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Greenbyte Documentation

Grid Meter/Production Meter Performance Ratio IEC

The Performance Ratio for Production meters and Grid meters is an aggregated metric of the solar PV system. It compares the meter’s actual energy to the sum of all inverters’ (connected to that meter) potential energy. The Performance Ratio IEC can be used to find sites/inverters that underperform during normal operation.

Technology

Solar

Remarks

Required metadata fields:

  • DC Capacity Inverter

Equation
Grid_Meter-Production_Meter_Performance_Ratio_IEC_-_Equation.png

Where:

PR

is the IEC Grid Meter Performance Ratio/ Production Meter Performance Ratio

Egrid

is the Energy Export Meter, used for a Grid meter

EGMS

is the Energy Export GMS Meter, used for a Production meter

I

is the average Solar Irradiation of all operational pyranometers on site

ISTC

is the IEC Irradiance standard test condition (1000 W/m2)

CDC

is the inverter DC capacity (Metadata field XXX)

Inputs

Grid Meter Performance Ratio IEC

Grid_Meter-Production_Meter_Performance_Ratio_IEC_-_Grid_Meter_Performance_Ratio_-_Input.png

Production Meter Performance Ratio IEC

Grid_Meter-Production_Meter_Performance_Ratio_IEC_-_Production_Meter_Performance_Ratio_-_Input.png

Note

Site Average Solar Irradiation (7803) is the Average of all pyranometers on site. It considers the average of Solar Irradiation to calculate this.

Usage Example

This section will be updated later.