Solar Panels for Farms in Sussex

An independent guide to solar on farms in Sussex and the wider East and West Sussex area, including Surrey, Kent, Hampshire: what it costs, the planning rules, the grid and the funding position, from official sources.

Agricultural solar panels in Sussex

Sussex farming runs from the chalk downland arable belt along the South Downs to the dairy and grazing land of the Weald, and it is now the unrivalled heart of English viticulture. Sussex grows more vineyard acreage than any other county, with Nyetimber, Ridgeview and dozens of smaller estates building the reputation of English sparkling wine on the free-draining greensand and chalk soils between Chichester and the High Weald. Alongside the vines sit large glasshouse operations around Chichester and the coastal plain, mixed livestock holdings across the Weald, and the cereal and break-crop rotations of the downland farms. Every one of these enterprises shares the same problem: an electricity bill that has roughly doubled since 2021, and a daytime demand profile that solar matches almost perfectly.

That match is why farm solar pays so fast in Sussex. The county sits in one of the sunniest parts of the UK, with the coastal plain around Chichester and Bognor recording some of the highest irradiance figures in England — typically 1,050 to 1,100 kWh per kWp installed each year, well above the national average. A well-sized rooftop array on a packhouse, dairy parlour, grain store or winery covers the bulk of daytime load and exports the surplus through your distribution network operator, UK Power Networks (UKPN), who manage the grid across the whole of Sussex. For a cost benchmark, DESNZ Solar PV cost data for 2025/26 put the median installed price of a 10–50 kW system in Great Britain at £1,262 per kW, including VAT where charged and excluding batteries; payback depends on how much of the output the farm uses itself, and a system then keeps cutting bills for another two decades.

Farm solar across Sussex by district

These ranges assume rooftop mounting on existing agricultural or processing buildings and a high level of self-consumption. A glasshouse or refrigerated packhouse with year-round daytime load uses more of its own output, which shortens payback; a seasonal grain store that mostly draws power at harvest uses less and usually benefits from pairing the array with battery storage. Every system should be sized against your own half-hourly meter data rather than rules of thumb — see our full breakdown of what agricultural solar actually costs per kWp.

Grants and tax relief for Sussex farms

Sussex farms sit in England, so the relevant schemes are English ones — Welsh, Scottish and Northern Irish programmes do not apply here — and no grant for solar panels on farms is open.

• Improving Farm Productivity grant: closed. Round 2 paid up to 25% of eligible costs — for solar, £15,000 minimum to £100,000 maximum — for panels on farm-building rooftops or irrigation reservoirs only, and closed to full applications on 31 July 2025; no further round has been announced. The Farming Equipment and Technology Fund (FETF) 2026 window closed at midday on 12 May 2026, and its 2023–2026 item lists did not include solar panels to power a farm; Capital Grants 2026 and the Sustainable Farming Incentive have no solar items.
• 100% Annual Investment Allowance (AIA): commercial solar is plant and machinery, so a trading farm can write off the entire qualifying cost against taxable profit in the year of installation.
• Smart Export Guarantee (SEG): licensed suppliers must pay you for every surplus unit you export to UK Power Networks, turning summer overproduction from the long Sussex daylight into a second income stream.

With no grant open, the AIA and on-farm use of the output drive the payback maths — full detail on the current schemes is on our farm solar grants and funding page.

Planning and grid in Sussex

Sussex is unusually heavily designated. The South Downs National Park runs the length of the county, the High Weald National Landscape (AONB) covers the north and east, and Chichester Harbour AONB protects the coastal estuary. That sounds restrictive, but for most farm solar it is not. Rooftop arrays on existing agricultural buildings almost always count as permitted development under Class J (Part 14 of the GPDO 2015), even inside a National Park or AONB: no capacity limit, panels no more than 0.2 m proud of a pitched roof and at least 1 m from the roof edge, the council’s prior approval on design and glare above 50 kW, and listed buildings excluded. The vast majority of farm rooftop systems in Sussex need no planning application at all.

The picture changes for ground-mounted arrays. Inside the South Downs, the High Weald or Chichester Harbour, a field-scale ground mount will need full planning consent and a landscape and visual impact assessment, and the National Park Authority applies a high bar. Where roof space is limited, the sensible order is to maximise every available roof first, then consider a discreet ground array on lower-grade, screened land outside the most sensitive views.

On the grid side, every connection in Sussex runs through UK Power Networks (UKPN). Any commercial array above the small domestic threshold connects under the G99 process, which covers the application, the protection settings and the export agreement; it pays to check available capacity at your local substation before finalising the design, because rural feeders in the Weald and on the downs can be constrained.

Typical Sussex farm solar projects

The figures below are representative enterprise-type ranges for Sussex, not a single named site.

• Vineyard and winery, Arun valley / High Weald: presses, chillers, bottling lines and a visitor centre give a strong daytime load. A 60–150 kWp rooftop array on the winery and barn typically covers most consumption, with a clean sustainability story to put in front of wine buyers.
• Glasshouse and salad grower, Chichester coastal plain: high year-round electrical demand for irrigation, lighting and refrigeration suits 150–250 kWp installations on the coastal plain’s strong irradiance, with the panels on packhouse and store roofs rather than the glass — see solar panels for glasshouse growers.
• Wealden dairy farm, Lewes / Eastbourne hinterland: parlour, bulk milk tank cooling and a vacuum pump run a steady daytime base load. A 40–100 kWp roof array on the parlour and cubicle sheds is typical, sometimes paired with a battery.
• Downland arable holding, Horsham / South Downs: grain drying and store loads are seasonal, so an 80–200 kWp array on the grain store and machinery sheds is sized for export through UKPN under SEG outside harvest.

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SolarPanelsForFarms.SolarPanelsForFarms.uk is an independent guide, not an installer: send your details through the quote form and we will reply by email.

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For costs by system size see what agricultural solar panels cost; for funding, farm solar grants and capital allowances; for the regional picture, farm solar by UK region.