Kill A Watt
This device measures the amount of energy used by whatever you plug into it. I own one myself and it has finally answered questions like…
“How much are these Christmas lights actually costing me?”
“If I turn the fridge down one notch, how much money per month will it save?”
“How much is my TV being on standby when its off costing me per month?”
It also has other test modes useful for other diagnostics - voltage / amperage / kw-h / time
It does have a limit of 15 amps so you won’t be able to use it on your clothes dryer - but just about everything else is fair game.


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