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With 2.6 GW of connected load under development, GESI currently represents one of the largest portfolios of large-scale battery storage in Germany | This is Allianz’s second direct equity investment in battery storage projects in Germany in a very short period of time April 23, 2026 | Allianz Global Investors (AllianzGI ) announced today that it has acquired a 51% stake in the battery storage platform Green Energy Storage Initiative...

PM: AllianzGI acquires 51% stake in GESI

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Following the ground investigation in March, preparations are in full swing. The Franconian municipality of Bergrheinfeld near Schweinfurt is of central importance for the German energy infrastructure. This is because the SuedLink power line, which will transport wind energy from the north to southern Germany in future, runs to this location. GESI Giga Batteries has therefore been active in Bergrheinfeld for more than two years and is driving forward one...

Project update Bergrheinfeld (Bavaria)

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If you want to trigger more investment in Germany, you have to create reliable framework conditions. What is happening in energy policy Unfortunately, the opposite is currently the case. A commentary by GESI CEO Walter Raizner. Pullach, February 25. Four current examples show that energy policy is currently heading or threatening to head in the wrong direction. In the end, commercial and private electricity customers could be the ones who...

Comment: How politics fuels uncertainty

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Battery storage planned on an area of up to 16 hectares | GESI office opened on site Preparations are in full swing: one of the largest electricity storage facilities in Germany is to be built in the immediate vicinity of the former Grohnde nuclear power plant in Lower Saxony by 2028(see visualization above). “The company Green Energy Storage Initiative SE (GESI) plans to invest up to 700 million euros in...

Project update Emmerthal (Grohnde)

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International benchmarking: Other countries are much further ahead when it comes to electricity storage and BESS strategies. We took a look at who we can learn from. Capacity market: Create market-based incentives – as in the UK. The Federal Ministry of Economics has announced that it will establish a capacity market in 2027. It is worth taking a look at the United Kingdom, which has already established a functioning mechanism...

Thinking outside the box for the energy transition

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Large-scale battery project developer brings experienced industry manager on board | “Driving force for the management team” Pullach, November 13. A new task for former Siemens CEO Heinrich von Pierer: the Erlangen native is now advising the battery storage project developer GESI Giga Batteries. “I am delighted that we have been able to gain one of the most experienced industry managers in Germany as a driving force and dialog partner...

Heinrich von Pierer advises GESI Giga Batteries

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Following the completion of the energy transition monitoring, the German government is planning reforms. We have summarized what is important here in a position paper. The common goal of the storage industry and politicians must now be to establish large-scale batteries as part of the solution for an affordable and sustainable energy transition. This requires the creation of a reliable framework for investment. You can find out which new regulations...

Position paper: Creating planning security for battery storage systems

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The world’s fourth-largest economy now has a large-scale battery storage capacity of almost 16 gigawatts. Pullach, 11.07. 2025 | Seven years ago, California was still something of a storage desert: the cumulative large-scale battery capacity amounted to just 0.5 gigawatts in 2018. But since then, the US state, which in itself would be the fourth largest economy in the world, has made rapid progress. According to market analyses, total capacity...

California: Successful energy transition thanks to battery storage

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Our co-founder Martin Schoeller is the great-grandson of the electrical pioneer Oskar von Miller, who founded the Deutsches Museum – and was already promoting the idea of affordable electricity for everyone back then. When the Deutsches Museum in Munich opened its doors a hundred years ago in May 1925, it was mainly thanks to one man: the founder Oskar von Miller (1855 to 1934), an electrical pioneer and active promoter...

From the world’s largest storage power plant to GESI

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For a successful energy transition, we need to focus not only on quantitative but also qualitative growth targets – and expand storage capacities in order to fully exploit the potential of wind turbines. It is probably the greatest risk to the acceptance of the energy transition: Time and again, wind turbines stand still despite stiff breezes because the grid cannot absorb the energy. In such cases, operators have to throttle...

