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Polysun Online

the free solar calculator from Vela Solaris

Would you like to perform your system simulations on the internet?

Polysun Online is the perfect start and a good support for selling photovoltaic, solar thermal and heat pump systems. You can also simulate hybrid systems combining all three technologies.

Start your simulation now with Polysun Online


Your benefits

  • Easy and fast design of photovoltaic, solar thermal and heat pump systems
  • Calculation with accurate up-to-date weather data and extensive product databases
  • Support your sales with efficient and qualified offers and professional sales reports

I find the Online version a fantastic integration of the excellent Polysun toolbox. With the Online version every user gains access to the sector’s best tool without high initial costs.

- Dan, North Carolina