Defined term
Photovoltaic performance ratio
Photovoltaic performance ratio compares delivered system energy with a reference yield based on in-plane irradiation and installed capacity over the same period.
Also known as PV performance ratio
measurement · Concept code GS-CONCEPT-041 · Last verified August 20, 2026
Definition and boundaries
Definition
Photovoltaic performance ratio compares delivered system energy with a reference yield based on in-plane irradiation and installed capacity over the same period.
Definition claim verification: Verified August 20, 2026
In plain language
When comparing Photovoltaic performance ratio, keep the unit, time period, measurement boundary, and underlying assumptions the same on both sides.
What it is not
It is not module efficiency, capacity factor, or a direct measure of financial return.
Decision context
Why it matters
The meter boundary, irradiation source, capacity basis, availability, period, and calculation convention must remain consistent when comparing values.
Decision-context claim verification: Verified August 20, 2026
Information boundary
This page provides general educational context, not a site design, production guarantee, utility determination, contract interpretation, legal opinion, tax conclusion, or individualized financial advice. Verify property, equipment, utility, jurisdiction, program, and agreement details before acting.
Concept relationships
Affects
- Annual solar productionPublished conceptPhotovoltaic performance ratio can affect how Annual solar production is evaluated
Primary sources
- National Renewable Energy Laboratory: System Advisor Model Help
Revision System Advisor Model 2023.12.17 help · Source event as of December 17, 2023 · Ontology accessed August 20, 2026 · Ontology verified August 20, 2026
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