads terminals in the inverter.
5. Ensure the Protected Loads Disconnect is in the ON position.
6. Clamp CTs above the point of interconnection. See Current Transformers (CTs) for more information.
7. Run Cat 5 or Cat 6 from the CTs adapter to one of the CTs ports in the inverter.
NOTE: Class 2 low voltage cable shall be installed independent of other power conductors. See NEC 725.136 for additional information.

A F

HG

A PV Array

B

B PWRcell Inverter

C Protected Loads Panel

D Protected Loads Disconnect

E AC Main Panel

F PWRcell Battery

G Utility

H Current Transformers (CTs)

C

D

E

Figure 5-8. Single Inverter Backup Installation with Protected Loads Panel

009997

20

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections

NOTE: See Figure 5-9. On systems that do not include battery storage but where battery storage is expected in the future, install a protected loads panel during inverter installation.

HG

A PV Array

A

B PWRcell Inverter

B

C Protected Loads Panel

D Protected Loads Disconnect

E AC Main Panel G Utility H Current Transformers (CTs)

C

D

E

009998

Figure 5-9. Configuration for Adding Batteries Later

Installation and Owner’s Manual for Generac PWRCell Inverter

21

Electrical Connections

Whole Home Backup
When configured to operate with a PWRcell ATS installed directly after the utility service meter, a PWRcell system can provide power to the entire main distribution panel during a utility service interruption.
In this configuration, the PWRcell Inverter will control the PWRcell ATS upon loss of utility voltage.
NOTE: This configuration is not suitable for three phase installations.
A PWRcell system configured to operate with a PWRcell ATS can accommodate up to 9 kW ­ 11 kW maximum continuous load. This requires at least 6 ­ 8 battery modules, respectively, to be installed in one – two PWRcell Battery cabinets. Please reference pertinent specifications for desired configuration.
Install a PWRmanager for dynamic load management to prevent overloading the PWRcell system during an outage. Install Smart Management Modules (SMMs) on additional circuits as needed with PWRmanager, or utilize the PWRcell ATS Controller with SMMs for smaller applications where PWRmanager may not be required.
NOTE: A qualified installer must ensure proper load management so as not to overload the optional standby power source in any whole home backup installation. See Other Accessories for additional details on load management options.
General Wiring Guidance:
1. See Figure 5-10. Land service entrance conductors at the ‘N’ terminals of the PWRcell ATS.
2. Land new feeder conductors from the ‘T’ terminals of the PWRcell ATS to the Line side of the main distribution panel.
3. Land the PWRcell Inverter protected loads wiring (L1 Protcd / L2 Protcd) to the ‘E’ terminals of the ATS.
4. Land the protected loads neutral (N2 Protcd) to the neutral bar in the ATS.
5. Land an equipment grounding conductor from the PWRcell Inverter to the ATS ground bar.
6. Interconnect the PWRcell Inverter using a 40 A backfeed breaker in the main panel or a supplyside tap in the ATS with 40 A over current protection (OCPD) in between.
7. Land Inverter AC Grid Connection wiring (L1 / L2) to OCPD for interconnection.
NOTE: Improper installation of a PWRcell ATS can result in an objectionable current path through a paralleled neutral connection. Reference NEC 250.6. The neutral conductor for the inverter AC Grid Connection circuit is not required to be installed to the point of common coupling with the utility as permitted by the exception in NEC 200.3. Follow the PWRcell ATS Installation

Manual for proper installation. The installer is responsible for compliance with applicable national, state, and local codes.
8. Run Cat 5 or Cat 6 from the PWRcell ATS Controller to the PWRcell Inverter for ATS controls.
9. Install CTs and run Cat 5 or Cat 6 from the PWRcell ATS Controller to one of the inverter CT ports.
10. Install HVAC 24 V thermostat wiring at the PWRmanager (if installed) to manage HVAC loads. Otherwise, install HVAC 24 V thermostat wiring at the PWRcell ATS Controller.
NOTE: Reference the PWRcell ATS Installation Manual if using the PWRcell ATS Controller to manage HVAC loads. The 24 V HVAC relays on the PWRcell ATS Controller are not compatible for use with PWRmanager.
11. Wire 240 V loads to PWRmanager (if installed) to manage large house loads. Otherwise, install SMMs for 240 V loads.
12. Wire any 120 V loads to PWRmanager (if installed) to manage those 120 V loads.
NOTE: When installed with PWRmanager, SMMs should be used with lockout switch set to “Lockout Load on Generator” only.
NOTE: Class 2 low voltage cable shall be installed independent of other power conductors. See NEC 725.136 for additional information.

22

Installation and Owner’s Manual for Generac PWRCell Inverter

B A

L

K

C

G

D
F E

J M
Load Load

H

PWRmanager

I

Figure 5-10. Whole Home Backup
The following is not supported with Whole Home Backup at this time:
­ Parallel backup power with another PWRcell system.
­ Parallel operation with other energy/battery storage solutions.
­ Installations with other manufacturers’ transfer switches.
­ Support for 3 phase 120/208 V inverter installations.

Electrical Connections
A PV Array B PWRcell Inverter C PWRcell ATS D Protected Loads Wiring E Inverter AC Grid Connection F PWRcell Battery G Utility H PWRmanager I SMM J CTs K CTs Control Cable Cat 5/6 L ATS Control Cable Cat 5/6 M AC Main Panel
013239

Installation and Owner’s Manual for Generac PWRCell Inverter

23

Electrical Connections

AC Coupled PV
The PWRcell XVT076A03 Inverter has the capability to couple with an existing AC Coupled PV array for reliable energy storage with a PWRcell Battery. This feature requires the inverter firmware version to be 13754 or greater. Refer to Verifying Inverter Firmware Version for instructions.
Features:
­ Support up to 7.6 kW of AC Coupled PV in Island Mode during a utility service interruption.
­ Leverage energy storage for self-consumption, time of use, and backup applications.
­ Functional with PWRmanager for dynamic load management.
­ Functional with Smart Management Modules (lockout only).
Requirements:
­ PWRcell Inverter model XVT076A03 must be installed.
­ M6 PWRcell Battery minimum (six battery modules).
­ PWRcell ATS must be installed ahead of the backup loads panel.
­ Additional PV greater than 7.6 kW must connect in front of the ATS.
General Wiring Guidance:
1. See Figure 5-11. Land service entrance conductors at the ‘N’ terminals of the PWRcell ATS.
2. Land new feeder conductors from the ‘T’ terminals of the PWRcell ATS to the line side of the main distribution panel.
3. Land PWRcell Inverter protected loads wiring (L1 Protctcd / L2 Protcd) to the ‘E’ terminals of the ATS.

4. Land the protected loads neutral (N2 Protcd) to the neutral bar in the ATS.
5. Land an equipment grounding conductor from the PWRcell Inverter to the ATS ground bar.
6. Interconnect the PWRcell Inverter using a 40 A backfeed breaker in the main panel or a supplyside tap in the ATS with 40 A over current protection (OCPD) in between.
7. Land Inverter AC Grid Connection wiring (L1 / L2) to OCPD for interconnection.
NOTE: Improper installation of a PWRcell ATS can result in an objectionable current path through a paralleled neutral connection. Reference NEC 250.6. The neutral conductor for the inverter AC Grid Connection circuit is not required to be installed to the point of common coupling with the utility as permitted by the exception in NEC 200.3. Follow the PWRcell ATS Installation Manual for proper installation. The installer is responsible for compliance with applicable national, state, and local codes.
8. Ensure AC Coupled PV is interconnected using a backfeed breaker or a load- side tap in the main distribution panel with appropriate OCPD.
9. Run Cat 5 or Cat 6 from the PWRcell ATS Controller to the PWRcell Inverter for ATS controls.
10. Install CTs and run Cat 5 or Cat 6 from the PWRcell ATS Controller to one of the inverter CT ports.
11. Install a PWRmanager and/or Smart Management Modules (SMMs) as needed for load management.
NOTE: SMMs may only be used with lockout switch in “Lockout Load on Generator” position for AC Coupled PV applications. The PWRcell ATS Controller is not compatible for load management with AC Coupled PV.

B

L

K

C

G

A AC Coupled PV System

B PWRcell Inverter

E

C PWRcell ATS

J

D Protected Loads Wiring

40 A OCPD
F
Load

D

Load

M A

E Inverter AC Grid Connection F PWRcell Battery G Utility H PWRmanager I SMM (lockout only)

I H

PWRmanager

~
PV

J CTs K CTs Control Cable Cat 5/6 L ATS Control Cable Cat 5/6 M AC Main Panel
013238

Figure 5-11. AC Coupled PV

24

Installation and Owner’s Manual for Generac PWRCell Inverter

AC-coupled Inverter Requirements
See Figure 5-12. PWRcell equipment configured for AC PV is designed to modulate frequency to prompt thirdparty inverters OFF when:
· AC PV power cannot be exported to grid.
· AC PV power exceeds both PWRcell Battery charge capacity and local load demand.
Most UL 1741 listed interactive inverters (non-gridforming) will be compatible with the PWRcell Inverter’s range of frequency modulation, but it is the responsibility of the installer to confirm and test that third-party inverters respond appropriately to the PWRcell system.
Additionally, utility grid parameters required for interconnection may affect the ability for interactive PV inverters to couple to a PWRcell system during a grid service interruption. It is the installer’s responsibility to confirm the frequency ride-through (trip/shed) and enter service (connection/reconnection) frequency range parameters are compatible with Figure 5-12.
NOTE: The failure of third-party equipment to respond to PWRcell frequency modulation may result in the PWRcell system powering OFF and an interruption of backup power to home loads.