Wind power tuning with large central batteries

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Storage facts series (IV) | Critics question whether battery storage systems are useful for the grid and system. Why they are wrong. A constant frequency is of paramount importance for the stability of the electricity grid. However, with the expansion of wind and solar energy, there are strong fluctuations: On sunny and windy days, there is an abundance of electricity, which is accompanied by increasing frequency. During so-called dark doldrums,...

How large-scale batteries support the power grid

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One of Germany’s largest energy storage facilities is being built near the decommissioned Grohnde nuclear power plant. On March 1, we presented our plans to interested citizens. Pullach, March 2025: The municipality of Emmerthal near Hamelin in Lower Saxony is becoming a pioneer in the integration of renewable energies into the electricity grid: We will build a battery energy storage system (BESS) in the immediate vicinity of the decommissioned nuclear...

GESI project presented in Grohnde

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The new German government and the Federal Network Agency should pave the way for large-scale batteries instead of erecting new hurdles and making private sector initiatives more difficult. From GESI CEO Walter Raizner +++ This article was first published in the FAZ +++ The year got off to a promising start in terms of the energy transition: strong winds boosted electricity production. As a result, the price of electricity on...

The key to a successful energy transition

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Memory facts series (III) | There has been repeated talk in the media recently of a “boom” in large batteries. However, there is still a huge gap between supply and demand. “A battery tsunami is rolling in”, was the recent headline in “Der Spiegel”. A “second German energy miracle” is currently in the offing, which could make electricity cheaper than ever. Unfortunately, the subjunctive mood is more than appropriate here,...

“Battery tsunami” or micro-wave?

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Storage facts series (II) | Large-scale batteries significantly reduce GermanCO2 emissions. How high the savings actually are depends on the assumptions and calculation method. If you want to calculate the effect of large-scale battery storage systems on the climate, you have to deal intensively with technical details, make numerous assumptions and take complex interactions into account. Numerous adjustments can therefore be made to make the balance look good or bad...

How climate-friendly are storage projects?

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Large-scale battery storage planned in Bergrheinfeld near Schweinfurt – constructive exchange with interested citizens Pullach, December 17. The planned construction of a battery energy storage system (BESS) in Bergrheinfeld will make the region a pioneer in the integration of renewable energies. The project is intended to help balance out fluctuations in the electricity grid, reduce the use of fossil fuel power plants and maximize the use of solar and wind...

Public information event on new GESI project

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Storage facts series (I) | An analysis by the Fraunhofer Institute for Solar Energy Systems for GESI underlines: Storage systems are a decisive lever for an affordable energy transition. Large-scale batteries can significantly reduce electricity prices and thus make an important contribution to strengthening Germany as a business location and the competitiveness of our economy. This is shown by calculations by the Fraunhofer Institute for Solar Energy Systems, which we...

How large-scale batteries reduce the price of electricity

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We have moved and are now working under one roof with the Schoeller Ventures companies Multiloop, ReDi Pack and Smart Container Loop. Shared drive, shared location: On September 30, we opened the “House of Circularity” in Pullach together with three Schoeller Group companies. Speakers included Martin Schoeller and our COO Jens Wegmann, who explained why the demand for large batteries is growing rapidly – and why GESI is one of...

Schoeller Group opens “House of Circularity”

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GESI is hiring: Project manager for large-scale battery storage projects (m/f/d) In addition to good pay, a collegial environment and hybrid working, we offer the opportunity to contribute to the implementation of the energy transition. We urgently need additional storage capacities to exploit the potential of renewable energies – and it is precisely these capacities that we want to build up together with you. You can find more information below....

GESI is hiring!

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Storage specialists join forces to accelerate large-scale battery projects and the energy transition The planned storage facilities will reduce CO2 emissions because renewable energies will be better utilized and fewer gas and coal-fired power plants will be needed With their combined project planning, marketing and financing expertise, the partners aim to build up to eight gigawatts of storage capacity Pullach/Zurich, June 26. GESI Giga Batteries and The Mobility House founded...

