Originally Posted by Wire
So if the dealer puts in one 12v battery, that's normal and reasonable?
It's really up to negotiation. Most units will come with at least a single battery and generally some basic starter items - some propane, shore power cord, water hose, sewer hose, etc. But again, it's really all negotiable with the dealer as far as what they "include" in the price.
As far as a battery setup - you are certainly correct regarding the vast amount of information out there. It really comes down to YOUR particular needs. If you plan to do extensive boondocking and want to run your resi-fridge, TV, microwave, and maybe even AC, then you're going to need a beefy setup, most likely with a generator and solar setup. But if you're just looking to make sure you have enough juice to keep the fridge going if you lose power for a night in a campground, then that's a different story.
I only know enough to be dangerous myself as this point - I've been travelling extensively in our 377 RLBH for the last year with only the single 12V battery we got when we bought it. We have a generator also that I've only fired up a few times just for maintenance recommendations. We've stayed exclusively in campgrounds with power, so it hasn't been an issue. That said, I do plan to do some boondocking over the next year so I'm going to get a good setup in place, starting with four 6V batteries and a couple solar panels. I'm weighing the cost vs. weight vs. performance vs. longevity of lead acid vs. AGM vs. lithium....it is indeed a bit overwhelming.
The two most thorough sources I've found online thus far are:
and, Handy Bob
Hope that helps.