Quote:
Originally Posted by Chance
Correct, NOT ALL AIR CONDITIONERS ARE THE SAME. People keep ignoring this. Some require around 10 Amps and others over 15 Amps at rated conditions. Multiply by two and compare to 30 Amps and it’s easy to see different results.
Thor and other manufacturers are building motorhomes with two 11,000 BTU/hr Power Saver air conditioners that run on 30-Amp service or 4,000-Watt Onan. However, when you want to run another large load like the microwave, one of the A/Cs has to be turned off first. On new 30-Amp motorhomes with two Power Savers this is done automatically by power management system, but you could do it manually.
I’d first look at existing air conditioner specifications to see how much power it requires, then decide how to proceed from there.
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Very true. I have a Coleman Mach 3 PS (13,500 BTU) up front and a Coleman Mach 8 in the rear (13,500 BTU). The Mach 3 PS draws 12 amps @120 volts on a 100 degree day in the full sun and the Mach 8 draws 14 amps @ 120 volts. I have a Progressive EMS (50 amp) so I can monitor each of the coach's legs. I still have enough overhead on the Onan 4000 to run the RV frig on electric. Cycling is not a problem. If you don't have a Magne Shade or Reflectix on the windshield, the front 5 feet always stays hot. Ceramic windshield coating also helps but not as much as the Magne Shade. By the way it is going to be 105 here today and 108 tomorrow
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