PVsyst: baixar versions anteriors

* Improvements

- 3D scene: added more warnings to the PVC2 import
- Performance: running the simulation for systems with many subarrays is now much faster
- Simulation: predefined sub-hourly time steps can now be selected in the advanced simulation dialog, allowing users to run simulations at different time steps for improved efficiency.

* Corrections

- 3D scene: PVC2 import now recognises the new "rotate_with_tracker" gap element
- Interactive map: using OpenStreetMap when creating a new site is working again
- Simulation: the subhourly simulation doesn't crash anymore on large projects with many subarrays
- Unavailability: issues related to the unavailability definition no longer cause crashes.

* Improvements

- 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.

** New features

- 3D scene: .pvc2 and .pvz2 file formats are now supported for 3D data import
- Optimizers: it is now possible to set up more than 2 strings per MPPTs in compatible Huawei's inverter + optimizer combinations.

** Improvements

- Bifacial: improved the choice of ground points for the bifacial 2D view factor model. Ground irradiances and reflected view factors may change slightly, especially at large pitches
- Economic evaluation: operating costs can now be scheduled by year, year range, or specific years
- Output file: GHI clear sky and DHI clear sky are now available as variables to be exported
- System: minimum temperature from the MET file is now displayed, with a warning when it is lower than the lower temperature for absolute voltage limit defined in the project settings
- Weather data: new option to generate 5-minute and 15-minute synthetic weather files with Meteonorm. These files can be used for clipping correction but are not retrocompatible with prior PVsyst versions (*)
- Weather data, Meteonorm: update to V9.0.10
- Weather data, NSRDB: added MSG and Polar resources for API imports in Europe, Africa and regions north of 60°N
- Weather data, custom file: multi-year CSV imports now create one MET file per calendar year.

** Corrections

- 3D scene: improved tracker orientation grouping when importing a shading scene
- Bifacial: loss diagram is now correctly displayed when the bifaciality factor is set to zero
- Economic evaluation: improved condition to display prefix for big amounts
- Loss diagram: improved display of energy from grid and missing energy, with better handling of text overlaps and crossing lines
- Ohmic losses: fixed issue resetting losses to zero after simulation in certain situations
- Report: charge and discharge strategy plot content and scale have been corrected
- Results: fixed issue with grid limitation values in hourly graphs
- Simulation: unbalanced MPPT configurations with multi-orientations daily sharing now account for inverter maximum power function of cos(phi) and temperature
- Weather data import: the assistant no longer allows saving a file with critical errors
- Weather data, NSRDB: NREL references have been renamed to NLR in import windows.

(*) More detailed information are available in PVsyst Forum (topic "Announcements - main changes - PVsyst 8.1.5").

** New features

- Weather data, known format import: integration of ANE-NEDO web API weather data for Japan.

** Improvements

- P50-P90 estimation: the default annual GHI variability model was updated to a linear model based on a larger measurement dataset.

** Corrections

- 3D scene: orientation averaging during 3D import now uses a geometrically correct method that properly handles fields with varying tilt, azimuth, and terrain slope
- Batch mode: the batch simulations now work also for sub-hourly simulation steps (already fixed in version 8.1.1)
- Power Factor: fixed issue with reactive and apparent energy values when grid limitation losses are accounted for separately and EGrdLim is not saved
- Power Factor: fixed issue with apparent energy accumulation for monthly power factors, it is now correctly recognized as the norm of the vector (E_Grid, E_ReGrid)
- Results: fixed issue with generating user-defined plots
- Results: after viewing the tables with hourly averages, there is no more error in the irradiance balance check
- System: increase/decrease arrows for the number of inverters and MPPT inputs now correctly update the values
- System: fixed an issue where the inverter nominal power distribution to individual MPPT was not always correct with shared inverters
- Weather data, custom file: importing custom weather data now computes global irradiance when missing from the source data.

