Offgrid Aussi
New Member
With solar panels connected, I can measure only around + 1.5V DC at the PV terminals in the middle of a sunny day, although the unconnected open circuit voltage of the array is 400V (Voc) and the short circuit current is around 8A (Isc). I measured both, just to be sure.
The Display of the inverter tells me that I'm getting exactly 0.0V out of my panels, which I can confirm. There is no grid or load connected, just a 48V battery with SOC 98%.
While the inverter was running idle like that, I disconnected the main PV isolator and could hear and smell the spark it trigged inside the isolator. As if there was some serious load to disconnect.
I then disconnected the battery, waited 24h reconnected everything and rebooted the inverter, but no change there. I did some more tests and found something that struck me as odd, but could very well be by design:
When I start the Inverter with no PV input connected, I can measure a DC current building up across the PV terminals. It starts at around -1.5V and creeps down to -24.8V within a minute or so. Then it stays there. Just an observation, I have no idea whether that points to a fault or if that is desired behaviour.
I do know, that I don't know where to go from here. I certainly don't want to stress my PV isolator like that again, but I'd also like to get the PV array connected.
Has anyone encountered a similar problem when connecting the PV side of an inverter?
The manual reads like PnP: Just connect the solar array to the PV ports and start the inverter. As long as the input voltage is between 150 and 450 V DC, everything should be fine.
Well, in my case it's not, so any help is greatly appreciated.
The Display of the inverter tells me that I'm getting exactly 0.0V out of my panels, which I can confirm. There is no grid or load connected, just a 48V battery with SOC 98%.
While the inverter was running idle like that, I disconnected the main PV isolator and could hear and smell the spark it trigged inside the isolator. As if there was some serious load to disconnect.
I then disconnected the battery, waited 24h reconnected everything and rebooted the inverter, but no change there. I did some more tests and found something that struck me as odd, but could very well be by design:
When I start the Inverter with no PV input connected, I can measure a DC current building up across the PV terminals. It starts at around -1.5V and creeps down to -24.8V within a minute or so. Then it stays there. Just an observation, I have no idea whether that points to a fault or if that is desired behaviour.
I do know, that I don't know where to go from here. I certainly don't want to stress my PV isolator like that again, but I'd also like to get the PV array connected.
Has anyone encountered a similar problem when connecting the PV side of an inverter?
The manual reads like PnP: Just connect the solar array to the PV ports and start the inverter. As long as the input voltage is between 150 and 450 V DC, everything should be fine.
Well, in my case it's not, so any help is greatly appreciated.