An interior or exterior movable panel that operates on hinges or slides into place, used to protect windows or provide privacy.

A device for transforming the quality and quantity of electrical energy; also an inverter.

The angle between the sun's apparent position in the sky and true south, as measured on a horizontal plane.

The process of modifying the characteristics of electrical power (for e.g., inverting dc to AC).

The amount of power per unit area of a free windstream.

The process of distributing electricity; usually defines that portion of an electrical utility's power lines between a utility's power pole and transformer and a customer's point of connection/meter.

A window glazing coating, usually tinted bronze or gray, used to reduce building cooling loads, glare, and fabric fading.

See Solar Module.

The amount of solar radiation, both direct and diffuse, received at any location.

A connection or link between power systems that enables them to draw on each other's reserve capacity in time of need.

A federally funded institute, created by the Solar Energy Research, Development and Demonstration Act of 1974, that conducted research and development of solar energy technologies. Became the National Renewable Energy Laboratory (NREL) in 1991.

A device that achieves very high temperatures by the use of reflectors to focus and concentrate sunlight onto a small receiver.

The elements and compounds that result from the combustion of a fuel.

A solar photovoltaic device that produces a specified power output under defined test conditions, usually composed of groups of solar cells connected in series, in parallel, or in series-parallel combinations.

A device used to collect, absorb, and transfer solar energy to a working fluid.

The structure (in a residential heating appliance, industrial furnace, or power plant) into which combustion gases flow and are contained until they are emitted to the atmosphere.

(see Feeder)

The ratio of energy reflected from a surface in a given waveband to the energy incident in that waveband.

The gas resulting from the combustion of a fuel that is emitted to the flue.

An apparatus that replicates the solar spectrum, and used for testing solar energy conversion devices.