Solar power generates electricity with no global warming pollution, no fuel costs, and no risks of fuel price spikes, and has the potential to help move the country toward cleaner, reliable, and affordable sources of electricity.

Small-scale solar photovoltaic (PV) systems, typically on rooftops, account for the majority of solar installations, while large-scale PV systems and concentrating solar power (CSP) systems constitute the majority of solar's overall electricity-generating capacity.

via Solar Power on the Rise: The Technologies and Policies behind a Booming Energy Sector (2014) | Union of Concerned Scientists.