What happens when long-term infrastructure capital meets one of Europe’s fastest-growing renewable markets? You get a deal that reshapes portfolios and signals confidence in clean energy stability. On December 17, 2025, Asterion made a decisive move by acquiring a significant stake in a diversified renewable energy portfolio in Greece from TotalEnergies, a transaction that highlights the growing appeal of regulated renewable assets in Southern Europe.

The transaction values the portfolio at approximately $597 million, with Asterion acquiring a 50% stake for nearly $299 million. This shared-ownership structure allows TotalEnergies to retain operational control while aligning with Asterion’s long-term investment strategy. By integrating the assets into its European renewable platform, Asterion strengthens its mid-market infrastructure presence with scale, diversification, and predictable cash flows. The partnership model also reflects a broader trend where global energy majors collaborate with infrastructure investors to optimize capital allocation while maintaining operational expertise.

At the heart of the deal is a 424 MW renewable portfolio comprising both solar and wind generation. With 374 MW already operational and another 50 MW under construction, the assets offer immediate revenue alongside near-term growth. Spread across Peloponnese, East Macedonia and Thrace, and Central Greece, the geographic diversification mitigates regional risk while tapping into areas with strong renewable resources. A notable asset within the portfolio is the 70 MW Xirokambi solar project in the Peloponnese, which reached commercial operation in February 2024, underscoring the maturity and readiness of the portfolio.

All projects benefit from long-term regulated fixed tariffs, providing revenue certainty that infrastructure investors prize. As these tariffs expire, TotalEnergies will manage electricity offtake and marketing, ensuring continuity and commercial optimization. This structure allows Asterion to focus on portfolio growth while relying on an experienced operator for market-facing activities. A comparable approach has proven successful across Europe, where regulated renewables paired with strong offtake strategies deliver resilient returns even amid power price volatility.

This acquisition showcases how strategic partnerships can unlock value in renewable infrastructure while supporting Europe’s energy transition. With strong assets, stable revenues, and experienced operators, the deal positions Asterion for sustained growth in the clean energy space.

Want to stay updated on the latest renewable energy deals and strategies shaping the future of power?
Explore our latest insights, project updates, and more at Enerdatics.
Don’t forget to subscribe to our newsletter for real-time updates.