PowMr POW-LVM3K-24V 3000W Solar Inverter Pure Sine Wave Power Inverter User Manual

POW-LVM3K-24V 3000W Solar Inverter Pure Sine Wave Power Inverter

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the following is the text from the user manual / instructions:
Important Safety Instructions
Please save these instructions for future use!
Read all of the instructions and cautions in the manual before beginning the installation !
Important Safety Instructions
Installation and wiring must comply with the Local and National Electric Codes (NEC) and must be done by a certified technician.
Do NOT disassemble or attempt to repair the inverter. There are no serviceable parts for this inverter.
DO NOT parallel this device with other AC input sources to avoid damage. DO NOT attempt to touch the unit while it is operating as temperatures will be very
hot. In addition, do not open the terminal cover while the unit is in operation. Make sure all connections going into and from the inverter are tight. There may be
Table of Contents
Important Safety Instructions …………………………………………………………………………… 1 General Information …………………………………………………………………………………………. 3
General Information
Key Features
1.Full digital voltage and current double closed loop control, advanced SPWM technology, output of pure sine wave.
2.Two output modes: mains bypass and inverter output; uninterrupted power supply. 3. Available in 4 charging modes: Only Solar, Utility Priority, PV Priority, Utility & Solar
hybrid charging. 4. Advanced MPPT technology with an efficiency of 99.9%. 5.Designed with a LCD screen and 3 LED indicators for dynamic display of system data
and operating status. 6. Manual ON/OFF switch controlling AC output. 7.Power saving mode available to reduce empty load loss. 8. Intelligent variable speed fan to efficiently dissipate heat and extend system life. 9. Lithium battery activation by PV solar or mains, allowing access of lead-acid battery
and lithium battery. 10.Complete protections, including short circuit protection, over voltage and under
voltage protection, overload protection, reverse protection, etc.
Photovoltaic Modules (PV): convert light energy into DC power, charge the battery through the solar inverter charger, or directly reverse into alternating current to power the load.
Power or generator (Utility): Access at the AC input can power the load and charge the battery. If you do not have a power supply or generator, the system can also operate normally, where the load is supplied by batteries and photovoltaic modules.
Battery: The role of the battery is to ensure the normal use of electricity for the system load when the solar energy is insufficient and there is no electricity.
Household load: Can be accessed to a variety of household and office loads, including refrigerators, lamps, televisions, fans, air conditioning and other AC loads.
Battery Charging Modes: The solar inverter will have 4 operational charging modes which changes the logic as how and when to charge the battery banks. The solar inverter has four charging modes: PV priority, Utility Priority, Hybrid Charging, and Only Solar Charging.
PV Priority In PV Priority mode it will make full use of the solar input during the day in order to charge the battery bank. This effectively allows using the unit off-grid during peak utility times in order to cut costs on utility charging. Only when solar fails to start or is interrupted will the unit automatically switch to utility mode for backup.

Important Safety Instructions
Please save these instructions for future use!
Read all of the instructions and cautions in the manual before beginning the installation !
Important Safety Instructions
Installation and wiring must comply with the Local and National Electric Codes (NEC) and must be done by a certified technician.
Do NOT disassemble or attempt to repair the inverter. There are no serviceable parts for this inverter.
DO NOT parallel this device with other AC input sources to avoid damage. DO NOT attempt to touch the unit while it is operating as temperatures will be very
hot. In addition, do not open the terminal cover while the unit is in operation. Make sure all connections going into and from the inverter are tight. There may be
sparks when making connections, therefore, make sure there are not flammable materials or gases near installation. Installing breakers or fuses outside of the unit is recommended. After installation, check that all line connections are tight and secured. Do NOT let the positive (+) and negative (-) terminals of the battery touch each other. Use Lithium batteries or deep cycle Sealed Lead Acid, Flooded, Gel, AGM batteries. Explosive battery gases may be present while charging. Be certain there is enough ventilation to release the gases. Be careful when working with large lead acid batteries. Wear eye protection and have fresh water available in case there is contact with the battery acid. Over-charging and excessive gas precipitation may damage the battery plates and activate material shedding on them. Too high of an equalizing charge or too long of one may cause damage. Please carefully review the specific requirements of the battery used in the system.

Table of Contents
Important Safety Instructions …………………………………………………………………………… 1 General Information …………………………………………………………………………………………. 3
Key Features ………………………………………………………………………………………………. 3 Battery Charging Modes ……………………………………………………………………………….. 4 Load Output Working Modes …………………………………………………………………………. 7 Product Overview ……………………………………………………………………………………………. 8 Dimensions …………………………………………………………………………………………………….. 9 Installation…………………………………………………………………………………………………….. 10 Location Recommendations ………………………………………………………………………… 10 Wiring ………………………………………………………………………………………………………. 12 Battery Wiring……………………………………………………………………………………………. 13 PV Wiring………………………………………………………………………………………………….. 14 AC Output Wiring……………………………………………………………………………………….. 15 AC Input Wiring …………………………………………………………………………………………. 16 Communication Ports…………………………………………………………………………………….. 17 Dry Contacts……………………………………………………………………………………………… 17 RS485 ………………………………………………………………………………………………………. 17 USB …………………………………………………………………………………………………………. 17 Operation………………………………………………………………………………………………………. 18 LCD Operation …………………………………………………………………………………………… 18 LCD Menu Screens …………………………………………………………………………………….. 22 LCD Programmable Features………………………………………………………………………….. 23 Electronic Protections ……………………………………………………………………………………. 29 Fault Codes …………………………………………………………………………………………………… 30 Maintenance ………………………………………………………………………………………………….. 31 Technical Specifications ………………………………………………………………………………… 32 Non-Lithium Battery Parameters…………………………………………………………………… 34 Lithium Battery Parameters …………………………………………………………………………. 35 Charging Parameters Glossary……………………………………………………………………….. 36