** Corrections

- Grid Storage : Fixed an issue affecting self-consumption leading to energy balance errors
- P50 - P90 estimation: the default annual variability value is now correctly set when no year-to-year variability is specified by the weather provider
- Project: loading variants now takes less time
- Results: fixed issue with empty, NaN or Inf values in sub-hourly exported variables and plots
- Thermal model: fixed issue with incoherent PV module temperature values for modules with very large mass
- Weather data, known format import: fixed an issue where the site name was not correctly parsed from Solargis monthly imports.

** Improvements

- Bifacial: ground albedo can now be defined from a CSV file containing a time series
- Project: improved message handling in the main project form to display project settings and variant messages
- Storage: updated battery model, allowing for a more consistent energy balance tracking (*).

** Corrections

- 3D scene: object selection is now correctly synchronized between the object tree and group editor
- Economic evaluation: action icons in the "Investment and Costs" tab are visible again
- Horizon: fixed incorrect azimuth handling in Meteonorm horizon import
- Import Time Series: loading certain types of time series no longer causes crashes
- Optimizers: fixed issue that could attribute the full inverter power to each string when the inverter was modified and saved after the system was designed
- Optimizers, SolarEdge: systems with two sub-arrays, one with SolarEdge optimizers and one without, no longer cause crashes
- Report: added an alternative rendering mode in settings to work around a crash caused by AMD Adrenalin GPU drivers on large scenes when printing the 3D scene
- Standalone simulation: fixed issue triggering the backup generator when the battery SOC was high
- Storage, power shifting: charging power is now correctly taken into account when the units are displayed in MW
- Weather data, custom file: added validation for variable column assignments to prevent potential crashes.

(*) More detailed information are available in PVsyst Forum (topic "Announcements - main changes - PVsyst 8.1.2").

** Corrections

- 3D scene: importing 3DS files no longer causes crashes
- Batch mode: when opening the batch result file with an external program like Excel while the batch run is still executing, will not lead anymore to a crash
- Bifacial: fixed a bug with mixed-orientation where GlobGnd did not appear correctly in the loss diagram
- Bifacial: in the results, the average bifaciality factor now includes monofacial orientations. This will effectively reduce the average bifaciality factor in systems with both bifacial and monofacial modules, and may impact the normalization of backside irradiance results. End results are however not affected
- Grid connection: removed obsolete warning message
- Report: removed unecessary error message "The Cutoff Time is <= than the time step duration", related to transient thermal model.

*** PVsyst version 8.1 contains new major features

- New assistant to import Weather Data
- Sub-hourly Simulation for Grid-Connected and Standalone systems (*)
- Weather data, Meteonorm: updated to Meteonorm DLL V9, replacing V8.2.

** Other new features

- Grid limitation: power threshold can now be defined from a CSV file containing a time series
- Horizon: Meteonorm horizon import now uses the new V9 local DLL, removing the need for an internet connection
- Thermal model: PV module temperature is now computed using a transient thermal model for both hourly and sub-hourly simulations (*)
- Transposition model: sub-hourly horizontal diffuse irradiance data with the Perez model now uses coefficients adapted to each time step. These adapted coefficients aim at reducing the discrepancies between sub-hourly and hourly simulations (*)
- Weather data, custom file: new model to estimate diffuse horizontal irradiance from global horizontal irradiance. Dedicated coefficients for sub-hourly simulation are used in order to reduce the discrepancies with hourly simulations (*).

** Improvements

- Optimizers, Huawei: new optimizers in the database
- Soiling: soiling fraction can now be defined from a CSV file containing a time series
- Standalone simulation: various battery management improvements
- Storage, power shifting: charge and discharge values can now be defined from a CSV file containing a time series
- Weather data, custom file: new weather data validation step added
- Weather data, NASA: updated to NASA POWER API, replacing NASA-SSE.

