Agrivoltaics UK — Combining Solar Generation with Crop Production

Agrivoltaics — sometimes called agri-PV or dual-use solar — refers to systems where solar photovoltaic panels are installed over or between growing crops, allowing the same land area to simultaneously produce electricity and food. Originally developed in Japan and Germany in the 1980s and 2000s respectively, agrivoltaics has evolved from an academic concept into a commercially deployed technology attracting growing interest from UK farmers, landowners, and agricultural planners.

The core appeal is straightforward: UK farmers face pressure on margins from all directions, while solar developers face increasingly limited land availability and community opposition to large-scale solar farms. Agrivoltaics offers a potential path that addresses both constraints — generating clean energy income without removing productive agricultural land from food production. This guide explains the technology in detail, reviews the UK research evidence, examines the commercial models emerging in this country, and outlines the practical and planning considerations for farms exploring the option.

The Scientific Evidence Base

The fundamental hypothesis behind agrivoltaics — that crops and solar panels can coexist productively on the same land — is now well supported by research. The key mechanism is partial shading. Most crop plants do not use all available sunlight for photosynthesis; indeed, many species reach photosynthetic saturation at light levels well below full midday sun. The partial shade created by elevated solar panels above crop rows can, in appropriate combinations, reduce heat stress, water evaporation, and light-induced crop damage while allowing adequate photosynthesis to continue.

Research at the University of Sheffield and Lancaster University has demonstrated positive or neutral crop yields in agrivoltaic configurations for several important UK species including lettuce, spinach, celery, and various soft fruits. The German Fraunhofer Institute for Solar Energy Systems — which pioneered modern agrivoltaic research — has published studies showing land equivalent ratios (LER) of 1.3 to 1.7 for agrivoltaic systems, meaning that the combined food and energy output from one hectare of agrivoltaic land exceeds what could be produced by separately optimising crop and solar production on separate parcels of the same total area.

Not all crops respond equally well. High-light crops including most grain cereals, oilseeds, and maize perform less well under partial shade, making agrivoltaics less suitable for the arable heartland of East Anglia and the East Midlands. Lower-light and shade-tolerant crops — including potatoes, leafy vegetables, soft fruits, herbs, and some brassicas — are better candidates. Livestock grazing beneath elevated solar panels (bifacial panels mounted 2.5-3 metres above ground) is also well-established and particularly suited to sheep and cattle operations. For guidance specific to different farm types, Solar Panels For Farms UK covers agrivoltaic applications by farm type across the full range of UK agricultural operations.

Agrivoltaic System Designs

Elevated Fixed-Tilt Systems

The most common agrivoltaic design in commercial deployment elevates standard monocrystalline solar panels to a height of 2.5-4 metres above ground on galvanised steel posts set on a north-south row orientation. Panel rows are spaced at 8-15 metre intervals to allow adequate light penetration and equipment access between rows. Standard tractors, combine harvesters, and sprayers can typically operate beneath elevated systems mounted at 3.5m or above.

This design produces full electricity generation equivalent to a conventional ground-mount array, while allowing standard arable or horticultural operations to continue in the inter-row spaces. The limitation is the row spacing requirement: land coverage by panels is typically 30-50%, compared to 60-70% for a conventional ground-mount solar farm. Energy output per hectare is therefore lower, but this is offset by the continued agricultural productivity of the land. For a detailed comparison with conventional ground-mount installation approaches, ground-mounted vs roof-mounted solar provides relevant context.

Bifacial Vertical Systems

An increasingly adopted agrivoltaic variant uses bifacial panels mounted vertically in east-west orientation, generating electricity from both sunrise and sunset rather than the midday peak of conventional tilted panels. The energy yield distribution through the day is flatter, which can better match some farm demand profiles. The vertical orientation allows standard arable machinery to pass between rows at standard spacing and maximises land available for crop production — typically 85-90% of the ground area remains accessible. German and French pilots have demonstrated this design's compatibility with cereal and root crop production at commercial scale.

Greenhouse-Integrated Systems

Horticultural operations — including soft fruit polytunnels, mushroom farms, and hydroponic growing facilities — can integrate solar panels directly into roof structures, generating electricity while using controlled natural light transmission for crop production. Semi-transparent panels using thin-film or spaced crystalline cells allow a calibrated percentage of sunlight through. This design is particularly well-suited to crops requiring shade management, including mushrooms, lettuce, and herbs. For mushroom and hydroponic farm specific applications, our farm type guides cover the energy and solar economics in detail. For comparison with how other controlled-environment operations — including solar panels for schools and solar panels for charities — approach building-integrated solar, these resources provide useful context.

Commercial Viability in the UK

The commercial case for agrivoltaics in the UK depends on four interacting variables: electricity generation income, agricultural productivity retained, capital cost premium over conventional solar or agricultural investment, and subsidy and planning framework.

On electricity generation: an agrivoltaic system generating 800-1,200 MWh per year per hectare (typical for elevated fixed-tilt at UK latitudes) is worth £80,000-£144,000 in avoided grid electricity costs and Smart Export Guarantee income at current rates, or considerably more under a Power Purchase Agreement with a commercial off-taker. For agricultural businesses with significant on-site electricity consumption — dairy units, grain dryers, cold stores, irrigation systems — the self-consumption rate and therefore the financial value is higher. The business solar calculator provides a useful framework for initial financial modelling.

