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Showing posts from January, 2009

Cable Box Electricity Consumption and Cost

Today I got around to measuring the electricity consumption of the cable TV box that is in my home - a Comcast Motorola DCT-3412. It's an HDTV Cable TV box with DVR.


Is this "powered off" cable box costing American taxpayers hundreds of millions?
I measured the box's consumption by plugging it into my awesome Kill -A-Watt power meter and measuring the wattage.
Surprisingly, I found that my cable box consumes just about as much power when "off" than when "on"!
Here's what I measured with my Kill-O-Watt meter: "Power Off": 30 wattsWatching TV: 31 wattsRecording TV: 31 wattsPlaying back a recorded program: 31 watts Why provide a power button when it makes so little difference in power consumption? Who knows!
Electricity Cost
So I did some math to figure out how much 30 watts of consistent power use costs, using recent prices for electricity around here:
(17¢ per kwh x 30 watts x 8760 hours per year ) / 1000 = $44.67 per year
Amazin…