New MCS data has revealed a record start to the year for certified installations.
There were 210,000 installations in the UK between January and June 2026. This is up 17% on the previous highest start to a year in 2025 and equivalent to one installation every 74 seconds.
Solar panels were the biggest driver, with almost 150,000 certified installations, a 14% increase on last year’s record. MCS noted that it took nearly 15 years for solar to break its long-standing annual record and it’s now set to be broken two years running.
Battery storage installations have also risen, almost doubling the number for the same period last year with 36,000 MCS certified installations in 2026 so far. This means last year’s annual record of 40,000 installations has almost been surpassed in just six months.
MCS data showed a growing trend in combining multiple technologies in a single home. One in three installations in 2026 were either delivered onto a home that already had an MCS certified renewable or were part of an installation that combined more than one technology. For example, it is becoming increasingly popular to pair battery storage with other technologies, with 92% of battery installations so far this year going onto properties with solar panels.
Lisa Cooke, managing director at MCS, said: “More and more households are gaining confidence in the benefits of home-grown energy, and the fact that many are now investing in multiple technologies is testament to this. As energy markets continue to be influenced by global events, we’re seeing more households than ever before turn to renewables and put their trust in MCS certified businesses.
“With this rising demand, MCS’s evolving role as not just a standard setter, but also a consumer protection body, is more important than ever. We take our role seriously, and that’s why we’ve redeveloped our Scheme and set new rules under which every installer will have to operate by 31 March 2027.
“This includes a higher level of financial protection and a legally binding commitment to adhere to consumer protection law. We remain committed to raising standards across the sector to give everyone the confidence they need to make the move to home-grown energy.”
Michael Shanks, the energy minister, added: “More and more families are switching to clean energy technology to create warm, comfortable homes and help bring down their bills for good.
“These excellent figures show our focus on domestic energy that we control is absolutely right, as a typical home could save up to £550 per year by installing a heat pump, solar PV and a battery together.”
Heat pump installations, however, were 17% lower than the first half of 2025. Three quarters of heat pump installations were funded by government programmes such as the Boiler Upgrade Scheme (BUS). MCS said these findings highlight the important role these schemes play in helping households access low-carbon heating. Households with oil or LPG-heated properties can now access an increased BUS grant of £9,000 to support them to make the switch.
The new build market is also contributing to the growth in numbers, with 25% of installations in 2026 on new build properties. MCS said this is a particularly strong market for solar, as the latest available data for new homes showed an estimated 59% were fitted with MCS certified solar panels, as the sector prepares to deliver the Future Homes Standard.
Chris Hewett, chief executive of Solar Energy UK, said: “While energy costs continue to hit the headlines, it is no surprise that so many more homes are having solar panels and battery energy storage fitted. They slash bills and installations are quick and simple to complete. Moreover, every solar home helps to push gas off the grid, cutting bills for us all.”
Charlotte Lee, chief executive of Heat Pump Association UK (HPA UK), added: “It’s fantastic to see a record number of renewable installs, however it’s disappointing that MCS certified heat pump installations are not following this trend. The closure of the Energy Company Obligation and slower deployment of heat pumps through the Warm Homes: Social Housing Fund are directly impacting the domestic retrofit market and supply chain.
“Despite this, HPA UK data for H1 2026 shows that sales of space heating heat pumps have grown by 2% from H1 2025. This has been driven by deployment into new build following confirmation of the Future Homes and Buildings Standard, with installations in new build properties 23% higher in H1 2026 than H1 2025.
“To ensure the retrofit market can sustain growth, government must urgently clarify future support for low-income households and introduce the zero/low-interest consumer loans promised in the Warm Homes Plan.”