Energy Company News

ADS-TEC Energy Nears Permit for a 1 GW / 4 GWh Battery Storage Project in Southern Germany

Summary not found.

German battery storage and fast-charging specialist ADS-TEC Energy said on October 28, 2026, that local permitting authorities have confirmed all application documents are complete for a 1 GW / 4 GWh battery energy storage system at the Pulverdingen substation in Markgröningen, in the southern German state of Baden-Württemberg. The building permit itself has not yet been issued. Once it is, ADS-TEC expects to finalize financing and partnership agreements for a project the Nasdaq-listed company has previously described as one of the world’s largest battery storage developments, with grid connection targeted for 2029.

From a 2 GWh Announcement to a 4 GWh Project

ADS-TEC first unveiled the project in September 2025, describing roughly 1 GW of output paired with about 2 GWh of storage at an undisclosed site in southern Germany, and saying the local city council had already approved it unanimously while the transmission system operator had given a positive assessment for an extra-high-voltage grid connection. The company later flagged a possible expansion toward 4 GWh. In its October 28 update, reported by ESS News and pv magazine, ADS-TEC confirmed both the larger 4 GWh sizing and, for the first time, the project’s specific location at the Pulverdingen substation.

What’s Confirmed, and What Still Has to Happen

According to ADS-TEC and ESS News’ reporting, local permitting authorities have verified that the application file is complete, which the company treats as a meaningful step toward approval — but the building permit has not been granted. ADS-TEC estimates total investment at several hundred million to roughly one billion euros. The company says it is in advanced talks with international infrastructure investors and European energy firms to sell a majority stake in the project company once permitting clears; ADS-TEC would retain a minority ownership position while continuing as technology provider and long-term operator, supplying its own battery management system, switchgear and transformers through unnamed European industrial partners. No financing agreement has been signed, and the 2029 grid-connection date is a target rather than a confirmed commissioning schedule.

The Economics Behind Grid-Scale Batteries

ADS-TEC says the Pulverdingen system is designed for electricity trading and grid ancillary services such as frequency balancing, rather than for a single offtaker. ESS News cited third-party market data indicating that large German battery storage systems have been earning roughly €150,000 to €250,000 per megawatt annually from a combination of wholesale trading and balancing-market revenue — a benchmark that helps explain why developers are racing to secure grid connections in Germany even before securing full financing. The project would add to a fast-growing pipeline of large German battery projects: Giga Storage’s 350 MW / 1,400 MWh Albatross project in Lower Saxony reached “Ready to Build” status on October 2 after signing a grid-connection agreement with transmission operator Amprion, while Eco Stor’s 300 MW / 718 MWh Förderstedt project closed debt financing from Banco Santander and NORD/LB earlier this year. At 1 GW / 4 GWh, Pulverdingen would be several times larger than either.

Advertisementthe daily energyAdvertise with The Daily EnergyThis space is available. Place your brand alongside our energy news and data in English, Turkish and Arabic.[email protected]View media kit

What to Watch Next

The next concrete milestone is the building permit itself, which ADS-TEC has not put a firm date on. Only after that is granted does the company plan to close the majority-stake sale and lock in financing — meaning the project’s 2029 grid-connection target, its total cost and its eventual ownership structure could all still change before construction begins.