High tech down on the farm

Tesvolt GmbH, Wittenberg: nominated for a German Entrepreneur Award 2018 in the Rising Star category

Intelligent battery storage systems that pay off – Tesvolt has developed a vital building block for the clean energy revolution. Unrivalled worldwide, the outstanding development and strong prospects of a product that is unrivalled worldwide have earned this groundbreaking company from Wittenberg a nomination for a German Entrepreneur Award 2018 in the Rising Star category.

About the company

Year established 2014
Founders Daniel Hannemann, Simon Schandert
Seed Capital 25,000 euros
Turnover 2017 over 10 mil. euros
Employees 40

Today, a large percentage of our power is generated from renewable sources. The problem, however, lies in storing it until it is needed. “Conventional storage options are inefficient and therefore often unprofitable”, says Tesvolt founder Daniel Hannemann (32). There are technical reasons for this: such a storage unit contains a number of individual batteries which in practice age at different rates. Overall system storage performance, however, is based on the weakest element. In conventional systems the more powerful batteries are artificially restricted and excess power is converted into thermal energy and lost. By contrast, Tesvolt's intelligent battery management monitors the voltage of each individual cell and distributes charge from one cell to the next until every cell is equally balanced. “In effect practically all the stored energy can be used”, explains co-founder Simon Schandert (29). The German Entrepreneur Awards panel of experts were thrilled with this positive contribution to the transition to clean energy: “An outstanding concept and a sound, groundbreaking solution for the growing market in energy storage.”

Then things really took off. The demand was there and we had extensive contacts within the photovoltaic sector.


The idea of the two school friends, who grew up in the countryside, evolved out of practical necessity. Daniel Hannemann and Simon Schandert were already active in the photovoltaic sector, specifically for farmers who had their own solar or wind turbines. “Customers kept on asking for more efficient storage units, but there were no such products on the market.” The two engineers got together, delved into their savings and developed a prototype on the farm of Daniel Hannemann's parents. “We knew exactly what farmers needed.” The founders put their noses to the grindstone for a year until the first storage unit was in place. “Then things really took off. The demand was there and we had extensive contacts within the photovoltaic sector.” A major selling point of the founders, who had experienced the collapse of the solar industry at close quarters, was: “Our storage systems are economical even without subsidies.”. Moreover, the two engineers only use components from reputable manufacturers; batteries from Samsung and inverters from SMA. Tesvolt has partnership agreements with both corporations. The founders are also committed to using cables, boards and other components 'Made in Germany'. “Our aim is not to be cheap but to provide perfect quality.” Meanwhile, the technology leader has more than a thousand clients using their multi-patented systems , not just in the agricultural sector but industrial and commercial sectors too. Then there are numerous projects in Africa, Oman and Australia. The founders are now planning Germany's first fully automated and digitised manufacturing process for batteries, “a German gigafactory”. They also want to continue shortening lead times and driving technical development.

Tesvolt GmbH

Daniel Hannemann
T(03491) 87 97 100


The panel praised their “ good business figures and great development” as well as “sustainable approach with a clear corporate strategy” and nominated Tesvolt for a German Entrepreneur Award 2018 in the Rising Star category. “We have been taken by complete surprise and feel deeply honoured” exclaimed the entrepreneurs. “The recognition will help to boost awareness of us among potential clients and make recruiting easier. We also want to motivate others to get their own ideas out there on the table, because Germany is a great place to develop new technologies.”