Agricultural Solar · UK Farms

Agricultural Solar PV Installation UK

MCS commercial-certified solar PV for UK farms — barn rooftops, dairy parlours, grain stores, ground-mount arrays. Systems from 30 kWp to 500 kWp+. AIA 100% tax relief, 0% VAT, 5-7 year payback. We service every farm we install, plus systems we didn't.

Why farm solar pays

Why UK farms are installing solar in 2026

UK farming electricity costs have risen 40-60% since 2022 with no return to pre-2021 levels expected. Dairy parlours, grain dryers, cold stores, and irrigation pumps are all high-demand loads — and most farms are paying 28-36 p/kWh on standard commercial tariffs.

Solar PV on the existing barn roof generates electricity at an effective long-term cost of 4-6 p/kWh. The maths is decisive: a 50 kWp dairy parlour system in 2026 typically delivers £8,000-£12,000/year of energy savings plus £400-£800/year in SEG export earnings, against a £35,000-£42,000 install cost. After claiming 100% AIA tax relief in year 1 (£8,750 corporation tax saved at 25%), effective payback drops to 3.5-5 years.

We install commercial farm solar across the UK from our Salford depot. MCS commercial certified, RECC member, NICEIC approved. Full commercial credentials here. We design every system around the actual load profile — not just maximum roof fill — to maximise on-site self-consumption.

System sizing

Typical UK farm systems

Farm type	System size	Fitted price	Annual saving	Payback (after AIA)
Small dairy parlour (40-60 cows)	15-30 kWp	£12,000-£24,000	£2,800-£4,800/yr	3-5 years
Mid dairy / arable mixed farm	50-100 kWp	£35,000-£85,000	£8,000-£15,000/yr	4-6 years
Large dairy / grain dryer / multi-barn	100-250 kWp	£70,000-£200,000	£14,000-£32,000/yr	4-6 years
Estate farm / ground-mount array	250-500 kWp	£140,000-£300,000	£28,000-£55,000/yr	3-5 years

What we install

Farm-specific solar configurations

Barn rooftop arrays

50-300 kWp installations on steel-frame agricultural buildings. We work with cement-fibre sheeting (specialist standoff mounts avoid penetration), traditional metal cladding, and modern composite roofs. Structural roof survey included on every quote.

Permitted development to 1 MWp · most farms

Dairy parlour systems

Sized to the milking-load curve (5am-8am + 3pm-6pm peaks). Covers vacuum pumps, milk cooling, parlour wash hot water. Battery option to bridge evening milking on overcast days. Typical 80-cow herd: 30-50 kWp + 13 kWh battery.

70-85% self-consumption typical

Grain dryer + cold store

Late-summer/autumn grain drying loads (August-October) are huge — typical 50-tonne batch dryer pulls 80-150 kWh per cycle. Combined with year-round cold storage, this gives a load profile that solar can offset 40-60% of.

Aligns with harvest-season generation peak

Ground-mount on lower-grade land

250 kWp+ ground arrays on Grade 3b/4/5 agricultural land. Grazing-compatible (sheep) installations a specialism — panel mounting at 0.8m clearance allows continued lamb production beneath. Full planning application required (typical 8-12 weeks).

Continued agricultural use possible

Frequently Asked

Agricultural solar FAQs

What happened to the FETF solar grant?

No. The Farming Equipment and Technology Fund is a fixed-rate equipment fund with a published item list, and its final round closed in April 2026 — it was never a 40% capital grant for rooftop solar. In England the applicable route for farm rooftop PV is the Improving Farm Productivity grant at 25%. The "FETF 40%" figure is long-circulating incorrect copy.

Can a farm claim full expensing on solar panels?

No — and this is a common and costly error. Solar PV is special-rate expenditure, which sits outside the full-expensing regime for main-pool plant. The correct route is the Annual Investment Allowance: 100% relief in year one up to the £1m annual limit, which covers almost any farm rooftop system. Above that limit the 50% first-year allowance for special-rate expenditure applies.

Will rooftop solar increase our business rates?

No. On-site renewable generation plant is excluded from the rateable value through to 2035, so a rooftop array on a farm building does not raise your rates bill in the way other new plant can.

Should we size the system to the roof or to our usage?

To your usage. A unit you consume on the farm displaces the full delivered import price; a unit you export earns the Smart Export Guarantee rate, which is much lower. We size against the real daytime load — parlour, grain drying, refrigeration, workshop, EV charging, irrigation — so the generation lands where it is worth most.

What is agricultural solar PV?

Agricultural solar PV is photovoltaic installation specifically designed for farming operations — barn and parlour roof systems (10-200 kWp typical), ground-mounted arrays on lower-grade agricultural land, and solar carports over machinery storage. Agricultural systems are usually larger than residential (50-500 kWp+), benefit from AIA 100% tax relief in year 1, and can use surplus power to offset milk parlour, irrigation, grain drying, and feed mixing loads.

