Yes, Rocket was low by a factor of 7. My guess is he used a 1 amp draw
rather than the 7 amps the fridge takes. So his 30AH battery really
needs to be 210AH, a massive capacity to fit into a Westy.

Mark

Karl wrote:
> I calculate that usage at 33.6 a/h per day. 24 x 7 = 168 , divide by .2
> = 33.6.
>
> Rocket J Squirrel wrote:
>> Hi Malcolm.
>>
>> A 24-hour run of your refrigerator, if it draws 7A, and has a duty cycle
>> of 2/10 (two minutes out of ten) will consume 4.8 amp-hours (Ah) per day.
>> So if your numbers are correct, and if you wanted to never discharge your
>> deep-cycle batteries too deeply (say never less than 80% discharged so
>> they last longer), then a five-day run of (call it) 5Ah per day would
>> require 25Ah, and a battery with a 30Ah rating should do the job.
>