DISCOVER 48-48-5120-H Energy Storage System Instruction Manual

LYNK II
(950-0025)
SUNSYNK MANUAL

READ AND SAVE THESE INSTRUCTIONS
805-0076 REV A

INTRODUCTION

This Application Note provides information about integrating LYNK and AEbus network-enabled Discover Lithium Batteries using the LYNK II Communication Gateway with SUNSYNK power conversion devices.

AUDIENCE, WARNINGS, MESSAGES, GENERAL SAFETY, PERSONAL PROTECTIVE

EQUIPMENT

1 .1 Audience
Configuration, installations, service, and operating tasks should only be performed by qualified personnel in consultation with local authorities having jurisdiction and authorized dealers. Qualified personnel should have training, knowledge, and experience in  the:

• Installation of electrical equipment
• Application of electrical codes, safety, and installation standards
• Analysis and reduction of hazards involved in performing electrical work
• Installation and configuration of batteries
• Installation and configuration of systems activated by relays

1 .2 Warning, Caution, Notice, and Note Messages
Messages in this manual are formatted according to this structure.

| Additional information concerning important procedures and features of the product. Read all the  instructions before installation, operation, and maintenance.
---|---
| Important information regarding hazardous conditions.

WARNING
Important information regarding hazardous conditions that may result in personal injury or death.

CAUTION
Important information regarding hazardous conditions that may result in personal injury.

NOTICE
Important information regarding conditions that may damage the equipment but not result in personal injury.

NOTE
Ad hoc information concerning important procedures and features unrelated to personal injury or equipment damage.

1 .3 General Warnings
WARNING
ELECTRIC SHOCK AND FIRE HAZARD

• This equipment must only be installed as specified.
• Do not disassemble or modify the battery.
• If the battery case has been damaged, do not touch exposed contents.
• There are no user-serviceable parts inside.

Failure to follow these instructions may result in death or serious injury.

WARNING
ELECTRIC SHOCK AND FIRE HAZARD
Do not lay tools or other metal parts on the battery or across the terminals.
Failure to follow these instructions may result in death or serious injury.

CAUTION
ELECTRIC SHOCK

• Do not touch the energized surfaces of any electrical component in the battery system.
• Before servicing the battery, follow all procedures to fully de-energize the battery system.
• Follow the “Safe Handling Procedures” below when working with the battery.

Failure to follow these instructions may result in injury.

1 .4 Safe Handling Procedures
Before using the battery and any power electronics, read all instructions and cautionary markings on all components and appropriate sections of their manuals.

• Use personal protective equipment when working with batteries.
• Do not dispose of the battery in a fire.
• Promptly dispose of or recycle used batteries following local regulations.
• Do not disassemble, open, crush, bend, deform, puncture, or shred.
• Do not modify, re-manufacture, or attempt to insert foreign objects into the battery, immerse or expose the battery to water or other liquids, fire, explosion, or other hazards. If the user suspects damage to the battery module due to water, heat, or other  reason, take it to a service center for inspection.
• Only use the battery for the system for which it is specified.
• Do not lift or carry the battery while in operation.
• When lifting a heavy battery, follow the appropriate standards.
• Only lift, move, or mount following local regulations.
• Take care when handling battery terminals and cabling.
• Only use the battery with a charging system that meets specifications. Using a battery or charger that does not meet specifications may present a risk of fire, explosion, leakage, or other hazards.
• Do not short-circuit a battery or allow metallic conductive objects to contact battery terminals.
• Replace the battery only with another battery that has been qualified for the system. Using an unqualified battery may present a risk of fire, explosion, leakage, or other hazards.
• Do not drop the device or battery. If the device or battery is dropped, especially on a hard surface, and the user suspects damage, take it to a service center for inspection.

1 .5 Personal Protective Equipment
When handling or working near a battery:

• Use Personal Protective Equipment, including clothing, glasses, insulated gloves, and boots.
• Do not wear rings, watches, bracelets, or necklaces.

DOCUMENTATION

This Application Note provides information about integrating LYNK and AEbus network-enabled Discover Lithium Batteries using the LYNK II Communication Gateway with SUNSYNK power conversion devices in a managed (closed-loop) configuration.
Before installation and configuration, consult the relevant product documentation, including Manuals, Application Notes, Installation and Configuration Guides.

