Polysun Simulation Software
State-of-the-art simulation
The Polysun product range includes all the tools you’ll ever need to design, enhance and simulate your systems in the field of renewable energies. Whether for heat pumps, solar thermal, photovoltaic or cooling systems Polysun is sure to provide you with the software that best suits your needs.
Unequalled flexibility in the design of systems with top-quality definition as well as yield and economic calculation features.
Polysun helps you in your daily work
- Time-saving, professional design
- Reliable yield forecasts including worldwide weather data and interpolation for user-defined locations
- Hassle-free enhancement of new and existing systems
- Output of all information required for any subsidy application
- Easy generation of comprehensive PDF reports
Download Video Tutorials
See our download page to watch some Polysun video tutorials.
Polysun Solarthermal Simulation provides comprehensive features for the analysis and definition of solar thermal systems. Polysun also provides the world’s largest and most comprehensive template selection. Polysun offers, amongst others, countless ready-made templates for domestic hot water, space heating, swimming pools and process heat. In combination with a constantly updated database including most commercially-available products you will obtain undreamt-of opportunities to design an efficient system. Polysun provides a wide range of tailored reports designed to present key data such as energy balance and payback period. details

Polysun Photovoltaic Simulation provides a huge selection of brands providing photovoltaic-modules and inverters. Dimension and modify your photovoltaic module, e.g. module surface and orientation, as you wish. Polysun helps the user choose the inverter that best suits given photovoltaic fields. Clear and detailed evaluations instil confidence and trust in customers and provide templates to support any subsidy applications. details

Polysun Heatpump Simulation provides a comprehensive selection of ready-made templates complete with schemes for domestic hot water and space heating. Consumers are freely definable. A huge brand-product database including heat pumps, ground-source loops, tanks, conventional heat generators, pumps and heat exchangers makes it possible to adapt your system to your changing needs.
Polysun provides an accurate and detailed depiction of these systems and easily calculates all variables required by experts such as, e.g. the performance factor. Polysun also provides invaluable support in dealing with all related economical issues. All results can be graphically displayed. details

Solar thermal cooling, quite simply the technology of the future, and the well-established compression cooling machine technology; both can be simulated on Polysun. Comprehensive cooling machine databases make your selection simple and practical. As in all other versions scheme templates are available here too. The absorption chiller can be primarily connected to a collector field and/or an auxiliary heating system. Secondarily Polysun takes care of the building cooling simulation; alternatively a freely defined load profile may be entered. details
Polysun guarantees an accurate and transparent simulation
Polysun has been on the market since 1992. Originally created at the Institut für Solartechnik SPF (Institute for solar technology), part of the Hochschule für Technik (Technical University) in Rapperswil (Switzerland) our software has been since continuously setting new and higher industry standards. Solid scientific foundations and its user-friendliness have made Polysun the preferred software solution for thousands of experts and well-established companies worldwide. Vela Solaris closely cooperates with universities and manufacturers to push Polysun’s development further everyday.
Polysun is available in three different user levels
Tailored solutions for all users to best meet everyone’s needs.
Polysun Light
Intuitive operation with wizards and hydraulic templates; quick and reliable
Polysun Professional
Super-easy to use; enter own components; high-quality sales support with a wide-range of result displays and countless templates
Polysun Designer
Leading, market-oriented software providing maximum flexibility in the design of large and complex systems; modularity in the creation of hydraulics; modular system assembly
Combination of products from the Polysun range
Polysun products may be combined in a variety of ways to best suit your needs and are the ideal solution for new buildings, redevelopment activities as well as for large, complex systems.
Polysun products are available in different languages
German, English, French, Italian, Spanish, Swedish, Portuguese, Czech, Greek, Rumanian and Chinese