Defined term

Photovoltaic shading loss

Photovoltaic shading loss is the reduction in modeled or measured photovoltaic output associated with solar radiation blocked from modules by surrounding objects or terrain.

Also known as solar shading loss

measurement · Concept code GS-CONCEPT-034 · Last verified August 20, 2026

Definition and boundaries

Definition

Photovoltaic shading loss is the reduction in modeled or measured photovoltaic output associated with solar radiation blocked from modules by surrounding objects or terrain.

Definition claim verification: Verified August 20, 2026

In plain language

When comparing Photovoltaic shading loss, keep the unit, time period, measurement boundary, and underlying assumptions the same on both sides.

What it is not

It is not every system loss and it should not be inferred from annual shade-free hours alone.

Decision context

Why it matters

The loss varies by time, geometry, electrical layout, module-level behavior, vegetation, and modeling method, so a default loss is not a site survey.

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 shading loss can affect how Annual solar production is evaluated

Primary sources

What to do next

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