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Holistic energy system simulations for building and district planners


Polysun Designer depicts your energy system at an early planning stage. Systems can be built up quickly and potential for optimization revealed. This gives you planning security and convinces your customers with sophisticated and economical energy concepts. Polysun Designer intelligently combines applications to meet heating, cooling, electricity, and electromobility requirements.

Using simple drag-and-drop you can choose from 150,000 system components that are always up-to-date and simulate the interaction of the energy system in dynamic time steps up to a resolution of steps in seconds. You can define an intelligent control logic in a completely flexible manner, thereby additionally increasing the energy and cost efficiency of your solution.

Free and easy programming of control logics

More than 150,000 deposited energy system components

1,000 practice-tested templates for energy system concepts

Simulation of every market-standard technology – worldwide

Energetic monthly and annual balance sheets

Technical result reports and profitability calculation

Further features

Apply for licence – or try it for free

Have you already decided to purchase Polysun Designer? Then buy your licence conveniently from our online shop.

Do you need further information and want to gain your own experience first? Then request a free trial licence and find out how Polysun improves your planning quality, reduces energy system costs, and wins over your customers.

  • Free construction of hydraulic loops
  • Free definition of control and regulation strategies for hydraulics
  • Extensive product databases for heat pumps, photovoltaic modules, inverters, batteries, solar thermal collectors, cogeneration units and many more components
  • Detailed evaluations on a time-step, 15-minute, hourly or monthly basis
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Ask our Experts

Call or write to us and let our experts advise you without obligation or show you, free of charge via screen sharing how Polysun and Vela Solaris as partners help you convince customers.

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