Renewable Energy Glossary

24/7 Carbon-Free Energy is the practice of matching each hour of a consumer's electricity use with carbon-free generation in the same timeframe and on the same grid.

An accredited investor is an individual or entity that meets specific income or net worth thresholds set by securities regulators, allowing them to participate in private capital markets.

Advanced Metering Infrastructure (AMI) is a network of smart meters and communications that enables two-way data exchange between customers and utilities.

Agrivoltaics is the dual use of land for both solar electricity generation and agriculture, positioning PV arrays to allow crop cultivation or grazing beneath them.

Albedo is surface reflectivity; higher albedo (e.g., snow, light gravel) increases bifacial PV rear-side gains and site energy yield.

Alternative assets are investments outside traditional public equities, bonds, and cash—covering real estate, private equity, infrastructure, and commodities.

Ancillary services support grid reliability—frequency regulation, spinning reserves, voltage support—and can be provided by renewables and storage.

Anti-islanding is a grid-protection function in inverters that rapidly disconnects distributed generation when the utility grid is de-energized.

Apprenticeship and prevailing wage rules under the IRA require qualifying labor standards on construction and alteration to earn full-value tax credits.

An availability guarantee is a contractual commitment that equipment or a plant will be available a specified percentage of time, often tied to liquidated damages.

Azimuth is the compass orientation of an array; for the northern hemisphere, 180° (south) generally maximizes PV production at fixed tilt.

Balance of Plant (BoP) refers to all auxiliary systems and infrastructure required for a power plant to operate aside from the core generation equipment (e.g., inverters, cabling, substations).