Electric current in which the direction of flow is reversed at frequent intervals--usually 100 or 120 times per second. AC is the "standard" form of energy that is delivered to homes and businesses.

A unit of measure that indicates how much electrical current is flowing through your wires.

Renewable energy sources, such as wind, flowing water, solar energy and biomass, which create less environmental damage and pollution than fossil fuels.

An interconnected system of PV modules that function as a single electricity producing unit.

PV technologies that have been integrated into the design of the building or structure; typically replacing conventional building materials.

Individual unit of a photovoltaic panel or module.

Electric current in which electrons flow in one direction only, such as current from solar panels. Must be converted to AC current in order to be used by typical household appliances.

The flow of electrons through a circuit.

The integrated infrastructure of power lines, transformers and substations that deliver electricity to homes and businesses.

An electrical distribution box that holds electrical circuits. Often referred to as a "breaker box".