Solar Panel Cost in Hampshire

The solar panel cost in Hampshire is built from the same parts as anywhere else, but the inputs here pull in different directions: the detached houses that make up two-fifths of Hart and East Hampshire, the semis and flats of Farnborough and Aldershot, the expansion-era estates of Basingstoke, the Article 4 streets in Basingstoke’s Victorian and Edwardian centre, the South Downs National Park around Petersfield, and an SSEN network that has been re-cabled around Fleet and Alton. Each figure below has a dated, named source.

Our Hampshire enquiries come from in and around Basingstoke, Fleet, Farnborough, Aldershot, Alton and Petersfield: four council areas, each with its own planning picture. The number for your house is never on this page; it follows a survey of the roof, the supply and when you use power. The kit we fit, and the county overview, are on our solar panels in Hampshire page.

On the settings we use across this site (4 kWp, 35° tilt, due south, 14% system losses, building-mounted, PVGIS-SARAH3, 2005–2023), PVGIS gives Basingstoke about 4,023 kWh a year, around 1,006 kWh per kWp, with a year-to-year swing of about ±156 kWh. The Met Office station at Odiham, about seven miles east of the town, averaged 1,705 hours of sunshine a year over 1991–2020. Running the same calculation at all six of our Hampshire town points gives about 3,970 kWh in Aldershot up to about 4,128 kWh in Petersfield, a difference of about 158 kWh, or 4.0% (our arithmetic). The southernmost point, inside the South Downs National Park, comes out highest. That gap is real, but roof direction and shading still move the answer more than the town does.

Ofgem’s Typical Domestic Consumption Value from 1 July 2026 is 2,500 kWh a year, so that Basingstoke roof makes about 1.6 times what a medium household uses (our arithmetic: 4,023 ÷ 2,500). The catch is timing. PVGIS puts the same roof at about 488 kWh in June, 487 kWh in July and 136 kWh in December, so December makes about 28% of July’s output (our arithmetic). A Chineham or Hatch Warren house that is empty on weekdays exports much of a summer afternoon’s generation unless an appliance runs on a timer or a battery stores it.

What the exported share earns is set by your supplier under the Smart Export Guarantee: rates are set by each supplier and must be above zero — they change on short notice, which is why we never print one. The bigger lever in a Basingstoke house is the share of those 4,023 kWh used on site, since each one replaces a unit bought from the grid. A £ saving would mean guessing that share, so the survey asks instead who is home in the day, whether an electric car is charged on the drive and when the washing goes on. Our guide to how much solar panels can save shows how the sum is built.

Method: PVGIS 5.3 (European Commission Joint Research Centre), Basingstoke run 14 October 2026; monthly figures and the six town points from PVGIS-SARAH3 satellite record 2005-2023; runs made 2026-10-15 · Met Office — Odiham location-specific long-term averages, 1991–2020 · Ofgem — Typical Domestic Consumption Values · Ofgem — Smart Export Guarantee.

Two houses a mile apart in Fleet, Farnborough or Basingstoke can be quoted differently for the same panels. This is what changes between them:

• The house, the roof and the scaffold. At the 2021 Census, 42.5% of Hart’s 39,966 households and 41.8% of East Hampshire’s lived in detached houses, against 30.3% in Basingstoke and Deane and 16.5% in Rushmoor. Rushmoor’s commonest home is the semi (32.1%) and almost a quarter of its households (23.2%) live in purpose-built flats, which rarely come with a roof of their own; Basingstoke and Deane has the largest terraced share of the four (27.1%). Houses are 86.3% of households in Hart and 72.1% in Rushmoor (our arithmetic). A detached roof can carry more than the Trust’s twelve panels and usually needs more scaffold; a mid-terrace may take fewer.
• Insulation alongside the panels. The ONS median EPC score for a detached house is 68 in Basingstoke and Deane, East Hampshire and Hart and 66 in Rushmoor, all band D, and homes built before 1929 score between 56 and 61 across the four districts. Panels cut the electricity you buy; in an older detached house a good quote also says where heat is being lost.
• The inverter and the grid. A system up to 16 A per phase (3.68 kW) is notified under G98; anything larger needs a G99 approval before work starts, and a 4 kW inverter, at 17.39 A, is just over that line. All 6 of our Hampshire town centres sit in SSEN’s Southern Electric Power Distribution area, with Farnborough’s about 3.4 km from UK Power Networks’ boundary. SSEN has been reinforcing the local network for more low-carbon technology: a £5.2 million cable upgrade around Fleet and Church Crookham from January 2024, and a £10.6 million Alton-to-Bordon project that ran from May 2023 to September 2024.
• Planning, where it applies. Basingstoke and Deane has more than 40 conservation areas, the most of any Hampshire district, and the council says its Article 4 directions in the Basingstoke Town Centre, Fairfields, South View and Brookvale West conservation areas bring the installation of any solar panels, including on the roof, under planning permission, generally where the work can be seen from the street. Hart’s technical advice note says the Article 4 directions in its conservation areas do not remove permitted development rights for solar. Elsewhere, roof slopes in conservation areas keep their rights under the order as amended from 27 August 2026, a flat-roof array there or in the South Downs National Park around Petersfield needs a prior-approval determination first, and a listed house needs consent wherever it is. See planning permission for solar panels in Hampshire.

Whichever installer you ask in Hampshire, look them up before you sign. HCE appears on the NAPIT register as member 73495, holds MCS certification for solar PV and battery storage through NAPIT, and is a HIES Consumer Code member (HCE/A/1392). An itemised quote lets you check each line; our guide to what is in a solar quote, line by line lists what belongs on one.

Sources: ONS Census 2021 TS044 (Nomis), Rushmoor, Hart, Basingstoke and Deane, East Hampshire · ONS — Median energy efficiency score, March 2025 edition (tables 2b and 2c) · Energy Networks Association EREC G98 Issue 2 · NESO — GB DNO licence-area boundaries · SSEN news, 9 January 2024 · Alton Town Council — Alton to Bordon Network Investment Project · Basingstoke and Deane — Conservation areas and Article 4 advice (read 19 October 2026) · Hart District Council — solar technical advice note (January 2025) · GPDO 2015 Schedule 2 Part 14.