SUNSYNK Documentation

• SUNSYNK SINGLE-PHASE HYBRID INVERTER USER MANUAL
• SUNSYNK SINGLE-PHASE HYBRID INVERTER INSTALLER MANUAL
• SUNSYNK HYBRID PARITY (SUPER) INVERTER INSTALLER MANUAL
• SUNSYNK THREE-PHASE HYBRID INVERTER INSTALLER MANUAL
• SUNSYNK MAX USER MANUAL

Visit https://www.SUNSYNK.org/ for the most recent version of published documents.

Discover Energy Systems Documentation

• AES 42-48-6650 LiFePO4 Installation and Operation Manual (805-0065)
• AES LiFePO4 datasheet (808-0004)
• AES RACKMOUNT Installation and Operation Manual (805-0043)
• AES RACKMOUNT datasheet (808-0039)
• LYNK II Installation and Operation Manual (805-0033)

Visit https://www.discoverlithium.com for the most recent version of published documents.

OVERVIEW

This manual provides general settings and is not a comprehensive guide to the programming and configuration of a specific installation. An installation may have unique conditions or use cases that require modification or adaptations of values. Installers must  be capable of reviewing and adapting to the specifics of an installation and its specific use case and optimizing settings where needed.
The key steps required to install and configure the LYNK II Communication Gateway with compatible Discover Lithium batteries and power conversion equipment are as follows:

• Review and confirm equipment compatibility and correct sizing.
• Configure the LYNK II CAN out pins to match the CAN in pins of the power conversion equipment.
• Mount the LYNK II, connect the Discover battery communication network to either the LYNK Port or AEbus Port, and then connect the CAN Out Port to the power conversion equipment’s communication network.
• Terminate all networks correctly.
• Set the LYNK II using LYNK ACCESS software to the correct protocol to enable managed (closed-loop) communication between the Discover batteries and the power conversion equipment.
• Set up the managed (closed-loop) configuration parameters on the power conversion equipment.
• Set up user preferences and enable the use case using the power conversion control system.

3 .1 System Overview
The LYNK II Communication Gateway unlocks the full potential of a Discover Lithium battery by enabling the internal Battery Management System (BMS) to provide real-time data in a managed (closed-loop) configuration to other devices.
Managed (closed-loop) communication allows inverter-chargers and solar charge controller systems to optimize their control over the charging process in solar applications. LYNK II also enables the remote monitoring of Discover Lithium battery SOC and data  logging of multiple sites using the data monitoring services offered by off-grid inverter systems.
Discover Lithium batteries must be set up to work with power conversion and monitoring devices in either a self-managed (open-loop) or managed (closed- loop) configuration.
Discover Lithium battery charge and discharge settings in a self-managed (openloop) configuration are set up manually through the controller for the power conversion device at installation time. Refer to A.1 Self-Managed (Open- Loop) Configuration.
In a managed (closed-loop) configuration, the BMS of the Discover Lithium battery sends the battery status over a network data connection with the power conversion device. Power conversion devices use the Discover Lithium battery BMS data to fine tune the  output of their charger and deliver other functional controls based on battery voltage, temperature, and percent State- of-Charge.

3 .2 Compatibility
Discover Lithium Batteries
A Discover battery must have a compatible network port, such as a LYNK Port or AEbus Port, for communicating with a LYNK II device.

• AES LiFePO4: 42-48-6650
• AES RACKMOUNT: 48-48-5120, 48-48-5120-H

SUNSYNK Inverters
The LYNK II Communication Gateway is compatible with the following SUNSYNK devices:

Single Phase

• SUNSYNK-3K-SG04LP1
• SUNSYNK-3.6K-SG04LP1
• SUNSYNK-5K-SG04LP1
• SUNSYNK-8K-SG05LP1
• SUNSYNK-12K-SG01LP1
• SUNSYNK-14K-SG01LP1
• SUNSYNK-16K-SG01LP1
• SUNSYNK MAX

Three Phase

• SUNSYNK-8K-SG04LP3
• SUNSYNK-10K-SG04LP3
• SUNSYNK-12K-SG04LP3

3 .3 Minimum Battery System Capacity
The Discover Lithium Battery and SUNSYNK device automatically manage the battery charge and discharge rates. Using large solar arrays with battery banks that are too small can exceed the operating limits of the battery to charge and possibly lead to the BMS  triggering over-current protection. Battery capacity must accept the maximum charge current of the system, or charging must be curtailed below the operating limit of the installed batteries. Derive this value by adding together the charge capacities of all inverter-chargers and solar charge controllers in the system.
Additionally, battery peak capacity must support the surge requirements demanded by the load attached to the inverter-charger. Match all inverter- charger peak power values with the sum of all battery peak current values.

