Fridge battery consumption.

[Huntsman]

A 12 volt fridge spec sheet says it draws 40 watts. Running from a 110amp/hr battery.

40w/12v=3.3 Amps

110a/hr battery / 3.3 amps = 33.3 hours run time before battery dead.

At 25 deg C ambient the fridge runs at 25% of the time.

33.3 hours/ 25% = 133 hours = 5.5 days

Is that right?

Fridge cuts off when batter gets down to 10.7 volts, that must have a bearing on it.

[Huntsman]

Simpo Two said:

Peltier or compressor?

I don't think you'd want your batteries down to 10.7V.

I turn my fridge (Waeco 50) off at night and move a freezing pack from the ice section to the fridge section. That keeps it fine until morning, indeed colder sometimes! - when I switch it on again and put the pack back to freeze.

Thanks.

Compressor.