Annual Variability

[Ana Sofía Lanza]

Hello,
I have a question about annual variability. I have read the information available in the PVsyst help section and have seen that you have a table with the percentage variability according to different locations, their climate, latitude, and global solar radiation index (GHI). I mainly work with simulations for countries such as Honduras, Colombia, and Mexico, among others in this region. Where can I find the variability for these countries?

Best regards!

 

[Auriane Canesse]

We also have a comparison of different data sources available here, although we cannot possibly cover all countries:
https://www.pvsyst.com/help/meteo-database/import-meteo-data/data-source-comparison.html#comparison-between-several-data-sources-for-different-continents

If you need a more precise estimate for the locatiosn of your choice, I advise to get dat from different providers and compare the weather files using our comparison tool
https://www.pvsyst.com/help/meteo-database/compare-meteo-data/index.html

[Ana Sofía Lanza]

Hi,

I tried with the second link to stimate a location but I coul not get an output. What should I do?

[Auriane Canesse]

This tool is meant to compare .MET files, you first need to create several .MET files using different data sources

[dtarin]

You can download time-series data (20+ years) from https://nsrdb.nrel.gov/data-viewer. From there you can calculate it manually from GHI or import each year into PVsyst. You can also get ~18 years of data at PVGIS free https://re.jrc.ec.europa.eu/pvg_tools/en/#MR.