Refer amp useage

[Texas_Two_Stepp]

Can someone give me a ball park estimate as to how many amp hours a new energy efficient elec. only 12cf refer will use over night under normal summer conditions, say with 85 degree days?

[MrWizard]

ice maker will add more power use

home fridge with cold water, ice dispenser, 20cf etc..
will use more power than the 'AVG' RV replacement option which is usually smaller

33% cycle figure is commonly quoted around here
i think ours is closer to 40% duty cycle
still 'very manageable'

[KD4UPL]

I've measured the draw of many home residential refrigerators. They nearly all use 1.5 kWh per day. At 12v this would be 125 Ah per day. The inverter will add some inefficiency so I'd call it about 140 Ah per day. So, probably 70 overnight.

[MrWizard]

our 8cf pull 9 amps dc whrn runing,
with a 33% duty cycle , a 12 hr overnight cycle uses 36 ampHrs

[ScottG]

It depends a lot on the model. If you plan on boondocking a lot get one with a high energy rating. From what I've seen at Home Depot, they cost about $100 more but if you have to run on batteries it's worth it.

[2oldman]

Perhaps this previous thread on boondocking with a resi will help.

Also this one

[BFL13]

Measured about 15 AH/day with an 8 cu ft on propane with days at 80F. So overnight with a 12 cu ft, my WAG is 7 AH. The fridge propane burner uses 0.5a when actually burning.