Wittenberg/Germany, 25 November 2025 – The new commercial energy storage system Tesvolt Forton has proven itself in the field. This has been reported by battery storage provider Tesvolt and its subsidiary Tesvolt Energy. Over several months, the outdoor storage system was tested in ten different customer projects. Those storage systems used exclusively for energy trading are already generating monthly revenues in the four- to five-figure range. Tesvolt Forton has also demonstrated its effectiveness in classic applications such as optimising self-consumption and peak shaving.
Lessons Learned
“Field tests are extremely important – especially when using battery storage systems for energy trading as this significantly raises the requirements for hardware, software and technical support,” says Leonard Friese, Product Manager at Tesvolt. “We learned a lot during the field tests. At first, there were several technical hurdles, then only occasional minor issues – and finally the moment came when everything ran smoothly on a permanent basis.”
Early Coordination with Grid Operators is Key
“The field test phase helped us optimise new project workflows and internal processes. Initially, it took several days to digitally integrate a new storage project into our virtual power plant together with the traders. Now it’s just a few steps, usually completed within half a day,” explains Juri von Wilcken, Product Manager at Tesvolt Energy. The start-up aggregates commercial energy storage systems into a virtual power plant, enabling even smaller battery systems to participate in energy trading on the electricity exchange. “We also learned how essential it is to engage with the relevant grid operators already during the early project initiation phase, to ensure that the start of commercial operation is not unnecessarily delayed.”
Storage Systems in Energy Trading Generate High Revenues
“Energy trading is creating a gold rush atmosphere in the energy storage industry right now. But I wanted to try it out first before offering the Forton and the business model to my customers. Now I know: it works. The storage systems run smoothly and generate the forecasted revenues. This means they will pay for themselves in about five to six years,” says Johannes Mitterreiter, Managing Director of the electrical engineering company Reichbrandstätter in Southern Germany. “I have four Forton units on my company premises. When customers see them and I show them the revenues, they want a piece of the pie too – they want to join in energy trading.”
Until now, operators of commercial battery storage systems have had very limited opportunities to find a trader willing to market their smaller storage capacities on the power exchange. Tesvolt Energy aggregates these systems and connects them to the grid as part of a pooled asset, enabling their capacity to be marketed by three of Germany’s most renowned energy traders. By introducing competition between the traders, the start-up ensures particularly attractive returns and reduced risk for customers. Participation is possible for anyone with a grid connection of at least 50 kW and a battery storage system starting from 50 kW.
15-Year Performance Guarantee
“Commercial storage has never been this economical. Technically, this is only possible with a battery storage system that is extremely robust – capable of being charged and discharged several times a day over many years,” explains Simon Schandert, CTO and Co-Founder of Tesvolt. “Tesvolt Energy’s intelligent software also ensures that the storage system is operated as profitably as possible while being as gentle as necessary.”
Virtual Storage Power Plant is Growing
“Since the field tests were completed, we’ve been receiving even more orders from customers who want to use Forton for energy trading. We are therefore onboarding more and more storage systems into our virtual power plant,” reports von Wilcken. “Two-thirds of all orders are for Forton units intended for trading, while one-third are for classic applications such as optimising self-consumption and peak shaving – which remain highly profitable.”
About TESVOLT ENERGY
TESVOLT ENERGY GmbH is a software start-up based in Berlin. TESVOLT ENERGY’s intelligent software enables battery storage systems from as little as 50 kW to participate in front-of-the-meter energy trading, delivering very high revenues while ensuring long service life. As a wholly owned subsidiary of TESVOLT AG, the company also benefits from its parent’s expertise in battery storage and project business experience.
Together with TESVOLT, TESVOLT ENERGY offers customers a complete solution: high-performance battery storage systems, installation and maintenance through certified specialist partners, and energy trading.
www.tesvolt-energy.com
TESVOLT AG is a leading European full-service provider of innovative energy storage system solutions for commerce and industry. We are driving the energy transition and empowering companies with free, decentralised energy use and profitable electricity trading. We combine advanced battery storage technology with intelligent software and a flexible retail strategy - for maximum cost efficiency and data security made in Germany. Our solutions liberate companies from fossil fuels and economic constraints. We manufacture the commercial storage system solutions in series production in a carbon-neutral gigafactory at our headquarters in Lutherstadt Wittenberg.
TESVOLT was founded in 2014. The group includes the subsidiary TESVOLT ENERGY GmbH, which enables profitable energy trading for commerce and industry, and the joint venture TESVOLT OCEAN GmbH, which provides maritime shipping companies with high-performance battery storage solutions for challenging conditions at sea.
Corporate & Financial Communications
Phone: +49 3491 8797-367 / +49 3491 8797-323
E-mail: presse@tesvolt.com
by Cicero Design
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