Why Capital Dynamics Now Accounts for Almost Half of Ireland's Recorded Battery Capacity

Capital Dynamics has acquired a ready-to-build battery project at Knockanure in County Kerry, Republic of Ireland, from a group of private shareholders. The project holds 170 MW of secured grid connection capacity at the neighbouring 110kV Knockanure substation, is configured for four hours giving 680 MWh, and secured planning consent in October 2025. EirGrid classifies it as long duration energy storage. Terms were not disclosed. Pinsent Masons advised on legal, Afry on technical and Mazars on financial. It is the firm's second Irish battery acquisition of 2026, and the Irish market has recorded only four in total.

What did Capital Dynamics acquire?

Capital Dynamics acquired the Knockanure project outright at ready-to-build stage, with planning consent secured in October 2025 and procurement and delivery planning already under way. The defining asset is 170 MW of secured grid connection capacity at the adjacent 110kV substation, paired with a four-hour configuration that EirGrid classifies as long duration energy storage. Terms were not disclosed, which is universal here: Enerdatics records four Irish battery transactions since the start of 2023 and not one carries a disclosed value. For an indicative range, Enerdatics' European work puts battery developer premiums at roughly $20,000 per MW for early-stage assets, around $50,000 per MW for advanced or provisionally connected projects, and at least $80,000 per MW at ready-to-build, which on 170 MW would imply upwards of $13.6 million.

What does EirGrid mean by long duration energy storage?

EirGrid applies the long duration classification to storage capable of sustained discharge over extended periods rather than the short bursts that characterise frequency response. In the Irish context four hours qualifies, which is a lower threshold than some markets apply, because the problem the Irish system needs solved is different. Ireland runs one of the highest renewable shares of any synchronous system and is experiencing rising curtailment, meaning wind output is being discarded when generation exceeds demand and the network cannot absorb it. A four-hour asset can absorb that surplus and return it across an evening peak, which addresses curtailment directly. Shorter-duration batteries stabilise frequency but cannot shift meaningful volumes of energy between periods, which is why the classification matters commercially as well as technically.

Why does Ireland need this, and why now?

Because curtailment is the cost of the renewable build-out and it is rising. The Republic of Ireland sits inside the Single Electricity Market covering the whole island, is weakly interconnected relative to continental systems, and depends heavily on wind whose output correlates poorly with demand. Every megawatt hour curtailed is generation that was built, financed and then discarded, and storage is the only domestic route to recovering it at scale. Barney Coles of Capital Dynamics described Ireland as one of Europe's most compelling storage markets, combining a high and rising renewable share with a clear policy commitment to decarbonise the grid. That is a fair description of structural demand, but it is worth noting how little of it has translated into recorded transactions so far.

Enerdatics' data shows just how thin the Irish battery market remains. Only four Irish battery transactions have been recorded since the start of 2023: Gore Street Energy Storage Fund taking 285 MW in construction from Low Carbon in March 2024, SSE acquiring 120 MW in development from Low Carbon in November 2024, Capital Dynamics buying 150 MW from Solo Renewables in March 2026, and now Knockanure. Every one is development or construction stage, and every one is undisclosed on value. Capital Dynamics' two purchases total 320 MW, roughly 44 percent of all Irish battery capacity Enerdatics has recorded changing hands, and it is the only buyer in the market to have transacted more than once. That is an unusual degree of concentration, and it reflects a market where structural demand is widely acknowledged but few buyers have actually committed.

What does the deal signal for Irish storage?

The deal signals that Irish storage is being assembled by a small number of committed buyers rather than contested by many, and that grid connection capacity is what defines a saleable project. Knockanure's value rests on 170 MW secured at a specific substation, not on land or equipment, and the seller was a group of private shareholders rather than a developer platform, which is the signature of an early market where individuals hold connection positions. Expect further Irish projects to reach the market at ready-to-build with connection secured, and expect the buyer field to stay concentrated until pricing becomes visible enough for others to underwrite.

The pricing opacity is itself the constraint. Four transactions, none disclosed, in a market repeatedly described as one of Europe's most attractive, leaves new entrants with no benchmark at all. A buyer already holding two Irish positions can price a third against its own experience; a first-time buyer cannot. That asymmetry tends to entrench whoever moved first, which is a reasonable description of where Capital Dynamics now sits with 44 percent of the recorded market and the only repeat presence in it.

Key takeaways

• Capital Dynamics acquired the ready-to-build 170 MW, four-hour Knockanure battery project in County Kerry from a group of private shareholders. Terms were not disclosed.
• The project holds secured grid connection capacity at the neighbouring 110kV Knockanure substation, secured planning consent in October 2025, and is classified by EirGrid as long duration energy storage.
• Enerdatics records only four Irish battery transactions since the start of 2023, all at development or construction stage and none with a disclosed value.
• Capital Dynamics' two Irish acquisitions total 320 MW, roughly 44 percent of all Irish battery capacity Enerdatics has recorded, and it is the market's only repeat buyer.
• Enerdatics puts European battery developer premiums at around $20,000 per MW early-stage, $50,000 per MW for advanced projects and at least $80,000 per MW at ready-to-build, implying upwards of $13.6 million for 170 MW.

Frequently asked questions

How much did Capital Dynamics pay for the Knockanure project?Terms were not disclosed. Enerdatics records all four Irish battery transactions since the start of 2023 as carrying no disclosed value. Applying Enerdatics' European ready-to-build developer premium of at least $80,000 per MW to 170 MW would imply upwards of $13.6 million as an indicative figure.

What is long duration energy storage in Ireland?EirGrid classifies storage capable of sustained discharge over extended periods as long duration energy storage. A four-hour asset qualifies, which addresses Ireland's rising curtailment by absorbing surplus wind generation and returning it across an evening peak, rather than providing the short frequency response that shorter-duration batteries deliver.

Why is Ireland attractive for battery storage?Ireland has one of the highest renewable shares of any synchronous power system, is weakly interconnected, and is experiencing rising curtailment as wind output exceeds what the network can absorb. Storage is the main domestic route to recovering that discarded generation, which creates structural demand for flexibility.

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