VOLTA Lithium Battery: Inverter Communication Settings Guide
Provided by Oliross Solar
Introduction
This document provides detailed instructions for establishing communication between VOLTA Lithium Batteries and various inverter brands using CAN and RS485 communication protocols. It covers port definitions, parallel connection schematics, dial-up switch settings, software configuration, and specific setup procedures for multiple inverter models.
1. VOLTA Lithium Battery CAN/RS485 Port Definition
RS485 Port Definition
| Pin Number | RS485 Port |
|---|---|
| Pin 1 | RS485-B |
| Pin 2 | RS485-A |
| Pin 3 | RS485-GND |
| Pin 4 | RS485-B |
| Pin 5 | RS485-A |
| Pin 6 | RS485-GND |
| Pin 7 | NC(empty) |
| Pin 8 | NC(empty) |
CAN Port Definition
| Pin Number | CAN Port |
|---|---|
| Pin 1 | CANL |
| Pin 2 | CGND |
| Pin 3 | NC(empty) |
| Pin 4 | CANH |
| Pin 5 | CANL |
| Pin 6 | NC(empty) |
| Pin 7 | CGND |
| Pin 8 | CANH |
Diagram Description: The document shows RJ45 connectors labeled 'A' and 'B' with pin assignments for RS485 and CAN communication.
2. Dial-up Switch Settings for Parallel Packs
When using VOLTA Lithium Batteries in parallel, it is essential to set unique addresses for each pack using the dial-up switch on the BMS to avoid address conflicts. The dial switch settings follow a BCD code format.
Address Setting Rules
| Address | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| 1 (master) | OFF | OFF | OFF | OFF |
| 2 (slave 1) | ON | OFF | OFF | OFF |
| 3 (slave 2) | OFF | ON | OFF | OFF |
| 4 (slave 3) | ON | ON | OFF | OFF |
| 5 (slave 4) | OFF | OFF | ON | OFF |
| 6 (slave 5) | ON | OFF | ON | OFF |
| 7 (slave 6) | OFF | ON | ON | OFF |
| 8 (slave 7) | ON | ON | ON | OFF |
| 9 (slave 8) | OFF | OFF | OFF | ON |
| 10 (slave 9) | ON | OFF | OFF | ON |
| 11 (slave 10) | OFF | ON | OFF | ON |
| 12 (slave 11) | ON | ON | OFF | ON |
| 13 (slave 12) | OFF | OFF | ON | ON |
| 14 (slave 13) | ON | OFF | ON | ON |
| 15 (slave 14) | OFF | ON | ON | ON |
| 16 (slave 15) | ON | ON | ON | ON |
Diagram Description: A dial switch with four positions (1, 2, 3, 4) is shown, indicating ON and OFF states.
3. Schematic Diagram of Parallel Connection
To connect VOLTA Lithium Batteries in parallel, connect the positive terminals together and the negative terminals together. Communication cables should also be connected in parallel.
For 4pcs Batteries
Diagram Description: Shows parallel connection of 4 batteries (Master, Slave 1, Slave 2, Slave 3) with Battery+ and Battery- connections, and RS485/CAN communication cables linking them to a MASTER INVERTER.
For More Than 4pcs Batteries (e.g., up to 15)
Diagram Description: Shows parallel connection of multiple batteries (Master, Slave 1 to Slave 4, etc.) with Battery+ and Battery- connections, and RS485/CAN communication cables linking them to a MASTER INVERTER.
4. VOLTA Lithium Battery Inverter Communication Setup
4.1 Method 1: Communicate with Factory Default Inverters
Steps:
- Select the appropriate communication cables based on inverter labeling. Connect the RJ45 connector of the battery end (CAN/RS485) and the inverter end (CAN/RS485) to their respective interfaces.
- Turn on the battery and inverter. Wait for them to operate correctly. The battery is factory-configured to communicate with DEYE, Sunsynk, Luxpower, Sofar, and TBB inverters (via CAN Port). The battery will automatically select and communicate with one of these inverters.
- Upon successful communication, the inverter will display the battery status, including voltage, current, SOC, and temperature.
4.2 Method 2: Communicate with Optional Inverters (Protocol Select)
This method is for inverters such as Growatt, Solax, Goodwe, Sorotech, LTW, MUST, SMA, etc.
