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Electric Circuit
Path followed by electrons from a power source (generator or battery) through an external line (including devices that use the electricity) and returning through another line to the source.

Electric Current
A flow of electrons; electricity, amps.

Electrical Grid
An integrated system of electricity distribution, usually covering a large area. As in "off the grid".

Energy
Usable heat or power. The amount (or average amount) of power produced, consumed, or delivered over a specified time period. Typically measured in watt-hours (Wh), kilowatt-hours (kWh), or megawatt-hours (MWh).

Ethylene Vinyl Acetate (EVA)
An encapsulant used between the glass cover and the solar cells in PV modules. It is durable, transparent, resistant to corrosion, and flame retardant.