Ray said:
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But come on now, if you're going to go to all this effort to safely transmit rather dangerous 110 Volt power to the trailer, why not simply run an 8 or 10 gauge conductor directly from the TV's battery (or alternator) to the Bargman connector on the TV?????? The only protection you will need is a simple 30 amp self-resetting circuit breaker in the engine compartment. If you run the wire along the bottom of the TV, it should not take you more than 20 or 30 minutes total...and that's allowing time to properly secure the wire so it won't fray or be caught by road hazards.
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Ray I surely agree it sure sounds Rube Golberg. However, even if you had a dedicated separate #8 wire from the TV battery to the TM battery, with NO CONNECTORS, the 12A feeding the refrigerator would cause about 0.5 Volt drop (assuming 60 feet of wire round trip) If TV battery fully charged is 12.7 V, this would put the TM battery voltage at 12.2 V which is about 60% charged battery. I agree running separate 110VAC is bad idea. A separate 12V #12 gauge circuit from TV battery to run the refrigerator would solve the problem since the TM battery would then see the full 12.7V of the TV battery. The refrigerator would see about 12.5 V which should be OK. Again, this is a kluge. There seems to be no easy answer. Fun to discuss though.