Those of you looking to power a CPAP, look into running it off 12v DC. I have a 220 Wh battery pack and it'll drive the CPAP 4-5 times longer off DC than it will through the inverter. (10 times longer if you leave the humidifier portion off)
FWIW, 2000 watt inverters will run a microwave or coffee maker by itself.
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