My RV system

[medic5678]

Look a few posts up and you can see the link to the one I bought on Amazon. For batteries, I'm temped to buy 4 of those $100 sam's club golf cart batteries. I've read where people are getting several years on those. I think I'm resigned to the *no* solar AC rule here. I'll just have to run my little generator at night if I want AC.

[ewarnerusa]

Yeah, sorry I missed the answers you had already provided earlier in my first pass through the thread. The 5 kBtu air con you mention is certainly less of a power hog than the standard 13.5kBtu ones that are common in the RV industry. But I do think that without going very big like Sunking describes, it just isn't practical.
Something else to consider, 12V batteries don't experience quite the voltage drop under heavy load that series 6V batteries do. So if you're going to be using your inverter to run high draw items like the microwave, a pair of 12V may perform better than a pair of 6V. Using 4 batteries can maybe make this a moot point, but if you try cooking with your 700 watt microwave when you batteries are already partially discharged then it might be relevant. That 700 watt microwave will still probably required 1000+ watts input power. It will say on its label. In my short time on this forum I have learned that some here are not supportive of multiple 12V batteries in parallel from a safety perspective, but it is not uncommon in RVs.