What is Solar PV?

Solar PV - photovoltaic - solar panels which produce electricity when exposed to light. Also called pv modules, pv cells and solar modules.

Why PV is Important

Photovoltaics (PV) as a solar energy technology, has numerous environmental benefits. As a domestic source of electricity, it contributes to the nation's energy security.

Few power-generation technologies have as little impact on the environment as photovoltaics. As it quietly generates electricity from light, PV produces no air pollution or hazardous waste. It doesn't require liquid or gaseous fuels to be transported or combusted. And because its energy source - sunlight - is free and abundant, PV systems can guarantee access to electric power.

What does a typical PV system look like?

A typical PV system consists of solar cells connected electrically to form a module that can measure two to four feet wide and four to six feet long. Some solar modules look just like traditional roof shingles. Many interconnected PV modules are called an array. An array is often mounted on the roof of a building, facing south at an angle, so that the modules receive the maximum amount of sunlight. Other typical features of a PV system are an inverter, which changes your electricity from direct current to alternating current so it can be used by most standard appliances and computers. Batteries may also be added for emergency backup in the event of power outages or in cases where your PV system is not connected to utility power lines. If your electricity consumption exceeds generation by your PV system, you simply obtain the needed electricity from your utility, as usual.