Condition AC PV OFF (trip) AC PV OFF (hold-off) AC PV ON

Frequency 65.1 Hz Pulse
60 Hz avg., 58.7-64.1 Hz Modulation
60 Hz with 59.8 Hz pulse

Figure 5-12. PWRcell Frequency Range with ACcPV

The following is not supported with AC Coupled PV at this time:
­ Metering of third-party PV.
­ Interaction with third-party data sources from other PV manufacturers.
­ Parallel operation with DC coupled PV (PWRzone with Generac PV Link).
­ Parallel operation with other energy storage solutions.
­ Installations with other manufacturers’ transfer switches.
­ Support for dynamic load management with SMM (priority return). Lockout will be supported.
­ HVAC load management with PWRcell ATS Controller.
­ Power Search functionality with PWRcell Battery for extended outages.
­ Support for three phase inverter installations.

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections 25

Electrical Connections

AC Generator Integration
The PWRcell XVT076A03 Inverter has the capability to
integrate a Generac Home Standby Generator for the
ultimate in savings and resilience. This feature requires the inverter firmware version to be 13754 or greater. Refer to Verifying Inverter Firmware Version for instructions.

For complete installation instructions see the PWRcell ATS Installation Manual, Section 5: Generator Integration. For general reference, see Figure 5-13 below.

B

ML K

C

A
G~EN
J I H
F E

A

PV Array

B

PWRcell Inverter

G

C

PWRcell ATS

D

AC Distribution Panel

D

E

Protected Loads Panel

F

PWRcell Battery

G

Utility

H

Protected Loads Wiring

I

Inverter AC Grid Connection

J

CTs

K

CTs Control Cable Cat 5/6

L

ATS Control Cable Cat 5/6

M

Gen Inhibit (P1 / P2)

013237

Figure 5-13. AC Generator Integration Flexible Coverage

The following is not supported with AC Generator Integration at this time. · Parallel operation with other energy / battery storage solutions. · Installations with other manufacturers’ transfer switches. · Support for 3Ø inverter installations. · Support for multi-inverter installations.

26

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections

Connecting Ethernet
IMPORTANT NOTE: Generac requires all PWRcell system components to be connected to the Internet and to maintain such connection throughout the warranty period. Internet connectivity is established via the PWRcell Inverter. By installing the PWRcell Inverter and connecting it to the Internet, Customer agrees that Generac may remotely monitor the use and condition of the system and update the system’s firmware, as necessary, without further notice. If the PWRcell system loses Internet connection for an extended period, Generac may not be able to provide important remote upgrades. In such cases, Generac may not be able to honor the full warranty.
· See Accessing Wiring Compartment for the Inverter Ethernet port location.
· Use an appropriate cord grip or strain-relief connector when running Ethernet cable with a conduit.
· Cat 5 for Ethernet should not exceed 328 ft (100 meters) in length.
· Basic high speed broadband Internet service with 5 Mbps upload/download required.
· Inverters connected by a router to a DHCP network will automatically detect settings.
· For manual IP setup, see Configuring Static IP Settings.
NOTE: It is the installer’s responsibility to verify the Internet connection is reliable and secure. Generac recommends using a hardwired connection to provide Internet connectivity. Generac does not support using any wireless or power line carrier network devices. Use these devices at your own discretion.
NOTE: Ethernet cable run must be dedicated for the inverter. This cable may not be daisy-chained to another device, including another PWRcell Inverter.
NOTE: Class 2 low voltage cable shall be installed independent of other power conductors. See NEC 725.136 for additional information.
Configuring Static IP Settings
NOTE: For networks not configured for DHCP, use the MAC address to locate the device on the network.
To manually configure settings:
1. From the REbus Beacon device page on the inverter screen, select the Installer Tool. See Access Installer Configuration Tool (optional) for more information.
2. After logging into the Installer Configuration Tool, select ‘Beacon’ from the menu.
3. Select `Simple IP Network Settings’. See Figure 514.
Installation and Owner’s Manual for Generac PWRCell Inverter

4. Adjust any of the following network configuration information as needed.
· Name · Config · Address · Netmask · Gateway · DNS1 · DNS2 · MAC 5. Press Submit to commit settings.
011462
Figure 5-14. Configure Static IP Settings NOTE: Contact your network system administrator to connect the PWRcell Inverter to a restricted network. NOTE: The PWRcell Inverter must have a reliable Internet connection in order to view PWRcell system information in the PWRview app. Verifying Connectivity NOTE: Use a laptop or other device to verify the Internet connection on the field installed Cat 5 cable. For a successful connection the following must be valid:
· The Internet LED on the control panel must be lit. NOTE: Wait at least 5 minutes after the blue light illuminates to be certain the connection is stable.
· The field installed Cat 5 cable must have a “hot” signal. Check male RJ45 ends for proper installation and confirm correct Ethernet ports at the inverter and router.
· The REbus Beacon must have a device page on the inverter control panel.
· See Figure 5-15. The REbus Beacon must have a valid IP Address. Log on to the Installer
27

Electrical Connections Configuration Tool to verify. See Access Installer Configuration Tool (optional).

Figure 5-15. Verify IP Address

012423

NOTE: After first installing, the REbus Beacon may need to receive automated updates to its firmware. This may cause the blue Internet LED to strobe while the REbus Beacon updates, and this will interrupt the Installer Tool connection momentarily.

28

Installation and Owner’s Manual for Generac PWRCell Inverter

Current Transformers (CTs)
CAUTION
Equipment damage. Only connect CTs provided by Generac. Never connect to any other CTs. Connecting to other CTs could result in equipment damage.
(000732)
Current transformers (CTs) are required to use Self Supply mode and to enable Import / Export Limiting capability. CTs also allow the inverter to provide information on utility consumption through the PWRcell Inverter control panel and the PWRviewTM mobile app.
NOTE: See Figure 5-16. When setting for Export Limiting or Zero Import, attach the label packaged with the CTs to the CTs.

Electrical Connections

Figure 5-16. Warning Label

013844

Locating Current Transformers
· See Figure 5-17. Install CTs around the main service conductors between the service meter and point of interconnection with the inverter.
· Install one current transformer per phase: ­ Install two CTs for split phase grids.
­ Install three CTs for three-phase grids.

B J

CA

D F

A Utility B PWRcell Inverter C Current Transformers (CTs) D Inverter AC Grid Connection E Point of Interconnection F AC Main Panel G Protected Loads Panel H PWRcell Battery J PV Array

H

G

E

010000

Figure 5-17. Locating Current Transformers (CTs)

Installation and Owner’s Manual for Generac PWRCell Inverter

29

Electrical Connections

NA NA CCTCTC3TC3TC+2Tr1T+1+2rr CCTCT3CT3+-T21++
CTs ATS

Connecting CTs to the Inverter
NOTE: Class 2 low voltage cable shall be installed independent of other power conductors. See NEC 725.136 for additional information.
1. See Figure 5-18. Connect CT leads to RJ-45 Breakout Adapters with push terminals (M) or screw terminals (N) according to the label on the breakout adapter.
NOTE: Use yellow lead for CTx+ and use green lead for CTx-.

M
N/AN/A CT2- CT1-

N 012424
Figure 5-18. RJ-45 Breakout Adapter
NOTE: RJ-45 Breakout Adapter is included in the Generac PWRcell Kit.
NOTE: See Table 5-8. The connection between the RJ45 Breakout Adapter and the inverter is made using an installer supplied Cat 5 cable.

Table 5-8. CT RJ-45 Pinout

Pin

Wire Color (T-568A)

1

White / Green

2

Green

3

White /Orange

4

Blue

5

White / Blue

6

Orange

7

White / Brown

8

Brown

Wire Color (T-568B)
White / Orange Orange
White / Green Blue
White / Blue Green
White / Brown Brown

Value
CT3+ CT3CT2+ CT1+ CT1CT2Not Used Not Used

2. See Figure 5-19. Connect Cat 5 cable to a CT accessory port (H).
· CT accessory ports are double-stacked RJ-45 ports.
· Either the top or bottom port may be used.

· Both ports may be used when multiple sets of CTs are required.

