A device used to protect the user of any electrical system or appliance from shock.

A solar photovoltaic product that generally consists of groups of PV cells electrically connected together to produce a specified power output under standard test conditions, mounted on a substrate, sealed with an encapsulant, and covered with a protectiv ...

An investment in a power plant or demand side management measures or programs, that become uneconomical due to increased competition in the electric power market. For example, an electric power plant may produce power that is more costly than what the mar ...

The production of hydrogen using a photoelectrochemical cell.

An electrical installation containing power conversion (and sometimes generation) equipment, such as transformers, compensators, and circuit breakers.

The trapping of light by refraction and reflection at critical angles inside a semiconductor device so that it cannot escape the device and must be eventually absorbed by the semiconductor.

The generation of electricity or shaft power by an energy conversion system and the concurrent use of rejected thermal energy from the conversion system as an auxiliary energy source.

Energy derived from resources that are regenerative or for all practical purposes can not be depleted. Types of renewable energy resources include moving water (hydro, tidal and wave power), thermal gradients in ocean water, biomass, geothermal energy, so ...

In reference to a wind turbine, a condition when the rotor stops turning.

A room that faces south (in the northern hemisphere), or a small structure attached to the south side of a house.

The abrupt and large increase in electrical conductivity exhibited by some metals as the temperature approaches absolute zero.

An energy system in which the fuel production equipment is in close proximity, or connected to, the fuel using equipment.

A type of home mortgage that takes into account the energy savings of a home that has cost-effective energy saving improvements that will reduce energy costs thereby allowing the homeowner to more income to the mortgage payment. A borrower can qualify for ...

The U.S. Government's 12-month financial year, from October to September, of the following calender year; e.g.: FY 1998 extends from Oct. 1, 1997 to Sept. 30, 1988.

An instrument for measuring relative humidity by means of wet and dry-bulb temperatures.

A heat exchanger that transfers heat contained in a liquid heat transfer fluid to another liquid.

The physical measure of the subjective sensation of brightness; measured in lumens.

The prevailing or average weather conditions of a geographic region.

A value that describes the ability of a material to conduct heat. The number of Btu that flow through 1 square foot of material, in one hour. It is the reciprocal of the R-Value (U-Value = 1/R-Value).

The low effective temperature of the sky on a clear night.