Though the concept of solar energy may seem modern, the roots of solar power stretch back centuries. As early as the 7th century BC, ancient Greeks and Romans harnessed sunlight for warmth, using simple magnifying glasses to ignite fires. Fast forward to 1839, French physicist Edmond Becquerel uncovered a world-changing phenomenon—the photovoltaic effect—when he found that some materials produced an electric current when exposed to light. This foundational discovery underpins modern solar panel technology.

The UK’s ambitious transition to clean energy – featuring massive investments in solar PV, battery storage, heat pumps, and improved household efficiency – promises to deliver long-term benefits. However, Ofgem, the national energy regulator, has sounded the alarm on a pressing issue: unless policies are carefully designed, the short-term costs of clean energy could hit the poorest households hardest.

Solar power in the UK has achieved a significant milestone by supplying more than 10% of the nation's electricity for two consecutive months—April and May 2025. This breakthrough reflects a combination of record-breaking solar generation capacity, unusually sunny weather, and strong government and industry support for solar expansion, marking a pivotal moment in the country’s clean energy transition.

The UK Solar Roadmap, published in June 2025, is a government-industry comprehensive plan designed to rapidly expand solar energy deployment across the UK, supporting the government's Clean Power 2030 Action Plan and longer-term net-zero 2050 goals. The roadmap targets increasing the solar capacity from around 18 GW today to between 45 and 47 GW by 2030—more than doubling current installations. This expansion includes both domestic and commercial rooftop solar systems as well as large ground-mounted solar farms, aiming to make solar a cornerstone of Britain’s clean energy future.

The United Kingdom is making tangible progress on its ambitious climate and energy commitments, positioning itself firmly on track to meet its 2030 clean energy objectives as well as the overarching net-zero 2050 target. As of mid-2025, renewable energy sources constitute approximately 41% of the UK’s total energy mix, a figure that has steadily climbed thanks to aggressive expansion in wind and solar capacity. Wind energy alone accounts for nearly 22%, while solar delivers just over 5% of all energy consumed. Biomass, hydroelectric, and other renewables add valuable contributions to the clean energy portfolio, painting a promising picture for Britain’s low-carbon transition.

Wind and solar power have become central to the UK’s fight against air pollution and climate change, delivering profound impacts on national emissions and energy-related pollution. As of 2025, these renewables supply more than a quarter of the country’s electricity, serving not only as a strategy for clean energy generation but also as a powerful tool to cut harmful emissions that contribute to pollution and climate risks.

Record-high public support for renewable energy in the UK has soared to an impressive 88% in 2025, according to the latest Government Public Attitudes Tracker. This remarkable statistic, which marks another consecutive year of growth, reflects the nation's overwhelming demand for clean energy sources and underscores how integral technologies like solar, wind, and tidal are to British energy independence and climate action.

The UK has reached a remarkable achievement in July 2025: more than 75% of its electricity is now sourced from renewable energy. This record-breaking shift marks a pivotal leap toward the nation’s ambitious net zero targets, demonstrating unprecedented progress in phasing out fossil fuels. The overwhelming presence of wind and solar—complemented by contributions from hydro and biomass—has revolutionised the UK’s energy mix, drastically reducing carbon emissions and enhancing grid resilience.

In 2025 so far, the UK government’s Energy Company Obligation (ECO) scheme has delivered approximately 810,700 energy efficiency measures across around 243,900 households in Great Britain. This includes installations that began from the start of ECO4 in April 2022 and carried-over measures from prior phases. Overall, since the start of ECO (all phases), around 4.2 million measures have been fitted in about 2.5 million properties. The scheme promotes measures like insulation, heating controls, and low-carbon heating systems to reduce fuel poverty and carbon emissions. In the first quarter of 2025 alone, roughly 68,100 new measures were installed, with March 2025 seeing a 26% increase in installations compared to February. Measures categorized as "Other Heating" — primarily heating controls — accounted for 50% of installations under ECO4, with loft insulation making up about 14%.