Amorphous silicon with a small amount of incorporated hydrogen. The hydrogen neutralizes dangling bonds in the amorphous silicon, allowing charge carriers to flow more freely.

Power plants, whose output depends on a factor(s) that cannot be controlled by the power generator because they utilize intermittent resources such as solar energy or the wind.

An automatic valve that is opened or closed by an electromagnet.

A nationally recognized energy rating program that gives builders, mortgage lenders, secondary lending markets, homeowners, sellers, and buyers a precise evaluation of energy losing deficiency's in homes. Builders can use this system to gauge the energy q ...

The number of revolutions that the motor turns in a given time period (i.e. revolutions per minute, rpm).

A law that requires electric utilities to purchase electricity produced from qualifying power producers that use renewable energy resources or are cogenerators. Utilities are required to purchase power at a rate equal to the avoided cost of generating the ...

A type of lamp that produces light from sodium gas contained in a bulb operating at a partial pressure of 0.13 to 1.3 Pascal. The yellow light and large size make them applicable to lighting streets and parking lots.

Nonglossy paint with a relatively high absorptance.

That part of an electricity bill that is based on the amount of electrical energy consumed or supplied.

The planting, cultivation, and harvesting of a single species of crop in a specified area.

Legal documents that regulate construction to protect the health, safety, and welfare of people. Codes establish minimum standards but do not guarantee efficiency or quality.

Materials with high thermal energy storage capacity contained in or part of a building's walls, floors, or freestanding elements.

The analysis of atmospheric conditions, particularly moisture in the air.

A term used to describe a technologically advanced window system that contains glazing that can change or switch its optical qualities when a low voltage electrical signal is applied to it, or in response to changes in heat or light.

A building element that provides protection against the sun, wind, and precipitation.

A chemical element that can be used as a fuel since it has a very high energy content.

A means of billing electric power consumers to pay for the costs of demand side management/energy conservation measures and programs. (See also Benefits Charge.)

Recombination occurring in the emitter region of a photovoltaic cell.

Ethyl alcohol (C2H5OH)

A commmon term refering to an electricity transmission and distribution system.