Quote:
Originally Posted by Beau388
Several more things to consider: ambient temperature and altitude. The Onans are rated at 500 ft ASL and 75 F degrees. Both factors reduce the generator's output considerably (3.5% per 1,000 ft altitude and 1% per 10 degrees). There is the distinct possibility that when you try to pull 25 amps out of the generator, you will find the voltage to be around 112 volts and not the anticipated 120 volts (7% more amps required). Another is a problem with A/C short cycling. My Mach 15 will occasionally stall the Onan 4000 when it short cycles on a hot day (105 F ambient).
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Excellent points! Altitude does make a BIG difference.
On the short cycling, just make sure you're always running full cold and keep the thermostat super cold too when it's really hot. If the coach actually DOES get cool enough inside, just turn the AC and gen completely off for awhile. (awhile meaning more than 30 minutes.) I try to never let it cycle on and off if temps are really hot. It's harder on both the AC and generator to cycle under high temp/load situations.
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