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Sector guide · Updated 12 May 2026

Solar panel grants for farms & agricultural businesses

UK farms — particularly dairy, poultry, horticulture and arable with grain drying — have some of the strongest solar economics of any commercial sector. Large unshaded barn roofs, high summer electrical demand (refrigeration, milk cooling, grain drying, irrigation), and sector-specific grants from DEFRA's Farming Investment Fund combine to deliver typical post-grant paybacks of 3-5 years on a well-sized 50-200 kWp system. Welsh and Scottish farms have additional access to nation-specific grant routes through Business Wales and Scottish Rural Development Programmes.

Last reviewed 12 May 2026 2 min read By Sector guides
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Sector snapshot

Typical buyerFarm Owner / Farm Manager
Typical system size20 kWp – 500 kWp typical
Typical project value£15,000 – £400,000
Annual electricity demand30,000 – 1,200,000 kWh

Why farms & agricultural businesses are buying solar in 2026

Large barn roof spans

Modern UK farm buildings — Dutch barns, livestock buildings, grain stores — offer 800-3,000 m² of unshaded roof. Most accommodate 50-200 kWp without structural issues.

Refrigeration / milking load

Dairy farms typically consume 30-50% of electrical load on milking parlour and bulk milk tank refrigeration — strong daytime match for solar.

Grain drying season

Arable farms with on-farm grain drying have major August-October load peaks — exactly when solar generation is strong.

Diversification grants

DEFRA's Farming Investment Fund supports on-farm renewable energy as a productivity investment.

Ground-mount option

Where rooftop is constrained, ground-mount solar on marginal agricultural land (typically 1-5 acres) is increasingly common — particularly for larger systems above 250 kWp.

The primary grant stack for this sector

These are the schemes most likely to apply to a typical project in this sector. Click through for full eligibility, application process and worked examples.

Capital grant (agriculture)

Farming Investment Fund for on-farm solar PV

Amount: £25,000 – £500,000 typical FETF/FIF awards

Farming Investment Fund 2026 (FIF) — DEFRA capital grants for English farms installing on-farm solar PV. Productivity, slurry, water and equipment grants....

Tax relief

Annual Investment Allowance for business solar

Amount: Up to £1 million per year, 100% first-year deduction

AIA 2026 guide — how UK businesses claim 100% first-year tax relief on commercial solar PV up to £1m. Eligibility, calculation worked examples, group cap rules....

Income scheme

Smart Export Guarantee for businesses

Amount: 3p–15p per kWh exported (2026 fixed tariffs)

Smart Export Guarantee 2026 guide for UK businesses — best export tariffs, eligibility for 50kWp+ systems, how to register, and how to combine SEG with AIA / Fu...

Plus secondary options:

Sub-sector breakdown

Different parts of this sector have different load profiles, building types and grant eligibility.

  • Dairy farms — Highest load factor — milking + cooling 24/7. Strong self-consumption.
  • Poultry farms (broiler & layer) — Major lighting and ventilation load. Battery integration valuable.
  • Arable farms with grain drying — August-October peak matches solar perfectly.
  • Horticulture & controlled-environment growing — Lighting and HVAC load. Major Scottish and Welsh sector.
  • Sheep & beef cattle — Lower electrical load — most installations focus on barn roofs for SEG export.
  • Pig farms — Ventilation and feed prep load. Good integration with anaerobic digestion.
  • Egg producers & packing — Refrigeration + lighting; strong solar match.
  • Mixed-enterprise farms — Variable load profile; battery integration economic.
  • Soft-fruit polytunnel growers — Major irrigation and refrigeration load.
  • Equine establishments — Stable lighting and yard load — modest but consistent.

Sector case study

Case study — 240-cow dairy farm, Devon, 145kWp installed 2025.

The family-run dairy operation occupies a 320-acre holding with three principal buildings: cubicle shed (1,800 m²), parlour/dairy (400 m²), and Dutch barn used for grain and machinery storage (600 m²). Annual electricity import: 178,000 kWh — milking parlour, bulk tank cooling, slurry pumps, water heating. Operator is a partnership (father and son) — AIA route rather than Full Expensing.

System: 145 kWp split across the cubicle shed and Dutch barn roofs, plus 100 kWh battery for evening milking. Capex: £108,750. Farming Investment Fund contribution via FETF: £21,000 (combined with new bulk-tank chiller). AIA tax relief year one (45% IT rate on partnership): £39,500. Net effective cost: £48,250. Year-one savings: £41,500 electricity + £4,300 SEG. Post-tax payback: 1.2 years. The farm now consumes 70% of generation on-site and is preparing a follow-on ground-mount solar farm application for the 2027-28 RPA window.

Sector-specific watch-outs

  • Roof condition. Many farm buildings are 20-50 years old. Asbestos cement sheet roofs (common on 1960s-70s livestock buildings) need replacement before solar — typical £15,000-£50,000 added cost.
  • Three-phase connection. Many farms have only single-phase electrical supply; upgrading to three-phase for systems above 17kWp is £8,000-£30,000.
  • DNO export limits. Rural networks often have low export capacity. Connection studies typically take 8-12 weeks.
  • Listed/curtilage buildings. Some traditional barn conversions are listed or in conservation areas — Listed Building Consent and planning typical 8-week determinations.
  • AIA partnership rules. AIA on partnership-owned plant has specific apportionment rules; sole traders converting to limited companies mid-project face awkward timing.
Donovan Fawcett · Director, SEO Dons Ltd Twelve years in UK commercial solar SEO and grant advisory. Editorial policy & independence.
FAQs

Solar panel grants for farms & agricultural businesses · FAQs

How much does a 100kWp farm solar system cost?

At 2026 prices, a 100 kWp rooftop solar PV system on a UK farm costs approximately £75,000-£90,000 installed. Add £8,000-£20,000 for battery storage, £8,000-£30,000 if three-phase upgrade required, £15,000-£50,000 if asbestos cement roof replacement needed. After AIA tax relief, net cost is typically 25-35% lower.

Which DEFRA grants apply to farm solar?

The primary route is the Farming Equipment and Technology Fund (FETF) — particularly for solar combined with refrigeration, slurry handling or grain drying equipment. Larger projects use the Farming Transformation Fund. Solar must be productive (linked to a farm operation), not standalone solar farm investment.

Can I install solar on Grade 1 agricultural land?

Rooftop solar yes (no land use change). Ground-mount on agricultural land requires planning consent — Grade 1 and 2 agricultural land planning permissions are restrictive; Grade 3b and below are more straightforward. Avoid Best and Most Versatile (BMV) agricultural land.

How does solar affect Basic Payment Scheme / DRPF?

Rooftop solar has no impact on Basic Payment Scheme. Ground-mount solar on agricultural land typically means that area is reclassified as non-agricultural — losing BPS / Direct Rural Payments on that area but generating much higher solar income.

What is the SEG income for a 50kWp farm system?

A typical 50 kWp dairy or arable farm system generates ~47,500 kWh/year. With 65-75% self-consumption (high for dairy), export is around 12,000-17,000 kWh/year. At a 5p/kWh SEG rate: £600-£850 per year. At a 15p/kWh fixed tariff (best 2026 rates): £1,800-£2,550 per year.

Check if your business qualifies for these schemes

Free 60-second eligibility check tells you exactly which grants and tax reliefs apply to your business in the farms & agricultural businesses sector.

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