Go Power! GP-SW3000-24 3000-Watt Pure Sine Wave Inverter

The packaging was good, and the unit arrived without damage. I hooked it up to an oscilliscope to verify the waveform, and then tested it with various loads (resistive & inductive) and appliances up to 4200watts (briefly). The unit held a good sine wave throughout all the testing, although the voltage dropped a little (from 120.4V to 112.0V) at the high output, which is normal. There is a slight distortion in the wave as it passes through the 0-volt point, but well within the

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