Three developments in the space of a week have underlined how quickly the German utility-scale battery storage market is scaling. Giga Storage closed €260 million in debt financing for its 350 MW/1.4 GWh Albatross battery energy storage system near Neuenkirchen in Lower Saxony, with a consortium of seven banks: ABN Amro, Hamburg Commercial Bank, ING, Rabobank, Siemens Financial Services through Siemens Bank, SMBC and Société Générale.

Amprion signs its first large-scale BESS connection agreement

Giga Storage signed a grid connection agreement with transmission system operator Amprion on 14 October for Albatross. Amprion said it was the first grid connection agreement it had signed for a large-scale battery storage project. Albatross will connect directly to the 380 kV transmission grid at the Merzen substation and will comprise 264 battery containers, 96 medium-voltage transformers and two high-voltage transformers.

Giga Storage said Albatross in Germany, Leopard in the Netherlands and Green Turtle in Belgium are collectively under construction, representing around 1.4 GW of power capacity and 5.6 GWh of storage capacity. Albatross is the company's first large-scale battery project in Germany, with commissioning previously scheduled for 2028 and a final investment decision expected in the fourth quarter of 2026. CATL will be responsible for planning, construction and maintenance.

ADS-TEC submits final permitting documents for 1 GW / 4 GWh

German battery storage and fast-charging specialist ADS-TEC Energy has submitted complete final permitting documents for a 1 GW / 4 GWh four-hour battery energy storage system at the Pulverdingen substation in Markgröningen, Baden-Württemberg. Local permitting authorities confirmed all application documents are complete, with grid connection targeted for 2029. When the project was first announced in September 2025 it was scoped at 1 GW / 2 GWh with the location undisclosed; capacity has doubled in just over a year.

Total investment is in the range of several hundred million to one billion euros. The Nasdaq-listed company is in advanced talks with international infrastructure investors and European energy firms to sell a majority stake in the project company, retaining a minority shareholding, technology provision and long-term O&M. The facility will use ADS-TEC's in-house battery management system, electrical switchgear and transformers sourced from European industrial partners.

"A project of this size requires staying power. With our own technology and renowned European partners, we are demonstrating that Europe can plan, build and operate critical energy infrastructure on this scale on its own," said CEO Thomas Speidel.

Kyon Energy commissions Alfeld

Kyon Energy has commissioned and put into operation its 137.5 MW/282 MWh Alfeld battery energy storage system in Lower Saxony, potentially the country's largest BESS to reach operation. The project sits in distribution network operator Avacon Netz's service area, with Engira also involved.

Revenue stack under scrutiny

Third-party market data cited by ADS-TEC shows large-scale BESS in Germany recently achieving annual revenues between €150,000 and €250,000 per 1 MW through wholesale trading and balancing markets. Industry expects ancillary service markets to face cannibalisation through 2029, with long-term bankability requiring a revenue stack across day-ahead, intraday and tolled revenues.

Sources: ESS News, Energy-Storage.news

This article was assisted by AI analysis. Please refer to the original source for official information.