Deye 950-0025 Discover Lithium Batteries Instruction Manual

: June 6, 2024
: Deye

Table of Contents

Deye 950-0025 Discover Lithium Batteries
Product Information
Product Usage Instructions
INTRODUCTION
DOCUMENTATION
OVERVIEW
LYNK II CAN HARDWARE TERMINATION AND CAN OUT PIN CONFIGURATION
INSTALLING AND CONNECTING LYNK II TO THE DEYE NETWORK
ENABLING LYNK II TO COMMUNICATE WITH DEYE DEVICES
APPENDIX
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Deye 950-0025 Discover Lithium Batteries

Specifications

Model Number: 950-0025
Product Name: DEYE MANUAL
Revision: 805-0084 REV A

Product Information

The DEYE MANUAL provides information about integrating LYNK and AEbus network- enabled Discover Lithium Batteries using the LYNK II Communication Gateway with Deye power conversion devices.

Product Usage Instructions

Audience, Warnings, and Safety

Audience: All users should read the instructions before installation, operation, and maintenance.
Warning, Caution, Notice, and Note Messages: Different messages indicate important procedures and features, hazardous conditions, personal protective equipment, and more.

Documentation:
Before installation and configuration, consult the relevant product documentation available on the Deye website. Ensure to review Manuals, Application Notes, Installation, and Configuration Guides.

Overview:
The manual provides general settings for integrating Discover Lithium batteries with power conversion devices. It is not a comprehensive guide but outlines key steps required for installation and configuration.

System Overview
Discover Lithium batteries can be set up in open-loop or closed-loop configurations. Charge and discharge settings for open-loop configuration are done manually through the controller at installation time.

Frequently Asked Questions (FAQ):

Q: Where can I find the most recent version of Deye Documentation?
A: You can visit https://www.deyeinverter.com/ for the latest published documents.

(950-0025)
DEYE MANUAL
READ AND SAVE THESE INSTRUCTIONS

INTRODUCTION

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

AUDIENCE, WARNINGS, MESSAGES, GENERAL SAFETY, PERSONAL PROTECTIVE EQUIPMENT

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

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.

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.

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.

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 Deye power conversion devices in a closed-loop configuration.
Before installation and configuration, consult the relevant product documentation, including Manuals, Application Notes, Installation and Configuration Guides.

Deye Documentation
Visit https://www.deyeinverter.com/ for the most recent version of published documents.

Deye Hybrid Inverters Single-Phase – Low Voltage
SG01 Series

SG02 Series

UN-7.6/8/10/12K-SG02LP1-EU-AM2/AM3 | 7.6-12kW | Single Phase | 2 MPPT | Hybrid Inverter | LV Battery Supported

SG03 Series

SUN-3/3.6/5/6K-SG03LP1-EU | 3.6-6kW | Single Phase | 2 MPPT | Hybrid Inverter | LV Battery Supported

SG04 Series

SG05 Series

Deye Hybrid Inverters Split-Phase / Three-Phase – Low Voltage SG02

SG05 Series

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

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

AES RACKMOUNT Installation and Operation Manual (805-0043)
AES RACKMOUNT datasheet (808-0039)
LYNK II Installation and Operation Manual (805-0033)

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 closed-loop communication between the Discover batteries and the power conversion equipment.
Set up the closed-loop configuration parameters on the power conversion equipment.
Set up user preferences and enable the use case using the power conversion control system.

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 closed-loop configuration to other devices. 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 open-loop or closed-loop configuration.
Discover Lithium battery charge and discharge settings in a open-loop configuration are set up manually through the controller for the power conversion device at installation time. Refer to A.1 Deye Open-loop Configuration.
In a 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.

