Technical Support

Hi All

I am having an issue with my PV panel voltage sometimes flatline at around 180v nearly all day [except for some peaks].

Sometimes the voltage is a normal graph [see screenshots] but othertimes one of the strings is flat line or sometimes both! It occurs on PV1 and PV2 and generally lasts all day only on that string. Overall, I woud say that one string is flat voltage about 1/3 of the time.

I contacted the PV manafacturer and they say its normal but I can't see how it is as its a flat line meaning somes sort of limitiation by something??? When both are around 180v the PV power is definately limited........

PV spec sheet also attached. I have an 8kW inverter, 15kWh battery and x2 strings in series of 6 panels on different aspect roofs.

Thanks for any thoughts. Matt

Hi Groots

Thanks for the reply. Please find attached for the 6th [both flat voltage] and the 13th [one PV flat voltage]. I haven't included the others as on those days I had the PV limitied as I was away.

I'll look for another example if I can where power seemed limited.

What are your thoughts please? Matt