General Information
Pow series is a new hybrid solar charge inverter, which integrates solar energy storage & means charging energy storage and AC sine wave output. Thanks to DSP control and advanced control algorithm, it has high response speed, high reliability and high industrial standard. Four charging modes are optional, i.e. Only Solar, Mains Priority, Solar Priority and Mains & Solar hybrid charging; and two output modes are available, i.e. Inverter and Mains, to meet different application requirements. The solar charging module applies the latest optimized MPPT technology to quickly track the maximum power point of the PV array in any environment and obtain the maximum energy of the solar panel in real time. Through a state of the art control algorithm, the AC-DC charging module realizes fully digital voltage and current double closed loop control, with high control precision in a small volume. Wide AC voltage input range and complete input/output protections are designed for stable and reliable battery charging and protection. Based on full-digital intelligent design, the DC-AC inverter module employs advanced SPWM technology and outputs pure sine wave to convert DC into AC. It is ideal for AC loads such as household appliances, power tools, industrial equipment, and electronic audio and video equipment. The product comes with a segment LCD display design which allows real-time display of the operating data and status of the system. Comprehensive electronic protections keep the entire system safer and more stable.
Key Features
1.Full digital voltage and current double closed loop control, advanced SPWM technology, output of pure sine wave.
2.Two output modes: mains bypass and inverter output; uninterrupted power supply. 3. Available in 4 charging modes: Only Solar, Utility Priority, PV Priority, Utility & Solar
hybrid charging. 4. Advanced MPPT technology with an efficiency of 99.9%. 5.Designed with a LCD screen and 3 LED indicators for dynamic display of system data
and operating status. 6. Manual ON/OFF switch controlling AC output. 7.Power saving mode available to reduce empty load loss. 8. Intelligent variable speed fan to efficiently dissipate heat and extend system life. 9. Lithium battery activation by PV solar or mains, allowing access of lead-acid battery
and lithium battery. 10.Complete protections, including short circuit protection, over voltage and under
voltage protection, overload protection, reverse protection, etc.

Photovoltaic Modules (PV): convert light energy into DC power, charge the battery through the solar inverter charger, or directly reverse into alternating current to power the load.
Power or generator (Utility): Access at the AC input can power the load and charge the battery. If you do not have a power supply or generator, the system can also operate normally, where the load is supplied by batteries and photovoltaic modules.
Battery: The role of the battery is to ensure the normal use of electricity for the system load when the solar energy is insufficient and there is no electricity.
Household load: Can be accessed to a variety of household and office loads, including refrigerators, lamps, televisions, fans, air conditioning and other AC loads.
Battery Charging Modes: The solar inverter will have 4 operational charging modes which changes the logic as how and when to charge the battery banks. The solar inverter has four charging modes: PV priority, Utility Priority, Hybrid Charging, and Only Solar Charging.
PV Priority In PV Priority mode it will make full use of the solar input during the day in order to charge the battery bank. This effectively allows using the unit off-grid during peak utility times in order to cut costs on utility charging. Only when solar fails to start or is interrupted will the unit automatically switch to utility mode for backup.

Utility Priority In Utility Priority mode, the detected AC input will be priority for battery charging. If the power becomes unstable or unusable, then it will switch to PV charging.
Hybrid Charging In Hybrid Charging, PV and Utility will work together to charge the battery bank at the same time. Priority will be given to PV and utilize MPPT charging. Upon PV charging being insufficient, the power supply replenishes with Utility power. This method is the fastest to charge and suitable for unstable areas of the grid, ready to provide adequate backup power supply.
Only Solar Charging Only solar charging is the most energy-efficient way to charge your battery bank and does not make use of AC input. Utility will not charge the battery, even if it is available.

Load Output Working Modes The solar inverter has 3 working modes that dictate how the incoming power is used to power the loads.Users may configure the output source priority to configure load power.
PV Priority In this mode only the incoming solar energy and battery power are used to power the loads. This can maximize the use of green energy when selecting PV priority in Battery Charging Mode to achieve overall energy conservation and emission reduction. Upon there being no more usable solar energy or the battery voltage drops to a low voltage setpoint, then the unit will switch to utility power to continue to power up the loads. It is recommended to be in this mode for relatively stable areas.
Utility Priority Equivalent to a backup UPS for use in unstable areas of the grid, Utility will provide power to the loads as priority. Solar and battery energy will provide power to the loads only when utility power is not available.
Inverter Mode The Battery energy will supply power to the loads. Utility provides power to the loads only when battery voltage drops to low voltage which maximizes the use of DC power.

Identification of Parts

Product Overview

Key Parts

1

LCD Buttons

9

2

Mounting Holes

10

3

LCD Screen

11

4

LED Indicators

12

5

AC Input Breaker

13

6

Dry Contact Port

14

7

RS485 Communication Port

15

8

USB Debugging Port (Internal Use)

AC Input Terminal AC Output Terminal
Cooling Fans PV Input Terminal ON/OFF Rocker Switch Battery Input Terminal
Grounding Lug

Dimensions

Installation
Please read this manual carefully and familiarize yourself with the installation procedures before installation.
Installation Safety
The unit should be installed in a well-ventilated, cool, and dry environment. Make sure the fans of the unit and the ventilation holes are not blocked.
Do not expose the unit to rain, moisture, snow, or liquids of any type.
Never install the inverter in a sealed enclosure with flooded batteries. Gas can accumulate and there is a risk of explosion.
Do not install the inverter in the same compartment as the battery bank because it could serve as a potential fire hazard.
Location Recommendations
Ensure installation follows the following guidelines: 1. Cool, dry, well- ventilated area — Heat is the worst enemy for electronic equipment.Inverters must be in an area where the fans are not blocked or where they are not exposed directly to the sun. They should be in an area free of any kind of moisture and allow for clearance of at least 8″ around the unit to provide adequate ventilation. 2. Protection against fire hazard — the unit should be away from any flammable material, liquids, or any other combustible material. The unit can spark and the consequences could be severe. 3. Close proximity to battery bank–prevent excessive voltage drop by keeping the unit close to the battery bank and having a properly sized wire going from the battery bank to the inverter. 4. Limiting electromagnetic interference (EMI) — ensure the inverter is firmly grounded to a building, vehicle, or earth grounded. Keep the inverter away from EMI receptors such as TVs, radios, and other audio/visual electronics to prevent damage/interference to the equipment.

