Photovoltaic houses

Subsidies have a mixed history of success. But with the California Solar Roofs bill (SB1) currently under debate in the California State Assembly, there are expectations that this government initiative will make photovoltaic technology affordable for everyone. Jesse Quay from Sun Light and Power explains the economics and technology behind solar photovoltaic panels.
Yet, we still don't know how the sun powers Superman... ;)
Science, Technology