@SunBandit I suspect you may have it backwards... I believe fans 1 and 2 are for the PV charge controller, and fan 3 is for the inverter. During "peak PV", are your AC loads still relatively light? If so, that might explain why fan 3's exhaust remains cool. Does fan 3 exhaust heat up if you put 3 or 4 kW of AC load on your inverter?
I'm pretty sure that's incorrect. When I had only grid charging, and loads were live, and no PV at all, the two upper fans ran, and the lower one did not.
@SunBandit I suspect you may have it backwards... I believe fans 1 and 2 are for the PV charge controller, and fan 3 is for the inverter. During "peak PV", are your AC loads still relatively light? If so, that might explain why fan 3's exhaust remains cool. Does fan 3 exhaust heat up if you put 3 or 4 kW of AC load on your inverter?
