I have owned this inverter for 4 years. It has operated flawlessly, and protected itself many times over with its sophisticated electronics. The 3000 watt units are powerful. Currently mine is pushing a 1 horsepower well pump at 70 % of its capacity. Best of all they are quiet and have a termostatically controlled fan which, if left in a cool place should not operate that often. Highly recommended for the money. The only down side is the instructions are written at third grade level, but this is a foreign product so, oh well

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