The ability to send or wheel electric power to a customer over a transmission and distribution system that is not owned by the generator (seller) of the power.

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

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.

The process of implementing measures to reduce peak power demands on a system.

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 incandescent lamp with an interior coating of aluminum that reflects light to the front of the bulb. They are designed to spread light over specific areas.

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 product of crude oil that is used for space heating, diesel engines, and electrical generation.

The thermal energy used in an industrial process.

Any material that has a limited capacity for conducting an electric current. Certain semiconductors, including silicon, gallium arsenide, copper indium diselenide, and cadmium telluride, are uniquely suited to the photovoltaic conversion process.

A solar energy concentrating technology that uses a linear receiver that tracks the focal area of a reflector or array of reflectors.

The fine liquid or solid particles contained in combustion gases. The quantity and size of particulates emitted by cars, power and industrial plants, wood stoves, etc are regulated by the U.S. Environmental Protection Agency.

An electric current induced by radiant energy.

A power source/generator that operates independently of or is not connected to an electric transmission and distribution network; used to meet a load(s) physically close to the generator.

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

The change in the power available in the wind due to changes in the windspeed or velocity profile; the windpower profile is proportional to the cube of the wind speed profile.

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

A discontinuance of electric power supply.

A device that transfers heat by the continuous evaporation and condensation of an internal fluid.

For valves and fittings, implies that they are suitable for working pressures between 125 to 175 pounds per square inch.