Other Precautions:
When installing the battery, be very careful, when installing lead-acid liquid batteries, you should wear protective glasses, once in contact with battery acid, please wash with water in time.
Avoid placing metal objects near the battery to prevent short circuits in the battery. Acid gas may be generated when the battery is charged so ensure good ventilation
around the environment. Incorrect or improper connection points and corroded wires can cause great heat to
melt the wire insulation, burning surrounding materials, and even cause fire, so ensure that the connection is tightened It is best to avoid mobile applications when the wire shakes and cause the connection head loose. Outdoor installation should avoid direct sunlight and rain, snow. Do not install the solar inverter in harsh environments such as damp, greasy, flammable and explosive areas or where dust accumulation is high. The municipal electrical input and AC output are high voltage, do not touch the wiring. Do not touch the unit when the fan is working. To avoid damage, do not use more than one (in parallel) input AC power supply.
8inches / 200mm

8inches 200mm

8inches 200mm

8inches / 200mm
Please Note: While the Solar inverter has fans for cooling, this installation location optimal for natural convection cooling will improve the overall efficiency

Wiring
The PowMr Solar Inverter is suitable for 24V battery banks systems ONLY. Not following the minimum DC requirement may cause irreversible damage to the unit. The solar inverter components at the AC input/output, battery components, and PV components will produce high energy output. Make sure to connect The appropriate component to the appropriate labeled terminals. Be careful of the positive and negative poles. Reversing the poles may cause permanent damage to the inverter. The input terminals of the inverters have large capacitors connected to them. Once a positive and negative wire are connected to the terminals, it will complete the circuit, and commence drawing a heavy current momentarily. As a result, there may be a sparking occurring even if the inverter is in the off position. To minimize sparking, it is recommended that the user have the appropriate size wire feeding into the solar inverters and/or install an external fuse leading into the inverter. After the power switch is switched off, there is still high energy inside the solar inverter, do not open or touch the internal device, wait for the capacitance to be put off after the relevant operation.

Locate the power button on the solar

ON

inverter and make sure the solar inverter

main power is turned off

OF
Remove the terminal cover by unscrewing the appropriate terminals located on the face of the solar inverter

Wiring and installation methods must comply with national and local electrical specifications. The following chart is reference only. Longer wire runs between solar panels and the solar inverter as well as longer runs between the solar inverter and battery bank will require thicker wiring size to minimize loss and improve system performance.

Specification
Battery Wiring PV Wiring*
AC Input Wiring AC Output Wiring

Minimum Recommended Wiring AWG 2AWG 7AWG 7AWG
7AWG

Max Amps
140A 40A 40A 40A

Battery Wiring

Be careful of the positive and negative poles. Reversing the poles may cause

permanent damage to the inverter.

The input terminals of the inverters have large capacitors connected to them.

Once a positive and negative wire are connected to the terminals, it will

complete the circuit, and commence drawing a heavy current momentarily.

As a result, there may be a sparking occurring even if the inverter is in the off

position. To minimize sparking, it is recommended that the user have the

appropriate size wire feeding into the solar inverters and/or install an external

fuse leading into the inverter.

Rated Battery Discharge Current
140A

Maximum Battery Recommended

Charging Current

Wiring

100A

2AWG

Recommended Circuit Breaker
2 pole-160A

Recommended Ring Terminal
5/16″

Make sure any circuit breakers are disconnected and ensure the unit is in the off position

The solar inverter takes a 24V battery input to operate. This will require combining 12V or 6V batteries in series to achieve the minimum voltage DC requirement. It is recommended to use battery cables with ring terminals. The ring terminals must be firmly tightened and secured on the respective battery terminals to prevent any excessive heating or resistance. Connect the positive and negative battery ring terminals to the respective positive and negative battery terminals on the solar inverter.

PV Wiring
Maximum PV Charging Current
40A

Recommended Wiring
7AWG

Recommended Circuit Breaker
2 pole-63A

Recommended Wiring
Bare Wire

For PV to charge 24V battery banks, you will need a minimum PV Voc voltage of 30V DC.
When combining panels in parallel it is recommended to use a combiner box for safety and organizational precautions. The solar inverter accepts a maximum of 100VDC input and requires a 24V battery input to operate. This will require combining solar panels in series or series parallel to achieve the minimum voltage DC requirement. Due to many factors affecting PV performance, it is recommended to utilize the open circuit voltage (Voc) when connecting panels in series to make sure you stay under the 100VDC input. For parallel connections, it is recommended to use the short circuit current (Isc) to make sure you are well under the 40A limit.

The bare wire terminal blocks must be firmly tightened and secured to prevent any excessive heating or resistance. Connect the positive and negative PV wire to the respective positive and negative PV terminal block on the solar inverter.

AC Output Wiring
Only the Live and Neutral wires will be connected to the Output Terminal Block, the Ground will be connected to the screw terminal.

Make sure any circuit breakers are disconnected and ensure the unit is in the off position.

AC Output should NEVER be connected to public power/utility or a generator.

There are two terminal blocks with “IN” and “OUT” markings. Please do NOT misconnect input and output connectors.

