Step 8 Measured STC Temperature Performance Ratio

Concept

PR' STC measured Measured STC Temperature Performance Ratio (decimal)

Yf measured Measured final system yield from measurement (kWh/kW) or (kWh/kWp), also can said the unit is hour

Ck Power de-rate factor due to temperature (decimal)

Gi,k Solar irradiance in weather data table (W/m²)  

Gi, ref Reference Solar irradiance, assume 1000 Wm-2 if not given (W/m²) 

T2, T1 Logging time 

𝜏k Recording interval

From Step 6 Final System Yield >> 6.3 Measured Final System Yield, Yf measured = 1333.3 kWh/kW per annum = 1333.3 h