PV loss due to temperature

[how]

Hello,

May i know how to adjust 2 parameters below to obtain the higher performance ratio at the output of inverter.

1) PV loss due to irradiance level (cost 0.5% efficiency loss)

2) PV loss due to temperature (cost 9.5% efficiency loss)

In my simulation, the thermal parameter i set to "free" mounted modules with air circulation. The geographic site at Kedah, Malaysia.

[André Mermoud]

There is no really explicit parameter for these losses: these are a result of the simulation.

- The irradiance loss is related to the low-light performance of your PV modules. Which is itself dependent mainly on the Rserie defined for this module.

Please see our FAQ How should be the Rserie value specified ?

- The temperature loss is related to the heat loss factor U (normally 29 W/m2k for a "nude" module, i.e. row arrangement), and the temperature behavior of the PV module (muPmpp factor).

You should not modify these values without solid reasons.

[Cohend555]

Hi 

Could you explain how can I adjust the heat loss U factor if I have enough data from many years of temperature sensors on the ambient and panel temperature?

Thank you

Edited October 11, 2022 by Cohend555