2.2 Communication problem with Inverter
5
No.
Name
Description
16
Configuration
Check if the configuration is correct. Refer to latest “BYD Battery-Box Premium
LVL Minimum Configuration List” (V1.3 or above) available at:
Make sure the inverter is configured and working correctly.
17
Communication cable
- Confirm PIN / Cable Configuration for the specific inverter model
- Replace the communication cable (min. CAT5!)
18
Check terminal resistor
Make sure that the terminal resistor is connected to the OUT port of the last
battery (the battery with the highest address).
19
App Configuration and
Firmware
Please check if the App configuration was successful and the Firmware is the
most recent one. If there are problems, please refer to Section 2.3
20
Restart the entire system
1. Switch off the Inverter
2. Switch off the battery (Press button on BMU for 5 seconds until all batteries
switch off. All LEDs should be off)
3. Wait for 2 Minutes
4. Turn on the Battery (button on battery connected to BMU) and then
5. Turn on inverter second
21
Further checking
If problem remains:
- Download all data with BCP (section 2.5)
- Check the inverter
- Try by replacing the BMU, if available
