Polysun 2026.6 – Release Notes – 7. July 2026
- New Feature: High temperature heat pumps can be simulated using profiles
- Software maintenance: Update of weather data to Meteonorm 8 (offline) and Meteonorm 9 (webservice)
- Optimization: Improved calculation of plate heat exchanger component
- Optimization: Improved building degree-hour heating load and heating energy demand model
- Optimization: Improved graphical evaluation
- Optimization: Changed property limits in waste water heat exchanger
- GUI Optimization: Global wizard is substituted by individual component wizard
- Standard templates: New templates with high temperature heat pumps added
- Catalog data: New air-water heat pumps added
- Catalog data: Updated solar collector catalog
- Catalog data: Updated photovoltaic and inverter catalogs
- Bugfix: Failing to simulate old programmable data logger fixed
- Bugfix: Failing to load user defined heat pump profile from another installation fixed
- Optimization: Large projects require about 20% less RAM and cause lower CPU utilization during simulations because of more effective in-memory representation of result data
Polysun 2026.5 – Release Notes – 13. May 2026
- Bug fix: Issues with report generation resolved
- Bug fix: Proxy handling for user-based licensing system improved
Polysun 2026.4 – Release Notes – 11. May 2026
- New Feature: Air-to-water heat pump can now be used for cooling
- Optimization: Improved calculation of component internal volumes
- Optimization: Warning message for excessive collector temperatures
- Optimization: Refined numerical calculation of coil heat exchanger temperature
- Optimization: Reduced computational load for borehole component
- Software maintenance: Results windows laid out more clearly
- Software maintenance: Multiple selection enabled in results windows
- Software maintenance: Memory management optimized
- Software maintenance: Improved sizing of catalog windows
- Standard templates: New templates for cooling applications with air-to-water heat pumps
- Catalog data: New catalog featuring air-to-water heat pumps for cooling applications
- Catalog data: Updated PV module and inverter catalogs
- Catalog data: Updated collector catalog
- Bug fix: Display error in the toolbar resolved
Polysun 2026.3 – Release Notes – 2. Mar 2026
- Software maintenance: New, user-based license system
- Software maintenance: Installer revised
- Software maintenance: Component toolbar further revised
- Catalog data: New heat pumps added
- Standard templates: New templates added and existing ones updated
- Bug fix: Inconsistency in the number of possible MPP trackers in the inverter catalog fixed
Polysun 2026.2 – Release Notes – 4. Feb 2026
- Bugfix: Calculation of thermal resistance of heat pumps revised
Polysun 2026.1 – Release Notes – 2. Feb 2026
- Optimization: Improved accuracy of heat flow meter
- Optimization: Revised solar thermal energy calculation model
- Optimization: Adjusted thermal resistance of heat pumps
- Optimization: Buildings can be defined in the degree-hour model via heating load and heating energy demand
- Software maintenance: Made the “System diagram” and “Results” menus more convenient
- Software maintenance: Component toolbar revised
- Standard templates: New templates for cooling applications added
- Standard templates: Some templates revised
- Catalog data: New heat pumps added
- Catalog data: Automatic synchronization with Solar Keymark database
- Catalog data: New PVT collectors added
- Catalog data: PV module catalog updated
Polysun 2025.12 – Release Notes – 9. Dec 2025
- Performance optimisation: Building model
- New templates: Peak shaving
- New templates: Waste heat recovery for data centres
- Catalogue data: New Combined Heat and Power Units
Polysun 2025.11 – Release Notes – 21. Oct 2025
- Optimization: GeoCollect component revised
- Optimization: “Catalogs” menu made more user-friendly
- Software maintenance: Various performance optimizations
- Software maintenance: Texts, translations, and tooltips optimized
- Software maintenance: Wizard expiry notice adjusted
- Standard templates: Some templates revised; outdated templates hidden
- Catalog data: Various enhancements and adjustments
- Fix: Incorrect behavior in the “Horizon Editor” dialog box fixed
Polysun 2025.10 – Release Notes – 24. Sep 2025
- Software maintenance: OpenStreetMaps retrieval switched to https
- Software maintenance: Wizard made available again
Polysun 2025.9 – Release Notes – 16. Sep 2025
- Optimization: Improvement of the search function in the template navigator
- Optimization: Visual revisions in the template navigator
Polysun 2025.8 – Release Notes – 28. Aug 2025
- New feature: Template navigator for selecting suitable templates
- New component: GeoCollect earth tank available
- Standard templates: Templates with GeoCollect earth tank added
- Standard templates: Expansion of heat pump templates
- Standard templates: More than 60 new templates available
- Optimization: Display of energy deficit in variant comparison
- Optimization: Automatic selection of solver
