Greenbyte Documentation

Potential Power Module Temperature

Calculates the potential power in the same way as irradiance, but includes temperature. The warmer the panel is the less effective it will be, according to the temperature coefficient constant. Degradation and irradiance cut-in are accounted for (via the potential power irradiance only signal).

The temperature used for every timestep will be an average of available temperature signals.

Technology

Solar: Inverter

Equation
potential_power_module_temp_eq.jpg

where:

Pp

is the potential power module temperature

Pi

is potential power from irradiance only

K

is the power temperature coefficient (inverter metadata)

Tavg

is the average of available temperature signals. The temperature average (Tavg), uses data from the pyranometers configured as references for this inverter (see Edit a device for more information). If no reference pyranometers are configured, data from all other pyranometers in the same site will be used.

Tref

is the cell reference temperature (site metadata)

Inputs
potential_power_module_temp_in.jpg
Example

In this example, you can see how the temperature of the module affects the potential power calculation. With higher module temperature the potential power is lower than potential power irradiance only.

potential_power_module_temp_ex.jpg