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Partnering with Ørsted to deliver the Tonn Nua offshore wind farm

In partnership with Ørsted, we were provisionally awarded the rights to develop the Tonn Nua site off the coast of County Waterford by The Department of Climate, Energy and the Environment (DCEE).

Currently in an early phase of development, once completed the site will span 306 square kilometres with expected capacity output of approximately 900MW, enough energy to power almost one million homes based on the wind prevalence in the area.

Read the press release

Our Generation Portfolio

Turlough Hill

Feb 24, 2022, 10:06 AM
Title : Turlough Hill
Location : Co. Wicklow
Select a choice : Pumped
Latitude : 53.0340603
Longitude : -6.3945633

Fuel: Water 

Capacity: 292 MW 

Commissioned: 1974 


Turlough Hill, Ireland’s only pumped storage power station, is located around 60 km south of Dublin City in the Wicklow Mountains.

The station generates up to 292 MW during peak demand periods. It can go from standstill to full capacity in around 70 seconds by releasing water from the upper reservoir, allowing it to flow through four turbines into the lower reservoir. 

During periods of lower demand, we pump water back to the upper reservoir, ready to be used again. This helps flatten the ‘demand curve’ for electricity over any given 24-hour period. 

In 2004, ESB Turlough Hill became the Hydro Control Centre (HCC) for our entire hydro fleet. We recently carried out major refurbishment work in the plant to ensure we can continue operating reliably and sustainably into the future.

Click here for to view an animation on how electricity is generated in Turlough Hill. 

Developing and acquiring 1.2 GW of solar energy by 2030

Solar is increasingly central to our net zero energy ambitions. We aim to develop and acquire 1.2 GW of solar by 2030 and continue to develop our growing solar energy portfolio, partnering with others to help deliver this.

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More than 25 years of expertise of onshore wind

Since 1998, starting with our 5MW wind farm in Crockahenny in Co Donegal, we’ve built an onshore wind portfolio supplying nearly 850MW of clean energy in Ireland and the UK.

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Growing our battery storage facilities

We are at the forefront of developing battery systems, supporting the decarbonisation of Ireland's electricity system. We currently have more than 300MWs of battery storage capacity in operation in Ireland, making it one of the largest battery portfolios in Europe.

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Our hydrogen ambitions

We believe hydrogen produced from renewable electricity will play a critical role in the decarbonisation of many sectors. We plan to use our existing capabilities and future renewable growth to become a leading player in large scale renewable hydrogen production, thereby enabling renewable electricity, in the form of electrons or green modules, to meet the energy requirements of Ireland’s future zero carbon economy.

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Investing in offshore wind energy

Offshore wind is playing a major role globally in our fight against climate change and our transition to a zero carbon economy.

We have been involved in offshore wind since 2017 with a number of planned projects for Ireland and the UK.

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Our people working in generation

Meet Joe Shinkwin, Onshore Wind Project Director in our Generation and Trading business. Joe shares how the projects he works on not only deliver clean energy but also create a community benefit fund to support local initiatives. At ESB, we’re investing in renewable energy to help reach net zero emissions, and we’re proud of the people making it happen.

Our people working in generation video