Forum Discussion
ktmrfs
Aug 03, 2014Explorer II
JiminDenver wrote:
Unfortunately the derating of generators at altitude is a subject I am all to familiar with. On a hot day you can lose 4% per 1000 ft. My 55a converter ppulls 975w I believe so a 2000w inverter generator running at 1600w minus roughly 30-40% will have a hard time running it. I shut off our converter when we got solar.
With the air conditioning I found 2800w inverter generators stop having the ability to run it around 8-8500 ft. My 3500/4000 will do it at 10,000 ft but only with the converter off. A Yamaha 4500w inverter generator would do it but they are big, heavy and really expensive. A pair of Champion 3100i paralleled would be the less expensive choice but what a PITA to deal with two big generators.
altitude plus the poor power factor of most converters = possible problems. the 55A PD may draw 975W, but closer to 1100-1200 VA. The 65A PD draws about 1400VA, not much margin with a honda 2000VA max, 1600VA continous rating.
Even at 6000-7000 ft two honda 2000's are only "adequate" for starting our AC on a hot day, no eco mode starting like at near sea level. Before I got solar, pulling into a campground on a hot afternoon after driving all day, it's lets get the trailer cooled down, then we can think about charging batteries. At least now I can start charging the batteries on solar while the AC is cooling down the trailer.
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