Solar panels for agriculture, FAQs
Plain answers to the questions farmers most often ask about agricultural solar. Last updated for 2026.
How much do solar panels for a farm cost in the UK?
Dairy and livestock parlour installs (30-250 kW): roughly £30,000-£240,000, ex VAT (indicative). Arable rooftop installs (50-500 kW): roughly £45,000-£450,000. The official DESNZ median (May 2026) for 10-50 kW installs is £1,204 per kW; above 50 kW there is no official series, and indicative industry guide prices run about £750-£1,050 per kW at 100 kW and £650-£900 per kW at 500 kW, ex VAT, excluding grid reinforcement, re-roofing and batteries. Utility ground-mount of 5 MW and above costs about £526-£789 per kWp excluding land (Arup for DESNZ, July 2025, 2023 prices).
What's the payback for a dairy farm solar install?
Indicative only: roughly 4-7 years if sized to the daytime load. Self-consumption depends on sizing: an array sized to the daytime load (milk cooling, parlour pumps) uses most of its output on site, while one sized to annual consumption exports much more. An Irish Teagasc model (July 2025) of a 100-cow farm with an array sized to annual use consumed 27% on site (41% with a battery). The band assumes 24-28p avoided import and 3-5p export; the 100% AIA shortens the post-tax payback.
Can solar go on asbestos cement farm roofs?
Panels should not be fixed to asbestos cement sheeting, so the roof usually needs replacing first. The most common solution is a combined re-roof + PV project where the PV business case partially funds the re-roof. CAR 2012 governs asbestos work: most asbestos-cement sheet removal is non-licensed, but it must be done by trained, competent contractors following HSE guidance. Most modern installs sit on profiled steel re-clads.
What about agrivoltaics, solar above crops or grazing?
Agrivoltaics is emerging quickly in the UK. Sheep grazing under elevated panels is well-established. Crops (typically shade-tolerant: leafy greens, soft fruit, hops) under translucent panels are showing promising trial results. SFI does not pay for solar panels, but land under panels can sometimes sit alongside separate environmental actions, subject to scheme rules; check with the RPA.
What grants are available for farm solar?
The 100% Annual Investment Allowance (up to £1m a year) is the main route; no farm solar capital grant is open in England at the time of writing. SFI does not pay for solar panels, and no farm solar capital grant is open in England in 2026. The 100% AIA gives tax relief in year one, and SEG provides ongoing export income. Welsh and Scottish farms should check current devolved schemes, none of which pays for solar panels at the time of writing.
Do tenant farmers need landlord consent?
Yes, for any structural alteration to buildings or land use change. Institutional landlords often have a standard process for tenant-PV consent and addenda. Private landlords vary. Ask the installer whether they can supply a lease addendum template. Some landlords prefer to fund directly with a service-charge recovery from the tenant.
Does solar work on poultry or pig sheds?
Yes, and the economics are often excellent. Modern free-range and broiler poultry sheds have huge clear-span roofs and high year-round ventilation loads. Pig units have high heating loads in cold months and ventilation in summer. Self-consumption depends on sizing: an array matched to the daytime ventilation load uses most of its output on site. Biosecurity protocols (boot dips, restricted access, cleaning) apply during install.
What's the play for an arable farm with seasonal grain-drying load?
Two routes. (1) Size for grain-drying peak, large rooftop or ground-mount, accept lower self-consumption outside drying season, lean on SEG export income. (2) Size smaller for daytime baseload only, add battery for grain-drying season. Ask the installer to model both, the right answer depends on your specific load profile and capital tolerance.
Will solar interfere with farm operations during install?
Rooftop installations rarely disrupt farm operations. Ask the installer to schedule around your busy seasons, calving, lambing, harvest. The only outage is usually final grid connection (4-8 hours), which can be timed for a quiet period. Ground-mount installs need vehicle access for several weeks but don't interrupt main farm operations.
Can farms lease land for solar to a third-party developer?
Yes, this is the ground-mount lease model. Typical rent about £800-£1,000/acre/year (Arup developer survey for DESNZ, July 2025; significantly above arable rental income), 25-40 year terms, third-party developer takes all capex/operational risk. Suits farms with marginal land that's underused. Ask several developers active in your region for terms and take independent land-agent advice.
What about my supermarket buyers, do they care?
Increasingly yes. Tesco Stronger Starts, Sainsbury's Plan for Better, M&S Plan A, Waitrose First Generation, Morrisons (committed to net-zero British farming by 2030), all flow into supplier requirements via CDP Supply Chain disclosures, EcoVadis, and contract terms. Solar generation evidence is auditable Scope 2 reduction.
How long does the install take?
From contract to commissioning: 4-9 months for rooftop installs. Physical install: 1-8 weeks depending on size. DNO connection is the long pole, often 6-18 months for G99. Ask the installer to submit the DNO application early to compress the timeline. Ground-mount above 1 MW typically 12-18 months total including planning.