Solar panels for farms — UK Specialist Installer

Why solar PV is a strong fit for arable farms

This page focuses specifically on arable and non-livestock farm operations — sister EMDs at solarpanelsforfarms.uk and solarpanelsforfarmbuildings.co.uk cover the broader farm sector including livestock, poultry, and dairy specialisms. Within the arable sub-vertical — cereals, oilseeds, pulses, root crops, sugar beet, vegetables, field-scale horticulture — solar PV economics are particularly strong because of the combination of substantial roof area, high seasonal daytime baseload, and excellent grant funding access.

UK arable farming has been transformed in the past decade by farm consolidation, equipment electrification, and energy cost pressure. The average UK arable holding has grown from 95 hectares in 2010 to 130 hectares in 2025 as smaller farms exit and larger contractor-style operations consolidate. That has driven investment in larger grain stores, modern dryer plants, and processing facilities — typically large steel-portal-frame buildings with 1,000-5,000 sq m of south-facing roof area each. These buildings are essentially purpose-built for solar PV, with ample structural capacity, clear unshaded roof, and connection to a substantial farm electrical supply.

The seasonal load profile is unusual but well-matched to solar. Grain drying represents the single largest electrical load on most arable farms, typically running August through October at harvest with continuous 24-hour operation during peak weeks. A modern continuous-flow grain dryer drawing 50-150 kW of electrical load through harvest creates a perfect alignment with peak summer solar generation. Irrigation through May to September on irrigated crops draws 20-80 kW of pump load on hot dry days — again exactly when solar peaks. Cold storage of root crops and apples through winter draws steady refrigeration baseload. Processing buildings with conveyors, graders, washers, and packing equipment run daytime hours through the active season.

Self-consumption ratios on arable farm PV are excellent. A properly sized system targeting 70-80% generation coverage typically achieves 75-85% self-consumption during the active season, falling to 30-40% during winter shoulder periods. The annualised average is usually 60-70% — strong enough to deliver 5-6 year payback on most arable farm projects.

The second driver is the funding environment. The Sustainable Farming Incentive (SFI), Farming Investment Fund (FIF), Farming Equipment and Technology Fund (FETF), and Environmental Land Management Schemes (ELMS) all have streams supporting renewable energy and energy-efficient infrastructure on farms. SFI 2024 onwards has expanded eligibility to capture more renewable energy interventions. FIF has specifically funded solar PV on farm buildings since 2022. Catchment Sensitive Farming grants in priority water-quality areas can sometimes route to renewable infrastructure. Combined with the 100% Annual Investment Allowance for the corporate or partnership, the grant stack frequently covers 25-40% of capex.

The third driver is the agricultural permitted development right under Class A Part 6 of the GPDO 2015, which covers most rooftop solar on agricultural buildings without full planning. Where the building is in active agricultural use and the panels are on existing roofs, formal planning is generally not required. Conservation area, AONB, and listed-building proximity add specific case-by-case constraints.

System sizing for arable farms

The typical arable farm solar PV system sits between 100 kW and 1,000 kW, comprising 185-1,850 panels and using 600-6,000 square metres of roof area. The actual size depends on roof inventory, seasonal load profile, and DNO connection capacity at the farmstead.

Annual electricity consumption is the starting point. A typical mixed arable farm of 200-400 hectares with on-farm grain drying and storage but no processing might consume 80,000-180,000 kWh a year — a 100-150 kW system fits well. A larger arable holding of 500-1,500 hectares with full grain handling, drying, dressing, and contract drying for neighbours typically uses 250,000-500,000 kWh — a 250-400 kW system fits. A specialist arable processor with continuous-flow drying, contract storage, and on-farm milling or pressing can use 600,000-1,200,000 kWh — a 600 kW to 1 MW system fits, often supplemented with battery storage for peak shaving.

Roof inventory on most arable farms is generous. A typical arable farmstead has multiple steel-portal-frame buildings totalling 2,000-8,000 sq m of roof area: grain store, secondary store, machinery shed, workshop, dryer building, and (on larger farms) processing or packing facility. Modern post-2000 buildings have steel-clad roofs taking conventional clamp-on PV without complication. Older buildings may have asbestos cement sheets requiring removal and re-roofing before PV — this adds £50-£100/sq m to project cost but substantially improves the long-term asset.

Roof orientation is rarely a binding constraint because most farmsteads have multiple buildings on different orientations, and a hybrid array spanning south, east, and west aspects achieves a flat generation profile through the day that matches farm operational load well.

