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Energy Decisions Made Easy


Inventory of Your Energy System

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Digital Energy Concepts

What is

greenventory is a high-tech startup from Freiburg, which has made it its mission to bring the energy transition in the cities.

For this purpose, we offer our customers the necessary decision-making and data basis to enable forward-looking planning of energy systems.


Software for Energy Transition

greenventory offers a software based solution for mapping and analysis of custom energy systems. For this purpose, a large number of data sources are brought together, evaluated and used to build a building-ready data base for the energy system. Based on this, options for action can be evaluated transparently and future development paths can be explored.


Scientists and Engineers

Based on this, options for action can be evaluated transparently and future development paths can be explored. We are a dedicated team of scientists and engineers with fun with data and the simulation and optimization of energy systems.


Forward Looking

Our understanding of both humans and the environment creates the foundation for future-oriented and customer-oriented results.

We empower people of action with the data and tools they need to design the transition towards sustainable energy.

Freiburg from the sky

With the software solution developed by Greenventory, utilities, network operators and cities can individually map, analyze and improve their energy system.


Inventory of your energy system.

From hundreds of data sources, we capture the status quo and deliver what you need for your job.

Data-Driven Decision Support.

Analyze your data, create scenarios and plan the future of your energy system.

Transparency and potential.

With our software for municipal energy transition and heat planning, you get full transparency on the local energy transition.
This enables you to identify clear goals, engage and inspire citizens, and convince key stakeholders with targeted measures. 

Custom projects.

We are happy to use our expertise to work with you to develop a tailor-made solution for your challenge. Here are some highlights of our range of services.

This Is what It Looks Like

Your Advantages

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More projects in the same time

Data acquisition at the touch of a button. Many important analyzes and calculations already integrated.


Transparency and Satisfied Customers

Through interactive, appealing visualization and practical export of the results, they communicate transparently and enthusiastically.

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Holistic View

Deliver analyses, scenarios and concepts. Cross-sector and of the highest quality.

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Sustainable energy systems

That's our goal! We enable you to present sustainable energy systems to your customers.

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Dr. Matthias Gebhardt

Renewable Energy Officer, TenneT TSO

greenventory helps us to improve forecasting and processes through increased transparency as well as better information on the more than 700,000 renewable generation plants in our grid area.


Frank Pilger

Head of Technology energis-Netzgesellschaft mbH

greenventory supports us with detailed load profiles, potentials and technology forecasts for network planning and also enables us to use company-wide synergies.

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Jochen Fischer

Managing director of the municipal utilities Müllheim-Staufen

greenventory visualized the PV potential of our municipality and provided our citizens with complex data in a transparent, understandable and traceable way. 


Stefan Ronzani

Department Manager Photovoltaics & Storage, Stadtwerke Stuttgart

With the help of greenventory, we are recording the photovoltaic potential of numerous buildings in the entire Stuttgart urban area in a highly efficient manner and thus developing a roadmap for the best possible implementation of photovoltaic expansion.


Prof. Dr. rer. pol. Wolf Fichtner

Chair of Energy Economics, KIT

greenventory has an excellent and highly motivated team that brings energy industry know-how and innovative methods, based on the latest research, into practical application. 


Thies Stillahn

Head of Innovation, EWS

greenventory helps us to create optimal energy concepts for collaborative local energy supply systems based on IoT data.


Prof. Christof Wittwer

Division Manager Electrical Energy Systems, Fraunhofer ISE

With the software-as-a-service solution developed at greenventory, the latest Fraunhofer know-how is directly applied by cities, energy suppliers and grid operators. 


Dr. Thomas Scheurle

CEO, BadenCampus

The greenventory team is characterized by technical expertise, a solution-oriented approach and a commitment to customer satisfaction. 

Do you want to drive forward the energy transition? Then join our team in one of the following positions

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Do you want to drive forward the energy transition? Then join our team!

We are currently looking for support in the following areas:

  • UX/UI Designer
  • Full Stack Developers
  • Software Engineers

Do you have a master thesis in mind? We are always happy to welcome new master students to our team.

Just send us your application with a short description of your motivation to: Your contact person is David Fischer.

Nothing fits exactly? Feel free to send us an unsolicited application anyway.

Applications are also welcome to be sent via JOIN!

The Founders

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Dr.-Ing. Sven Killinger

Founder, Commercial Director

Dr.-Ing. Sven Killinger

Founder, Commercial Director

Doctorate in industrial engineering Energy industry expert Senior Scientist Fraunhofer ISE

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Dr. David Fischer

Founder, Technical Director

Dr. David Fischer

Founder, Technical Director

Energy technology expert Expert in energy informatics Senior Scientist Fraunhofer ISE

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Dr.-Ing. Kai Mainzer

Founder, Head of R&D

Dr.-Ing. Kai Mainzer

Founder, Head of R&D

Expert Geoinformatics Optimization procedures and AI Group Leader Renewable Energies KIT