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Greenbyte Documentation

Performance Ratio (IEC)

Performance Ratio according to IEC-61724-1.

Technology

Solar

Remarks

This calculation requires Solar Irradiance Reference and Energy to be calculated.

Required metadata field:

  • DC Capacity (kWp) (Inverter metadata 7)

Optional metadata field:

  • Performance Irradiance Cut-In (W/m2) (Inverter metadata 13) - if missing, a default of 20W/m2 will be used.

Note

This signal is resolution dependent.

Equation
Performance_Ratio__IEC__-_Equation.png

Where:

PR

is the Performance Ratio (IEC)

Epotential

is the potential energy production

Eactual

is the actual energy production

I

is the Solar Irradiance Reference for each time step

cut-inIP

is the Performance Irradiance Cut-In (W/m2) (Inverter metadata 13), with a fallback to 20 W/m2

ISTC

is irradiance used under Standard Test Conditions (1000 W/m2)

CDC

is the DC Capacity (kWp) (Inverter metadata 7)

E

is the Energy with fallback

T

is the device resolution in hours

Inputs
Performance_Ratio__IEC__-_Inputs.png
Usage Example

This section will be updated later.