A new investment vehicle in German energy infrastructure is taking shape for professional investors. The Institutional Infrastructure Battery Fund (IIBF) is designed as a specialised fund focusing on large-scale battery energy storage systems (BESS) across Germany. At launch, the vehicle has already secured its first two sites under purchase agreements. The concrete acquisition and project pipeline currently comprises a planned investment volume of more than EUR 300 million.
The strategic focus targets the growing importance of energy storage, which helps stabilise the transmission grid and balance volatile generation peaks from renewable sources. The fund acquires exclusively facilities that are either ready-to-build or immediately prior to commercial commissioning. Through this selection, the risks of early development and planning approval phases remain outside the fund, while the acquired assets are held in the portfolio on a long-term basis.
First transactions in Central Germany and operational structuring
The initial portfolio build-up comprises a cumulative storage capacity of 55 MWh across two contractually secured units in Central Germany:
- —Radis project (Saxony-Anhalt): capacity of 13.8 MW with a storage volume of 30 MWh, scheduled for commissioning in October 2027
- —Gößnitz project (Thuringia): capacity of 10.35 MW with a storage volume of 25 MWh, targeted commissioning in November 2027
- —Pipeline under review: two additional large-scale storage projects are currently undergoing detailed due diligence
The fund is backed by a partnership between two specialist market participants. Institutional Investment Partners (2IP) is responsible for fund structuring, underwriting and overarching investment management. As Jörg Homann, Managing Partner at 2IP, emphasises, the resilience of such infrastructure investments over a long holding period is decided above all during procurement and contract structuring. Fixed cash-flow floors and strict evaluation criteria are designed to ensure a stable earnings profile.
Revenue mechanics and technology-driven trading
Operational management and market access are handled by Second Foundation Group. The technology and energy trading service provider is responsible for commercial and technical asset management, integrating the facilities into European electricity and balancing reserve markets via its proprietary software platform. Stephan Lehrke, Head of Second Foundation Germany, notes that the economic success of large-scale storage is decisively determined by sub-second intelligent control systems and high-frequency trading strategies.
The revenue model combines long-term usage fees in the form of lease payments with contractual advance payments to cushion downside market volatility. At the same time, investors participate in additional trading gains through performance-linked components. Because returns are predominantly generated from ongoing operating income during the holding period, reliance on subsequent sales proceeds at the end of the fund term remains low.