On capital cost: agrivoltaic systems are currently 15-30% more expensive per kWp installed than conventional ground-mount solar, reflecting the elevated mounting structure, wider post spacing, and additional civil works required. As the market scales and standardised mounting systems become more widely available from UK and European manufacturers, this premium is expected to fall. Current installed costs for agrivoltaic systems in the UK range from £900-£1,400 per kWp, compared to £700-£1,000 per kWp for conventional ground-mount. For comprehensive cost benchmarking, commercial solar cost UK tracks agricultural and commercial solar pricing across system types.

On land rent: conventional solar farms offer landowners £800-£1,200 per hectare per year in ground rent. Agrivoltaic arrangements are typically structured differently — the farmer retains ownership of both the solar system and the agricultural operation, capturing the full electricity generation value rather than only a land rent. For farms with access to grant funding and capital allowances, this owner-operator model significantly outperforms the ground rent model over a 25-year period. A full comparison of ownership structures is at commercial solar panels installation.

Planning Policy and the Agricultural Nexus

Planning policy is the single greatest constraint on agrivoltaic deployment in the UK. Large ground-mount solar installations — even those incorporating agricultural use — are classed as major development and require full planning permission. The National Planning Policy Framework (NPPF) requires local planning authorities to give significant weight to the benefits of renewable energy, but also to protect the best and most versatile agricultural land (Grades 1, 2, and 3a).

The UK government's 2023 planning guidance update specifically referenced agrivoltaics as a form of development where the dual-use nature of the land should be considered a material benefit in planning assessments. Several local planning authorities have subsequently approved agrivoltaic applications that might previously have been refused on agricultural land protection grounds. The planning landscape is evolving, but remains uncertain and case-specific.

For installations below 1 MW on farm land where the panels are subordinate to the agricultural use — as in most on-farm agrivoltaic systems — permitted development rights under Part 6 Class A of the GDPO may apply for some element of the development, though this requires case-by-case legal review. Our detailed guide on planning permission for solar panels on agricultural land covers the planning framework in detail, including the specific considerations for agrivoltaic systems.

Grant Funding for Agrivoltaic Projects

The Farming Equipment and Technology Fund (FETF) covers roof-mounted solar on agricultural buildings but does not specifically cover ground-mounted agrivoltaic systems. However, Countryside Stewardship capital grants can fund agrivoltaic elements where they contribute to biodiversity and environmental outcomes — particularly relevant for systems incorporating wildflower margins, pollinator corridors, or wetland habitat beneath or around panels.

The new Sustainable Farming Incentive (SFI) structure includes actions that reward the maintenance of wildlife-friendly management under and around solar installations. The combination of SFI payments, electricity generation income, and retained agricultural productivity creates a genuinely attractive financial picture for the right farm and land type. For the complete grants landscape, commercial solar grants covers all available funding mechanisms including those applicable to agrivoltaic projects. Finance options — particularly relevant for the higher capital cost of agrivoltaic mounting structures — are covered at commercial solar finance.

UK Case Studies and Pilot Projects

Several UK farms are operating or developing commercial agrivoltaic systems. A Worcestershire soft fruit grower installed a 250kWp elevated system over strawberry polytunnels in 2023, reporting a 15% reduction in irrigation requirements, elimination of bird netting costs (the panels provide physical protection), and annual electricity savings of £65,000. A Yorkshire hill farm has operated bifacial vertical panels over permanent pasture for two years, with no measurable impact on grass yield and an annual SEG income stream of £28,000.

The Innovative Farmers network, supported by the AHDB, has published preliminary findings from agrivoltaic trials on UK market gardens and horticultural holdings. Early results are broadly consistent with European research — neutral to positive effects on shade-tolerant crops, mixed results on light-demanding species, and clear water-use efficiency benefits in dry summers. For farms in other sectors considering how solar integrates with their operations, comparisons with solar panels for hotels, solar panels for care homes, and solar panels for restaurants show how dual-use thinking applies across different operational contexts.

Is Agrivoltaics Right for Your Farm?

Agrivoltaics is not the right solution for every farm. The conditions most favourable to a successful agrivoltaic project include:

• Land growing shade-tolerant crops (soft fruits, vegetables, herbs, horticulture)
• Livestock operations on permanent pasture with existing or planned fencing infrastructure
• Farms with significant on-site electricity consumption enabling high self-consumption rates
• Holdings with sympathetic planning authorities and no designation that precludes solar development
• Operations with the capital or access to finance required for the higher upfront cost

Farms in East Anglia, the East Midlands, or other intensive arable areas with primarily high-light crops are generally less suitable for agrivoltaics, though not universally excluded — border strips, headlands, and areas adjacent to farm buildings can often accommodate elevated arrays without disrupting the main cropping operation.

The best starting point is a feasibility assessment from an MCS certified installer with specific agrivoltaic experience. Regional specialists including Green Hat Renewables in East Anglia, ALPS Electrical in Yorkshire, Midland Solar in the Midlands, Solent Solar in Hampshire, YEERS nationally, and Sola UK in the Home Counties can provide initial guidance on system design, planning prospects, and financial modelling for your specific farm.

For general-purpose commercial building solar applications including solar panels for factories, solar panels for warehouses, solar panels for office buildings, solar panels for new builds, solar panels for data centres, and solar panels for colleges, the sector-specific EMD sites provide tailored guidance for each property type.