Defined term
Photovoltaic system availability
DOE FEMP defines PV availability as the percentage of time a system is operational and capable of delivering power when the solar resource and grid are working.
measurement · Concept code GS-CONCEPT-131 · Last verified August 28, 2026
Evidence through 2026-05-20 · 0 sources have no source-event date
Content modified 2026-08-28
Definition and decision context
Definition
DOE FEMP defines PV availability as the percentage of time a system is operational and capable of delivering power when the solar resource and grid are working.
Verified August 28, 2026
Why it matters
DOE FEMP calculates availability from time-series downtime, so it is an operational measure rather than a production forecast.
Verified August 28, 2026
Selector-derived public graph
Learning navigation
Primary topic: Performance
Broader topic
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More specific topics
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Learn first
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Builds toward
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Primary sources
- U.S. Department of Energy: DOE FEMP, Confirm PV System Performance — Availability, lines 42-46
Revision DOE FEMP page updated May 20, 2026 · Source event as of May 20, 2026 · Ontology accessed August 28, 2026 · Ontology verified August 28, 2026