Photovoltaic Systems

Description:
Photovoltaic panels are made from materials that are light sensitive. When sunlight hits them, it makes the electrons in the panels move. Tiny wires in the panels collect these electrons and create a DC current. Most systems going up now are “grid-tied” which means they are connected to the utility.

Advantage to user:
When combined with an energy-efficient home, PV systems can reduce a homeowner’s electric bill to nearly zero.

Savings to the planet:
48% of the energy used in this country is used to power our buildings. Most of that power is generated by burning fossil fuels, which creates huge amounts of CO2 and air pollution. Solar power produces no greenhouse gases or air pollution.

Solar Thermal

Evacuated tube collector

Description:
Heating water with the sun is such a “no-brainer” that it really is difficult to understand why we all don’t do it. There are several types of solar hot water systems and many can be integrated with other systems to improve their efficiencies.

Advantage to user:
It may sound silly, but what could be more serious than reducing our dependence on foreign oil. Energy from the sun is free. Producing our own power is safer, cleaner and cheaper.

Savings to pocketbook:
Depending on where you live, using the sun to heat water can save you hundreds, if not thousands, of dollars a year. Solar hot water can be used for domestic needs, as well as for space heating.

Savings to the planet:
In China, solar hot water heaters are nearly ubiquitous, everyone has them.