If I buy a $300 50-watt solar panel & install it on the roof of my family's home, how long will it take for the panel to pay for itself in electricity savings?
by 
Egao No Genki
ANSWERS: 5
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If you assume that you get say 6 hours of usable sunshine per day, say 200 days per year, and electricity costs 12 cents/kWh: (300 / 0.12) = X * 6 * 50 * 200 2,500,000 Wh = X * 60000 X = 41.6 years. Ouch.
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It depends on how much sun you receive where you live and what season of the year you are asking this question! It also depends on how much the current rate structure you are using for power!
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Hey you can also google these stats for more exact value!
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some home owners are able to sell the utility company energy hours, so the gain happens quicker. besides, the first time you lose power due to a national emergency, then it will pay for it self even quicker. other people say, you need aux deepcel batteries and generators to do the system right. the generators recharge your batteries. the solar power keeps the batteries at peak power. one morning with visiting friends can deplete the batteries.
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It depends greatly on tax incentives in your state, also on whatever the carbon price will be set at. +3
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