Solar & Electrical tips, usage equations and examples by http://www.SHTFM.com

120 volts ac is the normal household voltage of small appliances in america.
A kilowatt hour is how they charge you for your electrical consumption, out of the 50 states .12 cents per kilowatt hour being the average U.S.A. Hawaii has the highest residential rate per kilowatt coming in around .28 cents per kilowatt hour and Washington (STATE) has the lowest coming in around .08 cents per kilowatt hour. Now go grab last months bill and see what your total was that you used and then add that up with out the surcharges and fees then tack on an arm and leg and you can see where we are headed with this article.

Now some educational facts :
Kilowatt Hour -

The kilowatt hour, or kilowatt-hour, (symbol kW·h, kW h) is a unit of energy equal to 1000 watt hours or 3.6 megajoules.
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