BW ESS and Zelos targeting RTB on 1.5GW of Germany BESS in 2025-2027

April 22, 2025
LinkedIn
Twitter
Reddit
Facebook
Email

Energy storage owner-operator BW ESS and Zelos Energy Developments have announced a 1.5GW pipeline of BESS projects in Germany, aiming for ready-to-build (RTB) status over the next two years. 

The battery energy storage system (BESS) projects are located in the federal states of Mecklenburg-Vorpommern and Sachsen-Anhalt in Northeast Germany, in the region of transmission system operator (TSO) 50Hertz. 50Hertz is one of the four main TSOs in Germany, along with Amprion, TransnetBW and TenneT. 

BW ESS and developer Zelos are aiming to have the projects reach RTB stage between 2025 and 2027. Zelos will lead on securing land, grid and permits while BW ESS wil lead of engineering design, construction, procurement, securing revenues and project financing. 

Germany is Europe’s largest and most liquid power market, BW ESS said, something many say makes it the most attractive for BESS investment on the continent. This is because the inevitable market saturation of ancillary services, today the main part of the revenue stack, should not have as much of drastic negative effect on revenues as it did in GB. 

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

BW ESS executive director Roberto Jimenez discussed these market dynamics in an interview with Energy-Storage.news in February, describing the ancillary services opportunity today as “very lucrative,” but “tiny” when compared to the “larger and longer-term play…around arbitrage and shifting energy to the highest value hours of the day.”

Jimenez called Germany “certainly the hottest market in Europe today from a development perspective,” comparing it to Texas’ ERCOT market in terms of the depth of merchant revenue streams, while conceding that it will take “some time to build the pipeline and get all of the grid figured out.”

Bird & Bird acted as legal advisor and Arcadis acted as technical advisor to BW ESS, while legal counsel Jochen Terpitz acted as advisor to Zelos for the deal. 

BW ESS is part of the large shipping and energy conglomerate BW Group, and has quickly emerged as one of the main international BESS owner-operators today. The firm recently brought online one of the UK’s largest operational BESS projects, the 100MW/331MWh Bramley project, which its CTO Nan Jian discussed recently at an event hosted by BESS provider Sungrow (Premium access). 

In October 2024, BW ESS and its local development and optimisation partner Ingrid Capacity brought online a 211MW BESS portfolio in Sweden. Like many other international owner-operators, BW ESS is also preparing to enter the Italian market, and is also active in Australia. Its CEO, Erik Strømsø, gave an interview with Energy-Storage.news last May, where he discussed the firm’s approach to the BESS industry (Premium access).

9 June 2026
Stuttgart, Germany
Held alongside The Battery Show Europe, Energy Storage Summit provides a focused platform to understand the policies, revenue models and deployment conditions shaping Germany’s utility-scale storage boom. With contributions from TSOs, banks, developers and optimisers, the Summit explores regulation, merchant strategies, financing, grid tariffs and project delivery in a market forecast to integrate 24GW of storage by 2037.
15 September 2026
Berlin, Germany
Launching September 2026 in Berlin, Energy Storage Summit Germany is a new standalone event dedicated to Germany’s energy storage market. Bringing together investors, developers, policymakers, TSOs, manufacturers and optimisation specialists, the Summit explores the regulatory shifts, revenue models, financing strategies and technology innovations shaping large-scale deployment. With Germany targeting 80% renewables by 2030, it offers a focused platform to connect with the decision-makers driving the Energiewende and the future of utility-scale storage.
2 December 2026
Italy
Battery Asset Management Summit Europe is the annual meeting for owners, operators, investors, and optimisation specialists working with operational BESS assets across the continent. The Summit focuses on how to maximise performance and revenue, manage degradation, integrate advanced optimisation software, navigate evolving market and regulatory frameworks, and plan for repowering or end-of-life strategies. With insights from Europe’s most active storage markets, it equips attendees with practical guidance to run resilient, profitable battery portfolios as the sector scales.

Read Next

February 26, 2026
Energy Storage Summit 2026 finished yesterday, having brought the industry together for its first major meeting of the year.
February 26, 2026
Trina Storage, the BESS arm of Trinasolar, has made a commitment to invest in Gore Street Capital’s new EU-focused private BESS fund.
February 25, 2026
Germany’s energy storage market growth will be hampered by a regulatory decision to potentially charge utility-scale project operators fees for use of the grid, Energy-Storage.news has heard.
February 25, 2026
Now in its 11th year and a firm fixture on the industry calendar, the Energy Storage Summit 2026 opened yesterday in London, UK.  
February 24, 2026
Fluctuating power prices in Europe present opportunities for BESS developers, according to speakers at the 2026 Energy Storage Summit.