Inverter Peak = (Inverter Surge Value) / (Inverter Efficiency) / (48V: Low Battery Cut-Off)

Single-Phas e Models| I nv e rt e r P ea k ( 1 0 seconds)| Max Continuous Cha r g e| Max Continuous Dis c ha r g e| AE S LiFePO 4
42-48-6650
Minimu m per  inverte r (5)| AES RACKMOUNT
48-48-5120/ 48-48-5120-H Minimu m per i nv e rt e r (6)
---|---|---|---|---|---
SUNSYNK-3K-SG04LP1| 128 A (1)| 70 ADC| 70 ADC| 1| 1
SUNSYNK-3.6K-SG04LP1| 154 A (1)| 90 ADC| 90 ADC| 1| 1
SUNSYNK-5K-SG04LP1| 213 A (1)| 120 ADC| 120 ADC| 1| 2
SUNSYNK-8K-SG05LP1| 342 A (2)| 190 ADC| 190 ADC| 2| 2
SUNSYNK-12K-SG01LP1| 518 A (3)| 220 ADC| 220 ADC| 2| 3
SUNSYNK-14K-SG01LP1| 604 A (3)| 250 ADC| 250 ADC| 2| 3
SUNSYNK-16K-SG01LP1| 691 A (3)| 290 ADC| 290 ADC| 3| 4
SUNSYNK MAX| 687 A (4)| 300 ADC| 300 ADC| 3| 4

(1) Calculated based on the surge power and efficiency CEC as published in SUNSYNK Hybrid Parity (Super) Inverter Datasheet SUNSYNK-3K-SG04LP1 / SUNSYNK-3.6K-SG04LP1 / SUNSYNK-5K-SG04LP1 (version 14, 05/09/22).
(2) Calculated based on the surge power and efficiency CEC as published in SUNSYNK Hybrid Parity (Super) Inverter Installer Manual SUNSYNK-8K-SG05LP1 (version 16, 10/04/22).
(3) Calculated based on the surge power and efficiency CEC as published in SUNSYNK Single-Phase Hybrid Inverter Datasheet SUNSYNK-12K-SG01LP1 / SUNSYNK- 14K-SG01LP1 / SUNSYNK-16K-SG01LP1 (version 1, 09/22/23).
(4) Calculated based on the surge power and efficiency CEC as published in SUNSYNK MAX User Manual (version 11, 04/04/23).
(5) Discover AES LiFePO4 42-48-6650 Battery, Peak Discharge Current: 300 A (3 seconds), 130 A DC Continuous Charge/ Discharge, as published in Discover LiFePO4 42-48-6650 Installation and Operation Manual (805-0065 Rev A).
(6) Discover AES RACKMOUNT 48-48-5120/48-48-5120-H Battery, Peak Power: 218 A RMS (3 seconds), 95 A DC Continuous Charge/Discharge, as published in Discover AES RACKMOUNT Installation and Operation Manual (8050043 Rev E).

Inverter Peak = (Inverter Surge Value) / (Inverter Efficiency) / (48V: Low Battery  Cut-Off)

Th r ee-Phas e Models| I nv e rt e r P eak
( 1 0 seconds)| Max Continuous  Cha r g e| Max Continuous  Dis c ha r g e| AE S LiFePO 4
42-48-6650
Minimu m per  inverte r (2)| AES RACKMOUNT
48-48-5120/ 48-48-5120-H Minimu m per i nv e rt e r (3)
---|---|---|---|---|---
SUNSYNK-8K-SG04LP3| 342 A (1)| 190 ADC| 190 ADC| 2| 2
SUNSYNK-10K-SG04LP3| 427 A (1)| 210 ADC| 210 ADC| 2| 3
SUNSYNK-12K-SG04LP3| 512 A (1)| 240 ADC| 240 ADC| 2| 3

