- The UK added 142,536 solar installations during the first half of 2026, the strongest six-month total since 2011.
- New systems added around 706 MW, taking UK capacity to 22.8 GW across more than 2.07 million installations.
- Britain must add roughly 5 GW annually to reach the bottom of the government’s 45-47 GW target by 2030, several times the current rate.
The UK has recorded its strongest six months for new solar installations in 15 years as households responded to higher fossil fuel prices by investing in rooftop generation.
Analysis of the government’s latest deployment figures shows that 142,536 installations were added across the UK between January and June. The total was second only to the 167,316 systems installed during the second half of 2011, when generous feed-in tariffs drove an earlier construction boom.
Great Britain accounted for 140,513 of the latest additions, with the remainder installed in Northern Ireland.
The number of systems increased rapidly during the spring. June alone delivered 27,391 installations and 132 MW of capacity, making it the second-highest month on record by installation count behind March 2026.
Approximately 18,000 of June’s new systems were installed on residential buildings, adding 102 MW. Across the entire first half, domestic properties accounted for about 95,200 installations, or two thirds of the UK total.
The country had 22.8 GW of solar capacity spread across 2.076 million installations at the end of June, according to the Department for Energy Security and Net Zero.
Energy suppliers have reported a corresponding rise in consumer demand. E.ON Next said its residential installations increased 151% year on year during the first half, while Octopus Energy recorded a 54% monthly increase in solar sales during March.
“British families are tired of being held hostage by global fossil fuel prices,” said Octopus chief product officer Rebecca Dibb-Simkin.
The figures suggest that solar is increasingly being treated as protection against energy price volatility rather than a purchase motivated principally by emissions. Batteries and export tariffs can improve the financial proposition by allowing households to retain or sell more of the power they generate.
Installation numbers do not, however, provide a complete measure of progress. The UK added approximately 706 MW during the first half, of which 694 MW was in Great Britain. Domestic systems account for most installations but only around 30% of total capacity.
Large ground-mounted projects therefore remain essential to the government’s target of reaching 45-47 GW in Great Britain by 2030. The government’s Solar Roadmap says the total could eventually exceed that range if additional rooftop projects use available distribution network capacity.
Great Britain had 22.34 GW operating at the end of June. Reaching even the bottom of the 2030 range would require another 22.7 GW, equivalent to approximately 5 GW a year over the remaining four and a half years.
By comparison, the first-half additions represent an annualised rate of around 1.4 GW. Deployment would need to accelerate to more than three and a half times that pace, although the commissioning of individual solar farms can produce large, irregular jumps in capacity.
A larger residential market should support installers, domestic battery providers, aggregators and suppliers offering smart export products. It will also increase two-way electricity flows across local networks.
