Vela Solaris AG

Vela Solaris AG is a Swiss software company that develops and sells Polysun, a simulation and planning software suite for energy systems in buildings and districts. Founded in 2006 as a spin-off from the Institute for Solar Technology (SPF) at the University of Applied Sciences Rapperswil (HSR), the company commercialised simulation models and programs that had been developed since 1975 by Martin Zogg and further advanced at SPF from 1992. Vela Solaris is headquartered in Winterthur, Switzerland, and serves engineers, manufacturers, energy utilities, and academic institutions worldwide. Polysun enables users to design, simulate, and optimise a wide range of energy systems, including heating, cooling, domestic hot water, photovoltaics, solar thermal, heat pumps, district heating networks, and combined energy centres. The software supports variant comparisons for new builds and renovation projects, helping planners evaluate economic efficiency, self-consumption, degree of autarky, and CO2 savings. A cloud-based API allows simulations to be run remotely. According to the company, more than 1,000 engineering firms, component manufacturers and distributors, energy service providers, and universities trust its software and services. Vela Solaris positions itself as a provider of reliable, precise, and transparent planning tools that accelerate the development of efficient, holistic energy systems. The company emphasises scientific exchange, close customer collaboration, and continuous innovation.

The origins of Vela Solaris' core technology date back to 1975, when Martin Zogg began developing simulation models and programs for energy systems. From 1992, these models were further developed at the renowned Institute for Solar Technology (SPF) at the University of Applied Sciences Rapperswil (HSR) in Switzerland. This academic lineage provided a strong scientific foundation for what would become the Polysun software. In 2006, Vela Solaris AG was founded as a spin-off from SPF to commercialise and further advance the simulation technology. Since then, the company has continuously refined its energy system simulation capabilities and expanded the software to cover new energy production technologies. Over the years, Polysun has evolved into a comprehensive planning tool used by engineers, manufacturers, energy utilities, and universities. Today, Vela Solaris is headquartered in Winterthur, Switzerland, and reports that more than 1,000 recognised engineering firms, manufacturers and distributors of energy system components, energy service providers, and universities worldwide rely on its software and services. The company remains focused on accelerating the development of efficient, holistic energy systems through digital innovation and close collaboration with customers and research institutions.

• 2006

  Vela Solaris AG founded as a spin-off from SPF.

• 1992

  Further development of simulation models at the Institute for Solar Technology (SPF) at HSR Rapperswil.

• 1975

  Martin Zogg begins developing simulation models and programs for energy systems.

Professional planning software for reliable design and optimisation of building and district energy systems, emphasising precision, transparency, and long-standing experience.

• Polysun

  Simulation and planning software for energy systems in buildings and districts, covering heating, cooling, DHW, PV, solar thermal, heat pumps, district heating, and energy centres.

• Polysun API

  Cloud-based API for running simulations remotely.

1. 1Planungssoftware für Energiesysteme | Polysunvelasolaris.com
2. 2Über Vela Solaris – Unsere Geschichte, unsere Wertevelasolaris.com
3. 3Vela Solaris AGwikidata.org