My 76 Surf Side was largely rewired by a marine electrician who installed deep cycle battery
and sophisticated multi-stage charger. The fridge
(original0 has the ability to run on 12V or 115V or Propane
. The electrician told me there was no need to switch back and forth from 12V to 115V when switching from the deep cycle or when attached to the tow vehicle when I then plug into shore power. So I stopped doing this unnecessary step and leave it on 12V at all times except the rare occasion when I use propane
Why is the performance (cooling) so pathetic when being towed or sitting at a camp site running on the deep cycle, compared to the very efficient cooling when attached to shore power. I would have thought that if on 12V setting the shore power is being reduced to 12V. I thought that 12V is 12V and it should make no difference if it is backed up by shore power or not?
Can anyone explain this in baby talk for the electrically challenged. Would like to understand.