The elegiacal power consumption of a 2 way or 3 way fridge, when run on electricity (either 12vdc or 120 vac, the watts are the same) ranges from ~200-350 watts, depending on size.
300 watts on 12 vdc is 25 amps, so running the fridge of 12 vdc while the engine is running is fine, even with 100 amp alternator, unless your batteries are chronically dead.
Icarus
300 watts on 12 vdc is 25 amps, so running the fridge of 12 vdc while the engine is running is fine, even with 100 amp alternator, unless your batteries are chronically dead.
Icarus