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Definitions: Just the basics, please

Array

A complete PV power-generating unit consisting of a number of individual electrically and mechanically integrated modules with structural supports, trackers, or other components.

Balance of system (BOS) components

The electrical and structural components, aside from the major components, that are required to complete a PV system.

Battery bank

A group of batteries connected together with series and parallel connections to provide a specific voltage and capacity.

Grid-tied system

A PV system that operates in parallel with and is connected to the electric utility grid.

Integrator (System Installer)

A business that designs, builds, and installs complete PV systems for particular applications by matching components from various manufacturers.

Interconnection agreement

A contract between a distributed-power producer (PV system owner) and an electric utility that establishes the terms and conditions for the interconnection.

Inverter

A device that converts DC power to AC power.

Net Metering

A metering arrangement where any excess energy exported to the utility is subtracted from the amount of energy imported from it.

Off-grid or Stand alone system

A type of PV system that operates autonomously and supplies power to electrical loads independently of the electric utility. Most often is paired with a battery bank.

Permit

Permission from the AHJ that authorizes construction work to begin and establishes the inspection requirements, but does not represent an approval for compliance with codes and standards.

Racking system

A type of fixed or adjustable-tilt array mounting system that can be on a roof, ground mounted or top of pole mounted.

Site survey

A visit to the installation site to assess the site conditions and establish the needs and requirements for the system.

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