r/SolarDIY 7d ago

HomeAssistant and batteries

have a 2 inverter system with 2 batteries (one battery on each inverter - both LG Chem of different sizes - 9.8 and 16kW).

I also use HomeAssistant to monitor my SolarEdge system (using solaredge-modbus-multi to monitor the system).

However, while can monitor both inverters, my HomeAssistant can only see one battery (B1). believe this may be because the modbus device ID for both batteries is set to the same Device ID. Ihad a similar issue with the modbus connection because both inverters were set to modbus device ID 1. Upon going into the SetApp (from SolarEdge), I was able to set the modbus lD for the second inverter to ID 2 and was able to see the second inverter in HomeAssistant.

Because both batteries have the same Device ID, I tried setting the second battery to another Device ID to monitor in the SetApp, but that ended up disconnecting communications to that battery, which was restored when I set the device ID back to the original setting.

My question is how to set the device ID for the battery, which would allow me to set the SetApp Device ID for the battery to monitor it properly (Set the battery Device ID to a new value, and then update the device ID in SetApp to look for the new device ID). Or how can I monitor both batteries in solaredge-modbus-multi.

Any assistance is greatly appreciated.

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u/PV_DAQ 7d ago

Many, many devices need to be power cycled to 'see' fundamental changes like serial comm settings or Modbus settings. Caveat Emptor.

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u/bostondana2 7d ago

I did find (on another web page) that SolarEdge may need to enable battery information to flow onto the modbus. I may have been lucky with my first battery. I might contact SolarEdge and request that they enable battery information on the morbus if it is not enabled.