Fails to finish install when no battery is connected to system

[jshill103]

2022-05-25 15:54:53 ERROR (MainThread) [custom_components.enphase_envoy] Unexpected error fetching envoy Envoy ############ data: division by zero
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 191, in _async_refresh
self.data = await self._async_update_data()
File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 150, in _async_update_data
return await self.update_method()
File "/config/custom_components/enphase_envoy/init.py", line 78, in async_update_data
data[description.key] = round(battery_sum / len(battery_data), 2)
ZeroDivisionError: division by zero
2022-05-25 15:54:53 DEBUG (MainThread) [custom_components.enphase_envoy] Finished fetching envoy Envoy ############ data in 3.165 seconds (success: False)

temp solution is to wrap the math on line 78 in a try catch. Fixed it locally on my system,.

[jshill103]

made a pull request to fix this issue:
#8

[briancmpbll]

This should be fixed by #42