DNV Supports Major Battery Storage Transaction in Germany as TotalEnergies Sells Stake to Allianz Global Investors

DNV Supports Major Battery Storage Transaction in Germany as TotalEnergies Sells Stake to Allianz Global Investors

(IN BRIEF) DNV acted as technical advisor to TotalEnergies in the sale of a 50 percent stake in a large battery storage portfolio in Germany to Allianz Global Investors, in a deal valued at approximately EUR 500 million. The portfolio consists of 11 projects with a total capacity of 789 MW / 1628 MWh, expected to be operational by 2028. As one of the largest battery storage transactions in Germany, the deal highlights the growing role of energy storage in supporting renewable energy integration and grid stability. DNV conducted comprehensive technical due diligence across all projects, ensuring investor confidence in the assets. The joint venture between TotalEnergies and AllianzGI will support Germany’s energy transition by enhancing grid flexibility and long-term energy resilience.

(PRESS RELEASE) HAMBURG, 2-Apr-2026 — /EuropaWire/ — DNV has supported a major battery energy storage transaction in Germany by acting as technical advisor to TotalEnergies in the sale of a 50 percent stake in a large-scale storage portfolio to Allianz Global Investors. The deal, valued at approximately EUR 500 million, involves a portfolio of 11 battery storage projects currently under construction, with a combined capacity of 789 MW / 1628 MWh and expected to become operational by 2028.

This transaction stands among the largest battery storage deals in Germany, reflecting the growing importance of energy storage infrastructure in supporting the country’s energy transition. The projects are expected to play a key role in enhancing grid flexibility, facilitating the integration of renewable energy sources, and alleviating congestion within the power system.

Prajeev Rasiah emphasized the importance of independent technical advisory services in complex energy infrastructure transactions. He noted that for portfolios of this scale, investors require a high level of confidence in areas such as technology selection, construction planning, and projected revenues. DNV’s comprehensive vendor due diligence process, supported by multidisciplinary expertise, contributed to ensuring a smooth and efficient transaction.

DNV’s role encompassed a full technical due diligence review of the portfolio, including detailed assessments of each project’s design, grid connection, construction strategy, and operational performance. The portfolio includes key sites such as Weingarten, Mehringen, and Husum, each contributing significant capacity to the overall system.

Iqbal Ahmad Sarabi highlighted the complexity involved in evaluating battery storage assets, noting that successful due diligence requires a thorough understanding of how technical design, construction timelines, and contractual risk factors interact across multiple sites. The evaluation ensured both project-specific insights and consistency across the entire portfolio, providing investors with a comprehensive view of risks and expected performance.

Battery storage is increasingly critical to Germany’s long-term energy strategy. As the country moves toward significantly increasing the share of renewable energy in its electricity mix, storage systems are essential for balancing supply and demand, stabilizing the grid, and ensuring reliable energy delivery. Under the newly formed joint venture, TotalEnergies and Allianz Global Investors will jointly finance, construct, and operate the portfolio, contributing to a more resilient and decarbonized electricity system.

About DNV
DNV is an independent assurance and risk management provider, operating in more than 100 countries, with the purpose of safeguarding life, property, and the environment. Whether assessing a new ship design, qualifying technology for a floating wind farm, analyzing sensor data from a gas pipeline, or certifying a food company’s supply chain, DNV enables its customers and their stakeholders to manage technological and regulatory complexity with confidence. As a trusted voice for many of the world’s most successful organizations, we use our broad experience and deep expertise to advance safety and sustainable performance, set industry standards, and inspire and invent solutions.

In the energy industry
DNV provides assurance to the entire energy value chain through its advisory, monitoring, verification, and certification services. As the world’s leading resource of independent energy experts and technical advisors, the assurance provider helps industries and governments to navigate the many complex, interrelated transitions taking place globally and regionally, in the energy industry. DNV is committed to realizing the goals of the Paris Agreement, and supports customers to transition faster to a deeply decarbonized energy system.

Media Contact:

Neil James Slater
Head of Media Relations, Energy Systems
+442038165702
contact.energysystems@dnv.com

Penda Sall
Media Relations Advisor
contact.energysystems@dnv.com

SOURCE: DNV