meteofile Error Importing 10-Year File via "PVsyst Standard Format"

[CanberkTunay]

Hello PVsyst Community,

I am trying to import 10 years (e.g., 2014-2023) of hourly weather data (originally from Open-Meteo) into PVsyst as a single file, specifically using the Databases -> Import weather data -> PVsyst standard format tool. My goal is to have the full 10-year dataset available for PVsys's internal TMY generation.

 

I am using PVsyst version 8.0

 

Following the detailed documentation (Help -> Importing weather data -> PVsyst standard format), I generated a single multi-year CSV file adhering strictly to the specification:

 

1. First Line: The file starts exactly with #Weather data hourly data.
2. Metadata Headers: Includes all mandatory #Tag;Value headers using semicolon separators.
3. Data Headers: Includes the two required data header lines (first: Year;Month;Day;Hour;Minute;GHI;DHI;Tamb;WindVel;RelHum, second: ;;;;;W/m2;W/m2;deg.C;m/s;%).
4. Data Format: Data rows use semicolon separators and dot (.) decimal characters.
5. Encoding: Saved as UTF-8 without BOM.

 

File Verification:

The generated CSV file looks correctly formatted when viewed in Notepad, matching the requirements described in the Help file (See Image 1 - showing headers and first data rows).

When I attempt to import this carefully formatted 10-year file using Databases -> Import weather data -> PVsyst standard format, I immediately receive the error:

 

"This file is not a PVsyst Standard meteo file (missing tag on first line)." (See Image 2).

This error occurs despite the first line being exactly what the documentation specifies and appearing correctly in the file itself.

Has anyone successfully imported a multi-year hourly data file using the "PVsyst standard format" importer in PVsyst V8.0? Is there a known issue with this importer failing to recognize the #Weather data hourly data tag?

Any insights on how to successfully import a multi-year file using the "PVsyst standard format" tool in V8.0 would be greatly appreciated.

 

Thank you.

 

İmage 1

İmage 2

[Linda Thoren]

Hello!

You should divide your 10 years of data into 10 different files, one for each year. Then you can generate a TMY weather filed based on these 10 individual year in the TMY generation tool.  

In your workspace, you find a template for the PVsyst standard file, double check comparing to this file that you are following the requirements. You can also import your file as a Custom file is you continue having issues with the known format.