Solar Panels for Farms in Cambridgeshire

An independent guide to solar on farms in Cambridgeshire and the wider Cambridgeshire area, including Norfolk, Suffolk, Essex: what it costs, the planning rules, the grid and the funding position, from official sources.

Agricultural solar panels in Cambridgeshire

Cambridgeshire is one of the most productive farming counties in the United Kingdom, and that productivity runs on electricity. The black, peat-rich soils of the Fens around March, Wisbech, Chatteris and Whittlesey grow some of the highest-yielding arable and vegetable crops in the country — wheat, barley, sugar beet, oilseed rape, potatoes, roots and a vast acreage of field salads and brassicas. Those crops do not simply leave the field; they are washed, graded, cold-stored, packed and chilled before they reach a supermarket. Refrigeration, pack-house lighting, conveyor lines, irrigation pumps and grain drying are relentless, year-round electrical loads, and they fall hardest in exactly the daylight hours when a solar array on a large barn or grain-store roof is producing most strongly. That overlap between on-farm demand and solar generation is what makes the economics so attractive here: every unit you self-consume is a unit you are not buying from the grid at commercial day rates.

The county is served by UK Power Networks (UKPN) as the distribution network operator, the same DNO that covers the wider East of England. Cambridgeshire’s flat, open landscape — there is no National Park and no AONB across the farmed Fens, only features like Devil’s Dyke on the chalk near Newmarket — means shading is rarely an issue, and the region’s irradiance of roughly 1,050–1,100 kWh per kWp installed is among the best in Britain for a large, unshaded south-facing roof. For cost, DESNZ’s Solar PV cost data for 2025/26 put the median installed price of a 10–50 kW system at £1,262 per kW in Great Britain (including VAT where charged, excluding batteries). Payback depends on how much of the output the farm uses itself, and the array then produces near-free power for another 20-plus years. To see how that breaks down by system size, our agricultural solar panel cost guide sets out the numbers in detail.

For growers weighing a field rather than a roof, how the 1-acre numbers work.

Farm solar across Cambridgeshire by district

Cambridgeshire’s farming character changes markedly as you move across the county — from the intensive vegetable and salad operations of the northern Fens, through the arable heartland, to the mixed and livestock holdings on the higher ground. The table below shows how a typical solar specification shifts with enterprise type and roof area.

These are roof-mounted ranges on existing barns, grain stores and pack-houses. Many Fenland holdings with large packing and refrigeration loads will sit at the upper end of system size, and a number combine roof PV with battery storage to shift cheap midday generation into evening cold-store running. The northern Fen districts around Wisbech, March and Chatteris consistently support the biggest arrays in the county because their pack-houses run chilling and grading lines deep into the day — a profile that captures almost everything a south-facing roof can produce. Further south and on the higher ground around Huntingdon, St Ives and St Neots, the loads are more seasonal and the systems correspondingly smaller, though Cambridgeshire’s strong irradiance and low-shading roofscapes still work in their favour.

Grants and tax relief for Cambridgeshire farms

As an English county, Cambridgeshire falls under the English schemes, and none is open for farm solar. Round 2 of the Improving Farm Productivity (IFP) grant 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, with ground-based arrays excluded; full applications closed on 31 July 2025 and 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.

What does apply is tax relief: the 100% Annual Investment Allowance (AIA) lets a trading farm business write off the entire qualifying cost of a solar installation against taxable profits in the year of purchase — for a business paying tax, that alone recovers a large slice of the net cost. Surplus generation that you cannot self-consume can be exported under the Smart Export Guarantee (SEG), paid by licensed suppliers, which adds a modest income stream from the power your array produces beyond on-farm demand. For Cambridgeshire’s arable holdings, where the heaviest electrical demand is concentrated into the grain-drying weeks of late summer, SEG matters more than it does for a year-round packer — outside harvest, a larger share of generation is exported rather than self-consumed, so the export tariff helps underpin the return. How AIA and SEG combine depends on your own demand profile rather than a rule of thumb, and payback depends on how much of the output the farm uses itself. Our farm solar grants guide explains eligibility and the current position.

Planning and grid in Cambridgeshire

Cambridgeshire is unusually straightforward for planning. There is no National Park and no Area of Outstanding Natural Beauty across the working farmland of the Fens, so the heritage and landscape constraints that complicate solar in upland counties simply do not apply here for most rooftop schemes. Solar panels mounted on the roof of an existing agricultural building are, in the great majority of cases, permitted development under Class J (Part 14 of the GPDO 2015) — no full planning application and no capacity limit, provided the panels stand no more than 0.2 m proud of a pitched roof and at least 1 m from the roof edge, with the council’s prior approval on design and glare above 50 kW and listed buildings excluded. That makes a barn, grain-store or pack-house roof the fastest and cheapest route to generation.

Ground-mounted arrays are a different matter: anything beyond a modest footprint will need a full planning application to the relevant district authority (Fenland, East Cambridgeshire, Huntingdonshire, South Cambridgeshire or Peterborough City), and larger schemes typically require a Landscape and Visual Impact Assessment. On the higher chalk ground near Devil’s Dyke and Newmarket, landscape sensitivity is greater and ground-mount should be scoped carefully. On the grid side, UK Power Networks (UKPN) governs connection. Systems are connected under the G99 process — smaller arrays may qualify for the simpler G98 notification, while larger commercial systems need a formal G99 application and, occasionally, a network reinforcement study where the local Fenland network is already loaded. Ask the installer to handle the DNO paperwork and capacity check as part of the quote.

Typical Cambridgeshire farm solar projects

The figures below are representative enterprise-type ranges for Cambridgeshire holdings, not named installations — they show the shape of a typical project rather than a specific farm’s accounts.

• A Fenland salad and roots packer near Wisbech with cold storage and a large pack-house roof: 200–300 kWp, sized to a heavy daytime refrigeration load.
• An arable and sugar-beet farm near Ely with a grain store and drying floor: 100–150 kWp, with generation matched to harvest-season drying demand.
• A mixed arable and beef holding near Huntingdon: 60–120 kWp across barn roofs, often paired with a battery to cover early-morning and evening yard loads.
• A southern arable and contracting business near St Neots: 50–100 kWp, sized to workshop, store and office demand with surplus exported under SEG.

Every Cambridgeshire project should start with your actual half-hourly meter data and a structural survey of the roof in question, so the system is sized to how your farm really uses power, not a generic template. SolarPanelsForFarms.uk is an independent guide, not an installer: send your details through the quote form and we will reply by email.

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.