Wanted to try to fit solar panels around my Maxxair fan so opted to go with mismatched Solar panels. Did a good amount of research and thought i had concluded on a good plan to wire them all in Parallel. The panels are similar in Voltage but not in Amps. However realized i might have a problem when I was watching a video yesterday that stated there is a minimum voltage for MPPT Solar Charge controllers. I dug in a bit and it seems that Victron solar charge controllers need battery voltage (12v) + 5v to start charging. The lowest voltage for my panels is 17.95. However it seems that the panels likely won't reach that voltage until mid morning if at all, leading to a solid amount of effeciency loss
|Panel Wattage||175 watt||100 watt||50 watt||50 watt|
|Optimum Operating Voltage (Vmp)||17.95V||20.3V||18V||18V|
|Optimum Operating Current (Imp)||9.75A||4.93A||3.01A||3.01A|
Wired in parellell, 99% effeciency could be achieved. But I don't see any other configuration (series or series parelell) where I could even get about 70% efficiency.
I've purchased a Victron MPPT charge controller. Is there another option that might work or a panel configuration i'm missing