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obiwancanoli's avatar
obiwancanoli
Explorer
Aug 25, 2021

Absorption vs. Residential refrigerator

My current rig - a 2017 Newmar Ventana LE - has a 12 c.f. 4-door refrigerator/freezer. Runs on 120 or propane, and simply does not keep the ice cream cold enough, and even at the highest setting, previously frozen foods begin to thaw, though only slightly. Temporary solution to this was the acquisition of a Dometic portable cooler (75DZ) that does a much better job of keep the ice cream in an acceptable state.

The issue for me is this: I'm considering trading up to a new MH, and my research suggests most if not all new coach's come with residential all-electric fridge. Since I boondock often, and will continue to do so, I also plan to move my current Battle Born Lithiums to the new coach (100Ah each, 4 total). I currently also have about 600 total watts of solar, and have room for another 600 watts (3 panels), and it's a given that I'll probably have an equivalent wattage output for solar on the new rig.

I'm attempting to learn as much as I can about the differences between Residential vs. Absorption fridge's, and why I would want one over the other. Capacity isn't a big issue for me, but I wouldn't want to go smaller than what I already have... To be sure, I'll be spending time at traditional RV parks with shore power, but again, there's the ice cream thing... I'd very much appreciate your insight and experience in guiding me toward the knowledge level I seek to make an informed decision - TIA! 

Michael

21 Replies

  • I'll never go back to absorption and primarily boondock. Usable space and cooling are superior in all conditions and at all elevations. You don't have to worry about being even remotely level and they're far more dependable/ less finicky.

    I replaced the 7.5cu. ft absorption fridge in our truck camper with a 9.8cu. ft. apartment fridge and it uses 1.0-1.3kWh/day.

    I replaced the 13cu. ft. absorption fridge in our fifth wheel with a 17.5cu. ft. counter-depth residential. It uses 1.6-1.9kWh/day, and we use the ice maker extensively as well.

    I'd consider more solar and a larger battery bank... but don't like having to depend on a generator. 600W of panels might yield 3kWh if you're extremely lucky in the winter. Probably under 2kWh. Each Battleborn is roughly 1.2kWh, so not accounting for any charging, your fridge will deplete 1-2 batteries each day. Assuming you don't want to deplete your batteries each night and you want to be able to sustain through at least some inclement weather, you probably want a bank of 6+ batteries and triple the array.