** Corrections

- 3D scene: ground image is now stored in the user images folder to avoid issues when importing projects
- Bifacial: bifacial geometry is now properly defined even when pitch is irregular, instead of using default parameters for certain pitch RMSD values. Backside irradiance results may change for corresponding cases
- Clear sky model: the value of the solar constant has been updated from 1367 W/m² to 1361 W/m² to reflect more recent measurements. This has a slight effect on all sizing steps based on the clear sky model
- Grid limitation: fixed allocation of power limitation among MPPTs in case of mixed orientation sub-arrays
- Grid limitation: minor correction to the application of grid limitation at inverter level with AC losses
- Optimizers: current clipping at optimizer level is now better handled
- Thermal model: PV module temperature was saved as 0 at night conditions (GlobInc < 10W/m2), but is now properly stored
- Weather data: Linke turbidity and relative humidity are now included in the clipboard paste and import operations in the monthly weather data table
- Weather data, custom file: accuracy of Hay reverse transposition has been improved
- Weather data, known format import: fixed issue for date interpretation for PVGIS data at certain sites and retrieving site names from coordinates no longer causes crashes
- Weather data, known format import: importing single file data from NREL / NSRDB no longer causes crashes
- Weather data, Solargis: fixed issue that prevented importing certain files with non-integer time zones
- Weather data, Solargis: updated API key validity check.

(*) More detailed information available in PVsyst Forum (topic "Announcements - main changes - PVsyst 8.1.0").

* Improvements

- Databases update
- Optimizers, Huawei: updated max power for MERC1100 and MERC1300 optimizers
- Shadings: diffuse shading factor tables are stored to avoid recalculation.

* Corrections

- Backtracking: custom reference for backtracking parameters now marks the main tracker in green and the secondary tracker in orange
- Bifacial: corrected the weighted averages of intermediate results for backside irradiances. This impacts cases where multiple sub-arrays or orientations have bifacial models.

* Improvements

- Databases update
- Tutorial: new PDF tutorials were added: Step by step, "Standalone" and "Pumping".

* Corrections

- Module layout: fixed issue impacting intermediate results in cases where the PV array yields no power due to a combination of shadings and inverter operating constraints
- Storage, power shifting: fixed issue triggering warning for energy balance error in versions 8.0.18 and 8.0.19
- Weather data: tables and graphs of variable "Global tilted plane" now properly account for the chosen albedo factor.

* Improvements

- Databases update.

* Corrections

- 3D scene: import now groups table orientations based on project-defined tolerances and existing orientations
- 3D scene: importing a DAE file with conversion error no longer causes crashes
- 3D scene: the calculation of shading factor tables now completes correctly in cases where it was previously blocked
- 3D scene: objects are stored with more precision in the variant file to avoid discrepancies when loading projects
- Presizing tool: the irradiance calculation on the tilted plane is now correct.
- Report: added option to disable display of the country name in the reports
- Storage : improvements and corrections of the "power shifting" dialog

* Improvements

- Databases update

* Corrections

- Optimizers: It is now impossible to define a subarray with Huawei optimizers and a mixed orientation
- Power shifting : the grid injection power is correct when charging and discharging the battery
- Weather data : Fixed the issue preventing the import of API weather data

* New features

- Grid storage: new strategy of power shifting, from the diurnal PV production to a period offering a better tariff (*).

* Improvements

- Databases update
- Optimizer, AdvanSol: database update

* Corrections

- 3D scene: Improved stability for edge-case datasets for ground data import
- Horizon: Fix for PVGIS import missing negative azimuth
- License : unavailable license server no longer causes crashes
- Preferences: unavailable preferences file no longer causes crashes
- Project: Fix of sorting issue in the variant manager dialog
- Report: printing the carbon balance no longer causes crashes
- Report: texts in the legend of the single line diagram are not overlapping anymore
- Simulation: fixed condition where variables unrelated to system type briefly appeared

> Check also dedicated page for PVsystCLI changes.

(*) More detailed information available on PVsyst FAQ (topic "PVsyst 8.0.17: main changes").

* Improvements

- Bifacial: corrected tab order in albedo settings
- Databases update
- Optimizers, database: new AndSolar optimizers
- System: mixed orientation selection is now impossible if there is only one string defined in the subarray
- Weather data: updated NSRDB Physical Solar Model used to download data North America from v3 to v4.

