Organic City Project : Moving into a Culture of Sustainability
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Solar Energy

Assessing Solar Needs
 


The size of a solar electric system is expressed in the number of kilowatts generated by the system per hour of full sun.

The typical electricity bill is in kilowatt hours (KWH) per month. To find the yearly usage either add up the bills for the last 12 months or find your estimated usage by multiplying 1 month by 12.

To estimate the size of the photovoltaic system, the yearly kilowatt usage is divided by the number of full sunlight hours.

Yearly KWH usage/ Yearly # of hours of full sun = PV system requirements.

 


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Links

Energy Star:
www.energystar.gov/

Green Energy Certificate:
www.eere.energy.gov/greenpower

US Department of Energy, Renewable Energy and Energy Efficiency:
www.eere.energy.gov/

 

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