Issue Description:

The display of the DJI Power indicates "ERR4", and the DJI Home app prompts "Battery management system (BMS) software version error".

Solution

Check if the firmware version of the power station is the latest. If not, connect it to DJI Assistant 2 (Power Series) or to the Home app (excluding DJI Power 500) to update to the latest firmware.

If the above solution does not resolve your issue, please contact DJI Support.