I

J

K

L

H

010001

Figure 5-19. Accessory Ports

H Current Transformers (CTs) Accessory Port (RJ-45)

I

Automatic Transfer Switch (ATS) Accessory Port (RJ-45)

J REbus Beacon Port (USB-B)

K Authorized Generac Personnel Only

L STOP Terminals

Connecting Multiple Sets of CTs
When installing CTs, local factors may require multiple sets of CTs to fully measure the utility power being sent to the building.
Installing two sets of CTs:
· Use two pairs of CTs to measure services with two sets of feeder conductors. Use each pair of CTs to measure a pair of service conductors / feeders within the main panel.
· Connect CT1 from both sets to the same phase and CT2 from both sets to the second phase.
· See Table 5-9: Multiple CT Connection. Connect Cat 5 cables from the adapters into the two CT accessory ports at the inverter.

NOTE: Make sure to use the same pinout and connections.
Table 5-9. Multiple CT Connection

Service

CT

Phase and Wire

Adapter

Adapter Pins

Adapter

CT Port Row
Values

1-1

L1-1

1

4 and 5 Front Port

1-2

L2-1

1

3 and 6 Front Port

2-1

L1-2

2

4 and 5 Back Port

2-2

L2-2

2

3 and 6 Back Port

Connecting CTs to Multiple PWRcell Systems / Inverters
When an installation has multiple PWRcell Inverter systems, either:
· Run a set of CTs for each inverter.

30

Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections

· Run a set of CTs to one inverter and run a Cat 5 cable from the spare CT port within that inverter to either CT port within the second inverter.
NOTE: One set of CTs may be utilized for up to two inverters.
When running separate sets of CTs for each inverter, the load value displayed on each inverter screen will be the total load measured by the CTs.

CT Calibration
· Install CTs before powering ON the inverter.
· The inverter automatically detects CTs when turned ON.
· Once CTs are detected, a utility pole icon will appear on the lower right corner of the home screen power flow diagram. Verify operation by noting power flow.

When daisy-chaining two inverters, the total measured value is shared evenly between the inverters.
NOTE: Daisy-chaining CTs between two inverters for distributed load-share is most applicable when each inverter has a battery attached. Otherwise, this configuration may not be necessary or desirable.
To daisy-chain a CT signal:
1. Connect and calibrate a set of CTs to the first inverter.

­ To calibrate CTs, navigate to the inverter device page, access the menu, and select the Calibrate CTs option.
­ Watch the screen carefully for transient validation of CTs. When the CT calibration process has been successfully completed, the inverter LCD screen will provide feedback showing ct cal success. Otherwise, the screen will show ct cal = X, where the value of X can be found in Table 5-11: Automatic Detection Troubleshooting Table.

2. Run a new Cat 5 cable between the spare CT accessory port of the first inverter to either CT accessory port on the second inverter.
3. Set GridParInvrtrs to a value of 2. See Table 5-10 below.
NOTE: Running a new Cat 5 cable between inverter CT ports prior to calibration in Step 1 may cause calibration issues.

­ CT1 must be connected to Line 1.
­ CT2 must be connected to Line 2.
­ CT3 must be connected to line 3 (for three phase applications).
­ All CTs must be orientated in the same relative direction.
­ In certain scenarios, additional setpoint modifi-

Table 5-10. CT Setpoints

Setpoint CalOverride CTTurnsRatio GridParInvrtrs

Behavior
· Overrides CT calibration. · When set to OFF, the inverter will automatically detect the direction and
number of CTs present.
· When set to ON, the inverter will assume correct CT installation and will
use the readings as is.
· Turns ratio of the CTs installed. · Default turns ratio of 1,500 is compatible with included clamp type CTs · If installation restriction requires larger accessory CTs, set point shall be
adjusted to 3,000. Verify turns ratio of CTs before modifying this setting.
· Allows two inverters to share one set of CTs. · If set to “1” only one inverter should be using a single set of CTs. · If set to “2” two inverters can share one set of CTs.

Default OFF 1,500 1

Units N/A Turns N / A

Event Name ct cal = 1 ct cal = 2 ct cal = 3 ct cal = 4

Table 5-11. Automatic Detection Troubleshooting Table

Event Code Description

0x8061

Line 1 doesn’t have a valid CT calibration

0x8062

Line 2 doesn’t have a valid CT calibration

0x8063

Line 1 & 2 don’t have a valid CT calibration

0x8064

Line 3 doesn’t have a valid CT calibration

Installation and Owner’s Manual for Generac PWRCell Inverter

31

Electrical Connections
ct cal = 5 ct cal = 6 ct cal = 7 ct cal = 9 ct cal = A ct cal = B ct cal = C ct cal = D ct cal = E ct cal = F ct cal success

Table 5-11. Automatic Detection Troubleshooting Table

0x8065

Line 1 & 3 don’t have a valid CT calibration

0x8066

Line 2 & 3 don’t have a valid CT calibration

0x8067

Line 1 & 2 & 3 don’t have a valid CT calibration

0x8069

Line 1 has multiple CTs on it (or a CT is on the neutral wire)

0x806A

Line 2 has multiple CTs on it (or a CT is on the neutral wire)

0x806B

Lines 1 and 2 have multiple or missing CTs on them (or a CT is on the neutral wire)

0x806C

Line 3 has multiple CTs on it (or a CT is on the neutral wire)

0x806D

Lines 1 & 3 have multiple or missing CTs on them (or a CT is on the neutral wire)

0x806E

Lines 2 & 3 have multiple or missing CTs on them (or a CT is on the neutral wire)

0x806F

Lines 1 & 2 & 3 have multiple or missing CTs on them (or a CT is on the neutral wire)

0x8070

Calibration was successful

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Installation and Owner’s Manual for Generac PWRCell Inverter

Electrical Connections

Other Accessories
PWRcell ATS

Figure 5-20. PWRcell ATS

012298

A Generac PWRcell ATS can be integrated into the PWRcell installation to facilitate alternate backup power configurations. Refer to the PWRcell ATS Installation Manual for additional information regarding configurations and installation instructions.
NOTE: Improper installation of a PWRcell ATS can result in an objectionable current path through a paralleled neutral connection. Reference NEC 250.6. The neutral conductor for the inverter AC Grid Connection circuit is not required to be installed to the point of common coupling with the utility as permitted by the exception in NEC 200.3. Follow the PWRcell ATS Installation Manual for proper installation. The installer is responsible for compliance with applicable national, state, and local codes.

PWRgenerator

See Figure 5-21. A PWRgenerator can be integrated into

the PWRcell installation to provide backup charging

support upon no/low PV output and low battery charge in

the event of utility power loss. Refer to the

PWRgenerator

Installation

Manual

and

PWRgenerator Owner’s Manual for installation and

operating information.

Load Management Options
Load management systems are designed to prevent a power source such as an inverter from being overloaded by large appliance loads. Options include:
· PWRmanager: Advanced Load Controller (Figure 5-22)
· Smart Management Modules (SMMs) (Figure 523)
· PWRcell ATS Controller (24 VAC thermostat control only) (Figure 5-24)

Figure 5-22. PWRmanager

013469

009379
Figure 5-23. 50 A and 100 A Smart Management Module (SMM)

Figure 5-21. PWRgenerator

000918

Installation and Owner’s Manual for Generac PWRCell Inverter

011166
Figure 5-24. PWRcell ATS Controller
33

Electrical Connections
When utilizing these load management solutions be sure to select the appropriate value for the “EnaLoadShed” setpoint. This setpoint is accessible through the Mod. Settings menu via the inverter device page as shown in Figure 5-25.
· Select a value of “1” if using PWRmanager and/or SMMs only to manage loads.
· Select a value of “2” if using the PWRcell ATS Controller (with or without SMMs) to manage loads.
NOTE: When installed with PWRmanager, SMMs should be used with lockout switch set to “Lockout Load on Generator” only. The 24 V HVAC relays on the PWRcell ATS Controller are not compatible for use with PWRmanager.

ExportOverride: CalOverride:
CTTurnsRatio: EnaLoadShed:

off off
1500 0

Cancel

Save

Figure 5-25. Mod Settings Menu

013084

If this setpoint is not set to either 1 or 2 respectively, the devices will not operate correctly with the system. In addition, be sure to thoroughly read and understand each load management device manual before installation.

