Time series imports only one year

[Carlos Arredondo]

Hi all,

I have a 10 min step time-series from 06/2022 to 10/2025. I also have a couple of missing months and values in between because they are real and filtered measurements. when I "import and generate weather data" from "custom file" I created the MEF that fits the format of my CSV meteo data file. When checking the data quality only one year appears and appears with the missing months from that year, even when for the following years I had enough data to cover the hole. I also have significant outliers in time shift.

I know my data measurements are limited to be considered as representative, but why does the model discard the info after the first 365 days?

[Eric Poirrier]

Hello Carlos,

PVsyst simulations are limited to a maximum period of one year. Accordingly, the associated weather data file is also limited to one year, and any data beyond 365 days in a custom-imported file are ignored.

If your dataset covers more than one year, you will need to run separate simulations, each using its own corresponding weather data file.

Additionally, since your measurements contain missing data, I would recommend isolating the reliable and consistent measurement periods into separate files using a text editor. These cleaned files can then be reimported using the Import and Generate Custom File tool.

Best regards,
Eric