Ireland’s electricity system is facing significant pressure over the next three years, according to a new 10-year development report published on February 26 by EirGrid.
The report warns that between 2026 and 2028, electricity supply margins will remain tight, raising concerns about the ability to consistently meet peak demand.
Why is the system under strain?
1. Rapid growth in data centres
Ireland hosts major data centres operated by global technology firms. These facilities now account for more than 22% of national electricity consumption, placing sustained pressure on the grid.
2. Rising electricity demand
The shift towards electric vehicles and home heat pumps, aimed at reducing carbon emissions, has significantly increased peak electricity demand.
3. Closure of older power plants
Several ageing coal and gas plants are being retired for environmental reasons, while replacement generation capacity is not yet fully operational.
What do system alerts mean?
EirGrid may issue:
- Amber (System) Alerts: Large energy users are asked to reduce consumption.
- Red Alerts: Controlled, temporary disconnections in certain areas may be required to protect the grid.
Officials stress that alerts do not automatically mean blackouts but indicate tight operating conditions.
Emergency and backup measures
To strengthen resilience, temporary emergency generation (TEG) units have been installed in North Wall and Shannonbridge. The coal-fired Moneypoint Power Station will remain available as a backup until 2029, operating on heavy fuel oil instead of coal.
Long-term energy transition
Ireland aims to generate 80% of its electricity from renewable sources by 2030. Wind power already supplies up to 75% of electricity at times — among the highest shares in Europe.
Projects such as the Greenlink Interconnector will strengthen links with Britain and improve energy security through cross-border supply.
EirGrid said the coming years represent a period of transition as Ireland shifts toward a cleaner energy system while managing growing demand. Authorities are encouraging households and businesses to reduce unnecessary electricity use, particularly during peak periods.