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 RACKMOUNT: 48-48-5120, 48-48-5120-H

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

Single Phase

SUN-5/6/7.6/8K-SG01LP1-US
SUN-7.6/8/12/14/16K-SG01LP1-EU
SUN-7.6/8/10/12K-SG02LP1-EU-AM2/AM3
SUN-3.6/5/6K-SG03LP1-EU
SUN-3/3.6/5/6K-SG04LP1-EU
SUN-3.6/5/6/7.6/8K-SG05LP1-EU

Split Phase / Three Phase

SUN-5/6/7.6/8/10/12K-SG02LP2-US-AM2/AM3

Three Phase

SUN-5/6/8/10/12K-SG04LP3-EU
SUN-3/4/5/6/8/10/12K-SG05LP3-EU-SM2

Minimum Battery System Capacity
The Discover Lithium Battery and Deye 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-Phase Models

| Inverter Peak (10 seconds)| Max Continuous Charge| Max Continuous Discharge| AES RACKMOUNT

48-48-5120/ **48-48-5120-H**

Minimum per inverter (7)

---|---|---|---|---
SG01 Series
SUN-5K-SG01LP1-US| 213 A (1)| 120 A| 120 A| 2
SUN-6K-SG01LP1-US| 256 A (1)| 135 A| 135 A| 2
SUN-7.6K-SG01LP1-US/EU| 324 A (1)| 190 A| 190 A| 2
SUN-8K-SG01LP1-US/EU| 342 A (1)| 190 A| 190 A| 2
SUN-12K-SG01LP1| 512 A (2)| 220 A| 220 A| 3
SUN-14K-SG01LP1| 598 A (2)| 250 A| 250 A| 3
SUN-16K-SG01LP1| 683 A (2)| 290 A| 290 A| 4
SG02 Series
UN-7.6K-SG02 LP1-EU-AM2| 324 A (3)| 190 A| 190 A| 2
SUN-8K-SG02 LP1-EU-AM2| 342 A (3)| 190 A| 190 A| 2
SUN-10K-SG02 LP1-EU-AM3| 427 A (3)| 220 A| 220 A| 3
SUN-12K-SG02 LP1-EU-AM3| 512 A (3)| 250 A| 250 A| 3
SG03 Series
SUN-3.6K-SG03LP1-EU| 154 A (4)| 90 A| 90 A| 1
SUN-5K-SG03LP1-EU| 213 A (4)| 120 A| 120 A| 2
SUN-6K-SG03LP1-EU| 256 A (4)| 135 A| 135 A| 2

Single-Phase Models

| Inverter Peak (10 seconds)| Max Continuous Charge| Max Continuous Discharge| AES RACKMOUNT

48-48-5120/ **48-48-5120-H**

Minimum per inverter (7)

---|---|---|---|---
SG04 Series
SUN-3K-SG04LP1-EU| 128 A (5)| 70 A| 70 A| 1
SUN-3.6K-SG04LP1-EU| 154 A (5)| 90 A| 90 A| 1
SUN-5K-SG04LP1-EU| 213 A (5)| 120 A| 120 A| 2
SUN-6K-SG04LP1-EU| 256 A (5)| 135 A| 135 A| 2
SG05 Series
SUN-3.6K-SG05LP1-EU| 154 A (6)| 90 A| 90 A| 1
SUN-5K-SG05LP1-EU| 213 A (6)| 120 A| 120 A| 2
SUN-6K-SG05LP1-EU| 256 A (6)| 135 A| 135 A| 2
SUN-7.6K-SG05LP1-EU| 324 A (6)| 190 A| 190 A| 2
SUN-8K-SG05LP1-EU| 342 A (6)| 190 A| 190 A| 2

Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-5/6/7.6/8K-SG01LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2023-12-06).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-12/14/16K-SG01LP1-EU Hybrid Inverter User Manual (Ver. 2.2, 2024-02-03).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Hybrid Inverter SUN-7.6/8K-SG02LP1-EU-AM2 SUN-10/12K-SG02LP1-EU-AM3 datasheet (downloaded from the website 2024-04-11).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-3.6/5/6K-SG03LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2024-03-28).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-3K-SG04LP1-24-EU, SUN-3/3.6/5/6K-SG04LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2024-03-29).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-3.6/5/6/7.6/8K-SG05LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2024-03-26).
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 (805-0043 Rev F).

