rrupert wrote:
If you have a 3 way fridge, which sounds like you do, it can draw more power, 15 amps, than your truck may be supplying to the battery.
I'm thinking you arrived without a fully charged battery because of the fridge. Charge lines are notoriously undersized on vehicles for unknown reasons, a larger gauge wire would help. if you have room, add a second battery.
I agree... driving with the fridge in 12v mode the battery will slowly die while traveling normally...
My advice is never run fridge on 12v... run on propane... That plus cold temps reduced your capacity as stated...
probably best to check battery voltage or electrolyte at campsite when you arrive. Then you will know what your starting with...
Do this before you buy a second battery...
Last what battery do you have? This makes a difference... 80 ah group 24 should be minimum for 1 day...