Maximum Inverter Bypass Current
40A

Recommended Wiring 7AWG

Recommended Circuit Breaker
2 pole, 63A

Carefully place the correct AC wire into the respective AC Output terminal block. The ground output cable will need to be connected to the ground screw terminal located separately from the output terminal block. It is recommended to keep ground as close as possible to the solar inverter charger, the shorter the ground wire, the better. The order should be as follows:

Ground | LLive | NNeutral

AC Input Wiring The AC input must never be connected to the AC output as irreversible overload or damage may result
The AC Input Terminal Block is connected to circuit breakers for added protection. Do not modify or alter them as it may cause irreversible damage to the solar inverter.
There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis- connect input and output connectors.
Run the AC input line through the AC input cable entry slot. Make sure to use appropriate cable sizing when working with AC. Carefully place the correct AC wire into the respective AC Input terminal block. The order should be as follows:
Ground | LLive | NNeutral

Communication Ports

Dry Contacts
To use this to function, an auto start controller must be installed on the generator. there are three contacts; up to down: NO, N, NC
Do not store units with auto gen start feature enabled. Generators exhaust dangerous fumes when running.

RS485

This contact automatically starts the generator and charges the battery bank. Under normal conditions, this terminal is NC-N point closed, NON point open. When the battery voltage reaches the low voltage point, the relay coil is energized, and NO-N point now is closed and NC-N point now is open.
The NO-N contact can drive the resistive load of 125VAC/1A, 30DCV/1A
While the generator is connected, the unit now operates in “Charging Mode” with the AC power from the Generator charging the batteries as well as providing power to the AC loads.
This port is an RS485 communication port ; Communication is an optional function, which is not available in the standard machine.
This port is an RS485 communication port which comes with two functions: It allows direct communication with the optional host computer developed by our company through this port, and enables monitoring of the equipment running status and setting of some parameters on the computer; It also allows direct connection with the optional RS485 to Bluetooth communication module developed by our company through this port. After the module is selected, you can connect the solar charge inverter through the mobile phone Bluetooth APP, on which you can view the operating parameters and status of the device.

As shown in the figure: Pin 1 is 5V power supply, Pin 2 is GND, Pin 7 is RS485-A, and Pin 8 is RS485-B ; Pin 5 is CAN-H, and Pin 6 is CAN-L ;
USB The USB port is for internal purposes only. It will not be supported as it requires proprietary information.
When using both USB and RS485, you can only use one of two alternatives, not use both simultaneously.

Operation

Assuming all connections are correct and tightly secured, Locate the

power button on the solar inverter and turn the main power switch to

ON

the ON position.

The following describes the basic operation of the solar inverter charger

OFF

LCD Operation

The solar inverter is equipped with 3 LCD indicators and 4 working buttons

UP

DOWN

ENT

LED

Color Behavior

Parameter

AC/INV Yellow

Solid Flash

The output will be powered by the AC Line The output is powered by battery or PV in battery mode

CHARGE Green

Flash Solid

Battery is charging Battery is fully charged

FAULT Red Solid / Flash System fault

Key SET UP DOWN ENT

Parameter Go to / Exit Settings menu Previous selection Next choice Under the Settings menu, determine/enter options

The arrow only displays during

1

startup and not part of the solar

inverter functionality

Indicates that the utility/grid

2

is powering the load

Indicates that the power utility/grid

3

is powering the battery charging

circuit (AC-DC)

Indicates solar (PV) power to

4

the battery charging circuit (DC-

DC)

5

Indicates that the charging circuit is charging the battery

The arrow only displays during 6 startup and not part of the solar
inverter functionality

Indicates that the battery is 7 powering the inverter circuit (DC-
AC)

8

Indicates that the inverter circuit is powering the load

Icon

Function

Indicates that the AC input is connected to AC Source

This icon indicates a wide voltage AC input Mode (APL mode)

Icon

Function

Indicates that the inverter mode circuit is working

Indicates that the solar inverter charger is in the power bypass (Bypass)

Indicates that the PV input is connected

Indicates that the AC output is in an overload state

Indicates that the solar inverter charger is connected to the battery. Status:
0 %~24%,
25%~49%,
50%~74%,
75%~100%

Indicates load percentage in 25% increments from the overall wattage of the solar inverter charger
0 %~24%,
25%~49%,
50%~74%,
75%

Indicates that the current battery type of the solar inverter charger is lithium

Indicates that the buzzer is not enabled

Indicates that the current battery type of the solar inverter charger is a sealed lead acid

Indicates that an alarm has occurred on the solar inverter charger

Indicates that the battery is charging

Indicates that the solar inverter charger is in a faulty state

Indicates AC/PV charging circuit is working
AC Load voltage output

Indicates that the solar inverter charger is in set mode
1.When not in setting mode displays alarm or fault code. 2.In the setup mode, the currently set parameter item code is displayed.

The following is on the left side of the LCD Indicates AC input
Indicates PV input
Indicates inverter circuit
This icon is not displayed
Shows battery voltage, total battery charge current, charge power, AC input voltage, AC input frequency, PV Input voltage, internal heat sink temperature, and software version
The following is on the right side of the LCD
Indicates output voltage, output current, output power, output visual power, battery discharge current, software version. In this setting mode, the settings under the currently set parameter item code are displayed

LCD Menu Screens On the LCD home screen, press the “UP”and”DOWN” buttons to turn the
page to view the solar inverter’s real-time data.

1 Battery Input Voltage

Load Output Voltage

2 PV Temperature

PV Output Kilowatts

3 PV Input Voltage

PV Output Current

4 Battery Input Current

Battery Output Current

5 Battery Input Kilowatts

Battery Output Kilowatts

6 AC Input Frequency 7 AC Input Voltage

Fault code

AC Output Load Frequency AC Output Load Current

8 Internal Parameters

Load Output KVA

9 Inverter Temperature

Inverter Output Load Kilowatts

10 APP Software Version

Bootloader Software Version

11 Model Battery Voltage Rating

Model Output Power Rating

12 Model PV Voltage Rating

Model PV Current Rating

LCD Programmable Features

Press the “SET” key to enter parameter setting mode. After entering the settings menu, the parameter number 00 flashes and you can press the “UP” and “DOWN” keys to select the parameter code that you want to set. To access the parameter program press “ENT” key to enter the parameter editing state, at which point the value of the parameter flashes. Adjusts the value of the parameter through the “UP” and “DOWN” buttons, and finally press “ENT” to press the key, complete the edit of the parameter, and return to the parameter selection state.

