Investing in
Clean Energy for
a Sustainable Future
Strioga Family Foundation is a mission-driven platform accelerating the energy transition by deploying capital, insight, and hands-on operating experience.
Mission of the Foundation
Founder's Vision
What we do
Minority equity for project financing
We provide minority equity investments for development and construction of renewableenergy, battery energy storage (BESS) and circular-economy projects. Typical commitments range from EUR 5 million to EUR 25 million.
Minority equity for co-development
We engage with developers at an early stage - often through joint ventures - to support renewable energy platforms from origination through development, construction, and operations. Typical commitments range from EUR 5 million to EUR 25 million.
Start-up funding
We provide capital to start-ups supporting the development and scaling of energy storage technologies, hybridization and optimization software, virtual power plants and grid flexibility services, e-mobility and renewable energy development platforms. Typical ticket sizes range from EUR 0.5 million to EUR 5 million.
Junior debt
We offer tailored junior debt and mezzanine solutions to renewable energy and BESS projects approaching final investment decision (FID), complementing senior debt and sponsor equity to support timely execution.
Bridge financing
We provide bridge financing for projects and companies developing projects and technologies that mitigate climate change.
Green bonds
We invest in green bonds issued by corporates, utilities, and other entities whose use of proceeds is aligned with our mission.
Our Investments
Equity
July 2026
Collesalvetti Battery Storage (IT)
In July 2026, the Foundation entered a strategic co-investment partnership with Enfinity Global, a leading renewable energy platform, acquiring a 49.9% equity stake in a battery storage project in the province of Livorno, Tuscany. The fully authorized 150 MW project, with a 4-hour duration and 600 MWh of capacity, is the largest investment of the Foundation and is expected to reach commercial operation in 2028.
Equity
June 2026
Karppio Battery Storage (FI)
In June 2026, we partnered with Delta Capacity, a Swiss-based developer of utility-scale battery storage systems, to jointly acquire the Karppio BESS project — a 125 MW / 300 MWh ready-to-build battery storage project in Teuva, Finland. The project is expected to reach commercial operations in the second part 2027 and will provide grid flexibility to Finland's power system, supporting frequency regulation and balancing services as the country's share of wind and solar generation continues to grow.
Venture Capital
May 2026
Ember Series A+ round (UK)
In May 2026, we invested in the Series A+ round of the electric bus operator Ember. Established in 2019 as the world’s first all-electric intercity bus operator, Ember is transforming travel in the UK, with the lowest per kilometer emissions and operating costs. By making bus travel better than driving they are redefining customers expectations of public transport.
Green Bonds
May 2026
Øyfjellet Wind Investment bonds (NO)
In May 2026, we invested in 5-year bonds of Øyfjellet Wind Investment AS, the owner of Norway's largest onshore wind farm Øyfjellet Wind AS - a fully operational 400 MW asset in Nordland, generating over 1.2 TWh annually under a 15-year power purchase agreement with Alcoa, backed by a Norwegian state guarantee. Øyfjellet Wind Investment AS is ultimately owned by a long-term investment fund managed by Aquila Capital.
Equity
June 2026
Glassenbury Battery Storage (UK)
In June 2025, we invested in the augmentation of the Glassenbury A & B battery storage sites in Kent, UK—expanding their total energy capacity to 110MWh with a 2.2-hour average duration. The investment was made in partnership with Gresham House Energy Storage Fund, UK’s largest fund investing in utility-scale battery energy storage systems.
Equity
September 2025
FFNEV BESS (ES, PT, RO)
In September 2025, the Foundation investment vehicle E E energy Invest has acquired a 49% stake in FFNEV BESS, a 2.4 GW battery storage development platform spanning Spain, Portugal, and Romania, to accelerate projects to Ready-to-Build status. This partnership aligns capital with a top-tier Spanish renewables developer FF Ventures, backed by Octopus Energy partners. The platform will look for further opportunities to add new projects to the current pipeline and explore the possibility of expanding into additional markets in the future.
Bridge Financing
Summer 2025
Bridge financing for Vilnius BESS project (LT)
In summer of 2025, the Foundation provided short-term bridge financing for the firstprivate stand-alone battery project in Lithuania.
Junior Debt
Q1 2025
Long term junior debt for E energija renewables portfolio (LT)
In Q1 2025, the Foundation provided long-term junior financing for the construction ofportfolio of renewable energy projects in Lithuania combining 56 MW of wind, 14 MW ofPV and 65 MW of BESS.
Green Bonds
February 2025
InBalance grid bonds (LT and PL)
In February 2025, we invested in a 12-months bond of InBalance Grid, a start-up focused on digital grid-balancing and electric vehicle charging infrastructure. The investment supports the scale-up of flexible energy and charging solutions in the Balticsand Poland.
Green Bonds
February 2025
Muehlhan Holding bonds (DE)
In February 2026, we invested in 4-year Muehlhan bonds, supporting a company withexpansion of capabilities in wind turbine services across coating, maintenance, andindustrial access solutions. The investment reflects our conviction that the green energytransition depends on the full value chain - not only on generation assets, but also onthe service infrastructure that keeps the projects efficient, reliable, and operating overthe long term.
