Forum Discussion

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...
pianotuna's avatar
pianotuna
Nomad III
Dec 27, 2017
Hi,

Only if the battery bank were changed to 24 volts would a 24 v dc to 12 v dc converter be needed.

I would not do that in your shoes.

I would get a much larger fully featured MPPT controller.

carl2591 wrote:
while i do have two panels i as planning on only using one of them and it sounds like that is all the MPPT can handle. and using a 12 v volt system. In reading the article posted it appear I might need a DC to DC convertor to lower voltage?

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