The relative extent that energy is required for a process.

A toilet that uses less water than a standard one during flushing, for the purpose of conserving water resources.

A group of solar photovoltaic modules connected together.

A utility owned by stockholders or other investors; sometimes referred to as a private utility, in contrast to a public utility that is owned by a government agency or cooperative.

A passage for surplus water to flow over or around a dam.

The number of cycles through which an alternating current passes per second; in the U.S. the standard for electricity generation is 60 cycles per second (60 Hertz).

A type of inverter that produces square wave output.; consists of a DC source, four switches, and the load. The switches are power semiconductors that can carry a large current and withstand a high voltage rating. The switches are turned on and off at a c ...

Infrared or radiant heat.

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

A system of astronomical time in which the sun crosses the true north-south meridian at 12 noon, and which differs from local time according to longitude, time zone, and equation of time.

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

A concrete pad that sits on gravel or crushed rock, well-compacted soil either level with the ground or above the ground.

Solar Two is a retrofit of the Solar One project (see above). It is demonstrating the technical feasibility and power potential of a solar power tower using advanced molten-salt technology to store energy. Solar Two retains several of the main components ...

An unregulated subsidiary of an electric utility that is allowed to generate and sell wholesale power as an independent energy producer, and is exempt from the Public Utility Holding Company Act of 1935.

A chemical used as a preservative and in bonding agents. It is found in household products such as plywood, furniture, carpets, and some types of foam insulation. It is also a by-product of combustion and is a strong-smelling, colorless gas that is an eye ...

A method of depositing thin semiconductor photovoltaic) films. With this method, physical processes, such as thermal evaporation or bombardment of ions, are used to deposit elemental semiconductor material on a substrate.

A load management objective that moves loads from on-peak periods to off-peak periods.

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.

The highest wind speed at which a wind turbine stops producing power.

Waste water from a household source other than a toilet. This water can be used for landscape irrigation depending upon the source of the greywater.