Free Online Temperature Corrected PR Calculator

Follow these steps to calculate the Temperature Corrected Performance Ratio (PR) of your solar plant:

  1. Enter Energy (kWh): Input the total energy output measured over the selected time period.
  2. Enter Plant Capacity (kW): Provide the rated DC capacity of your solar plant.
  3. Enter Avg. Module Temperature (°C): This is the average module surface temperature recorded over the selected time period.
  4. Enter Actual Insolation (kWh/m²): Use your actual insolation data measured over the selected time period.
  5. Enter Irradiance @ STC (kWh/m²): This is typically 1 kW/m² and this calculator takes it by default.
  6. Enter Avg. Cell Temperature at STC (°C): Usually 25°C and this calculator takes it by default.
  7. Enter Module Temperature Coefficient of Power (%/°C): This is usually a negative value, typically in the range of -1.25 to -0.10 %/°C. Please refer to the solar panel datasheet to find this value.
  8. Click Submit: The Temperature corrected PR will appear in the result field.

The goal of the temperature correction is to "give credit" for the power lost due to high temperatures. The temperature corrected P.R. value represents what the system's performance ratio would have been if it had been operating at the ideal 25°C temperature.