GESI Giga Batteries and The Mobility House establish joint venture

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With Maximilian Fichtner and Christof Wittwer, two leading scientists are joining the new committee. Pullach, June 7. The guiding principle of “listen to the science” also applies to the energy transition. GESI Giga Batteries has therefore set up a scientific advisory board and recruited two professors for this task: Christof Wittwer heads the System Integration business unit at the Fraunhofer Institute for Solar Energy Systems ISE and is an honorary...

GESI Giga Batteries founds scientific advisory board

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The power plant strategy has increased the chance of an efficient technology mix: Gas and hydrogen for longer dark doldrums, large batteries for short-term demand. The sun and wind traditionally lack consistency, which poses a major challenge for the energy transition: To compensate for daily fluctuations, Germany needs electricity reserves for at least two hours. This corresponds to a total of 160 gigawatt hours (GWh). Some experts even estimate up...

Hydrogen and large batteries: On the road to coexistence?

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The experts at Frontier Economics are forecasting a plus in the billions – primarily due to falling emissions and lower expenditure on fossil fuels. Large batteries benefit the economy and society far more than they cost. This is the key finding of a recent study by the international economic consultancy Frontier Economics (FE) on the “Potential of large-scale battery storage in Germany”. The investment costs would be “more than compensated...

Study proves the economic benefits of large-scale batteries

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Ten large-scale battery projects planned, including at coal-fired and nuclear power plant sites Initiator Martin Schoeller wins over former DAX CEOs and board members PlannedCO2 savings: five million tons per year. Pullach, December 15. Business is driving the energy transition forward: following intensive preparations, a group of entrepreneurs and top managers founded the Green Energy Storage Initiative (GESI SE) this week. “Our goal is to accelerate the energy transition by...

Entrepreneurs and top managers found Green Energy Storage Initiative (GESI SE)

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Press review - GESI Giga Batteries

23/04/2026: AllianzGI acquires stake in large-scale battery storage operator GESI, Handelsblatt

07/01/2026: Battery storage on an area of up to 16 hectares in Emmerthal: Former Hamelin resident drives project forwardDeister- und Weser-Zeitung

21/11/2025: Who is allowed in here?WirtschaftsWoche

13/08/2025: Large-scale battery storage: The next project , Deister and Weser newspaper

06/08/2025: Urban land-use planning for large battery storage facility approved , Main-Post

06/06/2025: Green electricity is expensive to curtail – it doesn’t have to be, WirtschaftsWoche

07/03/2025: The solar flood, WirtschaftsWoche

02/03/2025: Huge investments worth millions are at stake: Emmerthal in demand as a location for energy projects, Deister and Weser newspaper

12/02/2025: How bad will the “battery tsunami” really be? WirtschaftsWoche

25/01/2025: Borna attracts battery investors – Several large storage facilities planned, Leipziger Volkszeitung

10/01/2025: The key to a successful energy transition by GESI CEO Walter Raizner, Frankfurter Allgemeine Zeitung

21/12/2024: Silent night, windless night, WirtschaftsWoche

19/12/2024: A large battery storage facility is planned in Bergrheinfeld, Mainpost

07/11/2024: From deposit box to mega store, Frankfurter Allgemeine Zeitung

22/10/2024: Will large-scale batteries advance the energy transition? WirtschaftsWoche

26/06/2024: New joint venture for the construction of large-scale storage facilities, Energy & Management

25/06/2024: The Mobility House and GESI plan to build and market eight gigawatts of battery storage capacity in Germany pv magazine

31/01/2024: Storing money in electricity storage systems, portfolio institutional

12/01/2024: Can nuclear power plants become electricity storage facilities? ZDF

02/01/2024: Heuking advises on structuring of GESI Green Energy Storage Initiative SE , Law & Politics

15/12/2023: Entrepreneurs and top managers launch Green Energy Storage Initiative, Environment Journal


Press contact:

presse@gesi-deutschland.de