Import Site Data

[Tanatip]

If I only have GHI and GTI data from site measurements, is it possible to import them into PVsyst and perform a simulation? If so, what about other parameters such as ambient temperature (Tamb) that are required for the simulation?

[Auriane Canesse]

Yes you can import either GHI or POA irradiance measurements into PVsyst via the custom import.
https://www.pvsyst.com/help/meteo-database/import-meteo-data/custom-meteo-files/formats/general-format.html

We advise the minimal data to be irradiance and ambiant temperature. If you do not have temperature measurements, Tamb will be generated synthetically.

 

[Tanatip]

On 7/16/2025 at 3:16 PM, Auriane Canesse said:

Yes you can import either GHI or POA irradiance measurements into PVsyst via the custom import.
https://www.pvsyst.com/help/meteo-database/import-meteo-data/custom-meteo-files/formats/general-format.html

We advise the minimal data to be irradiance and ambiant temperature. If you do not have temperature measurements, Tamb will be generated synthetically.

 

Thank you for your explanation.

May I ask how the Tamb is generated?

[Auriane Canesse]

The temperature is generated from the monthly values saved in your site file, using the Meteonorm algorithm

https://www.pvsyst.com/help/physical-models-used/synthetic-data-generation/index.html