A south-facing roof in Dorset generates about 1,119 kWh per kWp a year on the EU's PVGIS model, modelled at Dorchester, among the highest in the UK, and every unit you use saves 26.47p at the Southern England price cap rate. A typical 4.5kWp system would make about 5,036 kWh a year.
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A south-facing 1kWp system at 35 degrees in Dorchester generates about 1,119 kWh a year, according to the EU's PVGIS model. That ranks 1 of the 20 areas we cover, which run from 850 kWh in Glasgow to 1,119 kWh in Dorset. East and west roofs still work, at roughly a fifth less.
| Roof direction (35° pitch) | Per kWp a year | June | December |
|---|---|---|---|
| South-facing | 1,119 kWh | 135 kWh | 39 kWh |
| East-facing | 874 kWh | 125 kWh | 17 kWh |
| West-facing | 884 kWh | 128 kWh | 17 kWh |
PVGIS is a modelled figure for an unshaded roof with 14% system losses, and it runs higher than the MCS method installers must use for your written estimate, which gives roughly 800 to 950 kWh per kWp for a well-oriented UK roof. Use PVGIS to compare places and the installer's MCS estimate to plan your budget. Our guides to which direction panels should face and how much electricity solar panels produce go further.
What that electricity is worth in Dorset
Every unit you use yourself saves 26.47p, the Ofgem price cap rate for direct debit customers in the Southern England region from 1 October to 31 December 2026. The Great Britain average is 26.32p. Every unit you export earns whatever your Smart Export Guarantee tariff pays, which the Energy Saving Trust puts at around 12p typically.
Take the Energy Saving Trust's typical 4.5kWp home system. On the PVGIS figure for Dorset it would generate about 5,036 kWh a year. If you used all of it, that would be worth about £1,333. If you exported all of it, about £604. Real homes sit between the two, and a battery or daytime use pushes you towards the higher figure. The Energy Saving Trust prices that typical system at around £7,600. See our solar panel cost guide and current export rates.
One of the sunniest parts of the UK
Dorset has one of the highest solar yields in the UK on PVGIS, ahead of Essex, Kent and Cornwall. A south-facing system at Dorchester produces about 135 kWh per kWp in June and 39 in December on PVGIS. More output per panel means a quicker payback for the same system.
Dorset's housing suits solar too. At the 2021 Census, 40.6% of households in Dorset Council's area lived in detached houses, against 22.9% across England, and 70.4% owned their home, 45.8% outright. Bournemouth, Christchurch and Poole is different: 26.8% of households there live in purpose-built flats. If that is you, see our guide to solar panels for flats.
The National Landscape and the Jurassic Coast
The Dorset National Landscape, formerly an Area of Outstanding Natural Beauty, covers just over 40% of the county, from Lyme Regis to Poole Harbour and inland to Blandford Forum. The coast is part of the Jurassic Coast, the Dorset and East Devon Coast World Heritage Site inscribed in 2001. Both count as article 2(3) land in England, so a flat-roof install there needs a prior approval application first, and panels cannot go on a wall facing a road.
Dorset Council's conservation area guidance lists solar panels on the ground or on walls visible from a highway among the things affected by conservation area rules. Rooftop panels on a house are usually still permitted development, but they must be sited to minimise their effect on the building's appearance. See our guides to solar panels in a conservation area and solar panels on a listed building.
Grants, loans and advice in Dorset
The Dorset Warm Homes: Local Grant, run by Dorset Council and BCP Council and delivered by Ridgewater Energy, includes solar panels, but it is fully subscribed, and new applicants join a waiting list with no guarantee of funding.
Dorset Council also works with the not-for-profit Lendology to offer homeowners fixed-rate loans of £500 to £20,000 for energy upgrades, repayable over up to 15 years with no early repayment charges; ask Lendology whether solar qualifies before you apply. Healthy Homes Dorset gives all Dorset residents free, impartial energy advice. See also solar panel grants in the UK.
How much solar Dorset has, and your network operator
The government counted 17,135 solar installations in Dorset Council's area at the end of 2025, up from 15,253, about 101 per 1,000 households, and 11,114 in Bournemouth, Christchurch and Poole, about 64 per 1,000. The UK average is about 69, and the government warns its 2025 council figures undercount. Its first regional breakdown ranked the South West second in the UK, with 17,539 installations in 2026 up to July.
Most of Dorset's network is run by SSEN, where a home system of 3.68kW or less per phase is notified on G98 Form B within 28 days of commissioning. Some homes in the west of the county may be on National Grid Electricity Distribution instead, and your installer will confirm which. See our G98 and G99 guide, and compare with solar panels in Hampshire or solar panels in Cornwall.
Getting solar quotes in Dorset
Get at least three written quotes from MCS-certified installers, each with a performance estimate for your roof and a full breakdown of what is supplied. That is the Renewable Energy Consumer Code's advice. Never pay more than 25% up front, and walk away from anyone offering a discount to sign on the day. Our guide to choosing a solar installer covers what to check.
Tell us about your home once and get quotes from MCS-certified installers covering Dorset.
Get a Solar Quote →Solar panels in Dorset: frequently asked questions
Are solar panels worth it in Dorset?
For most houses, yes. Dorset generates about 1,119 kWh per kWp a year on the PVGIS model, among the highest in the UK, and every unit you use saves 26.47p at the Southern England price cap rate for October to December 2026.
Do I need planning permission for solar panels in the Dorset National Landscape?
Usually not for panels on the roof of a house, which remain permitted development in a National Landscape. A flat-roof install needs prior approval first, panels cannot go on a wall facing a road, and listed buildings always need consent.
Is there a solar panel grant in Dorset?
The Dorset Warm Homes: Local Grant includes solar panels, but it is fully subscribed and new applicants join a waiting list. Dorset Council also offers Lendology energy upgrade loans of £500 to £20,000.
Who is the network operator for solar in Dorset?
Mostly SSEN, where a home system of 3.68kW or less per phase is notified on G98 Form B within 28 days. Some homes in the west may be on National Grid Electricity Distribution.
Sources for this page
Local sources checked on 10 October 2026. Solar yields: PVGIS 5.2, EU Joint Research Centre, modelled 10 October 2026. Electricity prices: Ofgem price cap by region. System cost and export rate: Energy Saving Trust. Local sources:
- Dorset Warm Homes (Warm Homes: Local Grant)
- Dorset Council: Lendology loans
- Dorset National Landscape: map
- Jurassic Coast World Heritage Site
- Dorset Council: conservation area guidance leaflet
- Nomis: Census 2021 accommodation type (TS044)
- DESNZ: Renewable electricity by local authority, 2014 to 2025
- DESNZ: first regional solar breakdown, 27 August 2026
- SSEN: micro-generation installations up to 3.68kW per phase