Hi All,

I'm rebuilding my system after complete battery failure. In my last post I got many recommendations to upgrade my charge controller from 80A PWM to MPPT. I have (9) 255 watt panels connected in parallel. I did the math 2295 watts / 24 Volts = 96 Amps, add 25% and I'm at 119 Amps... Well as you well know 120A CCs are expensive. I'm most likely only going to have (8) or (10) 12 Volt 110ah batteries so this seems excessive to me??? Do I have way too many watts on the roof? Should I sell 4-5 panels and buy batteries and a new controller? Can I run a smaller MPPT and still benefit over my PWM?

Any advice is much appreciated.

I'm rebuilding my system after complete battery failure. In my last post I got many recommendations to upgrade my charge controller from 80A PWM to MPPT. I have (9) 255 watt panels connected in parallel. I did the math 2295 watts / 24 Volts = 96 Amps, add 25% and I'm at 119 Amps... Well as you well know 120A CCs are expensive. I'm most likely only going to have (8) or (10) 12 Volt 110ah batteries so this seems excessive to me??? Do I have way too many watts on the roof? Should I sell 4-5 panels and buy batteries and a new controller? Can I run a smaller MPPT and still benefit over my PWM?

Any advice is much appreciated.

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