(1) Calculated based on the surge power and efficiency CEC as published in the SUNSYNK Three-Phase Hybrid Inverter Datasheet SUNSYNK 8K-SG04LP3 / SUNSYNK 10K-SG04LP3/ SUNSYNK 12K-SG04LP3 (version 14, 05/09/22).
(2) Discover AES LiFePO4 42-48-6650 Battery, Peak Discharge Current: 300 A (3 seconds), 130 A DC Continuous Charge/ Discharge, as published in Discover LiFePO4 42-48-6650 Installation and Operation Manual (805-0065 Rev A).
(3) Discover AES RACKMOUNT 48-48-5120/48-48-5120-H Battery, Peak Power: 218 A RMS (3 seconds), 95 A DC Continuous Charge/Discharge, as published in Discover AES RACKMOUNT Installation and Operation Manual (8050043 Rev E).

LYNK II CAN HARDWARE TERMINATION AND CAN OUT PIN CONFIGURATION

4 .1 LYNK II CAN Termination

NOTE
Disconnect power and all connections to LYNK II before attempting to configure header jumpers.

Jumpers are used to configure termination for the AEbus or LYNK Network, and the CAN Out pin assignments. Follow the LYNK II Installation and Operation Manual (805-0033) to learn how to access and configure the header board with jumpers.
Detailed pin configurations are included in the LYNK II User Manual but are repeated here for convenience.

NOTE
LYNK II terminates the AEbus and LYNK Network by default. Do not remove the termination jumper inside LYNK II unless instructed to do so by Discover Energy Systems.

4 .2 LYNK II CAN Out – RJ45 PIN Assignments for SUNSYNK Inverters
CAN signals (CAN H, CAN L, CAN GND) can be assigned to any pin of the RJ45 connector on the LYNK II by adjusting the jumpers on the header board.

INSTALLING AND CONNECTING LYNK II TO THE SUNSYNK NETWORK

5 .1 Networking Discover Lithium Batteries with LYNK II

NOTE

• Turn OFF all devices before connecting cables.
• Do not plug an AEbus RJ45 network cable or terminator into the 10/100 Ethernet port of the LYNK II.
• Do not connect a CAT5 or higher cable from the AEbus, LYNK, or Ethernet ports of the LYNK II to a WAN or MODEM port of a network router.
• Mixing the LYNK Network with other networks may result in equipment malfunction and damage.

NOTE
Unless Discover Energy Systems specifies, power electronics must not be connected directly to the LYNK or AEbus network.

Refer to the LYNK II Installation and Operation Manual (805-0033) for detailed instructions on network layouts, connections, and terminations for compatible Discover Lithium battery models. Some key reminders are provided in this manual.

• At least one battery must be connected to the LYNK Port or AEbus Port on LYNK II.
• A network of batteries will communicate as one battery.
• No more than one network of batteries may be connected to LYNK II.
• Network termination is required for the system’s proper functioning – note some batteries and devices may auto-terminate.
• LYNK II requires power. There are three possible sources: a 13-90 VDC power supply, AEbus Port or LYNK Port-enabled Discover Lithium battery, or a USB device.
• Discover Lithium batteries must be set to ON to supply power and communicate data with LYNK II.

AES LiFePO4 batteries are not internally terminated. The LYNK II communication gateway is internally terminated. When using LYNK II with an AEbus network, install a terminator at the end opposite LYNK II.

NOTE
AES LiFePO4 48 V batteries sold before Jan 1, 2020, will not supply power to LYNK II using the network cable connection. An external 13-90 VDC power source connected to the Phoenix 12-pin connector on LYNK II is REQUIRED for the AES LiFePO4 batteries listed below.

• 42-48-6650 with a serial number before DET424820275xxxx

Both LYNK II and AES RACKMOUNT Battery Modules are internally terminated. No extra termination is required.

5 .2 Connecting LYNK II to the SUNSYNK Network
Before connecting LYNK II to the SUNSYNK network, confirm that the CAN out pins on the LYNK II are configured correctly. Refer to 4. LYNK II CAN Hardware Termination and CAN Out PIN Configuration.
Insert one end of a CAT5 or higher communication cable into the LYNK II CAN out port and the other end into the correct CAN port of the SUNSYNK inverter- charger.

