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SONI Ltd SONI is the electricity transmission system operator for Northern Ireland. We're responsible for a safe, secure supply of electricity in Northern Ireland.

We also operate the all-island wholesale electricity market through the Single Electricity Market. SONI, the Electricity Transmission System Operator for Northern Ireland, operates and develops the electricity grid. This includes interconnecting with neighbouring grids and running the wholesale electricity market. The grid brings power from generators to NIE Networks’ distribution grid that supplies every home, farm and business in Northern Ireland. SONI ensures electricity is always available at the most economic price – today, tomorrow and for decades to come. Electricity can be generated from renewable sources like wind and solar power. These sources of clean energy will soon replace dirty fuels like coal and oil. Because of this, electricity will increasingly be used for more reasons, like transport and heating. To prepare for this change, SONI is currently holding a consultation on how to make Northern Ireland’s electricity grid stronger and more flexible so that it can carry more renewable energy over the next decade. We want to hear your views. Find out more at https://consult.soni.ltd.uk/.

13/10/2026

At SONI, we're helping to shape Northern Ireland's energy future.

Today we're sharing a new chapter in our story, one that is a clearer expression of who we are, what we stand for and the role we play at the heart of Northern Ireland's electricity system.

A simple idea sits behind our story: Today's Balance, Tomorrow's Energy.

It reflects the role we play every day: balancing the needs of today's electricity system while helping to shape the energy system of tomorrow, underpinned by our commitment to serving the public good.

As Northern Ireland's energy system continues to evolve, we will continue to work alongside consumers, communities, industry and policymakers, to help shape that future together.

Thank you to everyone who came along to our recent public consultation event to hear more about the Coolkeeragh 110 kV S...
09/10/2026

Thank you to everyone who came along to our recent public consultation event to hear more about the Coolkeeragh 110 kV Substation Extension.

Once complete, the project will strengthen the electricity network in the North West.

If you were unable to attend, you can still share your views on the project through our consultation portal: https://consult.soni.ltd.uk/

Submit your feedback before 5pm on Friday 6 November 2026

We’re strengthening the electricity grid in the North West — and we want to hear from you. The Coolkeeragh 110 kV Substa...
17/09/2026

We’re strengthening the electricity grid in the North West — and we want to hear from you.

The Coolkeeragh 110 kV Substation Extension involves the upgrade and extension of the existing substation within the grounds of Coolkeeragh Power Station at Maydown, Derry~Londonderry.

Once complete, the project will strengthen the electricity network in the North West.

Come along to our drop-in event to meet the project team, learn more about the project proposals and share your views.

Strathfoyle Community Centre
📅 Wednesday 7 October
⏰ 2.00 pm–8.00 pm

SONI is Northern Ireland's electricity Transmission System Operator. As we enhance the electricity grid, we are leading the way for a more secure and sustainable energy future.

We're proud to support this important initiative with the Young Farmers' Clubs of Ulster, helping members and staff gain...
17/09/2026

We're proud to support this important initiative with the Young Farmers' Clubs of Ulster, helping members and staff gain life-saving first aid skills and confidence. 👏🚑

𝐓𝐡𝐚𝐧𝐤𝐟𝐮𝐥 𝐭𝐨 𝐒𝐎𝐍𝐈 𝐋𝐭𝐝 𝐟𝐨𝐫 𝐭𝐡𝐞𝐢𝐫 𝐜𝐨𝐧𝐭𝐢𝐧𝐮𝐞𝐝 𝐬𝐮𝐩𝐩𝐨𝐫𝐭! 👏📣

SONI Ltd have agreed to invest in our first aid training programme available to both members and staff. We are committed to ensuring our staff and members are equipped with the correct first aid training that they will be able to use both within YFCU and everyday life.

