I have to agree here, you need to learn a lot first. Lithium batteries are dangerous when handled incorrectly.
If you were thinking of running a water heater, a 12000 BTU A/C, and a washer/dryer off batteries: that is not going to happen, for two reasons:
1. where are you going to get that power from?
2. where are you going to store the power?
Let's start with 1.
- Let's assume you are heating 15 Gallons from 50F to 130F daily. With the formula Q=mCt you get about 3kWh.
- Let's assume that your A/C draws 1kW and runs 8h effectively per day, i.e. 8kWh
- Let's assume your dryer uses 4kWh per cycle and you use it every other day, i.e. 2kWh
- Let's assume you use 2kWh for all other stuff
That's 15kWh. Say you need to generate/store 20kWh. That requires 4-5kW of solar power IN A SUNNY CLIMATE. On a Chevy Express you can, realistically fit, maybe 500W. I had 400W on my Nissan NV2500 and it was PACKED. So Solar is out.
Charge it from the wall? Ok, You'll need maybe 3 hours at a high powered dryer plug per day on the road.
2. Say you want to boondock for three days at a time. You'll need 50-60kWh of storage capacity. Basically, you need an entire Tesla model S battery pack.
So: the water heater, the dryer and the A/C are never going to run on batteries. So, just get a Harbor freight generator!