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Paloma Hill

Kill A Watt Electricity Usage Meter P4400

Written May 20, 2008

not accurate

I have a high quality multimeter that reads AC amperage and voltage very accurately and there is correct relationship between the Amperage * voltage result and the Kill a watt power meter result. In fact, the Kill a watt own amperage reading times voltage is also not matching it's wattage reading. I understand that VA is not always equal to watts in the case of an inductive load - like a big motor - but in all cases I find that the kill a watt meter is significantly lower than it should be - by as much as 20%. I think this meter is cheap for good reason.

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