Parameters Number Parameter Name Set options

Description

00

Exit

[00] ESC Exit the settings menu [01] SOL

Solar energy provides power to the loads as priority. If solar energy is not enough to power all connected loads, battery energy will supply power the loads at the same time. Utility provides power to the loads only when any one condition happens: Solar energy is not available Battery voltage drops to low- level set-point in Program [04]

01

Load Working Mode

Utility will provide power to the loads [01] UTI as priority. Solar and battery energy

Default will provide power to the loads only

when utility power is not available

[01] SBU

Solar energy provides power to the loads as priority. If solar energy is not enough to power all connected loads, battery energy will supply power to the loads at the same time. Utility provides power to the loads only when battery voltage drops to low-level set-point in Program[04] [02] 50.0 The output frequency can be set

02

Output Frequency

[02] 60.0 (Default)

through this menu. By default, the value should be 60Hz

[03] APL

By default, the input voltage range is the same, 90~140VAC

03

AC Input Voltage Range

[03] UPS By default, the input voltage range

(Default) is the same, 90~140VAC

Parameters Number Parameter Name

04

Battery Power to Utility Setpoint

Set options
21.8V (Default)

Description
Setting voltage point back to utility source when selecting “SBU ” or “SOL” in program [01]. When the voltage of the battery is lower than this setting, the output switches from inverting to the utility. The setting range is from 21.8V – 26V, in 0.2V increments. Cannot exceed the value of [14] settings.

Setting voltage point back to battery

mode when selecting “SBU” or

“SOL” in program [01]. When the

05

Utility to Battery Power setpoint

[05] 28.8V (Default)

battery voltage is higher than the setting value, the output is switched from the utility to the battery mode.

The setting range is 24V – 30V, in

0.2V increments.

*Cannot be lower than the value of

[04] / [35] settings.

Solar energy will charge battery as

[06] CSO

priority. Utility will charge battery only when solar energy is not

Battery Charging

available

Mode Please Note: If this inverter /charger is working in Battery mode or

[06] CUB

Utility will charge battery as priority. Solar energy will charge battery only when utility power is not available

06

Power saving mode, only solar

Solar energy and utility will charge battery at the same time. MPPT

energy can charge battery.
Solar energy will

[06]SNU (Default)

Solar energy will be priority charging and when it is insufficient, Utility will become priority. When

charge battery if it’s

the photovoltaic energy is sufficient

available and

again, Utility will stop charging

enough

[06] OSO

Solar energy will be the only charging source even if utility is available

07

Maximum charging current:
(Max. charging current = utility charging current + solar charging
current)

[07] 60A (Default)

The maximum solar charging is 60A, the maximum Grid/Utility charging is 40A (adjustable in Program 28), totaling the maximum current of 100A.The range can be configured between 0 ~ 100A

Parameters Number Parameter Name

Set options

Description

[08] USE

User-defined, all battery parameters can be set

[08] SLD (Default)

Sealed lead-acid/AGM battery, constant voltage charging 28.8V, float charging voltage 27.6V

08

Battery type

09 *available in USER and lithium setting
only

Boost Charge Voltage

[08] FLD

Flooded lead-acid battery,constant voltage charging 29.2V,float charging voltage 27.6V

[08] GEL
[08] LF07 LF08 LF09
[08] NCA

Gel lead-acid battery, constant voltage charging 28.4V,float charging voltage 27.6V
Lithium iron phosphate battery LF07/LF08/LF09, corresponding to 7 strings ,8 strings and 9 strings of lithium iron phosphate battery; for 7 strings, default constant-voltage charge voltage is 24.8V; for 8 strings, default constant-voltage charge voltage is 28.4V; for 9 strings, default constant- voltage charge voltage is 31.8V; allow adjustable.
Ternary lithium battery; the default constantvoltage charge voltage is 28.4V, which is adjustable.

[09] 28.8 (Default)

Boost charge voltage setting; the setting range is 24V~29.2V, with step of 0.2V; it is valid for userdefined battery and lithium battery.

10 *available in USER
setting only

Boost Charge Duration

[10] 120 min (Default)

Raise the boost charge time setting, refers to the constant voltage charging reached at Program [09] . The range is 5min to 900min, in 5 minute increments

11 *available in USER
setting only

Float Charge Voltage

[11]27.6V Floating charging voltage set range (Default) 24V to 29V, in 0.2V increments

Parameters Number Parameter Name

12 *available in USER and lithium setting
only

Low Voltage Load Disconnect

Set options
[12] 21V (Default)

Description
It is recommended to set this voltage below the maximum voltage the battery can withstand. When this voltage is reached, the loads will be powered off after a time delay adjustable in Program [13] The range is 20V to 24V, in 0.2V increments

Battery Over-

discharged

Delay Time

**If a power

shortage occurs

and recovers in a

short time, it can

13

cause damage to

*available in USER your connected

and lithium setting appliances. To

only

prevent this kind of

damage, please

check manufacturer

if heavy load

appliances are

equipped with

time-delay function

before installation

[13] 5S (Default)

The following parameter sets the
delay-time after the battery voltage
is below the set-point in Program [12]. The set range is 5-50 seconds, in 5s increments

14

*available in USER

Battery

and lithium setting Undervoltage Alarm

only

[14] 22V (Default)

15 *available in USER and lithium setting
only

Battery Discharge Limit Voltage

[15]20V (Default)