YFCU President Kristina Fleming commented, “𝘰𝘶𝘳 𝘮𝘦𝘮𝘣𝘦𝘳𝘴 𝘵𝘢𝘬𝘦 𝘱𝘢𝘳𝘵 𝘪𝘯 𝘢 𝘩𝘶𝘨𝘦 𝘳𝘢𝘯𝘨𝘦 𝘰𝘧 𝘢𝘤𝘵𝘪𝘷𝘪𝘵𝘪𝘦𝘴 𝘵𝘩𝘳𝘰𝘶𝘨𝘩𝘰𝘶𝘵 𝘵𝘩𝘦 𝘺𝘦𝘢𝘳, 𝘴𝘰 𝘦𝘯𝘴𝘶𝘳𝘪𝘯𝘨 𝘵𝘩𝘢𝘵 𝘵𝘩𝘦𝘺 𝘩𝘢𝘷𝘦 𝘵𝘩𝘦 𝘬𝘯𝘰𝘸𝘭𝘦𝘥𝘨𝘦 𝘢𝘯𝘥 𝘤𝘰𝘯𝘧𝘪𝘥𝘦𝘯𝘤𝘦 𝘵𝘰 𝘳𝘦𝘴𝘱𝘰𝘯𝘥 𝘪𝘯 𝘢𝘯 𝘦𝘮𝘦𝘳𝘨𝘦𝘯𝘤𝘺 𝘪𝘴 𝘢 𝘷𝘢𝘭𝘶𝘢𝘣𝘭𝘦 𝘪𝘯𝘷𝘦𝘴𝘵𝘮𝘦𝘯𝘵. 𝘞𝘦 𝘢𝘳𝘦 𝘨𝘳𝘢𝘵𝘦𝘧𝘶𝘭 𝘵𝘰 𝘚𝘖𝘕𝘐 𝘓𝘵𝘥 𝘧𝘰𝘳 𝘴𝘶𝘱𝘱𝘰𝘳𝘵𝘪𝘯𝘨 𝘵𝘩𝘪𝘴 𝘪𝘯𝘪𝘵𝘪𝘢𝘵𝘪𝘷𝘦 𝘢𝘯𝘥 𝘩𝘦𝘭𝘱𝘪𝘯𝘨 𝘶𝘴 𝘵𝘰 𝘱𝘳𝘰𝘷𝘪𝘥𝘦 𝘵𝘩𝘪𝘴 𝘰𝘱𝘱𝘰𝘳𝘵𝘶𝘯𝘪𝘵𝘺 𝘵𝘰 𝘰𝘶𝘳 𝘮𝘦𝘮𝘣𝘦𝘳𝘴 𝘢𝘯𝘥 𝘴𝘵𝘢𝘧𝘧”.

Pictured L-R is William Sufferin (SONI Ltd), Amy Breeze (Land Owner Relations Manager at SONI Ltd and member of Spa YFC), Victoria Minford (YFCU Vice President) and Derek Lough (YFCU CEO).

📲🔗 Read the full story; https://www.yfcu.org/post/soni-ltd-funds-vital-first-aid-training-for-yfcu

29/06/2026

In May, renewables provided 43.3% of the electricity generated in Northern Ireland ⚡

🌬️Wind remained the largest renewable source at 34.7%, with solar contributing 3.2%☀️, renewable hydro 0.1%, and other renewable sources 5.3%.

🔋Battery storage contributed 0.3%, supporting a more flexible and resilient electricity system.

23/06/2026

❤️Today, we’re proud to celebrate 𝗜𝗻𝘁𝗲𝗿𝗻𝗮𝘁𝗶𝗼𝗻𝗮𝗹 𝗪𝗼𝗺𝗲𝗻 𝗶𝗻 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗗𝗮𝘆 and recognise the incredible contribution of our female colleagues across SONI. ❤️

💡This year’s theme, Engineering Intelligence, highlights the vital role women are playing in shaping the future of our energy system. ⚡

“𝗪𝗲 𝗮𝗿𝗲 𝗰𝗲𝗹𝗲𝗯𝗿𝗮𝘁𝗶𝗻𝗴 𝘁𝗵𝗲 𝘄𝗼𝗺𝗲𝗻 𝗹𝗲𝗮𝗱𝗶𝗻𝗴 𝗮𝗻𝗱 𝗸𝗲𝗲𝗽𝗶𝗻𝗴 𝘁𝗵𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 𝘀𝗲𝗰𝘂𝗿𝗲 𝘁𝗼𝗱𝗮𝘆, 𝘄𝗵𝗶𝗹𝗲 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘁𝗵𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 𝘄𝗲 𝗻𝗲𝗲𝗱 𝘁𝗼𝗺𝗼𝗿𝗿𝗼𝘄.”

From innovation and system operations, to planning and delivery, their expertise, leadership and dedication continue to drive progress every day.

Thank you for everything you do 👏

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12 Manse Road
Belfast
BT69RT

Opening Hours

Monday 8:30am - 5:30pm
Tuesday 8:30am - 5:30pm
Wednesday 8:30am - 5:30pm
Thursday 8:30am - 5:30pm
Friday 8:30am - 5:30pm
Saturday 9am - 2pm

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