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Press Release

Publisher: GmbH

Energy transition startup raises 7 million euros in Series A financing

From left to right: Michael Blichmann, Matthias Karger, Lars Rinn
© GmbH
Frankfurt am Main (renewablepress) - A total of four new investors are joining the company, while existing investors such as High-Tech Gründerfonds (HTGF) and renowned business angels are once again contributing fresh capital.

The four new Series A investors were selected consciously. The financing round is led by Cologne-based VC BitStone Capital, the leading PropTech fund with strong expertise in the real estate industry. As co-investors, the 10x Founders contribute extensive experience in the software-as-a-service sector and the impact investor BonVenture the clear sustainability focus. As an international investor from the energy industry, Helen Ventures from Finland is also participating in the financing round.

The software "opti.node" developed by simplifies the management of wind and solar plants. As the "digital lubricant of the energy transition", opti.node takes over the fulfillment of numerous bureaucratic requirements in particular: Billing, tax forms and notifications to the authorities can be easily created automatically with opti.node. The software is already being used to manage around 10,000 wind and solar power plants, making the market leader in Germany.

However, for Matthias Karger, founder and CEO of, this is just the beginning: "The future energy supply will be based on millions of renewable energy plants and every larger building will also be a power plant. Many new providers such as real estate managers and citizens' energy cooperatives are driving the change with new business models. In doing so, they are regularly confronted with the complicated rules and bureaucratic requirements of the energy market. This results in enormous market potential and further growth opportunities for us."

"Rising energy and CO2 prices and the desire for security of supply make renewable energy plants for real estate more attractive than ever. makes it easy for professional owners to evaluate this potential and to operate the plants successfully and in a legally secure manner. I am pleased to support the team in this socially important task," explains Marc Stilke, Venture Partner at BitStone Capital and future Chairman of the Advisory Board at will therefore invest the seven million euros received in the Series A in the further development of the software. The goal is to build a comprehensive software platform that enables professional plant operators in the commercial and real estate sectors to easily implement new business models such as direct solar power supply (e.g. tenant power or power purchase agreements/PPAs) and self-supply. For this purpose, the software will be supplemented with additional functions and expanded into an end-to-end solution platform.


Based in Frankfurt am Main, GmbH is a fast-growing company working towards a sustainable energy future. was founded in 2016 by Matthias Karger and Lars Rinn and develops and distributes the SaaS solution "opti.node" for professional operators of renewable energy plants. More than 9,500 wind turbines in over 2,500 wind and solar farms as well as more than 400 commercial and industrial properties are already using opti.node. In 2020, was honored with the Handelsblatt Energy Awards. Currently, employs about 50 people.

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Caption: From left to right: Michael Blichmann, Matthias Karger, Lars Rinn
© GmbH
Caption: team
© GmbH

Frankfurt am Main, 27 July 2022

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Media contact: GmbH
Philipp Petruschke
Head of Marketing & PR
Phone: +49 (0) 176 633 45901
E-Mail: GmbH
GreenTech Hub
Carl-von-Noorden Platz 5
60596 Frankfurt am Main

Phone: +49 (0)69 999 99 39 80


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