- Optimization: Adaptation of building symbols to use cases
- Software maintenance: Outdated report formats removed
- Catalogue data: Expansion and update of PVT and collector catalogue
- Catalogue data: Revision of some parameters for insulation material and building loads
- Catalogue data: Update of the PV module catalogue
- Catalogue data: Update of Sunerg devices
- Catalogue data: Expansion of various catalogues
Polysun 2025.7 – Release Notes – 3. Jul 2025
- Bugfix: Conversion of solar thermal catalog data revised
Polysun 2025.6 – Release Notes – 26. Jun 2025
- Software maintenance: Solar thermal simulation updated to current collector standard
- Optimization: Addition of recooling power to the component results for heat-driven chillers
- Optimization: Extended results for borehole component and groundwater loop
- Optimization: Pipe lengths checked for plausibility
- Optimization: Alphabetical order of results
- Optimization: Improved algorithm for calculating the maximum heating demand in the degree-hour model
- Catalog data: Collector and PVT database converted to new collector standard
- Catalog data: Extension and update of the collector catalog
Polysun 2025.5 – Release Notes – 16. Jun 2025
Withdrawn
Polysun 2025.4 – Release Notes – 7. Apr 2025
- New component: Waste water heat exchanger now available in Polysun
- Optimization: Thermal resistance and internal volume of heat pump adjusted
- Optimization: Default solver changed to “enhanced”
- Standard templates: Templates with waste water heat exchanger added
- Catalog data: Update of the PV database
- Catalog data: New cooling elements added
- Catalog data: Some Viessmann heat pumps enhanced with high temperature range
- Software maintenance: Results concerning expired subsidy programs removed
Polysun 2025.3 – Release Notes – 26. Feb 2025
- Bugfix: Missing values in graphical simulation analysis fixed
- Bugfix: Display of tabular results – time-step-values fixed
Polysun 2025.2 – Release Notes – 28. Jan 2025
- Bugfix: Fixed simulation analysis not working in some cases
Polysun 2025.1 – Release Notes – 14. Jan 2025
- Optimization: More accurate interpretation of use cases with Energy Sink/Source Component
- Optimization: Algorithm for the plate heat exchanger improved
- Optimization: More consistent calculation of energy balances
- Optimization: RAM requirements reduced and utilisation improved
- Optimization: Improved handling of simulation results saves simulation time
- Standard templates: Templates with sink-source component revised
- Standard templates: Various templates updated
- Company templates: New Smart Energy Engineering templates added
- Profile updates: New profiles for weather and hot water demand with focus on USA.
- Catalogue data: Update of the PV database
- Catalogue data: Update of solar collectors
- Bugfix: Storage of manually entered costs in profitability calculation fixed
- Bugfix: Incorrect warning messages resolved
Polysun 2024.8 – Release Notes – 8. Oct 2024
- Catalog data: Double assignment of catalog-IDs corrected
Polysun 2024.7 – Release Notes – 2. Oct 2024
- New feature: Adjustable gain calculation coefficient in degree hours cooling model
- Optimization: Adjustment of memory utilisation after RAM upgrade
- Optimization: Improved port and proxy handling of the activation wizard
- Optimization: Reduced memory usage for geothermal probe profiles
- Optimization: Improved memory handling when closing projects
- Standard templates: Templates revised and new ones added
- Company templates: B-Solartec folder added
- Catalog data: New heat pumps added
- Bugfix: Difficulties with some character sets in file names and profiles fixed
- Bugfix: Calculation of the inverter cut off corrected
Polysun 2024.6 – Release Notes – 7. Aug 2024
- Optimization: Simulation times with a programmable controller
- Optimization: Energy sink/source
- Optimization: Integration of PV panels from Polysun SPT
- Standard templates: New multi-family house templates
- Standard templates: New cooling system templates
- Optimization: Energy deficit is displayed for the quasi-dynamic model
Polysun 2024.5 – Release Notes – 5. Jun 2024
- New feature: Cooling implemented in comprehensive building model
- Optimization: GUI cleaned
- Optimization: More precise values possible for mutual shading
- Standard templates: Cooling templates cleaned
Polysun 2024.4 – Release Notes – 2. May 2024
Withdrawn
Polysun 2024.3 – Release Notes – 15. Apr 2024
- Optimization: License management adjusted
Polysun 2024.2 – Release Notes – 7. Mar 2024
- Optimization: Display of total energy consumption (Quse) in all building models
- Fix: Calculation of the annual cumulative damage in batteries corrected
- Standard templates: Manufacturer-specific templates revised and expanded
- Catalog updates: Additional heat pumps added
- Catalog updates: PVT components revised and expanded
- Catalog updates: PV catalog updated
Polysun 2024.1 – Release Notes – 22. Jan 2024
- Feature: New online user manual available in Polysun
- Catalog updates: More heat pumps added