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Sorry Blake. Didn't see you second post. Yes. Factory battery won't handle it alone for long periods.
I'm gonna call complete bullshit. My ARB fridge has been running 24/7 for the past 5-6 years. It's been on a battery and solar panel on the truck for the past 2. Continuously. So maybe your stock electronics can't handle it but the fridge definitely can.
Sorry Blake. Didn't see you second post. Yes. Factory battery won't handle it alone for long periods.

I thought that's what I said... The truck just won't run it 24/7 because there's a low voltage cut off built in to the fridge. Once the battery gets down to 11v (I think), the fridge cuts off so that you aren't left with a vehicle that won't start. I need to upgrade the battery to a group 31 and I'm probably going to look into a small solar panel I can hook up and throw on the hood for my trip to Arkansas next month.
No really there is got to be a way/space to add 2nd battery
I saw a kit to relocate that emission air pump deal yesterday and they guy wanted a few hundred dollars for some hose, clamps and a small metal plate. For $1200 I would rather buy a full length roof rack, solar panel where the sun roof would go and then an Odyssey or Die Hard battery.To mount a second battery under the hood, it's over $500 just in "relocation" kits to make the battery fit. Then the isolator/management kit, battery, etc. looking at $1200+ to add a second battery under the hood. Not happening anytime soon.
I saw a kit to relocate that emission air pump deal yesterday and they guy wanted a few hundred dollars for some hose, clamps and a small metal plate. For $1200 I would rather buy a full length roof rack, solar panel where the sun roof would go and then an Odyssey or Die Hard battery.
If I were to do a second battery I would buy the Shrockworks dual battery kit and washer reservoir relocation. That's $400. But it won't fit a group 31M battery so I'd run a group 34 on it and extend all my leads over to use it as the starting battery. Then I'd run a Pelfreybilt battery cage in stock location with a 31M as auxiliary battery. That's another $600+ for two batteries and the cage. Then another $250+ for isolator and management system. Figure probably another $100 in power/ground leads, terminals, etc. Add in the cost of solar shit. I'm not dropping $1500-$2000 to have a fridge in my truck right now. Eventually maybe I can justify it but I can't right now. It can go in the camper like originally planned and I'll use the Brute.
I can relate to that. When we camp we normally start and finish the day with a hot chocolate and bourbon cream. It takes the edge off while the coffee is percolating.Not too early at all. Most of us here would say that is rather late.