The fridge runs on propane and takes minimal power when using it.
The information below istaken from http://www.theinverterstore.com/tips.php
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Modified Sine Wave (quasi-sine)
A modified sine wave inverter actually has a waveform more like a square wave, but with an extra step. A modified sine wave inverter will work fine with most equipment, although the efficiency or power of the equipment will be reduced with some.
Motors, such as refrigerator motor, pumps, fans etc will use more power from the inverter due to lower efficiency. Most motors will use about 20% more power. This is because a fair percentage of a modified sine wave is higher frequencies - that is, not 60 Hz - so the motors cannot use it.
Some fluorescent lights will not operate quite as bright, and some may buzz or make annoying humming noises.
Appliances with electronic timers and/or digital clocks will often not operate correctly. Many appliances get their timing from the peak of the line power - basically, the modified sine has a flat top rather than a peak - this may cause the occasional double trigger. Because the modified sine wave is noisier and rougher than a digital pure sine wave, clocks and timers may run faster or not work at all.
Items such as bread makers and light dimmers may not work at all - in many cases appliances that use electronic temperature controls will not control. The most common is on such things as variable speed drills will only have two speeds - on and off.
most equipment will operate without any noticeable difference, and because the lower cost, makes this the most common inverter sold and generally the only type found at your local retailer.
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In cool weather my AC unit drew less than 15 amps.
When I ran it last night in near 90°/90% conditions it was pulling 18+ amps and over 2000 watts according to my meter. I now have no confidence the AC and microwave will run at the same time in hot weather.
-- Chuck
'06 Roo 23SS behind '07 Expedition out of Cleveland Our Photo pages
I have a powermate 3750, rated 3000 continuous, 3750 max - it will not start the AC. Current to run it is one thing, current to START it is another. I also have a powermate 5250 - which runs it all fine. It is very loud, though. Mine were actually bought to run the AC and lights at a remote hunting camp. If I were buying for the RV, I'd spend more on Yamaha or Honda, and keep 'em quiet.
I am running a 3500 Kipor, very happy with it's power, run's everything in our 21ss Roo, is very very qiet, very efficient on gas and very clean power, and spent $999.00 on it. And they are all made over sea's so don't start Honda boy's. Frank
E350 Ford 7.3PSD conversion,3.73 rear end,super chipped, Rockwood Roo 21ss, 3500 kipor generator, 124 inch S&S Roadking, 2 teenage daughters, Boston Terrier (CARMINE)and a good look'in better 1/2, and I'm just big and ugly!! Thank GOD, Life is Good.
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