* Corrections

- Batch mode: changing variant and AC wiring loss at the same time in the batch run no longer leads to an infinite loop
- Interactive map: searching for "latitude, longitude" in the interactive map is now working properly
- Module layout: displaying I/V curves after aborting shading calculation no longer causes crashes
- Optimizers: fixed issue with optimizer duty cycle applied twice during inverter power clipping
- Power sharing: the situation where a single sub-array remains in a power sharing configuration is now handled properly
- Report: "electrical shadings effect" is no longer printed when backtracking is activated with unlimited trackers, horizontal axis
- Trackers, irradiance optimization: the range of search and estimate for the diffuse shadings in the irradiance optimization algorithm has been corrected
- Weather data, Solargis: improved validation of country name when importing CSV files.

> Check also dedicated page for PVsystCLI changes.

* New Features

- Optimizers, SolarEdge: it is now possible to define subarrays with heterogeneous strings (**).

* Improvements

- 3D scene: two redundant error messages concerning the azimuth and tilt spread in averaged orientations have been removed
- 3D scene: import of scene now creates one single averaged orientation by default. An option allows re-enabling automatic detection of multiple orientations
- Ageing tool: enabled tool tips to provide information on CSV output generation
- Optimizers: Optimizer efficiency is now applied after module related losses (**)
- Optimizers: power clipping is now better handled (**)
- Weather data, Solargis: updated URL links in the TMY API integration UI to new Knowledge Base.

* Corrections

- 3D scene: small width changes in PV table dimensions (<3cm) now modify the total sensitive width/height (**)
- 3D scene: changing scene view for the report no longer invalidates shadings table
- 3D scene: improvement of the nomenclature for the dimensions of chimneys on sloping roofs
- 3D scene: copying/pasting a PV object into the "List and management of objects" window no longer causes distortion of certain objects
- 3D scene: PV module spacing and orientation from imported DAE files are now correctly saved within the variant
- 3D scene: partition check box now works correctly for Polygonial field
- Batch mode: shading table is now recomputed if backtracking parameters are changed in the batch simulation properties
- Grid storage: revision of battery operation calculations (**)
- System: number of modules in series now remains unchanged in systems combining subarrays with and without optimizers
- Tools: voltage optimization plot now prints correctly
- Trackers, diffuse shadings: "central tracker" and "custom tracker" modes now offer the choice of including shading objects in the calculation (**)
- Weather data: the NSREL option is disabled when the data is not available for the selected site.

> Check also dedicated page for PVsystCLI changes

(**) More detailed information available on PVsyst FAQ (topic "PVsyst 8.0.15: main changes").

* Improvements

- 3D scene: GCR definition clarified in the help
- Bifacial: all orientations with an error or warning are now reported
- Bifacial: errors stemming from the irregularity of pitch or the average tracker axis are now warnings
- Databases update.
- Power Factor: The help pages and other explantations about the power factor have been rewritten and have been illustrated with graphics to clarify the concepts.
- Shading: A message is now displayed upon exit of the 3D dialog when the Partial Shading Calc selection is less than 5% of the total area or less than 10 tables

* Corrections

- Backtracking: the number of trackers with a higher GCR is now recomputed upon changing the backtracking reference tracker
- Bifacial: The calculation of the rear-side diffuse contribution for horizontal PV tables, and the corresponding loss diagram have been corrected (regression in V8.0.13)
- Components, PAN file: the numerical value of Voc in the PV module definition window is no longer affected by numerical imprecision
- Detailed Results: the absence of default variables for monthly plots no longer causes crashes
- Shadings: "Print" output now processes all orientations
- Shadings, thin objects: the partition model results in presence of thin objects have been corrected. This may impact the simulation results, by increasing the electrical shadings slightly in some cases (**).
- Report: Fix for partial shading always reporting 100%
- Report: the units of energy results are now correct

> Check also dedicated page for PVsystCLI changes

(**) More detailed information available on PVsyst FAQ (topic "PVsyst 8.0.13: main changes").

