Some good reading on the subject - search Google for "The 12V side of life" and read all of the comprehensive info there. Basically, he talks about a "power budget" (your daily usage of electricity) and how many batteries and what type you will need, plus then he gets into the solar discussion. With solar, you will want to overengineer to take into account rainy days and angles, permanent mount vs. portable, plus look at the types of controllers and the max input/output and how they manage the charge cycle. Much factors into the discussion.
If you just add solar to your roof with 2 original sealed lead acid batteries (maybe 100 Ah total) it is probably a waste of money.
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John
2016 Thor Hurricane 35C with pups Piper and Annabelle
2013 Ford Fiesta toad
FMCA - F457085
Blog - https://traversity.us
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