Philadelphia Million Solar Roofs Community Partnership
The Philadelphia Million Solar Roofs Community Partnership is a collaborative of local organizations, businesses, and government agencies committed to helping the five county region of Southeastern Pennsylvania contribute over 500 new solar energy installations by 2010 . Community partners include local energy providers, utilities, solar energy system designers, installers, government representatives, and community based energy experts. The Philadelphia MSR Community Partnership serves as the central point of contact, information clearinghouse, and facilitator for the Million Solar Roofs program in the region.

How Solar Cells Work (How Stuff Works.com)
The solar cells that you see on calculators and satellites are photovoltaic cells or modules (modules are simply a group of cells electrically connected and packaged in one frame). Photovoltaics, as the word implies (photo = light, voltaic = electricity), convert sunlight directly into electricity. Once used almost exclusively in space, photovoltaics are used more and more in less exotic ways. They could even power your house. How do these devices work?