110v Residential fridge install

westend wrote:
FYI, a watt is a unit of measuring power/ It's useful to use when in discussion of electrical devices because they're commonly measured in wattage consumed.

Yes, your consideration of efficiencies is valid. Fortunately, my inverter draws less than 500 ma when idling. ...
From the battery monitor, I'm seeing 40-60 AH used by the fridge, daily. It depends on how much it's loaded, door opening events, and the ambient temp.

Westend, watt is a measure of power, and WH is a measure of energy, ans so is AH. You know that, I know that, everybody knows that :)... People on-grid measure in AC WH, but we in battery world measure in DC AH in/out. Because battery SOC is what matters, at the end of the day (or, rather, by the end of the night, for solar users).

Anyway... 40-60 AH for a 4-5 cu.ft. dorm fridge sounds about right. Yes, bigger box is easier to cool in terms of energy per cu.ft, but there are MORE cu.ft to cool, more food. Can 2.5 times bigger box, loaded respectively with 2.5 times more food, draw same 40-60 AH? This would mean 2.5 times better efficiency of cooling system, box insulation, - everything. I don't believe in miracles - not in heat engineering. Load enough food for 10 cf box, include 10-12 AH inverter idling losses (this is with your very efficient inverter), another 7-15% inverter conversion losses, and you have 80-100 AH a day for fridge-inverter combo alone. But this is just an estimate, I'd like to see actual measurements.

OP - yes, Whirlpool changed the design recently, making the door much thicker (without increasing the door storage space inside). This is how they got their Energy Star rating, I guess. Thicker door - less losses. Now, I am not a plumber, but I don't see why you can't offset your plumbing vent with a flex section or rigid elbow. After all, this is just an air.