A unit of volume equal to 1 cubic foot at a pressure base of 14.73 pounds standard per square inch absolute and a temperature base of 60 degrees Fahrenheit.

A unit that equals 20 long hundredweight or 2,240 pounds. Used mainly in England.

To price and sell greenpower/electricity higher than that produced from fossil or nuclear power plants, supposedly because some buyers are willing to pay a premium for greenpower.

A solar photovoltaic device with a specified area.

Restrictions on the use of a property.

The process of storing, or converting energy from one form to another, for later use; storage devices and systems include batteries, conventional and pumped storage hydroelectric, flywheels, compressed gas, and thermal mass.

A turbine that has a runner with attached blades similar to a propeller used to drive a ship. As water passes over the curved propeller blades, it causes rotation of the shaft.

The tendency of the sunlight to electricity conversion efficiency of amorphous silicon photovoltaic devices to degrade (drop) upon initial exposure to light.

The transfer of heat by means of air currents.

A unit of illuminance; equal to one lumen per square foot.

The minimum temperature at which sufficient vapor is released by a liquid or solid (fuel) to form a flammable vapor-air mixture at atmospheric pressure.

The total distribution of electromagnetic radiation emanating from the sun. The different regions of the solar spectrum are described by their wavelength range. The visible region extends from about 390 to 780 nanometers (a nanometer is one billionth of o ...

Salt mixtures with potential applications as solar thermal energy storage materials.

The apparent angle of the sun north or south of the eath's equatorial plane. The earth's rotation on its axis causes a daily change in the declination.

A measure of the quality of a light source by expressing the color appearance correlated with a black body.

The potentially useful byproducts of ethanol fermentation process.

A heating unit where heat is distributed by means of convection or fans.

A source of power (electricity) that can displace power from another source so that source's power can be transmitted to more distant loads.

A tax credit granted for specific types of investments.

A curve on a chart showing power (kW) supplied (on the horizontal axis) plotted against time of occurrence (on the vertical axis) to illustrate the variance in a load in a specified time period.