I was reading somewhere that an PV inverter that could possibly be connected to an emergency system should never be allowed to remain on when the system is running on backup generator power. It was stated that most inverters have an input that will shut the inverter off via an aux contact in the emergency generator when the emergency generator is up and running.
Amoung other reasons, one of the reasons for shutting the inverter down is that if the loads on the system are less than the amount of power that the inverter is supplying, then the inverter will push current back into the generator and damage the generator. Can someone explain to me how this would be the case. I understand that as long as there is sunlight avaliable a PV inverter will output a constant current regardless of system conditions, however I'm not sure I understand how this will backfeed into the genrator. Can someone please help explain?
Amoung other reasons, one of the reasons for shutting the inverter down is that if the loads on the system are less than the amount of power that the inverter is supplying, then the inverter will push current back into the generator and damage the generator. Can someone explain to me how this would be the case. I understand that as long as there is sunlight avaliable a PV inverter will output a constant current regardless of system conditions, however I'm not sure I understand how this will backfeed into the genrator. Can someone please help explain?