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

Split-Phase / Three-Phase Models| Inverter Peak (10 seconds)| Max Continuous Charge| Max Continuous Discharge| AES RACKMOUNT 48- 48-5120/ 48-48-5120-H

Minimum per inverter (2)

---|---|---|---|---
SG02 Series
SUN-5K-SG02LP2-US-AM2| 213 A (1)| 120 A| 120 A| 2
SUN-6K-SG02LP2-US-AM2| 256 A (1)| 135 A| 135 A| 2
SUN-7.6K-SG02LP2-US-AM2| 324 A (1)| 190 A| 190 A| 2
SUN-8K-SG02LP2-US-AM2| 342 A (1)| 190 A| 190 A| 2
SUN-10K-SG02LP2-US-AM3| 427 A (1)| 220 A| 220 A| 3
SUN-12K-SG02LP2-US-AM3| 512 A (1)| 250 A| 250 A| 3

Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Hybrid Inverter SUN-5/6/7.6/8K-SG02LP2-US-AM2 SUN-10/12K-SG02LP2-US-AM3 datasheet (downloaded from the website 2024-04-11).
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 (805-0043 Rev F).

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

Three-Phase Models

| Inverter Peak (10 seconds)| Max Continuous Charge| Max Continuous Discharge| AES RACKMOUNT 48- 48-5120/ 48-48-5120-H

Minimum per inverter (4)

---|---|---|---|---
SG04 Series
SUN-5K-SG04LP3| 213 A (1)| 120 A| 120 A| 2
SUN-6K-SG04LP3| 256 A (1)| 150 A| 150 A| 2
SUN-8K-SG04LP3| 342 A (1)| 190 A| 190 A| 2
SUN-10K-SG04LP3| 427 A (1)| 210 A| 210 A| 3
SUN-12K-SG04LP3| 512 A (1)| 240 A| 240 A| 3
SG05 Series
SUN-3K-SG05LP3-EU-SM2| 128 A (2)| 70 A| 70 A| 1
SUN-4K-SG05LP3-EU-SM2| 171 A (2)| 95 A| 95 A| 1
SUN-5K-SG05LP3-EU-SM2| 213 A (2)| 120 A| 120 A| 2
SUN-6K-SG05LP3-EU-SM2| 256 A (2)| 135 A| 135 A| 2
SUN-8K-SG05LP3-EU-SM2| 342 A (3)| 190 A| 190 A| 2
SUN-10K-SG05LP3-EU-SM2| 427 A (3)| 210 A| 210 A| 3
SUN-12K-SG05LP3-EU-SM2| 512 A (3)| 240 A| 240 A| 3

Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-5/6/8/10/12K-SG04LP3-EU Hybrid Inverter User Manual (Ver. 2.2, 2024-01-26).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Three Phase Hybrid Inverter SUN-3/4/5/6K-SG05LP3-EU-SM2 datasheet (downloaded from the website 2024-04-11).
Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Three Phase Hybrid Inverter SUN-8/10/12K-SG05LP3-EU-SM2 datasheet (downloaded from the website 2024-04-11).
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 (805-0043 Rev F).

LYNK II CAN HARDWARE TERMINATION AND CAN OUT PIN CONFIGURATION

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.

LYNK II CAN Out – RJ45 PIN Assignments for Deye 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.

CAN Out	Header Jumper	RJ45 Pin
CAN L	H2 – 5 – 7	5
CAN H	H3 – 8 – 10	4
CAN GND	N/A	N/A

INSTALLING AND CONNECTING LYNK II TO THE DEYE NETWORK

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 etwork 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 RACKMOUNT

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

Connecting LYNK II to the Deye Network
Before connecting LYNK II to the Deye 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 CAT5e or higher communication cable into the LYNK II CAN out port and the other end into the correct CAN port of the Deye inverter- charger.

ENABLING LYNK II TO COMMUNICATE WITH DEYE DEVICES

When properly connected to a closed-loop network and set to use the Deye 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 Deye inverter-charger. LYNK II will also transmit charge voltage and current requests from the Discover Lithium battery to a Deye inverter-charger.
LYNK ACCESS software for 64-bit Windows 10 / 11 is required to configure LYNK II settings for closed-loop CAN communication with Deye inverter-chargers.