Warning that the battery is approaching low voltage. The output does not shut down and the range is 20V to 26V, in 0.2V increments
When the battery voltage goes below this voltage set-point, the solar inverter will immediately disconnect and shut down immediately. The set range is 20V to 26V, in 0.2V increments

16 *available in FLD and USER setting
only

Set Equalization charging

[16] DIS
[16] ENA (Default)

No equalization charging Enables equalization charging

17 *available in FLD and USER setting
only

Battery Equalization Voltage

[17] 29.2V (Default)

Set equalization charging voltage. The range is 24V to 29.2V, in 0.2V increments

Parameters Number Parameter Name

18 *available in FLD and USER setting
only

Battery Equalization Duration

Set options
[18] 120min (Default)

Description
Setting range is from 5min to 900 min. , in 5min increments

19 *available in FLD and USER setting
only

Battery Equalization [19] 240min

Time-Delay

(Default)

Setting range is from 5min to 900 min, in 5min increments

20 *available in FLD and USER setting
only

Equalization interval

[20] 30 days Setting range is from 0 days to 30 (Default) days, in 1 day increments

21 *available in FLD Enable Equalization and USER setting Immediately
only

[21] DIS (Default)
[21] ENA

Stops equalization charging immediately
Starts Equalization charging immediately

[22] DIS Default

Disables power-saving mode

22 *Power-saving Mode Power-saving Mode
(ECO Mode)

[22] ENA

After the power saving mode is enabled, if the load is null or less than 50W, the inverter output is turned off after a delay for a certain period of time. When the load is more than50W, the inverter automatic restart.

[23] DIS

Overload automatic restart is disabled, and the unit will not turn on the loads

23

Overload auto-start

Enables automatic restart if the load shutdown output has occurred.

[23] ENA The unit attempts to restart the

(Default) output after 3 minutes and After 5

attempts the unit will not longer

resume to turn on the loads

[24] DIS

Over-temperature automatic restart is disabled

24

Overtemperature auto-start

The over-temperature protection is [24] ENA activated and upon temperature

(Default) dropping, the unit automatically

restarts

Parameters Number Parameter Name

25

Buzzer alarm

26

Alarm

Set options

Description

[25] DIS No alarm [25] ENA (Default)
[26] DIS
[26] ENA (Default)

Enable alarm
No alarm prompts when the status of the primary input source changes
Enable alarm prompts when the status of the primary input source changes

Overload bypass: When enabled, the

[27] DIS

When disabled, the unit will not transfer to Utility mode

27

unit will transfer to line mode if
overload occurs in battery mode.

[27] ENA (Default)

When enabled, the unit will transfer to Utility mode if overload occurs in battery mode.

28

Maximum AC

[28]40A The range can be configured

Charging Current Default between 0-40A

[29] DIS Supply for industrial frequency

Default transformer (disabled)

29

Split Phase

[29] ENA

Supply for industrial frequency transformer (enabled)

Set point that recovers and

35

Low Voltage Disconnect
Recover

[35] 27V (Default)

reconnects the solar inverter from being disconnected in Low Voltage Disconnect. The range is from 20V

-27V, in 0.2V increments.

36

PV Charging Current

[36] 60A (Default)

Adjustable PV current settings. The range is from 0 ­ 60A.

When the battery reached at

floating status, it will need to be

37

Battery Charging Boost Return Setpoint

[37] 26V (Default)

lower than this setpoint before it starts charging. The range is the ( Undervoltage Warning ~

( Floating Voltage ­ 1.2V for

the respective battery

Allow to set to

38

AC output

38] 120Vac 100Vac/105Vac/110Vac/120Vac.

voltage setting (Default) The rated output power will be

reduced= (Power Rate)*(Vset/120)

Electronic Protections

Number 1
2 3

Protection PV Current/Power Limiting Protection
PV Night anti-charge protection
Overvoltage Protection

Description
When the configured PV array charge current exceeds the PV rated current, it will be charged at the rated current
At night, the battery is prevented from discharging through the PV component because the voltage of the battery is greater than the voltage of the PV component
Triggered when AC Input voltage reaches 140V

4

Power Input Undervoltage Protection

When utility input is below 90VAC, charging is stopped and the solar inverter is in inverter mode

When the battery voltage reaches the overvoltage

5

Battery Over-voltage disconnect point, the PV and the utility automatically

Protection

stop charging the battery, preventing damage from

overcharging the battery

When the battery voltage reaches the low voltage

6

Battery low-voltage protection

disconnect voltage point, the battery discharge is automatically stopped to prevent excessive

discharge of the battery from being damaged

When a short-circuit fault occurs at the load output,

7

Load output short-circuit protection

the output AC voltage is immediately turned off and outputs again after 1sec, for 3 more attempts. If they fail, then the unit will need to be manually powered

on

8

Over-temperature protection

When the internal temperature of the unit is too high, the it will stop charging and discharging

Output again after 3 minutes after overload

protection, overload 5 times in a row until the solar

9

Overload protection inverter charger is powered back, with

A table of technical parameters after reference to

the load level and duration of the manual

10

PV reverse polarity Protection against reversing PV input connection

11

Bypass Protection protection

Prevents battery power mode from inverting when bypass is active

12

Bypass Flow Protection

Built-in AC input overcurrent protection circuit breaker

13

Battery input overcurrent protection

When the battery discharge output current is greater than the maximum and lasts 1 minute, the AC input is loaded

When the battery is reversed or the inverter is

14

Battery input protection shorted inside, the internal battery input fuse of the

inverter fuses to prevent battery damage or fire

15

Charge short-circuit protection

The inverter protects and stops when the external battery port is shorted while the PV or AC is charging stop the output current

Fault code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 17 19 20 21 22 23 26 29

