By 2030, Britain’s data centres could consume as much electricity each year as almost nine million homes – around 8% of the country’s total electricity supply. New analysis by Solar4Good shows that five and a half million domestic solar installations could meet that demand in full.
Matching growing AI demand with solar power
NESO’s Clean Power 2030 report forecasts that electricity demand from British data centres will more than quadruple, from roughly 5 TWh (terawatt-hours) today to 22 TWh a year by the end of the decade.¹ Set against Ofgem’s July 2026 figure for typical household consumption – around 2,500 kWh a year² – that is the annual usage of some 8.8 million UK homes.
Installation firm Solar4Good® UK Ltd proves how residential rooftop solar panels could help plug the coming energy deficit. Records from the Microgeneration Certification Scheme (MCS) show the average solar array size of new installations in British homes in 2026 is 4.7 kW,³ roughly equivalent to 11 solar panels. An installation of this size is capable of producing around 4,000 kWh (kilowatt-hours) of electricity a year. On that basis, 5.5 million new domestic installations could match the sector’s entire projected draw.
Panels up in weeks, not decades
“Rooftop solar is the only source that can scale in months, not decades,” says Manan Shah, co-founder of Solar4Good, Britain’s best-rated major solar installer. “From enquiry to installation takes between six to 12 weeks. Households can export to the grid, and start saving money, from day one.”
That timetable leaves energy alternatives in the shade. Wind farms can take a decade from inception to completion. Nuclear power stations take even longer to commission and build.
The solar industry is already scaling at pace. In 2025 – a record-breaking year – MCS logged more than 267,000 newly certified rooftop systems.⁴ Keeping up with the data centre revolution would call for just over one million new installations annually. “That’s a large but not impossible figure,” says Shah, “because numbers have grown exponentially since 2020, when MCS recorded just 36,000 installations.”
Installing solar panels on British domestic rooftops has a positive effect for individual households too, says Shah. “Householders can drastically reduce their own energy bills, which rose by 13% with the July price cap and will rise another 4% with the October price cap.”
Data centres can supply only limited rooftop solar
One obvious response is to put panels on the data centres themselves. Government plans forecast that the UK will need at least 6 GW of AI-capable data centre capacity by 2030.⁵ Facilities on that scale could offer roughly 24–48 million square feet of roofspace – somewhere between 310 and 640 football pitches.
“You could reasonably install 200 to 350 MWp across that space,” says Shah. “That’s a serious solar portfolio by UK standards, yet it would still offset only around 1% of the increase in demand.”
Where on-site generation does punch above its weight is locally, in the very places where the industry clusters. In 2024, data centres in Slough consumed approximately 1.3 TWh,⁶ accounting for 65% of all electricity drawn from the grid in the local authority. “The added bonus for data centre operators is that the power never has to travel to the national grid and back, which saves a great deal of money,” says Shah.
More power needed in the pipeline
The scale of the challenge reflects how these facilities work. AI queries run on thousands of high-powered processors, around the clock and at full capacity. These specialised servers give off far more heat than conventional computers. According to the International Energy Agency, cooling alone accounts for anywhere from about 7% of total consumption at efficient hyperscale sites to more than 30% at less efficient enterprise ones.⁷
Meanwhile, connection requests keep multiplying. In July 2026, Ofgem said that applications to draw power from the grid had surged from 41 GW to 125 GW in under a year, with data centre projects making up at least 80 GW of the queue.⁸ For context, Great Britain’s peak electricity demand – set on 11 February 2026 – stood at about 45 GW.
“Artificial intelligence and data centres may be invisible to most people, but their appetite for energy is enormous,” says Shah.
Whether on household rooftops or industrial spaces, solar can ease that pressure and strengthen network resilience faster than any other energy source. “However small the British home installation, solar panels will be needed to cope with unprecedented data centre demand,” adds Shah.
