March Sees Almost 50% of Electricity Generated by Renewables with New Records for Grid Scale Solar

Why It Matters

The surge in renewable generation reduces Ireland’s reliance on fossil fuels and eases pressure on the grid, while rising solar output reshapes demand patterns, signaling a faster transition to a low‑carbon electricity system.

Key Takeaways

• Renewable generation hit 49% of Ireland’s electricity in March.
• Wind supplied 40% of the fuel mix, delivering 1,258 GWh.
• Grid‑scale solar peaked at 983 MW, near 1 GW capacity.
• Embedded rooftop solar cut afternoon demand by ~974 MW on 19 Mar.
• EirGrid sees daytime demand sometimes lower than nighttime.

Pulse Analysis

Ireland’s electricity system is rapidly greening, with EirGrid’s latest provisional figures indicating that renewables accounted for 49 % of total generation in March 2026. This near‑half share mirrors February’s 48 % and places the island among the EU’s most renewable‑heavy markets, where wind still dominates at 40 % of the fuel mix and delivered 1,258 GWh. The steady rise reflects aggressive offshore wind licensing and supportive policy frameworks that have attracted significant private capital, positioning Ireland to meet its 2030 decarbonisation targets ahead of schedule.

Solar power, though a smaller slice of the monthly mix, is punching above its weight. Grid‑scale farms reached a peak output of 983 MW on 21 March, just shy of the 1 GW milestone that could supply roughly half a million homes. More striking is the impact of embedded rooftop solar, which shaved nearly 1 GW of demand from the National Control Centre’s afternoon load on 19 March. These fluctuations force operators to fine‑tune real‑time balancing, integrating weather‑driven forecasts and storage solutions to keep the grid stable as solar penetration climbs.

The emerging pattern signals both opportunity and risk for Ireland’s energy transition. Higher solar contributions lower daytime reliance on fossil‑fuel peaker plants, cutting emissions and operating costs, while also creating new revenue streams for households with rooftop installations. However, the variability of solar output demands enhanced forecasting, demand‑response programs, and expanded battery capacity to avoid over‑generation or supply gaps. Policymakers are likely to accelerate incentives for utility‑scale solar and grid‑integration technologies, ensuring that the momentum captured in March translates into a resilient, low‑carbon grid for the decade ahead.