Thank you all for the feedback. We have 500 w solar, 2k gennie as backup and a 2k inverter and have dry camped indefinitely in the past. Our plan is to do more boondocking, and to be honest I just NEED to replace the 2-12v but as always thinking of ways to make it “better”. I agree with some here that MOST of these conversations are way more advanced than most users would care about, probably including myself.
I think either way, I’m going to ramp up the number of batteries to 4 and base the rest of the conversation on cost and ease of use.
To be honest, I have only ever touched the 2-12v batteries twice per year (take them out for winter, put them in for summer) and they have lasted 7 years now. But I also have a trimetric battery monitor so keep an eye on them that way I guess.