Difference between revisions of "Solar"
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==calculator== | ==calculator== | ||
A KW worth of panels will produce about $190/year of electricity on my roof. | |||
In 15 years that's about $3000 worth of electricity so to break even you need installed cost to be < $3.00/watt. | |||
If you could install a 1KW system at $2.00/watt you make a return of about $66/yr or $66 on a $2000 investment or about 3.3% annual interest on your investment. | |||
[http://rredc.nrel.gov/solar/calculators/PVWATTS/version2/inputv2.cgi?Cell_i_d_=0274366&Latitude=42.098&longitude=-70.92&State=Massachusetts&Electric_r=14.614 02130 calculator] | [http://rredc.nrel.gov/solar/calculators/PVWATTS/version2/inputv2.cgi?Cell_i_d_=0274366&Latitude=42.098&longitude=-70.92&State=Massachusetts&Electric_r=14.614 02130 calculator] | ||
At 30 degree tilt the average solar is <math>4.29\frac{kWh}{\frac{m^2}{day}}</math> The bedroom roof would probably produce around $220/year at $.15/kwH | At 30 degree tilt the average solar is <math>4.29\frac{kWh}{\frac{m^2}{day}}</math> The bedroom roof would probably produce around $220/year at $.15/kwH | ||
Revision as of 16:03, 20 December 2012
calculator
A KW worth of panels will produce about $190/year of electricity on my roof. In 15 years that's about $3000 worth of electricity so to break even you need installed cost to be < $3.00/watt.
If you could install a 1KW system at $2.00/watt you make a return of about $66/yr or $66 on a $2000 investment or about 3.3% annual interest on your investment.
02130 calculator At 30 degree tilt the average solar is <math>4.29\frac{kWh}{\frac{m^2}{day}}</math> The bedroom roof would probably produce around $220/year at $.15/kwH
existing use
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