Swiss-headquartered global clean investments firm Capital Dynamics has bought a ready-to-build battery energy storage (BESS) project in Ireland, adding to its existing portfolio of long-duration energy storage facilities in the Irish Single Electricity Market (I-SEM).
The 170 MW / 680 MWh BESS located in Knockanure, County Kerry, has secured a grid connection at the nearby 110 kV Knockanure substation. Work has already started on procurement and delivery planning for the project which got the green light from planning authorities in Oct. 2025.
The four-hour duration system is classified by Ireland’s grid operator EirGrid as long duration and it is one of the first to be delivered in that category in the Republic of Ireland. The government has made long duration energy storage (LDES) a key component of its future energy security and grid buildout plans. LDES strategically sited near substations and existing wind and solar plants around the country will absorb and store excess renewable generation for release back onto the national electricity grid during times of peak demand.
“The Republic of Ireland represents one of the most compelling storage markets in Europe and combines a high and rising share of renewable generation with a clear policy commitment to decarbonize its grid,” said Barney Coles, senior managing director and co-head of clean energy at Capital Dynamics.
Coles added that this creates “a structural demand for BESS solutions” to offer businesses and represents a lucrative opportunity for Capital Dynamics.
The company purchased the County Kerry BESS from a group of private, unnamed shareholders. Pinsents Masons provided legal advice, Afry provided technical advice, and Mazars provided financial advice.
Globally, Capital Dynamics has $15 billion assets under management and advisement and 14 offices.
In March, the firm announced it had established a GBP 100 million ($136 million) joint venture with Northern Ireland developer Solo Renewables for a 150MW project in Islandmagee in County Antrim. The Islandmagee BESS received planning approval from Mid and East Antrim Borough Council in February 2026, just six months after submission. When it is operational, it will provide up to eight hours of storage capacity equivalent to 1,200MWh. It will be able to provide the equivalent of the daily energy used by up to 36,000 households.
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