Steps:
- Ensure the battery BMS is powered on and not in sleep mode. Connect the RS232 crystal head of the communication cable to the battery communication port and the USB end to the computer.
- Unzip the BMS monitoring software package onto your computer (requires Windows Microsoft .NET Framework 2.0 or higher). Run the main program icon (BMS.exe).
- Enter the password:
green1234(case-sensitive, "green" is the password part). - In the software, click "Parameter information" at the top, then click the "Read" button to retrieve battery parameters.
- Select the desired inverter protocol under "Protocol type".
- Click the "Write" button to set the protocol. A success message indicates the protocol selection is complete.
- Important: Reset the battery, then reset the inverter for the protocol selection to take effect.
- Select the correct cables and connect the battery and inverter ends. Restart both devices. The battery will automatically communicate with the inverter using the selected protocol.
4.3 Remark of Inverter Protocol Code
Diagram Description: Shows a software interface for setting parameters, including COM port selection, password entry, and protocol selection tables for RS485 and CAN protocols, listing various inverter brands and their compatible protocols.
5. SMK Inverter RS485 Communication Setting
Process of Install:
- Use the RS485 Port communication cable to connect the inverter and lithium battery. Ensure you use the corresponding RS485 inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- Select the inverter AC output mode (Single phase or parallel, depending on your connection).
- Set the work model type to "Lithium Model: LI4".
If communication is successful, the inverter screen will display the battery system's real-time status.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for SMK RS485 communication. Pin 1(B) to 1(B), Pin 2(A) to 2(A), etc.
6. DEYE(SUNSYNK) Inverter CAN Communication Setting
Process of Install:
- Use the CAN port communication cable to connect the inverter and lithium battery. Ensure you use the corresponding CAN inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- Set the inverter work model type to "Lithium Model: 00" on the inverter screen.
If communication is successful, the inverter screen will show the battery system's real-time status.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for DEYE(SUNSYNK) CAN communication. Pin 1 to 1, Pin 2 to 2, Pin 3 to 3, Pin 4(H) to 4(H), Pin 5(L) to 5(L), etc.
7. Growatt Inverter CAN Communication Setting
Process of Install:
- Use the CAN communication cable to connect the inverter and lithium battery. Ensure you use the corresponding CAN inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- To connect the battery BMS, set the battery type to "LI" in Program 05. After setting "LI", it will switch to Program 36 to choose the communication protocol. Select CAN communication protocol L51~L99.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for Growatt CAN communication. Pin 1 to 1, Pin 2 to 2, Pin 3 to 3, Pin 4(H) to 4(H), Pin 5(L) to 5(L), etc.
8. Luxpower Inverter CAN Communication Setting
Process of Install:
- Use the CAN communication cable to connect the inverter and lithium battery. Ensure you use the corresponding RS485 inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- Enter Advanced settings and choose "Battery type: Lithium Battery".
- Select the "Lithium brand: Pylon Battery".
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for Luxpower CAN communication. Pin 1 to 1, Pin 2 to 2, Pin 3(L) to 3, Pin 4(H) to 4(H), Pin 5 to 5(L), etc. Also shows a screenshot of the Luxpower inverter's "Advanced setting" screen for battery configuration.
9. Voltronic Inverter RS485 Communication Setting
Process of Install:
- Use the RS485 Port Communication cable to connect the inverter and lithium battery. Ensure you use the corresponding RS485 inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- To connect the battery BMS, set the Master Inverter Battery Type to "LIb" (for other inverters paralleled, set to "use"). After selection, maximum charging current, bulk charging voltage (C.V voltage), floating charging voltage, and low DC cut-off battery voltage settings will be automatically configured.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for Voltronic RS485 communication. Pin 1 to 1(B), Pin 2 to 2(A), Pin 3(B) to 3, Pin 4 to 4, Pin 5(A) to 5, etc. Also shows a "LIb-protocol compatible battery" indicator.
10. SMA Inverter CAN Communication Setting
Process of Install:
- Use the CAN cable to connect the inverter and lithium battery. Ensure you use the corresponding CAN inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- Set the Battery configuration type as "Lithium-Ion" and set the battery capacity.