34

Installation and Owner’s Manual for Generac PWRCell Inverter

Section 6: Commissioning

Commissioning

Commissioning the System
IMPORTANT: If multiple PWRcell Inverters are installed, do not turn on AC power to more than one inverter at a time. Refer to Commissioning Multiple Inverter Systems.
Before commissioning the system: · Verify all wiring terminations are tight and secure. · Perform pre-commissioning checks detailed by the Generac PWRcell Commissioning Quick Start Guide. · Verify AC voltage is within the specified range for system configuration.
­ 240 V split-phase (108­130 VAC Line to Neutral)
­ 208 V 3-phase (108­130 VAC Line to Neutral) · Verify DC wiring field terminations are secure and
polarity is correct. · Verify DC disconnects for all connected devices
are turned ON.
Commissioning steps:
1. Connect to High Speed Broadband Internet.
2. Register System.
3. Connect PWRcell Inverter to AC Power.
4. Select Inverter System Mode.
5. Configure Inverter Settings.
6. Enable REbus Devices.
7. Test Island Mode.
8. Configure Time of Use (optional).
9. Access Installer Configuration Tool (optional).
10. Set Inverter Grid Compliance (optional).
11. Set Import / Export Compliance (optional).
Connect to High Speed Broadband Internet
Refer to Connecting Ethernet for more information.
Register System
NOTE: If the system will not be connected to the Internet, installer will not be able to take advantage of PWRfleet, the customer will not have access to the PWRview app, and the warranty will be limited to five years. Contact Generac at 1-888-ACTIVATE to complete the registration.
NOTE: Registering an inverter automatically registers all REbus system components connected to that inverter.
Once the system is registered, every REbus-enabled device can be monitored from the PWRfleet fleet management platform and the PWRview mobile app.

To register a system: 1. See Figure 6-1. Locate the serial number and registration code on the registration decal on the front of the inverter. This information will be required for registration. 2. Navigate to https://pwrfleet.generac.com or, if using a mobile device, scan the QR code on the registration decal and use the “Register at PWRfleet” URL provided. 3. Follow the on-screen prompts to complete the profile.
DO NOT REMOVE
UNTIL INSTALLATION IS COMPLETE

SCAN FOR INSTALLATION STEPS AND RESOURCES OR VISIT
Generac.com/Startup

System Registration: Register your system to activate: · Warranty · PWRview and PWRfleet

Live Firmware Updates:
1-855-395-7841 8:00am-8:00pm ET, Mon- Sat

After-hours Software Update: Generac.com/PWRcell/Update

System Registration Information:

SERIAL NUMBER: XXXX-XXXXX

REGISTRATION CODE: RRRR-RRRR

System Registration Information:

SERIAL NUMBER: XXXX-XXXXX

REGISTRATION CODE: RRRR-RRRR

Figure 6-1. Registration Decal

012615

Installation and Owner’s Manual for Generac PWRCell Inverter

35

Commissioning

Connect PWRcell Inverter to AC Power
IMPORTANT: If multiple PWRcell Inverters are installed, refer to Commissioning Multiple Inverter Systems in place of this commissioning step. Do not turn on AC power to more than one inverter at a time. Turn ON main AC backfeed to power-up the inverter. See Figure 6-2. On power-up, the home screen will appear on the control panel LCD with the system mode listed at the top of the home screen.

Grid Tie

N/A

0.17kW

0VDC

244VAC

N/A

Figure 6-2. Inverter Power-Up

013105

NOTE: If grid power is temporarily not available to commission the PWRcell system and the system includes a PWRcell Battery, performing what is called a “Blackstart” can be used to start the system from the battery. See the Generac PWRcell Battery Installation and Owner’s Manual for instructions.
NOTE: Generac does not currently support autonomous, off grid installations with PWRcell equipment.
Select Inverter System Mode
NOTE: See System Modes Overview for more information.

NOTE: For systems with a PWRcell Battery, select a backup system mode. Do not select Grid Tie mode.

To select a system mode:
1. See Figure 6-2. While viewing the home screen press the center button.
2. See Figure 6-3. A list of system modes will be displayed with the current mode marked with an asterisk.

NOTE: The list of system modes may not include all those shown in Figure 6-3.

System Mode Safety Shutdown Grid Tie *
Self Supply
Clean Backup

Menu

3. See Figure 6-4. Use the up and down arrows to highlight the desired mode and press the center button to select.

System Mode Safety Shutdown Grid Tie *
Self Supply
Clean Backup

Menu

4. See Figure 6-5. Arrow right and press the center button to select Confirm.

System Mode

Menu

SA Self Supply GRd. Settings

SCELlEiPCbnar:nact0ee0l0C1T0Cs0o0n3fXiXrXmX

5. See Figure 6-6. Verify the mode listed at the top of the home screen is the desired mode.

009968
Figure 6-6. Selecting System Modes (4 of 4)

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Installation and Owner’s Manual for Generac PWRCell Inverter

Commissioning

Configure Inverter Settings
Adjusting Inverter Settings

4. Scroll through the settings using the up / down arrow keys.
5. Use the center button to select a setting.

1. See Table 6-1. Navigate to the inverter device

6. Use the up / down arrow keys to change the value

page using the right arrow key (next page right of

of a setting.

the home screen).

7. Use the center button to deselect a setting.

2. Push the center button.

8. Scroll down and save all changes before exiting

3. Select Mod. Settings using the down arrow to scroll

the Mod. Settings menu.

and the center button to select.

9. Select Mod. Settings again to verify changes were

saved.

Table 6-1. Inverter Settings

Setpoint

Range

Default

Description

PLM_Channel

0 ­ 12

Channel for REbus communications. All devices in a system must use the 1 same channel (except REbus Beacon). Do not set equipment to channel 0
unless performing Commissioning Multiple Inverter Systems.

TargMaxImprtP -30,000 to +30,000 Watts

TargMinImprtP -30,000 to +30,000 Watts

EnaIslanding

on / off

NumTranSwtchs

0 / 1 / 2

ExtTransVolt

80 ­ 140 Volts

ExportOverride CalOverride

on / off on / off

0

Maximum Threshold for importing power before the battery will discharge in Self Supply Mode to offset.

0

Minimum power import maintained by charging the battery from the grid in Self Supply Mode.

on

Allows system to go into island mode, providing backup power during a utility service interruption. Turn this setting off for PV only installations.

Defines the number of external automatic transfer switches installed and enables transfer switch controls. 0 For AC Coupled PV, this must be 1. For AC Generator Integration, this must be 1 in the Flexible Coverage configuration or 2 in the Whole Home Backup configuration.

Minimum voltage from the utility that must be present for the inverter to

100

reconnect back to the grid. If an ATS is installed, this will be the voltage required for the inverter to control the ATS back to the normal (utility) posi-

tion.

Formerly called Zero Export, this setting will inhibit the PWRcell system

off

from exporting power to the grid. This setting is for temporary use and will not satisfy CRD200 Import Only Compliance. See Set Export Override

(optional).

off

Overrides inverter logic for automatic detection of included Generac current transformers (CTs).

CTTurnsRatio 1,500 ­ 3,000 Turns

EnaLoadShed

0 / 1 / 2

GridParInvrtrs

1 ­ 2

ACPVPower

0 ­ 7.6 kW

ACGenPower

0 ­ 24 kW

ACGenCtrlMode

0 / 1 / 2

1,500 Allows a different turns ratio to be set for specific CTs.

Select 1 if using PWRmanager and / or SMM devices to manage loads.

0

Select 2 if using the PWRcell ATS Controller to manage loads (with or without SMMs). Do not use PWRmanager and PWRcell ATS Controller

together for load management.

1

This setting allows for two inverters to share one set of CTs. Set to 2 if daisy chaining CTs between two inverters.

Power rating of the attached AC Coupled PV array. Set this value to the cumulative power rating of AC Coupled PV connected to this inverter. 0 This value must reflect what is coupled. An incorrect higher value will result in insufficient charging of the batteries; an incorrect lower value will result in the possibility of an over-voltage event.

0

Nameplate power rating of the AC coupled integrated generator. If no generator is integrated, leave at 0.

To set AC Generator Control Mode, select one of the three settings below.

See AC Generator Control Modes for more info.

0

0 = Single Transfer

1 = Source Cycling

2 = Always On

Installation and Owner’s Manual for Generac PWRCell Inverter

37

Commissioning

Configuring with PWRcell Batteries
Systems with the PWRcell Battery must have the “EnaIslanding” setpoint set to `on’ in order to enter Island Mode for backup. This setpoint is accessible through the Mod. Settings menu via the inverter device page.
Verify the PWRcell Inverter protected loads disconnect is in the ON position.
Verify Battery Disconnect Switch on the PWRcell Battery is ON.
NOTE: Reference the PWRcell Battery Installation and Owner’s Manual for advanced battery settings.
Set Export Override (optional)
NOTE: This feature requires CTs to be properly installed and calibrated prior to use. For more information on CT calibration, see Current Transformers (CTs).
NOTE: This feature is NOT intended to serve as a means of achieving compliance to utility interconnection requirements. To set for zero export compliance or export limiting, see Set Import / Export Compliance (optional).

This feature is suitable as a simple and easy option for systems pending permission to operate (PTO) where the utility does not specify a requirement for the system to be powered-off or otherwise disabled pending approval. When enabled, Export Override allows the user to restrict inverter export such that excess power is not sent back to the grid. The system limits solar power generation to match power consumption measured by the PWRcell CTs. Using the Inverter control panel, a user can find this feature on the “Mod. Settings” sub-menu for the inverter.
Set for Peak Shaving (optional)
The TargMaxImprtP and TargMinImprtP setpoints allow the building to deliberately import power from the grid within certain limits. This is useful for specialized applications, such as avoiding peak demand charges.
When enabled, import and export compliance settings supersede these Peak Shaving setpoints for inverter operation involving importing grid power or exporting DCcoupled capacity to grid. For more information, see Set Import / Export Compliance (optional).
These setpoints are relevant to Self Supply mode only, and are only used for specific applications. See Table 62: Self Supply Setpoints.

