Renewables generated more than half of UK electricity in the first quarter of 2026, as record wind output pushed low-carbon generation higher and reduced fossil fuel generation’s share of the power mix.
The latest Energy Trends figures from the Department for Energy Security and Net Zero show renewable generation reached 43.7TWh in the first quarter, up 18% on the same period last year. Renewables accounted for 53.1% of total electricity generation, 7.4 percentage points higher than in the first quarter of 2025.
Wind was the main driver. Wind generation increased 30% to a quarterly record of 29.3TWh, reflecting higher installed capacity and stronger wind speeds after near-record lows a year earlier. Both onshore and offshore wind generation were up by 30% compared with the first quarter of 2025.
Solar was the only other renewable technology to increase output, rising 1.8% to 2.7TWh despite lower-than-average daily sun hours. DESNZ said the increase was driven by additional capacity. Renewable installed capacity reached 66GW, up 3.4GW, or 5.4%, on the first quarter of 2025.
The low-carbon share of generation rose 6.5 percentage points to 63.8%, despite a 7.1% fall in nuclear output to 8.8TWh. Fossil fuel generation fell 16% to 27TWh, equivalent to a 32.8% share. Gas accounted for almost all fossil generation, falling 16% to 26.6TWh and representing 32.3% of total generation.
Electricity demand fell 0.6% to 88.7TWh, while UK-based generation rose 1.3% to 82.3TWh as net imports declined. Electricity exports increased 45% to 4.2TWh, the highest value since 2022 and the fifth consecutive quarter of higher electricity exports.
The data also showed electricity use for road transport rose 28% to 3.1TWh as electric vehicle numbers increased. Industrial electricity consumption fell 2.9% to 19.3TWh, while domestic consumption fell 0.9% to 27.4TWh.
The figures confirm that renewable power now occupies a central position in the UK electricity system. A higher clean power share changes the operational challenge facing the grid. Generation capacity, network access, storage, interconnectors, demand flexibility, and market design all become more important as variable output accounts for a larger share of supply.
High wind generation can reduce gas demand and ease wholesale price pressure during strong output periods. It can also increase the need for flexibility when generation exceeds local network capacity or when output falls quickly. Electricity buyers face a more complex market than a straightforward transition from fossil fuels to renewables.
Corporate power procurement is already being reshaped by that complexity. Large energy users are looking at power purchase agreements, on-site generation, battery storage, demand response, and efficiency measures to manage emissions, price volatility, and supply risk. As electrification climbs the corporate risk agenda, demand from industry, transport, buildings, and data centres is increasing pressure on power systems already undergoing structural change.
Grid capacity remains one of the central constraints. New renewable generation, data centres, industrial electrification, heat pumps, electric vehicle charging, and manufacturing projects all require timely connections. A higher renewable share is commercially valuable only if the power can reach customers when and where it is needed. Constraint costs, planning delays, and connection queues can weaken the benefit of additional generation capacity.
The export figures point to a changing role for interconnectors. Strong UK wind output can support exports to neighbouring markets, while imports remain valuable during lower-output periods. Interconnectors can improve system efficiency, but they also connect UK companies more directly to European power market conditions, weather patterns, and policy decisions.
The 53.1% renewables share should be read alongside the weather and operating conditions that helped produce it. Quarter-to-quarter results can be affected by wind speeds, demand, outages, interconnector flows, and fuel prices. Strong wind in one period does not remove the need for dispatchable capacity, storage, and demand management in another. The fall in nuclear output also shows that low-carbon system resilience cannot rely on one technology.
Energy intensive sectors face a particularly difficult balance. Clean power growth supports decarbonisation, but manufacturers, logistics operators, cold chain businesses, technology infrastructure providers, and commercial property owners still need predictable prices and reliable access. Equipment choices, contract structures, flexibility arrangements, and capital investment decisions will all be shaped by the stability of the power system as much as its carbon intensity.
The rise in electricity use for road transport gives a further signal of demand growth to come. Electric vehicles, heat pumps, industrial electrification, and digital infrastructure will increase the need for power even as efficiency improves in some areas. A cleaner generation mix must therefore be matched by network investment and flexible consumption patterns that can absorb more renewable output without creating new bottlenecks.
The latest data gives the UK a stronger clean power benchmark, while also illustrating the next phase of the transition. More renewable generation changes the power system’s economics. The business opportunity sits in flexibility, storage, smart demand, grid investment, and procurement strategies that turn cleaner generation into dependable operating advantage.
You must be logged in to post a comment.