- After completing all steps, scan the QR code on the inverter lid with the SMA Energy APP (downloaded from a mobile phone) to view the system's real-time status.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for SMA CAN communication. Pin 1 to 1, Pin 2 to 2, Pin 3 to 3, Pin 4(H) to 4(H), Pin 5(L) to 5(L), etc. Also shows a "Battery configuration" dropdown for Type and Nominal capacity.
11. SAKO Sunpolo Inverter RS485 Communication Setting
Process of Install:
- Use the RS485 cable to connect the inverter and lithium battery. Choose the RS485 inverter cable with the correct brand label.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- To connect the battery BMS, set the battery type to "LIb battery". After selection, maximum charging current, bulk charging voltage (C.V voltage), floating charging voltage, and low DC cut-off battery voltage settings will be automatically configured.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for SAKO Sunpolo RS485 communication. Pin 1 to 1, Pin 2 to 2, Pin 3(B) to 3, Pin 4 to 4(B), Pin 5(A) to 5(A), etc. Also indicates that selecting "LIb" for lithium battery compatibility will auto-configure programs 11, 17, 18, and 19.
12. Victron Inverter CAN Communication Setting
Process of Install:
- Use the CAN communication cable to connect the inverter and lithium battery. Ensure you use the corresponding CAN inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- To connect the battery BMS.
Diagram Description: Shows RJ45 pinout mapping between Inverter Side A and Battery Side B for Victron CAN communication. Pin 1 to 1, Pin 2 to 2, Pin 3 to 3, Pin 4 to 4(H), Pin 5 to 5(L), Pin 6 to 6, Pin 7(H) to 7, Pin 8(L) to 8.
13. TBB Inverter CAN Communication Setting
Process of Install:
- Use the CAN communication cable to connect the inverter and lithium battery. Ensure you use the corresponding CAN inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- To connect the battery BMS.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for TBB CAN communication. Pin 1 to 1, Pin 2 to 2, Pin 3 to 3, Pin 4(H) to 4(H), Pin 5(L) to 5(L), Pin 6 to 6, Pin 7 to 7, Pin 8 to 8.
14. SRNE Inverter RS485 Communication Setting
Process of Install:
- Use the CAN communication cable to connect the inverter and lithium battery. Ensure you use the corresponding CAN inverter cable.
- Press the button to start the lithium battery; power output should be ready.
- Turn on the inverter. Warning: Turn on the battery first, then the inverter.
- To connect the battery BMS.
Diagram Description: Shows RJ45 pinout mapping between Inverter (A) and Battery (B) for SRNE RS485 communication. Pin 1 to 1(B), Pin 2 to 2(A), Pin 3 to 3, Pin 4 to 4, Pin 5 to 5, Pin 6 to 6, Pin 7(A) to 7, Pin 8(B) to 8. Also shows an image of connected INV and BMS cables.
15. Inverter Voltage Setting Reference
| Inverter Voltage Setting | 16S 51.2V setting | 15S 48V setting | Remark |
|---|---|---|---|
| Bulk Charging Voltage | 55.2V-56.8V | 52.5V--54.0V | It's just for reference, you can modify it according to the different situations |
| Float Voltage | 52.8V-54.4V | 49.5V-51.0V | |
| Cut-off Voltage | 44.0V--45.6V | 41.3-42.8V |
16. Charge & Discharge Curves
The document includes various performance curves for the VOLTA Lithium Battery:
- Different Rate Discharge Curve @25°C: Illustrates voltage drop over discharge time for different current rates (0.1C, 0.2C, 0.5C, 1C).
- Different Temperature Discharge Curve @0.5C: Shows voltage versus capacity percentage at various temperatures (50°C down to -10°C) under a 0.5C discharge rate.
- Charge and Discharge at 25°C,0.5C: Displays voltage versus capacity percentage during both charging and discharging cycles at 25°C and 0.5C.
- Different Temperature Self Discharge Curve: Plots remaining capacity percentage against storage time in months for different temperatures (10°C to 50°C).
- Cycle Life Curves:
- Different Discharge Depth Life Curves & 25°C,0.5C: Shows remaining capacity percentage versus the number of cycles for 60%, 80%, and 100% Depth of Discharge (DOD) at 25°C.
- Different Discharge Depth Life Curves & 40℃,0.5C: Shows remaining capacity percentage versus the number of cycles for 60%, 80%, and 100% DOD at 40°C.