Table 6-2. Self Supply Setpoints

Setpoint TargMaxImprtP
TargMinImprtP

Description
Target Maximum Import Power
· Maximum power imported from the grid at any point. · When the overall building load exceeds this setpoint, the inverter will supply
additional power from the battery and solar array to keep grid import power below this level.
· This maximum is not guaranteed. If insufficient battery and solar power is
available to cover the load, then the grid will supply the additional power.
Target Minimum Import Power
· Use this setpoint to charge the battery from the grid. · If the overall building load is less than this setpoint, the inverter will import
power to the battery to keep the grid import power up to the setpoint.
· If the building load is above the setpoint, the inverter will stop importing
additional power to charge the battery.
· This minimum is not guaranteed. Once the battery is full, grid import power
may fall below this level.

Default 0
0

Units W
W

Set for AC Coupled PV (optional)
IMPORTANT NOTE: This feature requires the inverter firmware version to be 13754 or greater. Refer to Verifying Inverter Firmware Version for instructions. This feature requires the PWRcell Battery firmware version to be 12980 or greater. More information on requesting a firmware update can be found online at https://www.generac.com/resources-and-tools/ce- installerresources/installation-resources.
NOTE: For more information about the AC Coupled PV configuration and equipment compatibility, refer to AC Coupled PV.

NOTE: For more information on inverter settings, refer to Table 6-1: Inverter Settings.
1. At the home screen, press the center button and select Self Supply or Priority Backup system modes for operation with AC Coupled PV.
2. From the home screen, use the right arrow key to navigate to the inverter device page.
3. Push the center button to access the inverter device main menu.
4. Navigate to “Mod. Settings” using the down arrow key and use the center button to select.
5. Use the down arrow key to navigate to the setting ‘NumTranSwtchs.’

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Installation and Owner’s Manual for Generac PWRCell Inverter

Commissioning

6. Select the setting using the center button.
7. Use the up / down arrow keys to change the value. For AC Coupled PV, change this value to ‘1’.
8. Deselect the setting using the center button.
9. Use the down arrow key to navigate to the setting ‘EnaLoadShed.’
10. Select this setting using the center button.
11. Use the up / down arrow keys to change the value to ‘1’ to work with PWRmanager and SMMs.
12. Deselect the setting using the center button.
13. Use the down arrow key to navigate to the setting ‘ACPVPower.’
14. Select this setting using the center button.
15. Use the up / down arrow keys to change the value corresponding to the AC power export rating of the AC Coupled PV system. If multiple PV systems are AC coupled, this value is the sum of the AC power export ratings of the systems.
IMPORTANT NOTE: The maximum allowable power value is 7.6 kW; Do not integrate AC Coupled PV system(s) with cumulative rated AC power export in excess of 7.6 kW.
16. Deselect the setting using the center button.
17. Use the down arrow key to navigate to the bottom of the “Mod. Settings” menu and select ‘Save’ using the center button to save settings changes.
Set for AC Generator Integration (optional)
IMPORTANT NOTE: This feature requires the inverter firmware version to be 13754 or greater. Refer to Verifying Inverter Firmware Version for instructions. More information for requesting a firmware update can be found online at https://www.generac.com/resourcesand-tools/ce-installer- resources/installationresources.
NOTE: Ensure 3.15 A fuses found taped to the PWRcell ATS Controller have been installed in place of the 1 A fast-blow mini fuses in the inverter wiring compartment for RGM PWR / Gen Inhibit.
1. From the home screen, use the right arrow key to navigate to the inverter device page.
2. Push the center button to access inverter device main menu.
3. Navigate to “Mod. Settings” using the down arrow key and use the center button to select.
4. Use the down arrow key to navigate to the setting ‘NumTranSwtchs.’
5. Select the setting using the center button.
6. Use the up / down arrow keys to change the value corresponding to the number of PWRcell ATS installed. Refer to the PWRcell ATS Installation

Manual Section 5: Generator Integration for more information.
·One PWRcell ATS installed (AC Generator Integration / Flexible Coverage)
·Two PWRcell ATS installed (AC Generator Integration / Whole Home Backup)
7. Deselect the setting using the center button. Use the down arrow key to navigate to ‘ACGenPower’ and select using the center button.
8. Use the up / down arrow keys to select the rated power of the integrated AC generator.
9. Deselect the setting using the center button.
10. Use the down arrow key to navigate to ‘ACGenCtrlMode’ and select using the center button.
11. Use the up / down arrow keys to change the value corresponding to the desired Generator Control Mode. For more information, refer to AC Generator Control Modes: ·0 – Single Transfer
·1 – Source Cycling
·2 – Always On
12. Deselect the setting using the center button.
13. Use the down arrow key to navigate to the bottom of the “Mod. Settings” menu and select ‘Save’ using the center button to save settings changes.

Enable REbus Devices

DANGER

Electrocution. Never enable any device during an

installation or while wires are exposed. Doing so

will result in death, serious injury, or equipment or

property damage.

(000627a)

NOTE: All PWRcell devices are enabled and configured individually through the PWRcell Inverter control panel.
Following installation, the inverter must be enabled before all other REbus devices.
To enable the inverter:
1. See Figure 6-7. Use the right arrow key to scroll to the inverter device page.
2. Verify inverter status reads disabled.

Installation and Owner’s Manual for Generac PWRCell Inverter

39

Commissioning

PWRcell 2P Inv. -02

Inverter

Disabled

AC Power:
AC Voltage: E-total:

0W
248v 2.4Wh

010010

Figure 6-7. Enabling Inverter (1 of 4)

3. Press the center button.
4. See Figure 6-8. Highlight Enable and press the center button.

PWRcell 2P Inv. -02

Inverter

grid connected

AC Power:

-36W

AC Voltage:

248V

E-total:

2.4Wh

010013

Figure 6-10. Inverter Enabled (4 of 4)

7. Enable all other REbus devices connected to the system by repeating steps 1 ­ 5 for each device. For further commissioning instructions for REbus devices, see their respective installation manuals.

PWRcell 2P Inv. Menu Enable Mod. Settings Calibrate CTs RCPn: 000100073212

Test Island Mode
To test Island Mode, AC power to the inverter must be disconnected. If configured to provide backup power to a protected loads subpanel, this may be accomplished by turning OFF the solar backfeed breaker or solar AC disconnect. If configured to operate with a PWRcell ATS, AC power must be disconnected to the inverter and the ATS to testing islanding.
­ Ensure inverter setting `EnaIslanding’ is set to ‘on.’
­ If PWRcell ATS is installed, ensure ‘NumTranSwtchs’ reflects the number installed.
­ Ensure Protected Loads breaker at the inverter Power Core is in the ON position.
­ Ensure system is set to an appropriate system mode (e.g., Clean Backup, Priority Backup, Self Supply).
NOTE: Exact electrical system configurations will vary. It is up to the operator to perform this test accurately for the configuration onsite.
NOTE: Per UL 1741, the PWRcell Inverter may require five minutes upon recovery from a grid outage or islanding event before exporting power.
Configure Time of Use (optional)
REbus Beacon allows the PWRcell system to manage energy production and storage over the course of the day. This is called Time of Use (TOU) energy management. To take advantage of this functionality, the PWRcell system must include a PWRcell Battery and a reliable connection to the Internet via an Ethernet connection to a router.
NOTE: Enable and setup the REbus Beacon for TOU scheduling only. Otherwise, do not enable the REbus Beacon.

40

Installation and Owner’s Manual for Generac PWRCell Inverter

Commissioning

Configuring and Running a TOU Schedule 1. See Figure 6-11. Navigate to the Beacon device page and press the center button to enter the device menu.
REbus Beacon TOU Scheduler disabled To enable scheduler, press center button and select “Enable”.
010109
Figure 6-11. Configuring TOU Schedule (1 of 4)
2. See Figure 6-12. Use the up and down arrows to highlight Mod. Settings and press the center button to enter the settings menu.

REbus Beacon

Menu

Enable Mod. Settings

Remove Device

RCPn: 00010012XXXX

3. See Figure 6-13. Use the up and down arrows to highlight Access Code and press the center button to select.
4. Use the up and down arrows to set the Access Code to 57, and press the center button.

NOTE: The access code is valid for five minutes. After five minutes, the access code must be entered again to
enable changes.