* Improvements

- Demo projects: new demo commercial project
- Databases update
- Economic evaluation: "Production variation (aging)" is renamed to "Module degradation" and now only positive values are allowed
- Economic evaluation: optimizers are now handled in the installation costs
- Optimizers, SolarEdge and Sungrow: database update
- Power Factor: update and clarification of the help page
- Report: grid limitation mode is now displayed when applied
- Report: module PAN file name displayed when custom
- System design: overload losses are now adjusted when a Power Factor is specified in "energy management" (*)
- System Sizing: Warning messages for inverters slightly or strongly undersized are now triggering above 2% and 4% overload losses, respectively. These errors are not fatal anymore (*).

* Corrections

- 3D scene: the number of modules per table are now correctly computed when importing a H2P file
- 3D scene: the bottom cell size is now taken into account also when computing the shading factor table from the Near shadings window (*)
- 3D scene: display of the 3D scene works correctly with missing ground image and generating a report no longer causes crashes
- 3D scene: shading factor tables calculation is now faster on large scenes
- 3D scene: DAE/PVC files with complex objects are now imported faster
- Bifacial: corrected calculation of the sky diffuse contribution on the rear side of the PV modules (*)
- Bifacial: saving PRBifi no longer causes crashes
- Detailed losses: dragging a point in the IAM curves no longer causes display issues
- Detailed Results: the values of apparent and reactive energy in hourly graphs and monthly hourly table are now correct
- Economic evaluation: corrected inconsistencies and display issues in the "Financial Parameters" section
- Module layout: IV curves for non-relevant orientations are no longer shown
- Optimizers: selecting modules with small Isc no longer causes crashes
- Optimizers: minor corrections for AMPTstring optimizers
- Orientation: azimuth limits are now properly enforced when using the visual tool to set table orientation
- Shadings, diffuse: correction of diffuse shading loss calculation for low sun angles and average orientations
- Self-consumption: daily hourly profile is now normalized and saved properly
- System: when using power sharing, the contractual DC power limit of the inverter is now applied correctly.

(*) More detailed information available on PVsyst FAQ (topic "PVsyst 8.0.13: main changes").

* Improvements

- Backtracking management tool: all tracker orientations are now displayed, including those in error
- Bifacial: diffuse irradiance on the ground (DiffGnd) is now available for export
- Bifacial: the bifacial performance ratio (PRBifi) now accounts for the bifaciality factor (*)
- Bifacial: the default upper limit for the bifaciality factor has been increased to 98%
- Databases update
- Report: the bifacial performance ratio (PRBifi) is now displayed in the report and monthly tables (*)
- Weather data: ability to choose the TGY data source when importing SolarAnywhere data (latest or 2023).

* Corrections

- 3D scene: negative values no longer appear in the "split" electrical shading tables when thin objects are present in the 3D scene
- Bifacial: in mixed orientations subarrays, the rear mismatch losses now account for the mismatch factor from both orientations
- General: an issue linked to remote file downloads no longer causes crashes
- Grid storage, Weak grid islanding: the unused energy is now correctly accounted for when the grid is unavailable
- Grid storage: buttons and values now update correctly when defining a self-consumption profile
- Optimizers: minor update of the optimizers MPP choice under partial shadings with module layout shading model (*)
- Orientation: cases where opposite azimuths were identified as the same orientation are now resolved
- Report: importing a variant with valid results now keeps its related Site and Weather file names available to consult
- Report: irradiance and Energy units defined in preferences are now used in the report
- Report: predefined graph names are now properly translated
- Report: the description of the medium voltage line is now correct
- Weather data, Solargis: importing monthly data with a non-integer timezone (e.g., India with UTC+5:30) no longer causes crashes
- Weather data, sub-hourly data import: looser verification whenever GHI average, min., max. are closer than 0.1 W/m²
- Weather data, sub-hourly data import: the end of hour detection now works even when the time stamp does not include the year
- Weather data, Vaisala: TMY import now manages GHI data correctly
- Weather data: API-related issue no longer causes crashes
- Weather data: importing empty csv files no longer causes crashes
- Weather data: selecting variables for monthly weather data computation no longer causes crashes.

(*) More detailed information available on PVsyst FAQ (topic "PVsyst 8.0.12: main changes").

* Corrections
- Fixed an issue preventing crash analytics to be shared alongside anonymous analytics data
- Detailed losses: user interface for HV and MV transformers works again correctly.