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An electric current that reverses its direction at regularly recurring intervals, such as that used to provide electric service to electric utility customers.

The portion of an affected utility’s annual retail electricity sales that must come from eligible renewable energy resources.

The public utilities commission that regulates rates, operations and other aspects of most electric and gas utilities in Arizona.

Methane and other combustible gases released from the decomposition of organic materials.

A thermal solar facility that concentrates sunlight in order to collect heat and use that heat to create steam which then drives a steam turbine creating electric generation (also referred to as concentrating solar thermal).

The date which the generating resource started commercially producing power.

CSP technologies use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat. This thermal energy can then be used to produce electricity via a steam turbine or heat engine that drives a generator.

An energy resource that is non-renewable in nature, such as natural gas, coal, oil, and uranium, or electricity that is produced with energy resources that are not renewable energy resources.