Access Code:

57

TOU Schedule:

1

Time Zone:

4

Cancel

Save

010111

Figure 6-13. Configuring TOU Schedule (3 of 4)

5. Use the up and down arrows to highlight TOU Schedule and press the center button to select.
6. Use the up and down arrows to adjust the TOU Schedule code. Once the desired value is set, press the center button to exit edit mode.
NOTE: See the latest Time of Use Program Guide for current TOU schedule values. The program guide is available at https://www.generac.com/resources- andtools/ce-installer-resources/installation-resources.
7. Set the Time Zone to the desired location based on Table 6-3: Time Zone Codes. Once the desired value is set, press the center button to exit edit mode.

Table 6-3. Time Zone Codes

Time Zone UTC
US / Eastern US / Central US / Mountain US / Pacific US / Alaska US / Hawaii US / Arizona US / Puerto Rico

Units 0 1 2 3 4 5 6 7 8

8. See Figure 6-14. To commit changes to all entries, highlight Save and press the center button.

Access Code:

57

TOU Schedule:

1

Time Zone:

4

Cancel

Save

010112

Figure 6-14. Configuring TOU Schedule (4 of 4)

See Figure 6-15 and Figure 6-16. When enabled, the LCD will alternate between a TOU Scheduler Running Screen and a Current System Mode screen. Both screens will display the time until the next system change and the mode the system will change to. The TOU Schedule name will be listed at the bottom of the device page.

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REbus Beacon

TOU Scheduler running

Next Change: 1h:37m

To:

Self Supply

Schedule:

SDGE

010113

Figure 6-15. Running.

REbus Beacon TOU Scheduler Priority Backup

Next Change: 1h:37m

To:

Self Supply

Schedule:

SDGE
010114

Figure 6-16. Current System Mode.
See Figure 6-17 and Figure 6-18. On the home page, the text above the power flow diagram will alternate between Scheduler Active and the current system mode.

Figure 6-17. Scheduler Active

010115

Enabling Beacon TOU Scheduler
Once the TOU Schedule is set, the scheduler will automatically enable itself and begin running. However, if the scheduler becomes disabled for any reason, follow the instructions below to re-enable the scheduler:
1. See Figure 6-19. Navigate to the REbus Beacon device page and press the center button to enter the device menu.

REbus Beacon TOU Scheduler disabled To enable scheduler, press center button
and select “Enable”.
010118
Figure 6-19. Enabling TOU Scheduler (1 of 2)
2. Highlight Enable and press the center button. 3. See Figure 6-20. Arrow right to Confirm and press
the center button.

Rebus Beacon

Menu

Enable Enable Mod. Settings

CRaClPinCb:arna0ct0ee0l1C0T0Cs0o3nXfXiXrXm

Disabling Beacon TOU Scheduler
The scheduler can be disabled at any time. To disable the scheduler:
1. See Figure 6-21. Navigate to the Beacon device page and press the center button to enter the device menu.

010116
Figure 6-18. Current System Mode

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Installation and Owner’s Manual for Generac PWRCell Inverter

Commissioning

REbus Beacon

TOU Scheduler running

Next Change: 1h:37m

To:

Self Supply

Schedule:

SDGE
010113

Figure 6-21. Disabling TOU Scheduler (1 of 3)

2. Highlight Disable and press the center button.
3. See Figure 6-22. Arrow right to Confirm and press the center button.

Rebus Beacon

Menu

Enable Disable Mod. Settings

CRaClPinCb:arna0ct0ee0l1C0T0Cs0o3nXfXiXrXm

4. See Figure 6-23. The status line on the Beacon device page will read Disabled.

NOTE: The system will remain in the current system mode until the mode is changed manually or the sched-
uler is re-enabled.

REbus Beacon TOU Scheduler disabled To enable scheduler, press center button and select “Enable”.
010118
Figure 6-23. Disabling TOU Scheduler (3 of 3)
Temporarily Overriding the TOU Scheduler The scheduler can be temporarily overridden at any time without disabling it. A manual override will apply until the next regularly scheduled system mode change. To temporarily override the scheduler:
1. Navigate to the system home page.
Installation and Owner’s Manual for Generac PWRCell Inverter

2. Press the center button.
3. Select the desired temporary system mode.
When the scheduler has been overridden:
· Temporary Override will display on the home page, alternating with the words Scheduler Active and the name of the current system mode.
· See Figure 6-24. Running, Overridden will display on the Beacon device page.

REbus Beacon TOU Scheduler running, overridden

Next Change: 1h:37m

To:

Self Supply

Schedule:

SDGE

010119

Figure 6-24. Overriding TOU Scheduler

· The countdown timer on the Beacon device page will indicate the remaining time until the next mode change.
After the next scheduled mode change, the scheduler will resume normal operation.

Disabling the TOU Scheduler in Anticipation of a Grid Outage
In the event of an impending storm and potential outage, top off the battery by disabling the scheduler and switching the system mode to priority backup or clean backup mode.
To disable the TOU Scheduler:
1. Navigate to the Beacon device page and disable the scheduler. See Disabling Beacon TOU Scheduler for more information.
2. Navigate to the system home page and change the system mode to a backup- only mode, such as Priority Backup or Clean Backup.
3. Once the emergency has passed, re-enable the scheduler. See Disabling Beacon TOU Scheduler for more information.
NOTE: If Priority Backup mode is not listed with the other system modes, the system installer may have removed the mode to comply with utility rules. Some utilities do not permit a battery to charge from the grid.

Access Installer Configuration Tool (optional)
The Installer Configuration Tool allows configuration and provisioning of Generac PWRcell systems from a smartphone or laptop. The interface allows installers to config-

43

Commissioning
ure basic settings, set inverter compliance, generate a compliance report, and understand system performance. The interface is only available on Generac PWRcell systems with a REbus Beacon installed. Close proximity to the Beacon is required for use. It is not possible to access this tool remotely. 45 minutes after being activated, the Beacon’s WiFi signal will time out and may need to be reactivated.
NOTE: All PWRcell Inverters come with a REbus Beacon pre-installed.
How to Access the Installer Configuration Tool
1. Navigate to the Beacon device page on the PWRcell Inverter control screen and press the center button.
2. Select Installer Tool from the menu and click Confirm. This will activate the Beacon’s Wi-Fi network.
3. Use a smartphone or laptop to connect to the Wi-Fi network SSID titled: REbus_Beacon_xxxx where xxxx is the last 4 digits of the Beacon’s RCP number.
NOTE: The Beacon’s RCP number can be found on the front of the Beacon located inside the inverter, as well as on the Beacon device page through the inverter’s screen. To find this number through the inverter’s screen press the center button on the Beacon device page. The RCP number will be displayed at the bottom of the menu screen.
4. Type in the password (labeled “CODE”) for the REbus Beacon’s WiFi network.
NOTE: The code for the Beacon’s WiFi network is located on the Beacon device. The code label is located in one of two locations: the front facing side or the back facing side. The Beacon is mounted on the upper lefthand sidewall of the inverter housing. If necessary, unmount the Beacon to view the code label.
NOTE: Where utility requirements contain provisions for security against adjusting compliance settings, consider removing the code label after successful commissioning.
5. See Figure 6-25. Open a web browser on a smartphone or laptop and enter 10.10.10.10 for the browser URL. The installer tool will appear in the browser.

010981
Figure 6-25. Installer Configuration Tool
Configuring Basic PWRcell Settings
NOTE: To customize basic settings, the inverter must be disabled. Before disabling the inverter, ensure all REbus devices have first been disabled. Settings changes will not be applied if the inverter is enabled.
1. Select Inverter from the menu.
NOTE: If using a smartphone, open the menu by clicking the hamburger icon in the upper-right corner of the screen. Laptop users will see the menu displayed on the left side of the screen.
2. Select PWRcell Configuration. 3. See Figure 6-26. To adjust a setting, click on it,
select the desired change, and click Submit. Any changes selected to be made, will not be implemented unless Submit is selected at the end.

010982
Figure 6-26. PWRcell Configuration

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Installation and Owner’s Manual for Generac PWRCell Inverter

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Most device settings can be adjusted through the inverter’s screen with the exception of the following settings, which can only be adjusted though the Installer Configuration Tool:
· Enabled SysModes. Allows installers the option to disable system modes, such that they cannot be enabled through the inverter control screen. To disable a system mode, tap the checkbox to uncheck the box for that mode. Click Submit to save.
· Clear Display. Allows installers to wipe the screen of any unwanted devices being retained by the memory card in the screen module. Select Clear and click Submit. The screen will go blank and test its LEDs. Allow time for the screen to reload before accessing.
· Export Limiting. CRD200 Import Only compliance to limit export or achieve zero export. See Export Limit.
· Zero Import. CRD200 Export Only compliance to remove the ability of the battery to charge from the grid. See Zero Import.
Verifying Inverter Firmware Version
Some features, such as those found in Set Import / Export Compliance (optional), require inverter firmware that may not come default to the unit installed. The firmware version of an inverter can be verified using the Installer Configuration Tool. To verify the inverter firmware version in the Installer Configuration Tool, select the ‘Common’ submenu option under the “Inverter” object as shown in Figure 6-27.

