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The German Renewable Energy act that regulates feed-in-tariffs for renewable energy related technology in Germany

Electric Current

Flow of electric charge through a conductive medium

Electrical Energy

Energy that is associated with electric charges and their movements

Electrical Light

Light produced by electricity


The flow of electrons that is used to power many devices.

Electricity Generation

Process of producing electric energy or the amount of electric energy produced from energy sources. Usually measured in kilowatt hours (kWh) or megawatt hours (MWh).

Electric Motor

Device that uses electric energy and converts it into mechanical energy in order to turn a shaft.

Electric Power

Amount of energy produced per second.

Electrical power network

Substations, installations, cables or lines that are used for the distribution and transmission of electricity.


Magnetism that is produced by an electric current

Electromagnetic Energy

This is energy that travels in waves; can be looked as a combination of electric and magnetic energy

Electromagnetic Waves

Radiation made of traveling magnetic and electric waves.


Subatomic particle with a negative charge.

Electric Utility Restructuring

The electric power industry has primarily been made up of investor-owned utilities. Restructuring this industry would mean the introduction of competition as well as decreased regulatory control.

Electrostatic Precipitator

Vertical parallel metal plates utilizing mutual attraction of opposite electric charges. This is used to remove dust or ash particles or liquid droplets that are suspended within gas.

Emergency shutdown (WT)

Rapid shutdown of a WT triggered by a protection system


Discharge of a substance into the environment; generally references to release of particles or gases into the air


The capacity of doing work, either potential or kinetic.

Energy Consumption

The use of energy as a source of power.

Energy Payback Time

The amount of time a power generating facility needs to breakeven with the energy-input of the manufacturing process.

Energy Transition

Transition to a sustainable economy by sustainable development, energy efficiency and renewable energy.

Environmental conditions

Characteristics of the environment such as humidity, altitude, temperature, etc that affects WT behavior

Ethyl Tertiary Butyl Ether (ETBE)

This is the chemical name for ((CH3)3COC2H5). It is a colorless and flammable oxygenated hydrocarbon. It is created by the catalytic etherification of isobutylene with ethanol

Evaluation for conformity

This is the systematic evaluation to ensure a process or product meets specific requirements

Evacuated Tube

Within a solar thermal collector, it is an absorber tube. This is contained within a evacuated glass cylinder.

Exempt Wholesale Generator (EWG)

Non-Utility electricity generator that does not qualify as a facility under the Public Utility Regulatory Policies Act of 1978

External conditions (WT)

Factors that affect the operation of a WT, including climatic factors, electrical network connections and wind regimes.

Extreme wind speed

This is the highest wind speed, averaged over t seconds.


Costs or benefits generated as a byproduct of an economic activity.