DNO connection capacity is the most common binding constraint for arable farm PV. Many farmsteads have rural overhead supply with 100-300 kVA capacity that limits export. Larger systems typically require G99 with 6-18 month DNO timescales and sometimes capacity reinforcement at the farmstead transformer. We submit DNO applications immediately after structural feasibility to compress the project timeline. Where DNO timelines are impractical, private-wire supply within the farmstead and behind-the-meter strategies can avoid full grid connection.

Cost and payback for arable farms

A 100 kW to 1 MW arable farm PV system in 2026 costs between £85,000 and £850,000 installed, with cost per kilowatt sitting at £850-£950/kW for systems below 200 kW, falling to £750-£850/kW for systems between 200-500 kW, and £700-£800/kW for systems above 500 kW. Asbestos roof removal where required adds £50-£100/sq m to the project; structural reinforcement adds £20-£50/sq m where needed.

Worked example. A 600-hectare arable farm in eastern England with annual electricity consumption of 240,000 kWh on a 23p/kWh agricultural tariff spends £55,200 a year on electricity. A 250 kW system costing £215,000 installed across grain store and machinery shed roofs generates around 230,000 kWh in year one, of which approximately 165,000 kWh (72%) is self-consumed at 23p saving £37,950 in cost avoidance. The remaining 65,000 kWh is exported under SEG at an average 9p/kWh delivering £5,850 of income. Total annual benefit: £43,800. Simple payback: 4.9 years.

Tax relief sharpens the case. Under 100% Annual Investment Allowance, the limited company or trading partnership at 25% corporation tax deducts the full £215,000 from taxable profits in year one, generating £53,750 of tax relief and reducing the net effective cost to £161,250. Post-tax simple payback: 3.7 years. Modelled 25-year IRR around 19%.

Grant capture sharpens further. A typical FIF or SFI capital grant capturing 25-40% of capex (£50,000-£85,000 on this project) reduces net post-tax cost to £75,000-£110,000. On that basis simple payback drops to 1.7-2.5 years. Grant availability varies by scheme round and eligibility — we map current scheme rounds for your specific holding as part of the desk feasibility.

Funding routes are well developed in arable agriculture. Cash purchase from accumulated retained earnings is common in profitable arable years. Asset finance over 5-7 years from specialist agricultural lenders (Oxbury, AMC, NatWest Agri, Lloyds Agri, Barclays Agriculture) is the dominant route, with rates typically 6.5-8.5% for established holdings. PPA is increasingly common at the 500 kW+ end where institutional investors fund the system and the farm contracts to buy power at a fixed unit rate. We model cash, asset finance, and PPA options in every farm quote.

Compliance and regulation specific to arable farms

Farm solar deployment touches several regulatory layers. First, agricultural permitted development. Class A Part 6 of the GPDO 2015 covers most rooftop solar on agricultural buildings without full planning, provided the building is in active agricultural use and the panels are on existing roofs. Volume and visibility constraints apply but rarely bind on rural farmsteads. Conservation area, AONB, SSSI proximity, and listed-status add case-by-case requirements — specifically, AONB buildings often need full planning rather than permitted development.

Second, SFI/FIF/FETF/ELMS scheme compliance. Defra-administered scheme participation may be enhanced by renewable energy deployment. SFI 2024 onwards has expanded eligibility to capture more renewable interventions. FIF rounds have specifically funded solar PV on farm buildings since 2022. Where the farm is participating in any scheme, the solar deployment should be checked against scheme-specific eligibility — scheme stacking rules apply and double-funding is not permitted.

Third, agricultural building structural compliance. Modern steel-portal-frame buildings (post-1990) typically take conventional rail or clamp-on PV without structural complication. Older buildings — particularly traditional Dutch barns, asbestos-cement-clad structures, or pre-1980 timber-framed buildings — need case-by-case structural assessment before any PV mounting design. We require a structural engineer’s report on all buildings older than 1990.

Fourth, DNO connection in rural networks. Rural overhead supplies typically have lower capacity than urban networks. G99 connections at scale (above 100 kW) often face longer DNO timescales — 9-18 months is common in capacity-constrained rural networks across Lincolnshire, Norfolk, parts of Yorkshire, and rural Scotland. Active network management agreements may apply. We submit DNO applications immediately after structural feasibility to compress timeline.

A typical arable farm install scenario

A 750-hectare arable farm in Cambridgeshire growing wheat, oilseed rape, and sugar beet with on-farm grain handling, drying, dressing, and contract drying for three neighbouring holdings. Annual electricity consumption: 320,000 kWh, peaking at 80 kW during harvest grain drying. Tariff: 22p/kWh agricultural fixed contract. Existing bill: £70,400 a year. Holding constituted as a limited company.

