30 amp with a/c units?

Hi doug,

I have skin in the game because I am no longer willing to turn off the roof air while I'm cooking on my induction "hot plate".

I have two solutions. One is a Magnum hybrid inverter that allows load support, but can be "tricked" into doing voltage support. It allows me to "dial down" input amperage to the maximum that a 30 amp outlet should be providing (24 amps) for continuous loads.

The other is an autoformer which will prevent damage to the air conditioners (or other loads) from low voltage. (which adversely affects induction cookers, too).

dougrainer wrote:
To the posters that stated yes you can run 2 AC's on 30 amp. YOU have no skin in the game. The correct answer is MAYBE! It all depends on how his RV is wired and if the RV allowed 2 AC units to run on 30 amp. MOST 30 amp RV's do NOT allow 2 AC units to be wired on 30 amp(unless there is an EMS system) Most Towables do not have an EMS system. It depends on the AMP draw of the 2 AC units and IF YOU HAVE AN EMS SYSTEM. It depends on the outside Temps. HIGHER temps will pull MORE amps. So, lets take this example. You are in 80 degree temps. Your AC's pull 13 amps at 95 degrees(spec). At 80 degrees those AC's will only draw 11.5 each for a total of 22 amps. You think great I can run 2 AC units on 30 amp. Lets now go to 100 degree. Those 2 AC units will now draw 13.5 each for a total of 27 amps. Add anything else and you go over the 30 amp threshold. Now, the Breaker will trip? MAYBE. What usually happens is, the line voltage drops and the wiring heats up. LOOK at the 30 amp shore cord end. WHY do they seem to look burnt and corroded/pitted? Because you have been overloading the power supply. Some CG's may have larger than 30 amp breakers on that 30 amp supply. Then add in the fact that most that run 2 AC's on 30 amp use a 50 to 30 amp dogbone adapter. IMO, DO NOT ADVISE PEOPLE TO RUN 2 AC UNITS IF YOU HAVE NO KNOWLEDGE OF THE SYSTEM THEY HAVE. Doug