TESVOLT strengthens equity by EUR 18.6 million

Wittenberg, February 19, 2026 – TESVOLT AG, a German specialist in energy storage systems, battery park construction and the marketing of storage flexibility on the power exchange, has converted convertible bonds totaling EUR 18.6 million into equity. The conversion was carried out among key existing investors and strengthens the company’s equity base.

• Conversion among key existing investors improves equity base and financing headroom
• Step follows 50% revenue growth in 2025
• Rising returns in the energy storage market

Rising returns and falling component prices

In fiscal year 2025, TESVOLT recorded revenue growth of 50% compared with the previous year. Investors in the energy storage sector have also been achieving markedly rising returns for some time. The main drivers are the sharply declining prices for lithium batteries over the past two years and new applications for energy storage.

Daniel Hannemann, CEO and co-founder of TESVOLT, says: “In the market, we are seeing falling component prices and a growing importance of flexibility for the power grid – both of which are accelerating the profitability and rollout of storage in Germany. In this environment, TESVOLT is currently very well positioned: we offer battery storage, integration, operation and the marketing of storage flexibility on the power exchange from a single source – and we generate particularly high exchange revenues for our customers because we work with a trader benchmark model.”

Strengthening the equity base through the conversion of the convertible bonds follows TESVOLT’s extensive investments in new product developments, the build-up of its subsidiary TESVOLT ENERGY for the marketing of storage flexibility, and the expansion of its headquarters site in Wittenberg.

Market environment: expansion of storage capacity is accelerating

Total installed energy storage capacity in Germany reached around 24 GWh at the end of 2025. New installations increased by 47% in the industrial segment and by as much as 81% in the utility-scale segment compared with 2024. This is according to current data from researchers at RWTH Aachen University*.

With the expected increase in electricity demand driven by AI applications, data centers, and the continued electrification of other sectors, the development of new energy storage projects is likely to accelerate further. “In the coming years, the construction of mid-sized and larger energy storage projects will increase exponentially – we are only just at the beginning of the next storage wave,” Hannemann adds.

*https://battery-charts.de