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 Deye inverter-charger. The inverter-charger will display an F58 BMS Communication Fault if communication is lost. The Deye inverter-charger will check every five minutes and resume closed-loop operation if communication is re-established. However, if communication cannot be reestablished, you may have to manually convert the Deye inverter-charger to a open-loop configuration to resume operation. Refer to A.1 Deye Open-loop Configuration.

NOTE

In a 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 Deye 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 Deye 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 Deye relay functions, generator starting or other grid-interactive features. These functions are controlled through the programming of the Deye inverter-charger.

Setting Deye Closed-loop Configuration

Setting the LYNK II Communication Protocol for Deye
Set the LYNK II communication protocol and configure closed loop on the Deye inverter-charger.

LYNK II Protocol

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.
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 Deye COM port. Refer to Figure 4. Deye CANopen Connection.
Open LYNK ACCESS. Options for configuration and settings are found by selecting the LYNK tab.
Connect the LYNK II and open LYNK ACCESS. Ensure that you only have one LYNK device connected to the computer.
Open LYNK ACCESS and select the LYNK tab. Select the blue gear icon in the upper right area of the CAN Settings tile.
Select the pre-configured Deye protocol to complete the closed-loop 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.

Setting Closed-loop Configuration on the Deye Inverter-Charger

NOTE
In a 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 Deye 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 Deye 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 Deye communication protocol for the LYNK II, complete the closed-loop configuration settings on the Deye inverter-charger. Ensure the Discover Lithium Batteries are networked with LYNK II and that the LYNK II is connected to the Deye CAN port.
If necessary, first configure Deye 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 inverter-charger will cascade parameters and settings to the slave inverter-chargers.

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

Set the Discover Lithium batteries to ON and set the inverter-charger to ON.
Using the touch screen and keypad on the inverter-charger, navigate to Main Screen > System Setup > Battery Setting.
Specify the battery settings according to the instructions in the tables that follow.
Touch the Up and Down arrows to scroll through the screens. Touch the checkmark button to save changes.
Exit and restart the inverter-charger.

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

Main Screen > System Setup > Battery Setting

All values and parameters assume an operating temperature of 25 °C.
Touch the Up and Down arrows to scroll through screens. Touch the check mark button to save changes, X to cancel. Ignore data displayed in gray boxes.

Battery Setting (page 1)

Batt Mode| Select the Lithium (1) option to use the battery BMS.
Activate Battery| Select this check box.

Touch the Up and Down arrows to scroll through screens. Touch the check mark button to save changes, X to cancel. Ignore data displayed in gray boxes.

Battery Setting (page 3)

Lithium Mode| Set this value to 00.
Shutdown| Adjust values to support the use case or keep the original values.
Low Batt
Restart

Main Screen > System Setup > Advanced Function

Touch the Up and Down arrows to scroll through screens. Touch the check mark button to save changes, X to cancel. Ignore data displayed in gray boxes.

Advanced Function

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.

Set other settings to match the user preferences or particular use case.

APPENDIX

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

Set the Discover Lithium batteries to ON and set the inverter-charger to ON.
Using the touch screen and keypad on the inverter, navigate to Main Screen > System Setup > Battery Setting.
Specify the battery settings according to the instructions in the tables that follow. Touch the Up and Down arrows to scroll through screens.
Touch the check mark button to save changes.
Exit and restart the inverter-charger.

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

A.1.1 Open-Loop — Battery Setting

All values and parameters assume an operating temperature of 25 °C.
Touch the Up and Down arrows to scroll through screens. Touch the check mark button to save changes, X to cancel. Ignore data displayed in gray boxes.

