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carl2591's avatar
carl2591
Explorer III
Dec 26, 2017

out what size charge controller for solar panels.??

I was gifted a couple of 335 watt solar panels the produce 46.3V Voc, 37.9V Vmp, 8.8A Imp, 9.36A Isc. I have a 20 amp MPPT controller that might work but not sure as the info show 12 or 24 v opera...
Ed_Gee's avatar
Ed_Gee
Explorer II
Dec 26, 2017
You will need a new, larger MPPT controller even to use one of those panels. That 8.8A imp rating is for the 37 volt vmp output. An MPPT controller will be converting that down to your 12VDC system which will be about triple the amps....around 26amps I would guess, which exceeds the capacity of your current controller. .....and that is for just one of those panels you have!

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