Set Inverter Grid Compliance (optional)
NOTE: The inverter must be disabled before changing utility compliance settings. Before disabling the inverter, ensure all REbus devices have first been disabled. Compliance settings changes will not be applied if the inverter is enabled.
By default, all Generac PWRcell Inverters ship in compliance with IEEE 1547 to meet UL 1741. If the system needs to be configured to comply with a different grid interconnection standard, activate the new configuration via the Installer Configuration Tool. See Access Installer Configuration Tool (optional) for more information.
1. To set an inverter to comply with a utility’s requirements, navigate to the drop-down menu in the upper right-hand corner of the Installer Configuration Tool home page and select Inverter from the drop-down menu.
2. See Figure 6-28 Click on Utility Compliance Configuration and select the appropriate utility compliance standard from the menu at the bottom of the page. Click Submit to apply the compliance standard. The settings entered will not take effect until the Submit button has been clicked.

011233
Figure 6-27. Verifying Inverter Firmware
The information populated upon selecting the ‘Common’ sub-menu option lists the manufacturer, model, version, and serial number for the inverter. The value displayed for ‘Version’ contains the hardware version and firmware version of the inverter displayed as the sequence of numbers separated by an underscore. Where an “H” represents the hardware version and an “F” represents the firmware version, the value shown for ‘Version’ would be “HHH_FFFFF.

010983
Figure 6-28. Utility Compliance Configuration
NOTE: Verify the Compliance Selection field shows the desired compliance rule after clicking Submit.
NOTE: For multi-system sites, compliance must be set on each inverter separately through each respective Beacon.
Proof of Compliance
See Figure 6-29. The Compliance PDF validates whether the system has been set up to conform to a utility compliance ruleset. Please double check that the system is configured properly by observing the `In compliance with’ line in the PDF. If the utility requires

Installation and Owner’s Manual for Generac PWRCell Inverter

45

Commissioning
proof of correct configuration, save this PDF and send it to the utility. It is recommend to keep a copy on file as well.
1. To generate a proof of compliance PDF, click on the Compliance PDF tab in the navigation menu.
2. Click on Download Report. 3. A new window will open in the browser with the
report. Verify the information is correct and save the document or send via email.

How to set:
1. Navigate to the inverter device page.
2. Disable inverter if enabled.
3. Access the Installer Configuration Tool through the REbus Beacon. See Access Installer Configuration Tool (optional).
4. Once logged onto the Installer Configuration Tool, select “Inverter.”
5. From the Inverter menu select “PWRcell Configuration.”
6. See Figure 6-30. Uncheck Priority Backup from the “Enabled SysModes” list.
7. Find the Zero Import setting and select “ENABLED”.
8. Click the “Submit” button at the bottom of the page.
9. Be sure to generate a compliance report once all compliance settings have been set. See Proof of Compliance section for more information.

010984
Figure 6-29. Proof of Compliance
Set Import / Export Compliance (optional)
By default, all Generac PWRcell Inverters ship without restrictions on import and export. Utility interconnection requirements may require the system to restrict or limit its ability to import or export power from or to the Utility grid. There are two PCS CRD200-compliant settings for PWRcell equipment: Zero Import and Export Limit.
NOTE: These settings are only available for inverter firmware version 13290 or greater. See Verifying Inverter Firmware Version for more details. To request a firmware update, please call 1-855-395-7841.
NOTE: Import / Export compliance settings rely upon proper CT functionality. Ensure CTs placement is correct for the system configuration, and ensure CTs are calibrated and functioning. See Current Transformers (CTs) for more information.
Zero Import (CRD200 Export Only compliance): allows the battery to export power to a connected utility grid but will not allow the battery to be charged from the utility grid. In Zero Import, the battery will only be charged by connected PV power sources.
NOTE: Zero Import is one-time settable. Once set, some utilities may require the request to unset this setting to come from the utility. To unset Zero Import, please contact Generac PWRcell Technical Support.
46

Figure 6-30. Zero Import

011685

Export Limit
(CRD200 Import Only compliance): allows a qualified installer to restrict the export to a connected utility grid and set an Export Limit value. When the Export Limit value is set to 0, this setting functions as a “Zero Export” mode or CRD200 Import Only mode. For this setting’s value to be active, the setting Export Limiting must be ENABLED.
NOTE: Export Limiting is one-time settable. Once set, some utilities may require the request to unset this set-

Installation and Owner’s Manual for Generac PWRCell Inverter

Commissioning

ting to come from the utility. To unset Export Limiting, please contact Generac PWRcell Technical Support.
NOTE: Export Limit setting can only be decreased from its current value. To reset the value of this setting, please contact PWRcell Technical Support.
How to set:
1. Navigate to the inverter device page.
2. Disable inverter if enabled.
3. Access the Installer Configuration Tool through the REbus Beacon. See Access Installer Configuration Tool (optional).
4. Once logged onto the Installer Configuration Tool, select “Inverter.”
5. From the Inverter menu select “PWRcell Configuration.”
6. See Figure 6-31. Find the Export Limiting setting and select “ENABLED”.
7. Scroll to the bottom and locate Export Limit.
8. Change the setting value. If Zero Export is necessary, make this value 0 (watts).
9. Click the “Submit” button at the bottom of the page.
10. Be sure to generate a compliance report once all compliance settings have been set. See Proof of Compliance section for more information.

Figure 6-31. Export Limit

011686

NOTE: These settings are included in the Compliance PDF. See Proof of Compliance section for more information.

Commissioning Multiple Inverter Systems
NOTE: Do not energize two or more inverters before commissioning. Energizing two or more inverters prior to commissioning will result in crosstalk.
PWRcell Inverters are manufactured with some common default parameters. One of these default parameters is the default Power Line Modem (PLM) channel. PWRcell Inverters use the PLM channel to communicate with and send commands to REbus-powered devices. In this way, a PWRcell Inverter behaves like a master device. If two or more master devices are communicating on the same PLM channel, REbus devices will not respond properly to the intended master device. Instead, REbus devices may respond to the wrong master device, leading to communication and reporting issues. This is referred to as crosstalk.
Multiple Inverter System Pre-Commissioning Checklist
Before commissioning multiple inverter systems, confirm the following:
· Inverter systems (including PV Links and PWRcell Batteries) have been installed per manufacturer instructions and to local and state code requirements.
· PWRcell Batteries have their Battery Disconnect Switches in the OFF position.
· PWRcell Inverters have not been powered on. If inverters have been powered on, refer to PLM Crosstalk Recovery Procedure.
· The AC Grid Connection terminals of a PWRcell Inverter are not powered by another PWRcell Inverter’s protected loads terminals during backup operation (Island Mode).
· The protected loads terminals of two or more PWRcell Inverters are not wired to support the same load panel simultaneously.
NOTE: To determine if the inverter is powered off, check the inverter control panel and the inverter AC grid connection. When powered off, the inverter control panel will be blank and the inverter AC grid connection will not have voltage present.

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Multiple Inverter System Commissioning Procedure
NOTE: Throughout this process, it is important that only one inverter is energized at any time. If two or more inverters are energized at any point during this process, the inverters will crosstalk. To resolve crosstalk, see PLM Crosstalk Recovery Procedure.
1. Perform Commissioning the System steps 1 ­ 5.
2. Modify the PWRcell Inverter PLM Channel to 0 in the inverter Mod. Settings’ menu to maintain communication with connected devices during programming. NOTE: PLM Channel 0 is a universal channel. Only use for inverters during programming. Do not set REbus devices to channel 0. Do not leave inverter on channel 0. 3\. Choose a channel from 2 ­ 12. This channel will be used exclusively for this inverter and its connected REbus devices. The channel must be unique to this inverter system. Ex. · Inverter system number 1: PV Links, battery and inverter become programmed to PLM Channel 2. · Inverter system number 2: PV Links, battery and inverter become programmed to PLM Channel 3. NOTE: Do not leave any device, including the inverter, on channel 0 or channel 1 by the end of the process. 4\. AccessMod. Settings’ for each PV Link and PWRcell Battery and change the PLM channel to the chosen channel (step 3) for that system. See device installation manual as needed for specific instructions.
5. Modify the PLM channel setpoint for the PWRcell Inverter to match the PLM channel its REbus devices were set to in the previous step.
NOTE: Be sure to click Save at the bottom of the menu after modifying the channel on each device.
6. Disable the system by pressing and holding the red Shutdown button.
7. Turn off the Battery Disconnect Switch for any connected PWRcell Batteries.
8. Turn off the inverter by opening the AC backfeed breaker or AC disconnect for that inverter.
NOTE: It may take a few seconds for the inverter screen to power off due to stored energy in the Power Core. Wait until the screen goes blank before energizing the next inverter.
9. Once the inverter is powered down, proceed to the next inverter and repeat steps 1 ­ 8, making sure to select a different and unique PLM channel for the next system.

