Defined term
Photovoltaic production estimate
A photovoltaic production estimate is modeled electrical energy output for a specified photovoltaic system, location, weather dataset, period, and set of assumptions.
Also known as solar production forecast
measurement · Concept code GS-CONCEPT-066 · Last verified August 20, 2026
Evidence through 2025-09-25 · 1 source has no source-event date
Content modified 2026-08-20
Definition and boundaries
Definition
A photovoltaic production estimate is modeled electrical energy output for a specified photovoltaic system, location, weather dataset, period, and set of assumptions.
Definition claim verification: Verified August 20, 2026
In plain language
When comparing Photovoltaic production estimate, keep the unit, time period, measurement boundary, and underlying assumptions the same on both sides.
What it is not
It is not a production guarantee or a measurement of what an unbuilt system has generated.
Decision context
Why it matters
Preserve the model version, weather data, capacity basis, array geometry, module and inverter assumptions, losses, availability, and time interval with the result.
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.
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Learning navigation
Primary topic: Performance
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Primary sources
- National Renewable Energy Laboratory: PVWatts Calculator
Source event date not provided · Ontology accessed August 7, 2026 · Ontology verified August 7, 2026
- National Laboratory of the Rockies: PVWatts Version 8 API
Revision PVWatts API 8.0 · website 8.5.2 · Source event as of September 25, 2025 · Ontology accessed August 20, 2026 · Ontology verified August 20, 2026