Battery Setting (page 1)

Batt Mode| Select the Use Batt V option to use battery voltage for all the settings. (1)
Activate Battery| Select this check box.
Batt Capacity| Set to the number of Discover Lithium batteries x Ah capacity of each. For example, set to 200 Ah (2 x 100 Ah) for two AES RACKMOUNT 48-48-5120 batteries.
Battery Setting (page 1)

Max A Charge| For a single inverter, set to the smaller value between the inverter’s maximum charge rate or the quantity of attached batteries multiplied by the battery’s maximum charge rating.

For example:
Single phase system with SUN-6K-SG01LP1-US inverter and two AES RACKMOUNT 48-48-5120 batteries:

Set the SUN-6K-SG01LP1-US inverter to the lesser of the inverter’s maximum charge rate of 135 A, or 190 A for two AES RACKMOUNT 48-48-5120 batteries that are each rated at a maximum charge rating of 95 A (2 x 95 A = 190 A).
Three-phase system with three SUN-6K-SG04LP3 inverters and four AES RACKMOUNT 48-48-5120 batteries:
For a three-phase system, set to the smaller value between the master inverter’s maximum charge rate or the quantity of attached batteries multiplied by the battery’s maximum charge rating divided by the number of inverters. For example, set the SUN-6K-SG04LP3 inverter to the lesser of the inverter’s maximum charge rate of 150 A, or 126 A for four AES RACKMOUNT 48-48- 5120 batteries that are each rated at a maximum charge rate of 95 A, and then divided by three inverters (4 x 95 A ÷ 3 = 126.667 A).

Max A Discharge| For a single inverter, set to the smaller value between the inverter’s maximum discharge rate or the quantity of attached batteries multiplied by the battery’s maximum discharge rating. For example, set the SUN-6K-SG01LP1-US inverter to the lesser of the inverter’s maximum discharge rate of 135 A, or 190 A for two AES RACKMOUNT 48-48-5120 batteries that are each rated at a maximum discharge rating of 95 A.

For a three-phase system, set to the smaller value between the master inverter’s maximum discharge rate or the quantity of attached batteries multiplied by the battery’s maximum discharge rating divided by the number of inverters. For example, set the SUN-6K-SG04LP3 inverter to the lesser of the inverter’s maximum discharge rate of 150 A, or 126 A for four AES RACKMOUNT 48-48- 5120 batteries that are each rated at a maximum discharge rate of 95 A and then divided by 3 inverters (4 x 95 A ÷ 3 = 126.667 A).

(1) To configure the open-loop parameters, do not select the Lithium parameter. Selecting the Lithium parameter enables the BMS for closed-loop communication.

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Battery Setting (page 2)

Start (%)| Not required in an open-loop configuration.
A| Set to the same Amp value 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 to 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.
Grid Change| Select this check box if charging from the grid is desired. (3)

A Grid Input Breaker must be connected to input from the grid for this to work.

Grid Signal| Clear the check box.

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

Touch the Up and Down arrows to scroll through screens. Touch the check mark button to save changes, X to cancel. Ignore data displayed in gray boxes.

Battery Setting (page 3)

Lithium Mode| This property is not applicable in a open-loop configuration.
Shutdown| Turns off the inverter when the battery reaches this SOC.
Low Batt| Inverter outputs a warning when the battery reaches this SOC.
Restart| Inverter AC output continues when the battery reaches this SOC.

Touch the Up and Down arrows to scroll through screens. Touch the check mark button to save changes, X to cancel. Ignore data displayed in gray boxes.

Battery Setting (page 3)

Float V| 53.6 V
Absorption V| 55.2 V
Battery Setting (page 3)

Equalization V| Do not equalize Discover Lithium batteries
Equalization Days
Equalization Hours
Shutdown (%)| Turns off the inverter when the battery reaches the specified SOC.
Low Batt (%)| Inverter outputs a warning when the battery reaches the specified SOC.
Restart (%)| Inverter AC output continues when the battery reaches the specified SOC.
TEMPCO (mv/C/Cell)| Set to 0 mv/C/Cell. (1)
Batt Resistance| Keep the default value of 25 mOhms.

Discover Lithium batteries do not require temperature compensation. Setting TEMPCO to 0 mv/C/Cell disables inverter controlled temperature compensation.