ENABLING LYNK II TO COMMUNICATE WITH SUNSYNK DEVICES

When properly connected to a managed (closed-loop) network and set to use the SUNSYNK protocol, LYNK II will transmit real-time parameters from the Discover Lithium battery, including voltage, current, temperature, state of charge, and fault conditions to  a SUNSYNK inverter-charger. LYNK II will also transmit charge voltage and current requests from the Discover Lithium battery to a SUNSYNK invertercharger.
LYNK ACCESS software for 64-bit Windows 10 / 11 is required to configure LYNK II settings for managed (closed-loop) CAN communication with SUNSYNK inverterchargers.
If there is a break in communication between the LYNK II and inverter-charger for more than ten seconds, the inverter-charger will safely stop operation, so long as the BMS Lithium Batt and the BMS_Err_Stop parameters are both enabled on the SUNSYNK  inverter-charger. The inverter-charger will display an F58 BMS Communication Fault if communication is lost. The SUNSYNK inverter-charger will check every five minutes and resume managed (closed-loop) operation if communication is re-established.  However, if communication cannot be reestablished, you may have to manually convert the SUNSYNK inverter-charger to a self-managed (open-loop) configuration to resume operation. Refer to A.1 SelfManaged (Open-Loop) Configuration.

NOTE

• In a managed (closed-loop) configuration with the BMS Lithium Batt function enabled, the BMS_Err_Stop parameter must be enabled. If the BMS_Err_Stop parameter function is not enabled, the SUNSYNK inverter-charger will continue to operate based  on the last communicated battery values. Depending on the mode of operation at the time of communication fault, and given enough time, the SUNSYNK inverter-charger will eventually put the attached battery into an overcharged or fully discharged state. When that occurs, either situation will trigger the Discover Lithium Battery BMS to self-protect and disconnect the battery from the system.
• Neither Discover Lithium batteries nor LYNK II directly control SUNSYNK relay functions, generator starting or other grid-interactive features. These functions are controlled through the programming of the SUNSYNK inverter-charger.

6 .1 Setting SUNSYNK Managed (Closed-Loop) Configuration
6.1.1 Setting the LYNK II Communication Protocol for SUNSYNK Set the LYNK II communication protocol and configure managed (closed loop) on the SUNSYNK inverter-charger.

LYNK II Protocol

1. Download the current version of LYNK ACCESS software from the Discover Energy Systems website to obtain the most up-to-date suite of available protocol configurations.

2. Using a USB cable with a Type-B mini-plug, connect the 64-bit Windows 10 / 11 device running LYNK ACCESS software to the USB port on LYNK II. Ensure LYNK
   II is powered and connected to the correct SUNSYNK COM port. Refer to Figure

3. SUNSYNK CANopen Connection.
   

4. Open LYNK ACCESS. Options for configuration and settings are found by selecting the LYNK tab.

5. Connect the LYNK II and open LYNK ACCESS. Ensure that you only have one LYNK device connected to the computer.

6. Open LYNK ACCESS and select the LYNK tab. Select the blue gear icon in the upper right area of the CAN Settings tile.

7. Select the pre-configured SUNSYNK protocol to complete the managed (closedloop) configuration for LYNK II. Click SAVE to confirm the configuration.

NOTE
Saving configuration changes using LYNK ACCESS will automatically cause LYNK II to shut down and restart.

6.1.2 Setting Managed (Closed-Loop) Configuration on the SUNSYNK Inverter- Charger

NOTE
In a managed (closed-loop) configuration with the BMS Lithium Batt function enabled, the BMS_Err_Stop parameter must be enabled. If the BMS_Err_Stop parameter function is not enabled, in the event of a communication error, the SUNSYNK  invertercharger will continue to operate based on the last communicated battery values.
Depending on the mode of operation at the time of communication fault and given enough time, the SUNSYNK inverter-charger will eventually put the attached battery into an overcharged or fully discharged state. When that occurs, either situation will trigger  the Discover Lithium Battery BMS to self-protect and disconnect the battery from the system.