Fault Codes

Fault name
BatVoltLow BatOverCurrSw
BatOpen BatLowEod BatOverCurrHw BatOverVolt BusOverVoltHw BusOverVoltSw PvVoltHigh PvBuckOCSw PvBuckOCHw bLineLoss OverloadBypass OverloadInverter AcOverCurrHw
InvShort OverTemperMppt OverTemperInv
FanFail EEPROM ModelNumErr RlyShort BusVoltLow

Descriptin
Battery under-voltage alert Battery discharge current software protection Battery not detected Battery undervoltage stopdischarge alarm Battery overcurrent hardware protection Charge overvoltage protection Bus overvoltage hardware protection Bus overvoltage software protection PV overvoltage protection Buck Overcurrent Software Protection Buck Overcurrent Hardware Protection utility power down Side-by-side load protection inverter overload protection Inverted overcurrent hardware protection Inverter short-circuit protection Controller overtemperature protection inverter over temperature protection Fan failure Memory failure Model settings are wrong Error between AC output and bypass Internal battery boost circuit failure

Fault Screen not displaying

Solutions
as Make sure the battery is properly connected and charged to
be able to recognize the solar inverter. or click any button on the screen to exit screen sleep mode.

Rechargeable battery overvoltage protection

Measure whether the battery voltage exceeds 60Vand disconnect the photovoltaic array from and the power-on.

Battery undervoltage protection

Wait until the battery is charged to return to above the low voltage recovery voltage.

Fan failure

Check that the fan is not turning or is blocked by something else.

Over-temperature Protection

When the temperature of the equipment cools to, normal charge and discharge control is restored.

Overload Protection

(1) Reduce the use of electrical equipment;(2) restart the solar inverter charger and load recovery output.

Inverter short-circuit protection

Disconnect or reduce any loads from the unit. Shut down the solar inverter charger and turn on again to clear the error.

PV overvoltage Battery missed alert

Check with the meter if the PV input voltage is above the
maximum allowable input voltage of V operating voltag e . Check that the battery is not connected or that the battery side circuit breaker is not closed.

Maintenance
In order to maintain optimal long-term performance, it is recommended to perform inspections of the following items twice a year.
1.Make sure that the air flow around the solar inverter is not blocked and remove any dirt or debris from the radiator.
2.Check all terminals to see if there is corrosion, insulation damage, high temperature or combustion / discoloration signs, tighten the terminal screws.
Danger of electric shock! Make sure that all power supplies on solar inverter disconnected and that all capacitive power is released before checking or operating accordingly!

Technical Specifications

Model

POW-LVM3K-24V

Rated input Voltage

Utility/Grid 110/120Vac

Input voltage range

(90Vac~140Vac) ±2%

Frequency Frequency range Overload / Short circuit Protection

50Hz/ 60Hz (auto detect) 47±0.3Hz ~ 55±0.3Hz (50Hz); 57±0.3Hz ~65±0.3Hz (60Hz);
Breaker

Efficiency

95%

Conversion time (Bypass and reverse) 10ms

Reverse Flow Protection

Yes

Max Bypass Current load Waveform

40A Inverter
Pure Sine Wave

Rated Output (VA)

3000

Rated Output (W) Power factor Output AC Voltage

3000 1 120Vac

Unstable Input Error Output Frequency (Hz)

±5% 50Hz ±0.3Hz 60Hz ± 0.3Hz

Efficiency

92%

Overload protection
Peak power Motor Capability

For U model:
(102% < load <110%) ±10%: report error and turn off the output after 5 minutes; (110% < load < 125%) ± 10%: report error and turn off the output after 10 seconds; Load >125% ±10%: report error and turn off the output after 5 seconds;
6000W
2HP

Output Short-circuit Protection

Breaker

Bypass Breaker Specifications Rated Battery Voltage

40A 24V (Minimum starting voltage 22V)

Battery voltage range Power Saving Mode Self-Consumption No Load Self Consumption

20.0Vdc~33Vdc ± 0.6Vdc 50W 24W

Model

POW-LVM3K-24V

Battery type

Utility/Grid Charging Lead Acid or Lithium

Maximum Charging Current (AC)

40A

Unstable Condition Error

± 5Adc

Charging Voltage Range Short-circuit protection Circuit Breaker Specifications Overcharge Protection
Recommended PV Max

20 ­ 33Vdc Circuit breaker and blown fuse 40A Yes; Automatically alerts and then turns off charging after1 minute Solar (PV) Charging 100Vdc

PV Operating Voltage

30-100Vdc

MPPT Voltage Range

30-85Vdc

Battery Charging Range

20-33Vdc

Maximum Input Power Maximum Input Current Maximum Output Power PV Charging Current Range Short-circuit Protection

1600W 60A 1400W 0-60A Blown fuse

Wiring Protection

Reverse Polarity

Certifications

General FCC Part 15 Class B, RoHS

Operating Temperature

5°F ~ 131°F/ -15°C ~ 55°C

Storage Temperature

-13°F ~ 140°F / -25°C ~ 60°C

Humidity Noise Cooling

5% to 95% (three-layer paint protection) 60dB Fans

IP Grade Safety Class Dimensions (L-W-D) Weight

IP 20 I 14.9114.05 in / 378mm280mm103mm 14.96 lbs /6.8kg

Non-Lithium Battery Parameters

Battery type
Parameters Overvoltage disconnection voltage

Sealed lead acid battery
(SLD)
30.0V

Colloidal lead acid battery
(GEL)
30.0V

Vented lead acid battery
(FLD)
31.0V

User-defined (User)
1830V

Battery fully charged

26V

recovery point(setup item 37) (adjustable)

26V (adjustable)

26V (adjustable)

26V (adjustable)

Equalizing charge voltage

29.2V

–

29.6V

1830V

Boost charge voltage

28.8V

28.4V

29.2V

1830V adjustable)

Floating charge voltage

27.6V

Undervoltage alarm voltage (01 fault)

22.0V

Undervoltage alarm voltage recovery point(01 fault)
Low voltage disconnection voltage (04 fault)
Low voltage disconnection voltage recovery point (04 fault)(setup item 35)

21.0V 26V (adjustable)

Discharge limit voltage

20.0V

Over-discharge delay time

5S

27.6V 22.0V

27.6V 22.0V

1830V adjustable)
1830V adjustable)

Undervoltage alarm voltage+0.4V

21.0V 26V (adjustable) 20.0V 5S

21.0V 26V
(adjustable) 20.0V 5S

1830V adjustable)
26V (adjustable)
1830V adjustable)
1~30S adjustable)

Equalizing charge duration

120 minutes

–

120 minutes

0600 minutes adjustable)

Equalizing charge interval

30 days

–

30 days

0250 days adjustable)

Boost charge duration

120 minutes

120 minutes

120 minutes

10600
minutes adjustable)

When modifying parameters in User Mode, the following rules must be followed to

set parameters successfully.

