My trailer came with a 120VAC converter (I think rated at 35 amps) that charged a 12V lead acid battery. Is it a bad idea to charge my Lithium 12V 200Ah battery with the original converter that came with the trailer? (Of course, that would only be for initial charges, since I have solar panels.) Or would it be enough to rely on solar panels and DC to DC charger -- we'll be doing a lot of dry camping.