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HOMER Pro 3.11

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Standard Test Conditions

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PV manufacturers rate the power output of their PV modules at standard test conditions (STC), which are a radiation of 1 kW/m2, a cell temperature of 25°C, and no wind. Standard test conditions do not reflect typical operating conditions because full-sun cell temperatures tend to be much higher than 25°C.

See also

How HOMER Calculates the PV Cell Temperature