1.Overvoltage Disconnect > Overvoltage Disconnect Recover

Equalization voltage Boost voltage Float voltage

2.Overvoltage Disconnect > Over Voltage Disconnect Recover

3.Low Voltage Disconnect Recover > Low Voltage Disconnect (at

least 2V Smaller) < Discharge Limit Voltage

4.Undervoltage Recover > Undervoltage Alarm

If setting the Low Voltage Disconnect in User Mode, it must always be

at least 2V lower than the Low Voltage Disconnect Recovery Voltage.

Lithium Battery Parameters

Battery type
Parameters Overvoltage disconnection voltage

Ternary lithium battery (N07)
31.6V

Ternary lithium battery (N08)
33V

Lithium iron
phosphat e battery
(LF07)
30V

Lithium iron
phosphat e battery
(LF08)

Lithium iron
phosphate battery (LF09)

30V

33V

Battery fully charged recovery 27.4V

30.4V

23.2V

26.8V

29.8V

point(setup item 37)

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Equalizing charge voltage

28.8V

31.6V

24.6V

28.4V

31.6V

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Boost charge voltage

28.8V

31.6V

24.6V

28.4V

31.6V

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Floating charge voltage

28.8V

31.6V

24.6V

28.4V

31.6V

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Undervoltage alarm voltage (01 fault)

23.4V

26.8V

21.6V

24.8V

27.8V

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Undervoltage alarm voltage recovery point(01 fault)

Undervoltage alarm voltage+0.4V

Low voltage disconnection 21.0V

24.0V

21.0V

24.4V

27.0V

voltage (04 fault)

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Low voltage disconn-ection voltage recovery point (04 fault) (setup item 35)

26V (adjustable)

29.6V (adjustable)

23.8V (adjustable)

27.2V

30.6V

(adjustable) (adjustable)

Discharge limit voltage

19.6V

22.4V

20.4V

23.2V

26.2V

Over-discharge delay time

30s

30s

30s

30s

30s

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

Equalizing charge duration

–

–

–

–

–

Equalizing charge interval

–

–

–

–

–

Boost charge duration

120

120

120

120

120

minutes minutes minutes minutes minutes

(adjustable) (adjustable) (adjustable) (adjustable) (adjustable)

When modifying parameters in User Mode or Lithium, the following rules must be

followed to set parameters successfully.

1. Overvoltage Disconnect > Overvoltage Disconnect Recover Equalization voltage Boost voltage Float voltage
2. Overvoltage Disconnect > Over Voltage Disconnect Recover

3. Low Voltage Disconnect Recover > Low Voltage Disconnect (at least 2V Smaller) < Discharge Limit Voltage

4. Undervoltage Recover > Undervoltage Alarm

If setting the Low Voltage Disconnect in User Mode, it must always be

at least 2V lower than the Low Voltage Disconnect Recovery Voltage

Charging Parameters Glossary
Overvoltage Disconnect–When and if the charge controller experiences a voltage higher than what is assigned, it will disconnect itself from the circuit; ceasing charge.
Overvoltage Recover– in the event a charge controller experiences an over- voltage condition set by the previous parameter, then this reconnecting parameter is put into play to direct the controller when it can connect and safely charge again. Typically over-voltage reconnection is achieved when time has passed (ex. The sun setting), or when the overvoltage condition is remedied ultimately reducing the voltage to a user defined charging voltage.
Equalization Voltage– equalization voltage is a corrective over-charge of the battery. The user should consult their battery manufacturer regarding specific battery equalization capacity. This parameter sets the equalization voltage to set the battery at when it reaches the equalization state.
Boost Voltage– users should check with their battery manufacturer for proper charging parameters. In this stage, users set the boost voltage where the battery will reach a voltage level and remain there until the battery undergoes an absorption stage.
Float Voltage– once the charge controller recognizes the set float voltage, it will commence floating. The battery is supposed to be fully charged in his state, and the charge current is reduced to maintain battery stability levels.
Undervoltage Recover– deals with the loads connected to the system. When batteries are determined to be low due to them approaching low voltage disconnect, then the loads will be shut off to give the batteries time to recover. This parameter sets the controller to shut off the loads until it can reach the low voltage reconnect stage.
Undervoltage Alarm– this parameter deals with the batteries themselves approaching the under-voltage recovery state. The user should minimize loads before the charge controller approaches a level where it will do this automatically to protect the battery from discharging.
Low Voltage Recover– parameter allows loads connected to the system will be able to operate (not fully) again.
Low-voltage disconnect– prevents over-discharge of the batteries by automatically disconnecting any loads. This extends battery life and is the precedent to being in an under-voltage state, recovering from the undervoltage state, and finally reconnecting to normal operational state.
Discharging limit Voltage– This parameter ensures that the controller does not exceed the default or assigned parameter before needing to be charged again. This is put into play to optimize and extend the battery life by going with a higher voltage. The lower the

discharge limit voltage the more negative effect on battery efficiency
This equipment has been tested and found to comply with the limits for a class Bdigital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected. Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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