Those privately or publicly owned establishments that generate, transmit, distribute, or sell electricity.

A configuration of an electrical circuit in which the positive lead is connected to the negative lead of another energy producing, conducting, or consuming device. The voltages of each device are additive, whereas the current is not.

A corporation, person, agency, authority or other legal entity that owns and/or operates facilities for the generation, transmission, distribution or sale of electricity primarily for use by the public.

The amount of heat in a quantity of matter at a specific temperature and pressure.

The amount of heat that a material can absorb and store.

The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.

An electric current induced by radiant energy.

The difference between the total cooling effect and the dehumidifying effect.

A measure of the effective cooling capacity of a refrigerator, expressed in Btu per hour or in tons, where one (1) ton of capacity is equal to the heat required to melt 2,000 pounds of ice in 24 hours or 12,000 Btu per hour.

A component of a water heating system that opens at a designated temperature or pressure to prevent a possible tank, radiator, or delivery pipe rupture.

A device or media that absorbs heat for storage for later use.

A unit or measure of solar radiation; 1 calorie per square meter or 3.69 Btu per square foot.

The generation of an electric current, when two conductors of different metals are joined at their ends to form a circuit, with the two junctions kept at different temperatures.

The amount that the voltage, current, and/or power output of a solar cell changes due to a change in the cell temperature.

A wheel that is designed to use the weight and/or force of moving water to turn it, primarily to operate machinery or grind grain.

A type of cooling system that uses a charging and discharging cycle with a thermal or latent heat storage subsystem.

The thermal energy used in an industrial process.

A way of joining photovoltaic cells or modules by connecting positive leads together and negative leads together; such a configuration increases the current, but not the voltage.

A type of solar thermal collector in which a heat transfer fluid drips out of header pipe at the top of the collector, runs down the collector absorber and into a tray at the bottom where it drains to a storage tank.

Space cooling achieved by shading, natural (unassisted, as opposed to forced) ventilation, conduction control, radiation, and evaporation; also called passive cooling.