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Batteries
I have a 2020 3121 with residential frig, I installed 2 200 amp hr sok lithium with built in heaters. I do a lot of overnights at harvest host and can go 20plus hours with just the frig. Just changed converter switch to lithium. Est. Cost around $1000.
You can’t drain a wet battery to 0%,but you can lithium, if you have to, and not damage it,you get twice the amp hrs. If needed,
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