Electric RVs would have tens of kwh of battery storage. You'd be able to run heating, AC, warm water, dishwashers, whatever for quite some time without charging. If you have a full charge and you really need 4KW, a 60kwh battery would last for 15 hours. That would be a really tiny battery for an RV of course. You'd likely want something a bit bigger. Maybe a 100kwh (25 hours) or even more. You get my point, it's not going to be an issue for most people. You can still plug it in or drive to the fast charger once a day or conserve a bit of power and maybe don't run the AC 24/7 on full blast.
12 kilowatt hours of battery storage gives you 3 hours of heat at 4 kilowatts. In 3 hours you freeze, literally (it's -0F/-18C outside, around Antero, Colorado).
12 kilowatt hours of battery is close 10 $10K in cost and takes 6 feet by 6 feet area and weighs 200lb.
Whatever you may think, in RV world:
1. Heat only can be done with gas/diesel/propane
2. AC consistently only on shore power
3. Cooking on propane
4. You will still be not living consistently in cold areas (like the Rockies) or warm areas (like FL).
5. Most of those long term rviers just hang on campgrounds for the electric power reasons (and sewer hookup).
So, electric RV is a dumb idea and will never be here.
Nonsense, it's already here. You can buy this or other vehicles like it. Or buy some electrical van and convert it.
Anyway, a lower end Tesla can be bought for around 40-50K. It comes with 60kwh of battery and they make a nice profit on them and you are obviously buying a whole car, not just the battery. So your battery cost argument is simply wrong
Cost of batteries actually dropped below 100$/kwh probably quite some time ago for them. So the cost for 100kwh battery would be less than 10K at this point. You are off by an order of magnitude.
These are not light vehicles obviously. But an RV is way bigger than a Tesla and you could probably easily fit 200kwh of batteries in there. Or more. Which is nice for range but overkill for just running the AC or heating. People drive EVs in the arctic circle in Norway. -18C is a nice warm winter day over there. You'd want the heating on, obviously. This is not a problem. It's a solved problem.
The new tesla semi probably has close to a mwh. I think the F150 has 130 kwh and you can run your house on it for days.
Most electric vans have around 60-70 kwh. Which is pretty modest and enough for a modest range. And yet it's plenty for a recreational vehicle although a bit limiting in range probably. If you are going out camping in extreme conditions, you might want a bigger battery than that. But otherwise, it's completely fine for recreational use for normal people as is.
60 kwh at 4 kilowatt gives you 15 hours of heat in a van in cold weather. Granted, you may not need full 4 kilowatt of heat at all tines, so let's say it's one full day. You drive to BigSky Montana to ski and after two days your RV is frozen solid, including all the water and everything is dead and leaking. All you can do at this point is to try and find a shore hookup or an EV charger. But of course the batteries won't even charge because they are too cold.
