Defined term

Nominal operating cell temperature (NOCT)

Nominal operating cell temperature (NOCT) is a PV module’s measured cell temperature under the defined NOCT test conditions of 800 W/m² incident irradiance, 20°C ambient temperature, and 1 m/s wind speed.

measurement · Concept code GS-CONCEPT-135 · Last verified August 28, 2026

Evidence through 2025-04-16 · 0 sources have no source-event date

Content modified 2026-08-28

Definition and decision context

Definition

Nominal operating cell temperature (NOCT) is a PV module’s measured cell temperature under the defined NOCT test conditions of 800 W/m² incident irradiance, 20°C ambient temperature, and 1 m/s wind speed.

Verified August 28, 2026

Why it matters

In NREL SAM’s detailed-PV model, NOCT is a module parameter for the cell-temperature model; it is not the temperature a module will necessarily reach at a particular home.

Verified August 28, 2026

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