After selecting the SUNSYNK communication protocol for the LYNK II, complete the managed (closed-loop) configuration settings on the SUNSYNK inverter- charger.
Ensure the Discover Lithium Batteries are networked with LYNK II and that the LYNK II is connected to the SUNSYNK CAN port.

If necessary, first configure SUNSYNK inverter-chargers to operate in parallel by establishing the inverter-charger master/slave relationships and phase designations before setting the parameters for battery operation. Configuring the master invertercharger will  cascade parameters and settings to the slave inverter-chargers.

Managed (Closed-loop) Configuration
Refer to the latest Discover Energy Systems documentation for battery values and the latest SUNSYNK documentation for menu navigation and details on the setup procedure.

1. Set the Discover Lithium batteries to ON and set the inverter-charger to ON.
2. Using the touch screen and keypad on the inverter-charger, navigate to Main Screen > System Setup > Battery Setup.
3. Specify the battery settings according to the instructions in the table that follows.
4. Touch the OK button to save changes.
5. Exit and restart the inverter-charger.

NOTE
If using multiple inverter-chargers, configure SUNSYNK inverter-chargers to operate in parallel before setting the battery operation parameters.

Managed (Closed Loop) – Batt Type

All values and parameters assume an operating temperature of 25 °C.

Ba t t  type

Batt type| Select the Lithium option to display Lithium battery associated settings.
Activate| Select this  check box.
Batt Capacity| These settings are handled by the BMS.
Charge Amps
Discharge Amps
CAN RS485| Select the CAN option and  specify 0 for the Protocol.
BMS_Err_Stop| Select this check box to cause the inverter-charger to stop operating if there is a  communication error.
If the BMS_Err_Stop check box is cleared, despite a communication error, the inverter- charger will continue to operate using the last communicated battery values which will  eventually cause the batteries to invoke protection.

Appendix

A .1 Self-Managed (Open-Loop) Configuration
The SUNSYNK inverter-charger will need to be manually converted to a selfmanaged (open-loop) configuration if managed (closed-loop) communication cannot be established. Refer to the latest Discover Lithium battery documentation for battery values and  the latest SUNSYNK documentation for details on menu navigation and the setup procedure.

1. Set the Discover Lithium batteries to ON and set the inverter-charger to ON.
2. Using the touch screen and keypad on the inverter-charger, navigate to Main Screen > System Setup > Battery Setup.
3. Specify the battery settings according to the instructions in the tables that follow.
4. Touch the OK button to save changes.
5. Exit and restart the inverter-charger.

NOTE
If using multiple inverter-chargers, configure SUNSYNK inverter-chargers to operate in parallel before setting the parameters for battery operation.

A.1.1 Self-Managed (Open-Loop) — Batt Type
The SUNSYNK inverter-charger will operate in a self-managed (open-loop) configuration using voltage-based parameters if the BMS Lithium Batt parameter is disabled and the AGM V parameter is enabled.

All values and parameters assume an operating temperature of 25 °C.

