ADS-TEC Energy PLC (NASDAQ: ADSE), a specialist in battery-based energy storage and fast-charging solutions, announced that the permitting authority has confirmed that all application documents are complete for its battery energy storage power plant at the Pulverdingen substation. The building permit is expected shortly.

Permit Application Declared Complete

The project, located in Markgröningen in Baden-Württemberg, Germany, is planned with a power output of approximately 1 gigawatt (GW) and a storage capacity of 4 gigawatt-hours (GWh). The company states the facility is intended to become one of the largest battery storage systems in Europe. Grid connection is targeted for 2029.

Power-Plant Scale Facility

The scale of the planned installation is considerable. According to the company, one gigawatt is roughly equivalent to the output of a large coal-fired or nuclear power plant or of 250 wind turbines.

The battery power plant is designed to deliver this output for approximately four hours, which the company says corresponds to the daily electricity consumption of around 400,000 single-family homes or 800,000 apartments.

Investment in a facility of this scale typically ranges from the high hundreds of millions to around USD 1.11 billion.

Multiple Value Streams for ADS-TEC Energy

From 2029 onwards, the facility has the potential to become a long-term value driver for ADS-TEC Energy in three ways: through the proprietary battery management technology deployed in the plant, through technical services over the plant's operating life, and through a continuing stake in the project company.

According to third-party market data cited in the announcement, large-scale battery storage systems in Germany have recently achieved revenues of approximately USD 167,100 to 278,500 per megawatt per year from wholesale trading and balancing markets.

The company notes that such revenues accrue at the plant level and are shared among the owners of the project company and that ADS-TEC Energy's share will depend on the outcome of the investor process, the final partnership structure, and future market conditions. The company explicitly states these figures are not a forecast and do not constitute financial guidance.

Investor Process Underway

The investor process is described as well advanced. ADS-TEC Energy plans to sell a majority stake in the project company while remaining a long-term partner in the project.

European Partners and Proprietary Technology

ADS-TEC Energy has developed the project with European partners. Renowned German companies and leading corporations are ready to supply batteries, electrical switchgear, transformers, and extra-high-voltage equipment.

The batteries will run on ADS-TEC Energy's proprietary battery management systems, whose electronics and software the company has developed and deployed in-house for more than 15 years.

The company states this reduces reliance on battery management suppliers, which are typically based in Asia, and supports local control over software, IT security, and associated data.

CEO and founder Thomas Speidel framed the project in broader strategic terms. "A project of this size requires staying power. I am proud that we can build in Markgröningen, and above all of our team, which has spent years preparing this project. Energy is the foundation for everything we produce in Europe. Anyone who does not control the infrastructure for it gives up part of their ability to act," Speidel said.

He added that with its own technology and renowned European partners, the company is demonstrating that Europe can plan, build and operate critical energy infrastructure on this scale on its own.

Speidel credited the local landowners, the local community, the public authorities, and the state government, as well as the company's cooperation with the grid operator, for the fact that a storage power plant of this size and relevance can be built in Baden-Württemberg.

Grid Stability and Flexibility for Baden-Württemberg

The facility is expected to deliver grid stability, resilience, and flexibility for Baden-Württemberg and beyond. According to the company, battery storage power plants do not generate electricity; they make it available when it is needed.

The facility will absorb power when generation exceeds demand, for example at midday when solar output peaks or during periods of strong wind, and release it within fractions of a second when supply tightens.

In day-to-day operation, the plant will typically run at partial load and adapt dynamically to grid requirements. It will also stabilize grid frequency, absorb load peaks, and support grid restoration after a power outage.

The company describes the current challenge this way: today, surplus wind and solar power often has to be curtailed or exported at negative prices, only for supply to fall short a few hours later, when other power plants must step in.

The storage system will shift this surplus into the hours when it is needed most. The result, according to ADS-TEC Energy, is less strain on the grid, fewer interventions by grid operators, and a more robust and affordable power supply in Baden-Württemberg.

Policy Context and Public Interest

The company describes the project as a flagship from the region, for the region, and far beyond. It states that large-scale battery storage systems are in the overriding public interest and support the implementation of the German federal government's electricity storage strategy.

The announcement also points to rising demand for flexibility as wind and solar generation expands, positioning storage as the backbone of a renewable grid. The project's permitting progress, targeted 2029 grid connection, and the company's planned dual role as a technology provider and continuing stakeholder frame what ADS-TEC Energy presents as a significant long-term commitment to the German and European energy storage market.

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