Hi all a question about charging my house batteries while dry camping. I have the two 12 volt deep cycles that came with my coach, I am trying to figure out how long it would take to get a full charge from my generator. I called Grand design and asked about the converter/charger, they said it was a 55amp converter. 337rls I didn't ask if this was a single stage or more. Any information would be greatly appreciated. Thank you Mike