How much does agricultural solar cost in the UK?

Farm solar costs £700-£900 per kWp for systems 50-100 kWp (typical barn roof), dropping to £550-£700 per kWp for 250 kWp+ installations on multiple barns or ground-mount. A 100 kWp dairy parlour install typically £75,000-£85,000 fitted. A 500 kWp multi-barn array £275,000-£350,000. All prices include MCS commercial certification, DNO G99 application, structural roof survey, and commissioning.

What is the payback period on a farm solar system?

Farm solar payback runs 5-7 years self-funded, dropping to 3.5-5 years after claiming 100% AIA tax relief in year 1. Dairy parlours (high daytime load matching solar generation profile) achieve fastest payback. Arable farms with grain drying loads in late summer also strong. Battery storage adds 18-30% to self-consumption, especially valuable for farms with significant nighttime load (cold stores, milking robots).

Do I need planning permission for solar on my farm?

Most barn-roof solar PV falls under agricultural permitted development if under 1 MWp and meets size limits — no planning permission required. Ground-mounted systems on agricultural land typically require full planning. Solar over Grade 1 or 2 agricultural land faces tighter scrutiny. Listed barns and farms in National Parks / AONBs require pre-application advice. We handle planning for every project — free pre-app review on every quote.

Can I get a grant for agricultural solar?

Direct solar grants for working farms are limited in 2026, but the financial case is strong without them: 100% Annual Investment Allowance gives full year-1 corporation tax relief on capital cost. 0% VAT on agricultural installations until 2027. Smart Export Guarantee (SEG) pays £400-£900/year per 100 kWp. Some farms qualify for the Farming Investment Fund (FIF) — we advise on eligibility per project. PPAs available for £0 upfront install on larger arrays.

Will agricultural solar damage my barn roof?

No — a properly installed mounting system spreads the load (~15 kg/m²) and is typically lighter than snow load the roof is already designed for. We start every farm project with a structural engineer survey of purlins, sheeting and existing fixings. For older steel-frame barns (pre-1990) we may recommend purlin strengthening before install. For corrugated fibre-cement (asbestos cement) we use specialist standoff mounts that avoid penetration. Every install includes a 25-year roof workmanship guarantee.

How does agricultural solar work with dairy parlours?

Dairy parlours are the best-payback solar load on most UK farms. The morning and afternoon milking sessions (5am-8am, 3pm-6pm typical) align well with solar generation peaks April-September. Vacuum pumps, milk cooling, hot water for cleaning — all daytime loads that solar directly offsets. A typical 80-cow herd parlour using 35-50 kWh/day can self-consume 70-85% of a 30-50 kWp system. We design parlour-specific systems with PV sized to the load curve, not just roof area.

Grants and tax, stated correctly

What farm solar grants and allowances actually are in 2026

This is the part of farm solar most often got wrong in print, and getting it wrong costs real money at the tax return. Here is the position as it actually stands.

There was never a 40% FETF solar grant. The Farming Equipment and Technology Fund is a fixed-rate equipment fund with a published item list, and its final round closed in April 2026. It was never a 40% capital grant for rooftop solar, and never applied to panels. In England the route that does apply to farm rooftop PV is the Improving Farm Productivity grant, at 25%. If a supplier quotes you “FETF 40%” for panels, they are working from copy that is incorrect and still circulates — ask them to show you the scheme document.

Solar cannot claim full expensing. This one catches accountants as well as farmers. Solar PV is special-rate expenditure, which puts it outside the full-expensing regime that applies to main-pool plant. The correct route is the Annual Investment Allowance, which gives 100% relief in year one up to the £1m annual limit — comfortably covering almost any farm rooftop system. Above that limit, the 50% first-year allowance for special-rate expenditure applies. The practical effect for most farms is identical to full expensing; the label is what matters at the return, and claiming the wrong one is an error to correct rather than a relief to lose.

Business rates are not a reason to hesitate. On-site renewable generation plant sits outside the rateable value through to 2035, so a rooftop array on a farm building does not push your rates bill up the way new plant otherwise might.

Export is a smaller number than self-use. A unit you consume on the farm displaces the full delivered import price; a unit you export earns the Smart Export Guarantee rate, which is materially lower. That is why we size farm systems against the actual daytime load — parlour, grain drying, refrigeration, workshop, EV and irrigation — rather than against the roof area. A system sized to the roof looks impressive and exports its surplus at the worst available rate.

Get a free agricultural solar survey

Bespoke design for your barn, parlour, or ground-mount site. Half-hourly meter data review. Quote covers self-funded (with AIA), asset finance, and PPA options. MCS commercial certified.

Get a Quote Call 07460 473299

Where to go next

Doing both at once? solar and battery installation.
For a modular battery that expands in 5kWh steps, EcoFlow PowerOcean.
As a Tesla Certified Installer we fit Tesla Powerwall.
For sites with an O&M obligation, maintenance for commercial arrays.

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