Update

• 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.