The system specified: 350 kW PV array across the grain store (180 kW on the south face), machinery shed (100 kW), and processing building (70 kW), using 645 panels in three rail-mounted plane configurations. Two 200 kW string inverters with integrated DC isolators. Existing asbestos roof on the older grain store was replaced with steel cladding before PV installation. PVSyst yield: 322,000 kWh year one. Self-consumption modelled at 76% based on half-hourly meter data showing strong harvest-season alignment with summer solar peak. Total installed cost: £318,000 inclusive of £45,000 asbestos roof replacement, structural strengthening to one shed, DNO G99 application, and commissioning.

Funding stack: £75,000 FIF capital grant, £243,000 funded through 7-year asset finance from a specialist agricultural lender at 7.5% APR. AIA tax relief year one: £79,500.

Year one results: actual generation 326,400 kWh, self-consumption 78% delivering £56,058 of cost avoidance, plus £6,480 SEG export income. Total benefit £62,538. Post-tax post-grant net cost: £163,500. Post-tax post-grant simple payback: 2.6 years. The holding is now in design for a phase 2 system on a recently constructed 1,500 sq m potato store with 250 kW additional capacity for 2027 deployment.

Trade-specific FAQs

Do agricultural permitted development rights cover farm solar? Yes for most cases. Class A Part 6 of the GPDO 2015 covers rooftop solar on agricultural buildings in active agricultural use, on existing roofs, without full planning permission. Volume limits apply but rarely bind on standard farmstead deployments. Conservation area, AONB, SSSI proximity, and listed-status add case-by-case requirements — AONB buildings often need full planning rather than permitted development. We confirm the planning route for your specific holding as part of the desk feasibility. See our sister-site solarpanelsforfarms.uk for the broader farm sector planning detail and solarpanelsforfarmbuildings.co.uk for building-specific structural guidance.

Can SFI grants fund farm solar? SFI 2024 onwards has expanded eligibility to capture more renewable energy interventions and energy-efficient infrastructure. SFI is paired with the Farming Investment Fund (FIF) capital grant which has specifically funded solar PV on farm buildings since 2022. The Farming Equipment and Technology Fund (FETF) covers a parallel set of equipment-grade interventions. We map current scheme rounds for your specific holding and advise on the optimal grant stack. Scheme stacking rules apply and double-funding is not permitted.

What if my buildings have asbestos cement roofs? Older farm buildings frequently have asbestos cement sheet roofs that cannot directly accept PV. The standard approach is to replace the asbestos roof with profiled steel cladding before PV installation — this adds £50-£100/sq m to the project but substantially improves the long-term asset value of the building. Asbestos removal must be done under HSE-licensed contractor with specific disposal compliance. We coordinate the roof replacement and PV installation as a single project.

How long is the DNO wait in rural areas? G99 connections in capacity-constrained rural networks often take 9-18 months from application to live, with longer waits across Lincolnshire, Norfolk, parts of Yorkshire, rural Scotland, and Wales. Active network management agreements or capacity reinforcement may apply. We submit DNO applications immediately after structural feasibility to compress timeline. Where DNO timelines are impractical, private-wire supply within the farmstead and behind-the-meter strategies can avoid full grid connection.

Will solar interfere with grain drying or refrigeration operations? No — PV system installation is coordinated around the active operational calendar. Grain drying is typically a 6-10 week harvest window, and PV commissioning is scheduled outside this window. Cold storage refrigeration cutover is managed with monitored temperatures throughout, typically a 2-4 hour planned outage window with backup cooling. We work with your farm manager on the operational calendar and do not compromise harvest-critical operations.

Next steps

The first step for any UK arable farm is a free desk feasibility study covering roof inventory, system size, grant stack, and DNO capacity. Send us your last 12 months of half-hourly meter data, an aerial image showing your farmstead buildings, and a brief description of your farming operation, and within 7 working days we will model indicative system size, generation forecast, self-consumption ratio, financial DCF, AIA tax relief, grant capture scenarios, and DNO capacity risk for your specific postcode. To start visit our quote page, review typical costs and payback, explore grants and funding routes, or read our greenhouses sister sector. For broader farm-sector specifics including livestock, poultry, and dairy see our sister sites solarpanelsforfarms.uk and solarpanelsforfarmbuildings.co.uk. Free desk feasibility from your half-hourly meter data.