Agrivoltaics — also called solar sharing or dual-use solar — is the practice of designing a solar PV installation so the land beneath the panels remains productive for grazing, pollinator habitat or even compatible crop cultivation. It is the most credible answer to the food-vs-energy land debate that has politicised large UK solar farms since 2023, and it has become commercially attractive for UK farmers in 2026 thanks to Sustainable Farming Incentive (SFI) payments that stack on top of solar generation income.
Why agrivoltaics matters in 2026
Defra's 2024 guidance on "best and most versatile" (BMV) agricultural land tightened ground-mount solar approvals on Grade 1, 2 and 3a land. Most large UK solar farms have therefore had to site on Grade 3b or worse. Agrivoltaics turns the question on its head: if the land remains agriculturally productive, the food-vs-energy trade-off largely dissolves. Modern elevated PV arrays leave 90%+ of land usable for grazing, biodiversity ground cover or specific shade-tolerant crops.
Three practical UK agrivoltaic models
1. Sheep grazing under elevated panels
Standard ground-mount frames with 0.8–1.2m clearance below the lower edge of the panels. Sheep — typically Welsh Mules, Suffolk-cross or Romney — graze freely between rows. Stocking density: 5–7 ewes per hectare versus 8–10 on equivalent open pasture, so a small productivity hit on grazing offset by significant solar income. UK reference site: Owl's Hatch Solar Park in Kent (49.9 MW with active sheep grazing since 2017).
2. Pollinator-friendly wildflower ground cover
Solar arrays planted with native UK wildflower seed mixes — Yellow Rattle, Common Knapweed, Birdsfoot Trefoil, Field Scabious. Generates strong biodiversity outcomes, qualifies for SFI Pollinator and Farmland Wildlife Package (£600–£800 per hectare per year), and reduces grass-mowing costs to essentially zero. Reference site: Eveley Solar Farm (post-construction biodiversity audit showed 6× higher pollinator counts than baseline arable use).
3. Elevated arrays with shade-tolerant crops
Continental European agrivoltaics — common in Germany, Italy and France — uses panel arrays elevated 2.5–4m above ground level to allow cropping below. UK trials underway with soft fruits (raspberries, blackcurrants) and salad leaf production. Capital cost is materially higher than standard ground-mount (typically 25–35% premium) but justified where high-value protected cropping is the alternative.
Worked example: 50-acre Mendip dairy with agrivoltaic ground-mount
| Stream | Year 1 | 25-year |
|---|---|---|
| Solar generation savings (1 MW @ 70% self-consumed) | £185,000 | £5.6m |
| SEG export (30% surplus) | £28,000 | £840k |
| SFI Pollinator Package (40 ha @ £700/ha/yr) | £28,000 | £840k |
| Reduced sheep stocking (10 to 7 ewes/ha) opportunity cost | −£12,000 | −£360k |
| Net benefit | £229,000 | £6.9m |
Figures assume Mendip irradiance (1,050 kWh/kWp), 70% self-consumption on dairy enterprise, 30p/kWh tariff, 8p/kWh SEG, SFI Pollinator Package, and replacement-cost sheep grazing displacement. Real economics vary by site.
Planning advantage of agrivoltaics
Defra and local planning authorities have generally been materially more supportive of agrivoltaic proposals than equivalent solar-only ground-mount. Three reasons: (1) the land remains agriculturally productive so BMV concerns dissolve; (2) biodiversity ground cover delivers measurable environmental net gain (mandatory since 2024 under the Environment Act); (3) farm income diversification fits the SFI policy frame.
Practical examples: a 2024 agrivoltaic application near Castle Cary in Somerset received determination in 6 weeks versus typical 12+ weeks for solar-only ground-mount in the same district. A similar 2025 application on the Mendip-edge passed without planning conditions on visual impact, which would normally have required £30k+ of additional landscape work.
SFI payment stacking
- ✓ SFI Pollinator and Farmland Wildlife Package — £600–£800 per hectare per year for pollinator-friendly ground cover
- ✓ SFI Hedgerows — £6–£12 per metre per year for hedgerow management around solar field perimeters
- ✓ SFI Improved Grassland Soils — £40 per hectare per year for sheep-grazed agrivoltaic sites
- ✓ SFI Wetland Habitats — £600+ per hectare per year for Levels and lowland wet grassland agrivoltaic sites
- ✓ Countryside Stewardship capital grants where the project delivers measurable biodiversity uplift
Limitations of agrivoltaics
- ✗ Higher capital cost (15–35% premium for elevated structures vs. standard ground-mount)
- ✗ Lower kWp per acre (typically 0.5–0.7 MW/hectare vs. 0.8–1.0 for solar-only) due to spacing for animal/crop access
- ✗ Reduced grazing density (5–7 ewes/ha vs. 8–10 on open pasture)
- ✗ Specialist mowing or grazing management required to maintain wildflower mixes — not just standard agricultural practice
- ✗ Some shade-sensitive crops (cereals, brassicas) genuinely unsuitable beneath panels