New at Solar. I purchased 2 160 watt /11v flexible panels for use with my rv. I am unsure how to choose a controller for them. Should I round up wattage and choose 400 watt and choose a 24v? Also forgive my total ignorance, which hook up wire gauge would be best.., learning as I go!
controllers are usually sized or rated for their battery charging amps. Each of your panels is capable of ~9amps. For 12v battery charging 2 x 160w in parallel would yield near 20A so the next bigger controller would be needed.