Currently we have 1600ah 12V battery setup that we charge from alternator, generator or shore power. It's AGM so only 50% DoD and no solar at all today. The type of use depends on what type of trip we are on, we are not full time in the RV. Sometimes we boondock for a 3 days of tailgating or camping, other times we are taking a couple of weeks for longer trips with a mix of full hookups and random stops with no hookups. Because we are usually driving between stops, our engine alternator keeps the bank fully topped off most days.
I understand it's going to be very difficult for the OP to meet his goals with 400 in solar and a small bank, he is going to have to expand that system to successfully replace propane.
I'm not saying it's ideal, just that it is possible to be all electric and there are real benefits. I know my wife would never even consider having propane again if she had been in a fire like that, and we did take the risk of fire seriously when we were planning out our current coach. I don't think I'd be able to sleep at night either.
I understand it's going to be very difficult for the OP to meet his goals with 400 in solar and a small bank, he is going to have to expand that system to successfully replace propane.
I'm not saying it's ideal, just that it is possible to be all electric and there are real benefits. I know my wife would never even consider having propane again if she had been in a fire like that, and we did take the risk of fire seriously when we were planning out our current coach. I don't think I'd be able to sleep at night either.