Your first step is to replace the batteries the ones Thor installs are junk. Especially if they are the all black Harris batteries. In the case of batteries name brand really means something. And Interstate are some of the best, that’s what I got and they are 1000% better than the factory ones. I don’t boondock much, and I have an older 34J without the residential fridge, but my Harris batteries would die overnight too, and they could barely run my slide. Go with some Interstates. Did they move the batteries in newer models? My batteries are to the left of the door with the pump for the jacks. I could easily fit another battery in the compartment, and it would be tight, but I might even be able to squeeze in a 4th battery.
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