Vac

Volts AC.

An inverter that can function only when tied to the utility grid, and uses the prevailing line-voltage frequency on the utility line as a control parameter to ensure that the PV system’s output is fully synchronized with the utility power.

The designation of a power supply providing continuous uninterruptible service when a main power source is lost.

Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.

A system capable of rotating independently about two axes and following the sun’s orientation and height in the sky (e.g., vertical and horizontal).

A charge at a low rate, balancing through self-discharge losses, to maintain a cell or battery in a fully charged condition.

Conductors used to transmit high-voltage electricity from the transformer to the electric distribution system.

An electromagnetic device used to convert AC electricity, either to increase or decrease the voltage.

PV array that follows the path of the sun to maximize the solar radiation incident on the PV surface. The two most common orientations are (1) one axis where the array tracks the sun east to west and (2) two-axis tracking where the array points directly at the sun at all times. Tracking arrays use […]

The measure of closeness in shape between a waveform and its fundamental component.