If vac is 0.0, this line results in a division by zero

[padriaanse]

omnikdatalogger/apps/omnikdatalogger/omnik/InverterMsg.py

Line 109 in a1dc1e3

 return round(pac / vac, 2) if pac >= 0 else -1 

[Jan Bouwhuis]

You are right. The test should be vac > 0. If pac>0 then vac should also be >0 but withe the solarman pv client no vac attribute will be available.