ADS-TEC Energy Ends the Year With New Battery Energy Storage Wins in Germany and Austria

NÜRTINGEN, Germany--(BUSINESS WIRE)--Dec 30, 2025--

ADS-TEC Energy PLC (NASDAQ: ADSE) ends 2025 with a number of new wins for large-scale battery storage projects in Germany and Austria, reflecting growing demand for its battery energy storage solutions. The contracts secured in December alone represent a total capacity of 20 MW and 40 MWh and are all now in the detailed planning phase.

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“Towards the end of the year, our battery energy storage business gained significant traction. These newly signed projects reflect the trust that energy utilities are placing in us. These businesses increasingly value companies with long-standing experience, proven references and strong technical execution capabilities, and, across the entire value chain, this is where we are well positioned,” said Thomas Speidel, CEO of ADS-TEC Energy.

The new contracts build on a growing customer reference base in the battery energy storage market from large-scale systems operating successfully since 2016 to the recently announced project for Stadtwerke Ludwigsburg-Kornwestheim (SWLB) in Germany. SWLB selected a BESS5000 system with a capacity of five megawatt-hours (MWh) for integration with its biomass power plant to enhance grid stability while enabling participation in energy and ancillary service markets.

In early December, ADS-TEC Energy realized its first large-scale battery storage project in Austria at AAE Naturstrom. A BESS5000 system with a capacity of 5 MWh has been installed and commissioned on schedule. Its integration with a photovoltaic (PV) system demonstrates how locally generated solar power can be stored, flexibly marketed, and fed into the grid as required.

Another flagship ADS-TEC Energy large-scale battery storage project is a unique project in Germany that features a 1 GW grid connection and 2 GWh of storage capacity with a potential expansion to 4 GWh. “We are very satisfied with this project’s progress in 2025. The grid operator has obtained commitment for the grid connection and further planning and permissions are progressing at full speed. In 2026, we aim to reach ‘ready-to-build’ status,” added CEO Thomas Speidel.

Battery storage as a key enabler for grid integration and operational efficiency

Large-scale battery storage systems are critical for energy systems with high volumes of renewable power to store surplus electricity from wind and solar power, smooth peak loads and stabilize the grid. At the same time, they provide operators with attractive revenue opportunities including energy trading and the provision of ancillary and system services.

ADS-TEC Energy’s storage solutions combine high-performance battery technology with intelligent energy management systems that support multiple use cases at the same time and optimize performance for different markets. For energy utilities, battery storage is key to enhance energy management, grid operation, and the marketing of renewable energy.

About ADS-TEC Energy

With more than a decade of experience in lithium-ion technologies, ADS-TEC Energy develops and manufactures battery storage solutions and ultra-fast charging systems, including advanced energy management software. ADS-TEC Energy’s battery-buffered fast-charging technology enables electric vehicles to charge at ultra-high power levels even on weak grids, all within an exceptionally compact design.

Headquartered in Nürtingen, Baden-Württemberg, the company was nominated by the President of Germany for the German Future Prize and was inducted into the “Circle of Excellence” in 2022. The outstanding quality and performance of ADS-TEC Energy’s systems are the result of extensive investment in in-house development and high levels of vertical integration. With its advanced technology platforms, ADS-TEC Energy is a trusted partner for automotive manufacturers, energy providers, and charging infrastructure operators worldwide.

For more information, visit: www.ads-tec-energy.com

Installation of the BESS5000 at AAE Naturstrom in Kötschach-Mauthen, Austria, early December 2025

PARIS (AP) — Power problems and a stuck train interrupted rail traffic that flows through the undersea tunnel connecting the U.K. to continental Europe on Tuesday, with passenger train operator Eurostar indefinitely suspending its services to and from London during the busy end-of-year holiday period.

Eurostar blamed “overhead power supply issues in the Channel Tunnel” and what it said was a failed train operated by LeShuttle, which transports vehicle traffic by rail through the tunnel, to and from the French port of Calais and the U.K. port of Folkestone.

Eurostar said in a statement that its services to and from London “are suspended until further notice" and advised its passengers to rebook their journeys for other days.

The Channel Tunnel's operator, Eurotunnel, said in a separate statement that the power supply problem started overnight Monday in part of the tunnel, impacting both passenger and vehicle travel by rail in both directions through the tunnel.

It said traffic is expected to resume gradually on Tuesday afternoon.

“A technical intervention is required, which is currently underway,” it said. “Our teams are working to restore the situation as quickly as possible.”

Passengers queue to enter the Eurotunnel site in Folkestone in Kent, England, Tuesday, Dec. 30, 2025. (Gareth Fuller/PA via AP)

FILE - A train coming from London leaves the Northbound Channel tunnel in Calais, northern France, on Jan. 31, 2020. (AP Photo/Thibault Camus, File)