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Heat Pump Schematic Diagrams: TOP 6 Practice-Proven Solutions

Learn how to optimize system efficiency and prevent costly planning errors with these six...

Data Center Heat Reuse: Regulatory Requirements, Typical Use Cases and Optimal Planning

Data Center Heat Reuse: Regulatory Requirements, Typical Use Cases and Optimal Planning

Kick-start the New Year with Polysun – and Save up to 30% with Our Christmas Offer!

The end of the year is the ideal moment to position your upcoming projects...

Buffer tanks in parallel or in series: How to achieve planning reliability and cost-effectiveness

The choice of connecting the buffer tank parallel or in series directly impacts the...

Cascade Heating: Application Range, Sizing, and Optimization

What Is Cascade Heating? A cascade heating system is a setup in which multiple...

Sewer heat recovery: unlocking urban energy potential

Urban areas face unique challenges in the energy transition: limited space for solar panels...

Solar PV-T: Benefits, Use Cases, Design and Optimization

Solar PV-T panels simultaneously convert solar energy into electricity and hot water, eliminating the...

HVAC Design Software vs. Heating Load Calculation Software: What’s the Difference?

In the realm of energy modeling, many professionals encounter the terms HVAC Design Software...

Top 12 heat pump design software

Update: February 2025 Simulation of heat pump systems is essential for accurate heat pump...

Heat pump control: Which settings and components optimize the combination with photovoltaics?

In practical projects, different heat pump control systems were examined to see how they...

Leadership transition: Samuel Gähwiler becomes the new Managing Director at Vela Solaris

Vela Solaris, a leading provider of software solutions for the planning and optimization of...

Advanced District Heating Software for Municipal Planning

District Heating Software: An overview

Discover our new support page

Check out the new content on our support page online and improve your Polysun...

Reliable planning of energy systems for multi-family houses

Energy concepts for multi-family houses can be planned and compared quickly and thoroughly to...

Recommend Polysun and get a reward

Recommend us to others - it pays off twice!

Integrated planning of energy systems – Simulation software for the holistic evaluation of energy system variantsIntegrated planning of energy systems

Integrated planning of energy systems - Simulation software for the holistic evaluation of energy...

Vela Solaris at Renewable Energy Exhibition in Japan

The Renewable Energy Exhibition in Tokyo took place from January 31 to February 2,...

SuWoTec and ANT

SuWoTec together with ANT provide a circular system approach to the Dutch market.

Energy solutions at GETEC

Polysun supports the planning and simulation of energy solutions at GETEC

TESVOLT

TESVOLT partners use the project planner to design battery systems online and order them...

ISH 2023 – Count us In!

After a four-year break, the International Sanitary and Heating Fair (ISH) will be held...

Mainova

Mainova provides sustainable energy for the Eintracht family!

Customers ask us: Post # 1

Customers ask us: Post # 1. To what extent does the installation of a...

EnBW Contracting

EnBW Contracting plans future-oriented energy supply concepts for the housing industry with Polysun.

eZeit Ingenieure

eZeit Ingenieure reliable planning and execution of energy-efficient renovations

Welcome Michael!

Since the beginning of the year Michael Hönes strengthens the team of Vela Solaris....

suissetec

The building technology association suissetec launches the web app "Building Technology Calculator" and relies...

Grünheide (DE) urban district heating design

reich+hölscher dares to break new ground and convinces with an innovative energy concept -...

Phase Change Material (PCM): Successful Simulation of Latent Thermal Storage with Polysun

A latent thermal storage system with PCM capsules is simulated in Polysun in an...

Education and Sports Campus Bürstadt, Hessen, Germany

Team für Technik convinces with simulation-based planning by Vela Solaris - Polysun.

Polysun by Vela Solaris with advanced BIM functions

Software enables digital simulation of energy systems for holistic, optimized and visionary construction projects...

levelup with Polysun

For the planning of the solar energy system, the interdisciplinary levelup team relies on...

Peak Shaving with Commercial Battery Storage – Demand is Rising

Polysun is mentioned as a simulation software for storage integration by pv magazine.

SunPeople project builds energy simulation platform – using the Polysun API

The Interreg FCE SunPeople project aims to increase the development of a decarbonised heat...

Polysun is accredited by Minergie

Our simulation software Polysun is now officially accredited by Minergie for the calculation of...

Polysun goes BIM: The new Polysun release increases planning quality!

The actual software release of Polysun makes the use of simulation of energy systems...

Tenna does an internship at Vela Solaris

Tenna Söndergaard is currently doing an internship year at Vela Solaris. This is an...

Vaillant Group

The Vaillant Group relies on the simulation software Polysun from Vela Solaris for the...

Clever use of simulation in BIM projects: This makes planning fun!

BIM (Building Information Modeling) raises high expectations for time and cost savings and for...

Stadtwerke Düsseldorf

Stadtwerke Düsseldorf offers its customers convincing energy solutions. The Polysun software is the tool...

Angela Krainer is new managing director of Vela Solaris

Since January 2020 Angela Krainer has been responsible for sales and marketing at Vela...

Polysun 11.1 reaches top performance scores

Polysun, the leading software for planning and simulating building-integrated energy systems has just become...

Die Überseeinsel

Thanks to its proven competence in the field of system simulation, the planning office...

Aparthotel in Bern

Innovative energy concept that combines ice energy storage with PV-T On the former site...

Meier Tobler

Polysun has been successfully used in sales at Meier Tobler for years. Yield calculations...

Lucerne University of Applied Sciences and Arts

The Lucerne University of Applied Sciences and Arts – Engineering & Architecture – has...

Technical University of Dresden

The Chair of Building Energy Systems and Heat Supply is dedicated to current research...

Dalarna University

Solar energy training with Polysun For more than 30 years, the Solar Energy Research...

BayWa r.e.

BayWa r.e. is a leading global provider of energy solutions in the field of...

EKZ

Innovative pilot projects at EKZ EKZ (one of the largest Swiss utility companies) is...

PVSEC 2017 Publication

Two communication libraries were developed that enable the co-simulation of IEC 61499 control applications...

Solar Thermal System Design: Automated Optimization with Software-in-the-Loop

Effective solar thermal system design is essential for maximizing energy efficiency and cost savings...

First solar hydrogen storage in a private building in Western Switzerland: building energy analysis and schematic design

Buildings have a great potential to produce their own electricity thanks to affordable photovoltaics...

Vallidation of an Ice Storage Model and its Integration into a Solar-Ice System

Ice storages allow the storing of solar heat in a compact volume for the...

BIM Use-Case: Model-Based Performance Optimization

This contribution demonstrates the application of a building information modeling (BIM) use case including...

Master’s thesis: Development of model-based control applications compliant with IEC 61499 for building energy systems with a focus on photovoltaics

Political marginal conditions for PV systems, such as feed-in limitations have resulted in the...

PVSEC 2017 Publication

Two communication libraries were developed that enable the co-simulation of IEC 61499 control applications...