Powering fridge in 4wd with no aux battery

Submitted: Monday, Aug 29, 2022 at 17:46
ThreadID: 144661 Views:6044 Replies:10 FollowUps:19
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My stepson wants to run one or maybe two three way fridges on 12 v while driving, then when stopped he will run them on gas. He does not have an auxiliary battery or dcdc charger.
I am somewhat concerned!!
I do have a Redarc SB12 isolator that he could use which should?? prevent draining the battery if/when he stops and forgets to disconnect fridge/s.
He would need 11AWG wire for one fridge and 8AWG for two assuming both pulling 10 amps.
Can an alternator on a 2004 Patrol handle a load of 10 or 20 amps to run fridges?
What can cause problems here or is this actually feasible?
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