How to calculate the amount of kilowatt hours (kWh) your solar panel system will produce

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Published on January 13, 2012 by Dan Hahn.
Categories: Buying Solar.

calculator How to calculate the amount of kilowatt hours (kWh) your solar panel system will produce

Interested to know how many kilowatt hours (kWh) your new solar panel system will kick out per year? All you gotta do is multiply the size of your system in kW by 78% of the number in the shaded region you live in the map below. Then, bingo you’re good to go!

kwh map How to calculate the amount of kilowatt hours (kWh) your solar panel system will produce

For example, let’s say you live in Arizona and are thinking about installing a 5kW solar system.

For the sake of the example, lets say you’re living in the “2000″ shaded region.

Next, multiply 5 (since you’re considering a 5kw system) by 1560 (78% of “2000″ is 1560) to arrive at 7800 kWh.

That means on average your system will offset 650kWh from your monthly electric bill (7800 divided by 12 months equals 650 kWh).

If you’re paying $0.11/kWh, that amounts to $71.50 saved per month ($0.11 x 650 kWh = $71.50)!

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