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PV System Economics
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Photovoltaic System Economics
Are you thinking about putting a photovoltaic (solar electric) array on top of your house and disconnecting your electric company? Or, of staying attached to the grid and selling electricity back to them? This worksheet does a simple, "back of the envelope" calculation of PV system economics (please do a more careful sizing before you buy something!), and can help you understand the various tradeoffs that may be involved in using this increasingly popular renewable energy technology.
Enter information about your electricity consumption, your cost of service, and your local sunshine, and the spreadsheet will help you predict the effectiveness of installing a photovoltaic system. You can click on the "?" button in any table entry for more explanation and help.