5 replies in 1/2 hour - very impressive.
I am using those batteries because that is what came with the camper, so when bought new batteries, that is what I went with. Probably not the best reason.
I can charge the batteries with the on-board generator. With the new converter, it charges at around 35 Amps. I thought about getting the higher Amp PD unit, but my old converter was the only rated at 32 Amps, so I was concerned about the wiring.
Solar panels might be a challenge in Oregon - we tend not to see the Sun between November and May.
We replaced all of the lights with LED's (draw dropped from 1.5 Amps to 0.1 Amps per bulb). Blower on fan for heater draws about 5 Amps. So even if that is running 100% for 10 hours at night, that would be 5 Amp-hours. So 1 1/2 hours of running the generator in the AM should fix that.
And since the noise in the parking lot is loud when they are plowing snow, I can actually run the generator at night without anyone even noticing....