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Greenbyte Documentation

Potential Power Ambient Temperature

Calculates potential power based on the cascading ambient temperature signal.

Technology

Solar

Remarks

The Cascading Temperature Inverter is required for the Potential power to have a value.

Required metadata fields:

  • DC Capacity (kWp) (Inverter metadata 7)

  • Nominal Operating Cell Temperature (Inverter metadata 26)

  • Power Temperature Coefficient (%/°C) (Site metadata 27)

Optional metadata fields:

  • Degradation factor (Site metadata 10) - degradation is skipped if missing

  • Commissioning Date (Inverter metadata 23) - degradation is skipped if missing

  • Irradiance cut-in for Availability (Inverter metadata 8)

Equation
Potential_Power_Ambient_Temperature_-_Equation.png

Where:

Pp

is the Potential Power Ambient Temperature

Ic

is the Solar irradiance with applied Cut-in

CDC

is the Capacity of the device (Inverter metadata 7)

K

is the Power temperature coefficient (Site metadata 27)

Tcorr

is the Corrected Ambient temperature

T0

is the nominal operating cell temperature at ideal conditions (Inverter metadata 26)

Tcasc

is the Cascading Temperature Inverter

Tnoct

is the Nocturnal air temperature constant (20°C)

Inoct

is the Nocturnal irradiance constant (800W/m2)

I

is Solar Irradiance Reference

Cut-inIA

is the Irradiance Cut-In for Availability (Inverter metadata 8)

degrade

is the function applying the Degradation factor (Site metadata 10) and Commissioning Date (Inverter metadata 23)

Inputs
Potential_Power_Ambient_Temperature_-_Inputs.png
Usage Example

In this example, the Potential Power Ambient Temperature is compared with the Potential Power Irradiance Only. As you can see, the Potential Power Ambient Temperature is slightly higher during the colder part of the day and slightly lower during the warmer part of the day.

Potential_Power_Ambient_Temperature_-_Usage_Example.png