The UK is now fitting a solar array every three minutes. That is the pace since the Iran conflict escalated in April 2024, as reported by The Times. The figure comes from MCS-certified installations, which cover the vast majority of domestic systems. It is a 60% jump on the same period last year.
What is driving the surge
Three factors are at play. First, electricity prices remain above 24p/kWh under the October price cap, making self-generation more valuable. Second, the Iran conflict pushed wholesale gas prices back above 80p/therm in April, reigniting fears of bill volatility. Third, the Smart Export Guarantee now pays households 5–15p/kWh for power they send to the grid, a guaranteed income stream that did not exist five years ago.
But the biggest driver may be simpler: certainty. Households that installed solar in 2022 watched their neighbours pay £1,200 more for electricity over two years. The message has spread.
What it costs a typical 3-bed semi
A standard 3.5 kWp system, enough for a semi-detached home with three bedrooms, costs between £5,000 and £7,000 installed, including VAT at 0% under the current relief. That system will generate roughly 3,000 kWh per year, covering about 40% of a typical household’s annual electricity demand.
The Energy Saving Trust estimates a well-oriented south-facing roof will save a household between £500 and £700 annually on electricity bills. Add export payments of around £100–£200 a year, and the payback period falls to 8–12 years. With panels warrantied for 25 years, the net gain over that period is substantial.
EPC impact and resale value
Solar panels add between 2 and 6 points to an EPC rating, depending on roof orientation and shading. That can lift a D-rated property to a C, or a C to a B. Given that lenders increasingly offer green mortgages, some with rates 0.25% lower for EPC C and above, the financial benefit extends beyond energy bills.
Estate agents report that homes with solar sell 5–10% faster than those without, and at a slight premium. The catch is that not all properties are suitable. Roofs facing north or east, or those heavily shaded by trees, generate far less power. And listed buildings in conservation areas face restrictions.
Grants and installer availability
The Boiler Upgrade Scheme does not cover solar panels, it is limited to heat pumps and biomass. But the Great British Insulation Scheme and local authority ECO4 programmes can fund solar if combined with insulation upgrades. Households on means-tested benefits may qualify for free or heavily subsidised panels through ECO4.
Demand is outstripping supply. MCS-accredited installers report lead times of 8–12 weeks in most regions, longer in the South East. Homeowners should check the MCS website and get at least three quotes. Beware of companies promising ‘free solar’ tied to lease agreements, those often lock you into unfavourable export terms.
What you should do now
If your roof faces south, south-west or south-east and is unshaded, book a survey now. Installations completed before March 2025 will still qualify for 0% VAT. Check your eligibility for ECO4 via your local council. And ask your installer about battery storage, adding a 5 kWh battery adds £2,000–£3,000 but can double self-consumption of your solar power, cutting bills further.
Frequently Asked Questions
A standard 3.5 kWp system for a 3-bed semi-detached home costs between £5,000 and £7,000 installed, including VAT at 0% under current relief. This system typically generates around 3,000 kWh per year, covering about 40% of a typical household's annual electricity demand.
The Energy Saving Trust estimates a well-oriented south-facing roof saves between £500 and £700 annually on electricity bills. Adding Smart Export Guarantee payments of £100–£200 a year for power sent to the grid, total savings can reach £700–£900 per year, with a payback period of 8–12 years.
The Boiler Upgrade Scheme does not cover solar panels, but the Great British Insulation Scheme and local authority ECO4 programmes can fund solar when combined with insulation upgrades. Households on means-tested benefits may qualify for free or heavily subsidised panels through ECO4.
Solar panels add between 2 and 6 points to an EPC rating, potentially lifting a D-rated property to a C or a C to a B. This can qualify you for green mortgages with rates up to 0.25% lower, and estate agents report homes with solar sell 5–10% faster at a slight premium.
MCS-accredited installers currently report lead times of 8–12 weeks in most regions, with longer waits in the South East due to high demand. It's recommended to check the MCS website, get at least three quotes, and avoid companies offering 'free solar' tied to lease agreements.
