rothskeller
New member
- Joined
- Jan 7, 2018
- Posts
- 4
I'm researching to buy my first RV, and there's something I don't understand. Several of the manufacturers offer lithium battery systems that, as far as I can tell, have sufficient capacity and sufficiently fast recharge that they could reasonably power all of the RV systems ? heat, A/C, cooking, hot water, etc. For example, the Roadtrek/Hymer models offer 400Ah Lithium batteries that recharge in under an hour. So why, then, do virtually all of these RVs still have propane systems as well? In my research ? which was limited to class Bs under 22' length, my purchase criteria ? I found only a single model that was all electric (the Winnebago Revel). And it doesn't suit me for unrelated reasons.
Have I misunderstood something about the power needs? Let's say a ceramic electric space heater runs about 1500W, and let's figure it runs 50% of the time for 6 hours a day. (The rest of the time, I'd either be driving or out doing something, not in the RV.) So, if I've got the math right, that's 375Ah for a day. Add in the various other power consumers and let's figure I'd need to charge the batteries twice a day. Roadtrek says that takes about half an hour (200A charge rate, parallel across four 100Ah batteries). Running the engine for half an hour, twice a day doesn't seem too onerous? (And maybe less than that, with solar?)
It's pretty obvious I'm missing something fundamental here; the entire class B market can't be completely wrong: there must be some reason why everyone still runs propane. Can someone clue me in as to what I'm missing?
Have I misunderstood something about the power needs? Let's say a ceramic electric space heater runs about 1500W, and let's figure it runs 50% of the time for 6 hours a day. (The rest of the time, I'd either be driving or out doing something, not in the RV.) So, if I've got the math right, that's 375Ah for a day. Add in the various other power consumers and let's figure I'd need to charge the batteries twice a day. Roadtrek says that takes about half an hour (200A charge rate, parallel across four 100Ah batteries). Running the engine for half an hour, twice a day doesn't seem too onerous? (And maybe less than that, with solar?)
It's pretty obvious I'm missing something fundamental here; the entire class B market can't be completely wrong: there must be some reason why everyone still runs propane. Can someone clue me in as to what I'm missing?