TotalEnergies and Allianz Global Investors Partner on 789 MW German Battery Storage Portfolio
As part of its continued expansion in Germany’s fast-evolving electricity market, TotalEnergies has signed a landmark agreement with Allianz Global Investors (AllianzGI) for the sale of a 50% stake in a portfolio of 11 battery energy storage projects. The portfolio represents a combined installed capacity of 789 megawatts (MW) and a total storage volume of 1,628 megawatt-hours (MWh), positioning it among the most significant battery storage developments currently underway in Germany.
The transaction marks a strategic partnership between a global integrated energy major and one of the world’s leading institutional investors. Together, the two companies will deliver approximately €500 million in investment into critical energy infrastructure across Germany. Around 70% of this capital expenditure will be financed through debt, reflecting a structured financing approach designed to optimize returns while maintaining balance sheet discipline.
This collaboration underscores the growing role of battery energy storage systems (BESS) as a cornerstone of Europe’s energy transition. As Germany accelerates its shift toward renewable energy sources, flexible storage solutions are increasingly essential to maintaining grid stability and ensuring reliable electricity supply.
Nearly 800 MW of Storage Capacity by 2028
The 11 battery storage projects are located across multiple regions in Germany and have been developed by Kyon Energy, a subsidiary of TotalEnergies specializing in large-scale energy storage solutions. All projects are expected to become fully operational by 2028, aligning with Germany’s broader renewable energy targets and grid modernization plans.
These storage assets will play a crucial role in enabling higher penetration of renewable energy into the national grid. By storing excess electricity generated from wind and solar facilities during periods of high production and releasing it during peak demand, the projects will enhance system flexibility and reduce the risk of power imbalances.
A significant portion of the projects will incorporate next-generation battery technologies supplied by Saft, another subsidiary of TotalEnergies and a global leader in advanced battery solutions. Saft’s expertise in high-performance lithium-ion battery systems ensures long operational lifespans, enhanced safety features, and optimized performance for grid-scale applications.
Despite divesting a 50% stake to AllianzGI, TotalEnergies will retain operational control of the assets. This ensures that the company continues to manage the portfolio under its integrated power strategy, leveraging its expertise in electricity trading, asset optimization, and renewable integration.
Supporting Renewable Growth and Grid Stability in Germany
Germany remains Europe’s largest electricity market and one of the most ambitious in terms of renewable energy deployment. The country has set aggressive targets to expand wind and solar capacity while phasing out coal-fired generation. However, the rapid expansion of renewables brings operational challenges, particularly grid congestion and supply intermittency.
Battery storage systems such as those developed in this portfolio provide essential flexibility services to the grid. They help mitigate congestion by absorbing surplus power during periods of oversupply and injecting electricity back into the system during shortages. This capability reduces curtailment of renewable generation and improves overall system efficiency.
By delivering nearly 800 MW of new storage capacity, TotalEnergies and AllianzGI will directly contribute to enhancing the resilience of Germany’s power infrastructure. These projects will enable smoother integration of variable renewable resources, stabilize electricity prices, and support the country’s long-term decarbonization objectives.
Moreover, battery storage facilitates participation in ancillary services markets, including frequency regulation and reserve capacity. Such services are critical to maintaining grid stability in an increasingly decentralized and renewable-heavy system.
Integrated Power Strategy in Action
For TotalEnergies, the transaction reflects its broader ambition to build an integrated electricity business that spans the full value chain—from renewable generation and flexible storage assets to trading, aggregation, and retail supply.
The company has been steadily expanding its footprint in Germany across onshore and offshore wind, solar photovoltaic projects, and battery storage. In addition to asset development, TotalEnergies is active in electricity trading and aggregation, enabling it to offer low-carbon power solutions available 24 hours a day, seven days a week.
This integrated approach—often referred to as “clean firm power”—combines renewable generation with storage and trading capabilities to deliver reliable, low-carbon electricity to industrial and commercial customers. A recent example includes a 200 MW power purchase agreement (PPA) signed with Airbus, demonstrating the company’s ability to secure long-term supply contracts with major industrial clients.
According to Stéphane Michel, President of Gas, Renewables & Power at TotalEnergies, the partnership with AllianzGI reinforces the company’s strategic momentum in Germany. By welcoming a strong institutional partner into the battery storage portfolio, TotalEnergies can optimize capital allocation while continuing to expand its clean energy operations in Europe’s largest power market.
AllianzGI’s Expanding Role in Energy Transition Investing
For Allianz Global Investors, the agreement represents its first direct equity investment in a portfolio of battery storage projects. The move signals a deepening commitment to energy transition infrastructure and diversified private markets investments.
AllianzGI has been investing in renewable energy assets for over two decades, building a portfolio that includes wind and solar farms, green hydrogen platforms, and electricity interconnectors. The addition of battery storage enhances the resilience and diversification of its infrastructure holdings.
Édouard Jozan, Head of Private Markets at AllianzGI, emphasized that strong infrastructure is fundamental to the transition toward cleaner energy systems. By partnering with TotalEnergies on these projects in Germany—one of Allianz’s home markets—the firm aims to reinforce national energy resilience while delivering long-term, stable returns for institutional clients.
Battery storage assets are increasingly viewed as attractive investments due to their revenue diversification potential. Income streams may include capacity payments, frequency response services, energy arbitrage, and long-term grid service contracts. As renewable penetration grows, demand for such flexibility solutions is expected to rise, enhancing the strategic value of large-scale storage portfolios.
Strengthening Germany’s Energy Resilience
The collaboration between TotalEnergies and AllianzGI highlights the evolving nature of Europe’s energy transition, where partnerships between energy operators and institutional capital providers are accelerating infrastructure deployment.
With 789 MW of battery storage capacity scheduled for completion by 2028, the portfolio will significantly enhance Germany’s ability to integrate renewable energy while maintaining grid reliability. The €500 million investment demonstrates the scale of capital required to modernize Europe’s power systems and underscores the confidence of private investors in energy transition infrastructure.
As Germany continues its journey toward a low-carbon future, flexible assets like battery storage will become indispensable components of the electricity landscape. Through this partnership, TotalEnergies and Allianz Global Investors are positioning themselves at the forefront of this transformation—supporting renewable growth, strengthening grid resilience, and delivering sustainable value in one of Europe’s most dynamic energy markets.
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