10. After programming each system separately, restore AC power to all PWRcell Inverters by closing their AC backfeed breakers or AC disconnects, enable the inverters, and enable all REbus devices.
11. Complete the commissioning process for all inverter systems as needed by performing Commissioning the System steps 7 ­ 11. Optional steps may be skipped if not applicable.
How to identify PLM Crosstalk
Crosstalk can be easily identified by navigating to the device pages on an inverter control panel. If two inverter device pages exist, crosstalk has occurred. Similarly, if any REbus devices from one inverter show up on another, crosstalk has occurred.
NOTE: To differentiate one inverter device page from another, confirm the RCP numbers via the device page sub-menu.
NOTE: It is recommended to keep a list of which REbus devices are connected to specific inverters at multi-system sites.
PLM Crosstalk Recovery Procedure
For each PWRcell Inverter that has crosstalked, perform the following procedure:
1. Power down all but one inverter.
2. Access the Installer Configuration Tool.
3. Navigate to the Inverter and select “PWRcell Configuration.”
4. Select `Clear Display’ to wipe the screen of crosstalked devices.
5. Follow steps 1 ­ 11 for Multiple Inverter System Commissioning. See Multiple Inverter System Commissioning Procedure for more information.
6. Proceed to next crosstalked inverter and repeat this procedure.

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Installation and Owner’s Manual for Generac PWRCell Inverter

Section 7: System Operation

System Operation

General Information
The PWRcell system is a flexible, highly customizable system that can be configured in a number of ways to meet customer needs. Correct system configuration requires selecting the right equipment and the correct system mode for the system.
All REbus devices are configured and controlled through the Generac PWRcell Inverter. Connected devices will appear on the LCD display.

Home Screen
See Figure 7-2. The power flow display on the home screen illustrates the flow of power in the system. As power is generated, stored, and consumed, animated arrows indicate the flow and direction of power. System AC and DC voltage levels are displayed near the center of the screen. The current system mode is displayed at the top of the screen.

Operation and User Interface
See Figure 7-1. Generac PWRcell is controlled through the PWRcell Inverter control panel. The inverter control panel is used for adjusting system settings and for interacting with devices.
· Use left and right arrows (A) to navigate between pages.
Press center button (B) on a device page to select or deselect device settings.
B

Figure 7-2. Home Screen
Home Screen Icons

012920

REbus

Inverter

A
Shutdown (hold)

Internet

Figure 7-1. Inverter Control Panel

009894

Represents the PWRcell Inverter.
Represents the cumulative production of the solar array connected to PV Links.
Represents PWRcell Batteries, if installed.

Represents house loads including backup loads or AC Coupled AV if installed.
Represents the Utility Grid when CTs are successfully calibrated. This icon will not appear on the home screen if CTs are not calibrated.
Represents the PWRgenerator or AC coupled Generac Home Standby Generator if installed and integrated into the system.

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System Operation
Activating the System Post Permission to Operate (PTO)
After a PWRcell system has been installed, it will need to be inspected and granted permission to operate (PTO). A PWRcell system may be left in one of two states while it awaits PTO:
1. System Operating: making power with ‘Export Override’ turned ‘on’ to restrict the system from exporting to the utility grid.
2. System Disabled: not making power with inverter and all components in a disabled state (inverter screen may still be illuminated).
NOTE: For systems with a battery and a protected loads panel, the inverter’s grid connection should be closed with its 2-pole 40 A over current protection device in the ON position and the Protected Loads Disconnect in the inverter in the ON position. This will allow the protected loads panel to remain powered should the system be disabled awaiting PTO.
Activating Post PTO: System Operating
1. From the home page on the inverter control panel, use the right arrow key to navigate to the inverter device page.
2. Press the center button to access the inverter device main menu.
3. See Figure 7-3. Use the down arrow key to scroll to “Mod. Settings.”
4. Select “Mod. Settings” using the center button. 5. See Figure 7-4. Use the down arrow key to scroll
to ‘Export Override’ and select using the center button.
6. Use the up/down arrow keys to change the value of ‘Export Override’ from ‘on’ to ‘off.’
7. Use the center button to deselect ‘Export Override.’ 8. Scroll to the bottom of the “Mod. Settings” menu
and select ‘Save’ to save the changes.
PWRcell 2P Inv. Menu Disable Mod. Settings
Calibrate CTs
RCPn: 000100073212

ExtTransVolt ExportOverride off
CalOverride CTTurnsRatio

Cancel

Save

Figure 7-4. Mod Settings Menu

013446

Activating Post PTO: System Disabled
1. Ensure the inverter is powered ON with the screen illuminated.
a. If the inverter is powered OFF, close the 2-pole 40 A over current protection device for the inverter’s AC grid connection by turning the breaker or disconnect to the ON position.
2. Lift the inverter lid and confirm the occupied DC Disconnects on the left- hand side of the inverter are in the ON position.
3. For systems with battery backup, ensure the Protected Loads Disconnect is in the ON position.
4. With the screen illuminated, from the home page on the inverter control panel, press the center button to access the system modes menu.
5. See Figure 7-5 and Figure 7-6. Use the up/down arrow keys to scroll to the desired system mode and select using the center button. See Select Inverter System Mode for further instructions. See System Modes Overview for details on functionality.

System Mode

Menu

Safety Shutdown

Grid Tie *

Self Supply

Clean Backup

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Installation and Owner’s Manual for Generac PWRCell Inverter

System Operation

System Mode

Menu

SA Self Supply GRd. Settings

SCELlEiPCbnar:nact0ee0l0C1T0Cs0o0n3fXiXrXmX

6. Enable REbus devices beginning with the inverter.
7. See Figure 7-7. From the home page on the inverter control panel, use the right arrow key to navigate to the inverter device page.
8. See Figure 7-8. Press the center button to access the inverter device main menu.
9. See Table 7-9. Select “Enable” and ‘Confirm’ to enable the inverter.

PWRcell 2P Inv. -02

Inverter

Disabled

AC Power:

0W

AC Voltage:

248v

E-total:

2.4Wh

010010

Figure 7-7. Enabling Inverter (1 of 3)

PWRcell 2P Inv. Menu Enable Mod. Settings
Calibrate CTs
RCPn: 000100073212

PWRcell 2P Inv Menu Enable Enable Mod. Settings
CRaClPinCb:arna0ct0ee0l1C0T0Cs0o3nXfXiXrXm

013444
Figure 7-10. Enabling REbus Devices (1 of 3)

PV Link S2502 Enable Mod. Settings
Auto Cfg PVRSS

Menu

RCPn: 000100073212

Installation and Owner’s Manual for Generac PWRCell Inverter

51

System Operation

PV Link S2502 Menu Enable Enable Mod. Settings
ERnCaPbnCl:aen0cw0e/0lP1V0R0S0S3SXaXvXeX

PV Link S2502 -xx

Photovoltaics

Making Power

Power:

0W

PV Voltage:

115v

E-total:

59.0kWh

013439

Figure 7-13. PV Link Device Page

PV Link S2502 Disable Mod. Settings

Menu

Auto Cfg PVRSS

RCPn: 00010003XXXX

12. Confirm PWRcell Batteries are in state “standby,” “charging,” or “discharging” (state will depend on
system mode selected).

NOTE: It is only necessary to enable the REbus Beacon if setting the system to operate on a Time of Use (TOU) schedule. See Section 6: Commissioning Configure Time of Use (optional) for more information.
Confirm Inverter Settings Once the system is activated, confirm the system mode, and navigate to the inverter device page. Press the center button to access the “Mod. Settings” menu for the inverter, and confirm the settings are set correctly for the system installed.
PV Only System ­ System mode should be “Grid Tie.” ­ See Figure 7-15 and Figure 7-16. Inverter “Mod. Settings:” o ‘EnaIslanding’ should be ‘off.’ o All other settings should be at their default values.
PWRcell 2P Inv. Menu Disable Mod. Settings Calibrate CTs RCPn: 000100073212

TargMinImprtP

0

Enalslanding

off

NumTranSwtchs

0

ExTransVolt

95

Cancel

Save

013438

Figure 7-16. PV Only System (2 of 2)

PV + Battery w / a Protected Loads Panel for Partial Home Backup
­ System mode should be Self Supply, Clean Backup, or Priority Backup.
­ See Figure 7-17 and Figure 7-18. Inverter “Mod. Settings:”
o ‘EnaIslanding’ should be ‘on.’
o All other settings should be at their default values.

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Installation and Owner’s Manual for Generac PWRCell In

References

• Home | Jobs and Careers at Enterprise
• Generac Power Systems - Power Equipment and Generator Manufacturer
• Generac Power Systems - Clean Energy Installer Resources - Become an Installer
• Generac - A Total Energy Company
• Product Information, User Manuals, & Support
• P65Warnings.ca.gov
• Generac PWRfleet
• Product Registration & Activation
• Generac Power Systems - Clean Energy Installer Resources - Installation Resources
• Generac Power Systems - Clean Energy Installer Resources and Support

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