A PC software package for the study, sizing and data analysis of complete PV systems.
PVsyst is a PC software package for the study, sizing and data analysis of complete PV systems.
It deals with grid-connected, stand-alone, pumping and DC-grid (public transportation) PV systems, and includes extensive weather data and PV systems components databases, as well as general solar energy tools.
This software is geared to the needs of architects, engineers, researchers. It is also very helpful for educational training.
PVsyst focuses on complete and precise PV system study with a complete set of tools.
Performances: running the simulation for systems with many subarrays is now much faster
Spectral correction: the FirstSolar model can now be use with custom coefficients
Spectral correction: the FirstSolar correction factor is now visualized in a graph in the dialog as well as in the report
System unavailability: definitions are now more flexible and can be defined from a CSV file containing a time series
System unavailability: nightly auxiliary losses are not applied anymore when the system is unavailable
Weather data, custom file: the diffuse model coefficients have been refitted and updated to match the recent change of solar constant. Performance of the model is documented in EUPVSEC 2026 publication
Weather data, Meteonorm: update to V9.0.10
Weather data, synthetic data generation: 15- and 5-min timestep files can now be generated.
Corrections
3D scene: importing a GeoTIFF file located in a directory with special characters no longer leads to an error
3D scene: importing a GeoTIFF file is now faster and provides feedback to the user on files that are too big
3D scene: imported image and topography now match precisely the area of the map you see on the import screen
3D scene: updated to the latest version of the elevation API
3D scene: fixed a limit case where the average azimuth of an orientation was incorrectly calculated as 0
3D scene: fixed small issues related to the PVC2 import
3D scene: simulations are now blocked when an object is too far from the scene origin, with a message indicating the maximum allowed distance and how to correct the scene
Bifacial: backside mismatch loss is no longer zero in case of mixed orientations. This bug impacted only very specific cases
Bifacial: tracking with wind stow and irradiance optimization are now properly accounted for in the backside irradiance model
Simulation: fixed an error in the clipping correction model for sub-hourly weather time series resampled from a 1-minute time series, such as the ones from the Meteonorm import at site creation. This bug impacted the simulation results, especially inverter losses
Storage, weak grid: fixed issue where battery discharge could be prevented after the grid is disconnected
Trackers: field details in the system summary window are now correct
Weather data: fixed major issue for import of GHI-only or POAI hourly time series. The sun position in the GHI-to-DHI model has been corrected and does no longer causes a shift of DHI values towards the afternoon
Weather data: corrected default Linke coefficients used for GlobHorCS and DiffHorCS when no information is present in SIT and MET files
Weather data, custom file: wind velocity unit no longer resets to m/s when reading a MEF file
Weather data, custom file: removed the legacy import from the assistant.
