Performance

Solar PV

Solar Thermal

System

Electric, 2.6KW, Installed

Hot Water, 2 Collectors

Yearly Output

3820 KWH per year (PV Watts using manufacturer data)

3880 KWH per year (Retscreen using independent data)

Required Roof Space

210 square feet (assumes Suntech 170 watt panels)

64 square feet

Installed Cost

$20,800 to $26,000 ($8 to $10 per watt)

$7500 to $8500 (new home, retrofit is more expensive)

Oversight by Standards Body

No

Yes (the non-profit Solar Rating and Certification Corp)