Amps/hr for 50 litre 12v fridges ?

I'll guess that, when the compressor is running, about 4A. The difficult question is... how many hours per day will the compressor run? That depends on external issues such as ambient temperature, additional insulation, how many times you open it...?

Mike Harding

We use two Waeco's, one as a fridge and the other as a freezer. They both have the same compressor even though one is a 40l and the other is a 50l. When running they each draw between 3.0 and 3.3 Amps. If you use the worst case example, then you will use 3.3A/H for the freezer and a bit less than half of that for the fridge. This assumes a worst case duty cycle of nearly 50% for the fridge.

So if you allowed for 5.0 A/H in your calculations or 120A/H for a day you would be way over the top, but it would enable you to calculate what energy you need to replace.

Now for the reality. The duty cycle is usually much less than above if the fridges are out of direct sun and well ventilated. Ours have never exceeded 68 A/H for a single day of use. (Our solar regulator keeps a tally of incoming and outgoing A/H.)

Cheers,

Russ

Birdy results are conflicting as there are so many variables.
.86Ah is on the conservitive side & in reality closer to 1.2Ah, a freezer may use around 1.5. As an example a 40L fridge will not last 3 days on an 85Ah deep cycle battery in 30 degree heat. When working out battery or sloar panel sizes, allowance will need to be made for hotter days which can almost double consumption depending mainly on the fridges insulation & ventalation.
If space allows it would be more efficient to have one larger fridge/freezer combination unit than 2 separate ones.
Cheers Craig........

Engel draw a max of 2.5 amps/hr in a 40L fridge. 4.2 in a 57/60L fridge or fridge/freezer combination. Many people have gone Engel over Waeco for the edge on consumption they have.