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Greenbyte Documentation

Performance Index (Availability Corrected)

The performance index (availability corrected) is a metric of an inverter's true performance. It compares actual power to potential power for timestamps when the inverter is online, so it is calculated when the inverter is producing. The Performance Index (availability corrected) can be used to find inverters that under-perform during normal operation. This means that it is only calculated when System availability is more than 0%.

Technology

Solar

Remarks

Required metadata field:

  • Performance Irradiance Cut-In (W/m2) (Inverter metadata 13)

Equation
Performance_Index__Availability_Corrected__-_Equation.png

Where:

PIAC

is Performance Index Availability Corrected Inverter

Pcp,perf

is Cascading Potential Power - Solar

I

is Solar Irradiance Reference

Cut-inIP

is Performance Irradiance Cut-In (W/m2) (Inverter metadata 13)

ATS

is Time-Based System Availability (Inverter)

T

is the device resolution in hours

E

is the Energy or Power with Fallback

Inputs
Performance_Index__Availability_Corrected__-_Inputs.png
Usage Example
Performance_Index__Availability_Corrected__-_Usage_Example.png