I just came back from the RV show and spoke to the RV dealer carrying KEYSTONE. Is some non keystone trailers had zamp stickers on the connection. The keystone trailers had an after market sticker that said solar ready. I talked to two different reps from the dealer. One told me, I don't need a charge controller until I'm over 80 watts of panels hooked up. I asked another rep same company. He said...charge controller required no matter what. Bang my head against a wall!
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