• Copenhagen Infrastructure Partners (CIP) retains management of Europe’s largest battery storage project despite divesting a 50% stake to AXA.
• The Coalburn 1 project will provide critical energy storage to balance Europe’s growing renewable energy supply.
• Long-term revenue streams secured through agreements with SSE and a 15-year capacity market deal.

Copenhagen Infrastructure Partners (CIP) announced it has sold a 50% stake in the Coalburn 1 battery energy storage system to AXA’s alternative investment arm.

Despite the sale, CIP will continue to manage the 500 MW lithium-ion project in southern Scotland through construction and into operations, which are slated to begin in early 2026. “CIP will oversee the Coalburn 1 project throughout its construction and even after commissioning,” the firm said in a statement.

The Coalburn 1 project is poised to become the largest of its kind in Europe. It is designed to address the increasing need for reliable energy storage as renewable generation—primarily wind and solar—now accounts for roughly one-third of Europe’s energy mix. “As renewable energy production increases, energy storage is becoming more critical to ensure power supply during peak hours, regardless of fluctuating wind or solar conditions,” CIP emphasized.

To secure predictable revenue streams, the project has signed a 10-year optimisation agreement with SSE, complemented by a 15-year capacity market agreement.

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Although financial details of the transaction were not disclosed, a CIP spokesperson confirmed the strategic importance of the project in Europe’s evolving energy landscape.

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