Wiltshire Council opened applications for a new solar panel group-buying scheme on 4 October, the third such programme in the county in five years. For the 180,000 owner-occupied homes in the area, the offer is straightforward: a discounted installation price, vetted installers, and a fixed quote with no obligation.
As reported by the Gazette Series, the scheme has already registered interest from over 400 households. But the bigger story is what this tells UK homeowners about the economics of solar in 2024.
What the Wiltshire scheme offers, and why it matters
The group-buying model works by aggregating demand across a postcode area. Installers bid for the contract, and the winning company offers a bulk discount. In previous Wiltshire rounds, homeowners saved roughly £1,200 on a typical 4 kW system, bringing the installed cost to around £5,000 rather than the £6,200 average quoted by Energy Saving Trust. That is a 19% reduction, and it does not account for the 0% VAT relief on installations until March 2027.
For the average 3-bed semi using 3,500 kWh of electricity a year, a 4 kW array can cut the annual bill by about £500 at current price cap rates. That means payback in 10 years, or 8 years with the group discount. The scheme also includes a battery storage option, which adds roughly £2,000 but lifts self-consumption from 40% to 80%, shortening payback further.
EPC impact and resale value
Solar panels alone typically lift an Energy Performance Certificate from band D to band C, a two-band jump. For a home currently at EPC E, the improvement can be three bands. That matters because from 2025, landlords cannot let properties below EPC C, and mortgage lenders are increasingly offering green rates for homes rated C or above.
Nationwide Building Society data from 2023 showed that homes with solar panels sold for 2.5% more than identical properties without them. On a £300,000 house, that is £7,500, more than the installation cost. The Wiltshire scheme effectively pays for itself on day one of a sale.
Who qualifies, and who doesn’t
The scheme is open to all Wiltshire homeowners, including those with listed buildings, though planning permission may be required. Renters are excluded. The council has not published a cap on participants, but previous rounds closed within six weeks once the installer reached capacity.
The catch is that the discount only applies if enough households sign up. The scheme uses a ‘trigger point’, typically 50 to 100 installations, before the bulk price kicks in. If insufficient interest, the discount shrinks or the scheme collapses. Wiltshire has a strong track record: both previous rounds met their targets within a month.
Homeowners outside Wiltshire should not despair. Similar schemes exist in Cornwall, Suffolk, and the London boroughs of Sutton and Merton through the Solar Together programme, which uses the same group-buying model. Energy Saving Trust lists 12 active council-led solar schemes as of October 2024.
What to do next
Wiltshire residents can apply through the council’s website until 31 October. The installer will then conduct a free survey and provide a fixed quote. There is no obligation to proceed after the quote. For those outside Wiltshire, check your local council’s website or search ‘solar group-buying scheme’ plus your postcode. Applications for the current round of Solar Together in London close on 15 November.
Frequently Asked Questions
Most homes do not need planning permission under permitted development rights, provided the panels are less than 40cm from the roof slope and not on a listed building. Listed buildings and homes in conservation areas may require consent. The scheme's installers handle this as part of the survey.
A typical 4 kW system in southern England generates about 3,800 kWh per year. With a household using 3,500 kWh annually, you can save around £500 at current price cap rates, assuming 40% self-consumption. Adding a battery raises that to about £800 per year.
