TOP-Energy^® 3.3
Your Energy System Optimization Software

Modeling, Simulating, and Optimizing Energy Systems

TOP-Energy^® analyzes and evaluates complex energy systems. The comparison of different variants enables efficiency increases, reveals savings potential, and supports investment decisions.

With TOP-Energy^®, you can model any energy system. A library of over 200 components from the electricity, heating, cooling, steam, compressed air, and mobility sectors is included. Ecological, economic, and primary energy optimizations reveal the perfect operation of your system. With variant comparisons, structural optimizations, and sensitivity analyses, you will find the best technology and the optimal plant sizes.

When planning energy systems, e.g., for neighborhoods, the combination of renewable and conventional energy producers from different sectors offers great potential, but also cross-influences that are difficult to control. At the latest, when operating strategies for storage systems are added, the possibilities of Excel tools or calculation with standards and rough estimates are exhausted. Then TOP-Energy^® will help.

TOP-Energy^® supports energy suppliers, engineering offices, power plant operators, and universities in mastering the major challenges of the future, which result from high ecological demands, complex legal requirements, and the premise of reducing costs. The software has been a reliable partner for planners and developers for many years. With its convenient and easy-to-use interface, TOP-Energy^® allows even the most complex systems to be optimized in their design and operation.

Our Offer

TOP-Energy^®

The tool of choice for your energy system.

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Workshops

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Services

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Your TOP-Energy Team

Whether software developers, mathematicians, or business economists—behind TOP-Energy is a team of 15 dedicated and creative minds working passionately on an innovative software solution for energy optimization. Our mission is to support companies and organizations from various industries in making their energy systems more efficient—whether independently or in close collaboration with us.

For over 20 years, TOP-Energy® has been developed by the Society for the Advancement of Applied Computer Science (GFaI) at the Technology Park Berlin-Adlershof. The simulation software grows steadily and improves continuously—thanks to our many years of experience, team spirit, and enthusiasm for mathematical optimization, technological innovations, and sustainable energy concepts.

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Our Research at GFaI

The team behind our software is part of the Energy System Engineering research department, one of nine specialist departments at the Society for the Advancement of Applied Computer Science (GFaI e. V.). In addition to the continuous development of TOP-Energy, we work on research into innovative methods for the life cycle analysis of product systems and the development of digital twins for energy systems.

GFaI also focuses on image processing and industrial applications, automation and optimization in production technology, and 3D data processing. The independent research and development institution has around 150 employees working on practical software solutions and methods that can be quickly and effectively integrated into business and industry.

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Our TOP-Energy User Days

The best ideas for a sustainable energy future?—They come from our customers! We provide the toolbox that allows you to solve even the trickiest questions surrounding your energy projects. And that’s exactly what we discuss at our TOP-Energy User Days — the annual highlight for everyone working with our optimization software. For two days, the motto is "By users, for users." This is where networks are built, best practices are exchanged, and new approaches are developed together.

In addition to insights into the latest developments from our research, there will be open discussion sessions, exciting news, and targeted training on the new software version. Municipal utilities, municipalities, energy service providers, planning offices, and researchers are invited—in short, everyone actively working toward a sustainable energy future.

Join us on June 3rd and 4th, 2025—register now!