Ba t t  type

Batt type| Select the AGM V option.
Lithium (1) : For connecting a Lithium battery in a managed (closed-loop) configuration.
AGM V: Use battery voltage for all the settings in a selfmanaged (open-loop) configuration.
AGM %: Use battery SOC for all the settings in a selfmanaged (open-loop) configuration.
No batt: Option when no battery is connected to the system.
Activate| Select this  check box.
Batt Capacity| Set to the number of Discover Lithium batteries x Ah  capacity of each. For  example, set to 300 Ah  (3 x 100 Ah)  for three AES RACKMOUNT 48-48-5120 batteries.
Charge Amps| For  a single inverter-charger, set to the lesser of the inverter- charger’s maximum charge rate or the quantity of attached batteries multiplied by the battery’s maximum charge rating. For  example, set the 8K- SG05LP1 inverter-charger to the lesser of the inverter-charger’s maximum charge rate of 190 A, or 285 A for three AES RACKMOUNT 48-48-5120 batteries that are each  rated  at a maximum charge rate of 95 A (3 x 95 A = 285 A). (2)
For  a three-phase system with  three  inverter-chargers, set to the lesser value between the  master inverter-charger’s maximum charge rate and  the quantity of attached batteries  multiplied by the battery’s maximum charge rate divided by the number of inverter-chargers.  For  example, set the 8K- SG04LP3 inverter-charger to the lesser of the inverter- charger’s  maximum charge rate of 190 A, or 126 A for four AES RACKMOUNT 48-48-5120 batteries that  are each rated at a maximum charge rate of 95 A (4 x 95 A=380 A divided by three  inverter- chargers).
Discharge Amps| For  a single inverter-charger, set to the lesser of the inverter- charger’s maximum discharge rate or the quantity of attached batteries multiplied by the battery’s maximum discharge rating. For  example, set the 8K-SG05LP1 inverter-charger to the lesser of the inverter-charger’s maximum discharge rate of 190 A, or 285 A for three AES RACKMOUNT 48-48-5120 batteries that are  each rated  at a maximum discharge rate of 95 A (3 x 95 A = 285 A).
For  a three-phase system with  three  inverter-chargers, set to the lesser value between the  master inverter-charger’s maximum discharge rate or the quantity of attached batteries  multiplied by the battery’s maximum discharge rate divided by the number of inverter-chargers.  For  example, set the 8K- SG04LP3 inverter-charger to the lesser of the inverter- charger’s  maximum discharge rate of 190 A, or 126 A for four AES RACKMOUNT 48-48-5120 batteries that are each rated  at a maximum discharge rate of 95 A (4 x 95 A=380 A divided by three   inverter-chargers).
TEMPCO| Set to 0 mv/C/Cell. (3)

(1) Set Disable for the Lithium parameter to disable BMS communication. Additionally, self-managed communication (open loop) requires clearing the BMS_Err_Stop check box in the Advanced Function screen.
Setting Enable for the Lithium parameter enables BMS communication and managed (closed-loop) communication with supported batteries.
(2) SUNSYNK’s recommended maximum battery value for Charge Amps is 75% of the battery’s rated maximum charge current.
(3) Discover Lithium batteries do not require temperature compensation. Setting TEMPCO to 0 mv/C/Cell disables inverter-charger controlled temperature compensation.

A.1.2 Self-Managed (Open Loop) – Batt Charge

All values and parameters assume an operating temperature of 25 °C.

Ba t t  charge

Amps| The  field  on the left-hand side defines the charge amps from the attached generator.
The  field  on the right-hand side defines the charge amps from the grid.
Set to the same number of amps as the maximum charge current. (1)
Gen Charge| Select this  check box if charging the battery bank from an attached generator. (2)
A Gen Input Breaker must be connected to the output of an AC generator for this  work.
Gen Signal| Normally open relay that closes when the Gen Start signal state is active.
Gen Force| When the generator is connected, you  can  force the generator to start  without meeting other  conditions.
Signal ISLAND MODE| When this  option is selected and  the inverter-charger is connected to the grid, the ATS port voltage is 0.
When Signal ISLAND MODE is selected and  the inverter- charger is not connected to the grid, the  ATS port voltage outputs 230 Vac.
Using this  feature along with  a NO  relay, you  can  disconnect or bond the neutral (N) and   protective earth  (PE) wires in an electrical circuit.
Grid Charge| Select this  check box if charging from the grid. (3)
A Grid Input Breaker must be connected to input from the grid for this  to work.
Grid Signal| This signal indicates when the grid should no longer charge the battery.
Float V
Absorption V
Equalization V| Set the suggested voltage values defined in the associated battery manual.
Discover Lithium batteries must not be equalized. Setting zero hours ensures the batteries will not  be equalized.

(1) If need be, this value is used to curtail the maximum current output of the charger.
(2) The options in the left column are for Generator Charge AutoStart values. Refer to SUNSYNK documentation for information on using the Generator AutoStart function.
(3) The options in the right column are for Grid Charge values.

A.1.3 Self-Managed (Open Loop) – Shutdown

All values and parameters assume an operating temperature of 25 °C.

Shu t D o wn| AE S Li F ePO4
42-48-6650
(9 00-0034)| AE S R A CKMOUNT
48-48-512 0 / 48-48-5120-H
(900-0062) / (900-0067)
---|---|---
Shut Down
Low Batt
Restart| 48 V
50 V
52 V| 48 V
50 V
52 V

References

• Lithium LiFePO4 Battery Manufacturers/Suppliers | Discover Energy Systems

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