Why glasshouse tomato & cucumber growers are ideal candidates for solar
UK glasshouse tomato and cucumber production is among the most energy-intensive arms of British horticulture. Heat comes from boilers, CHP or heat networks; on the electrical side, climate control, irrigation, pack lines and cold stores draw power through the day, which is where solar delivers measurable returns. Supplementary LED lighting is needed most in the darker months, when an array makes least. Two pressures sharpen the commercial case: grid electricity is a large and volatile cost, and supermarket Scope 3 reporting pushes growers to document emissions intensity per kilo of product. An array on packhouse and store roofs, or an adjacent ground mount, cuts a grower’s carbon intensity per kilo — something supermarket buyers increasingly ask about. Solar on a glasshouse site needs careful structural design. Panels usually go on adjacent solid-roofed buildings — packhouses and stores — or on a ground mount, and the structure of each building decides it. Panels on the glass itself take light the crop needs: our guide to solar panels for greenhouses shows how much, with month-by-month PVGIS output for the Vale of Evesham. Grid connection is often the critical path: anything above about 3.68 kW per phase needs a G99 application to the network operator, so a large array demands careful load modelling. Battery storage can shift midday generation into evening and overnight LED lighting schedules and help avoid peak-rate periods.
What a typical glasshouse tomato & cucumber growers installation looks like
| Indicative system size | 500–1000 kW |
| Cost | Priced from itemised quotes — no official data above 50 kW |
| Payback | See the worked example |
| Grants (England) | IFP Round 2 closed; no solar round open |
| MCS certified | All matched installers |
Benefits for glasshouse tomato & cucumber growers
- Offset supplementary LED lighting and environmental control loads
- Support CO2 enrichment and fertigation systems
- Scope 3 reporting for supermarket supply contracts
- Carbon intensity per kilo reduction for premium retailers
- Packhouse-roof or ground-mounted arrays beside the glass
- Arrays sized to daytime electrical load
- Battery storage to move load out of peak-price periods
- Integration with existing CHP and heat recovery systems
Grants and finance
In England, the Improving Farm Productivity (IFP) grant funded 25% of eligible costs for rooftop solar and irrigation-reservoir solar only — ground-mounted arrays on land were not eligible. Round 2 has closed and no solar round is open at the time of writing (September 2026); Wales, Scotland and Northern Ireland run their own schemes. The £1m Annual Investment Allowance lets most farm businesses deduct the full cost in the year of purchase. Solar panels are special rate expenditure, so companies can instead claim the 50% first-year allowance, with the rest in the special rate pool at 6% a year.
For zero-upfront installs, ask installers about Power Purchase Agreement (PPA) finance, where you pay only for the electricity generated at a rate below your current grid tariff. Asset finance over a fixed term suits farms with strong cash flow.
Compliance and structural points specific to glasshouse tomato & cucumber growers
In England, rooftop solar on packhouses and stores is usually permitted development under Class J, with prior approval from the council on design and appearance above 50 kW; Class J does not apply to listed buildings or scheduled monuments. A stand-alone ground array over 9 m² needs full planning permission — see solar on farm buildings.
Structural surveys check purlin spacing, rafter capacity and roof sheet condition before any install. Asbestos cement roofing on older sheds is always fragile and cannot bear weight, so avoid drilling through it: overclad with non-asbestos sheeting on the existing purlins, or remove and re-sheet; a whole roof needs a proper risk assessment and plan of work (asbestos roofs). Three-phase supply upgrades are handled with the local DNO (UKPN, NGED, SSEN, SP Energy Networks or Northern Powergrid).
Get a quote for solar on your glasshouse tomato & cucumber growers farm
Free desk-based feasibility from your half-hourly meter data. Fixed-price proposal from a matched MCS-certified installer within 7 working days, anywhere in England, Wales, Scotland and Northern Ireland.
Solar for glasshouse tomato & cucumber growers at a glance
- Indicative system size
- 500–1000 kW — confirm from your meter data
- Cost benchmark
- £1,262 per kW median, 10–50 kW systems (DESNZ 2025/26)
- Rooftop planning (England)
- Usually permitted development under Class J; prior approval above 50 kW
- Grants and tax (England)
- IFP solar round closed; £1m Annual Investment Allowance
Common questions
How much do solar panels for a farm cost in the UK?
Dairy and livestock parlour installs (30–250 kW): £32,000–£225,000. Arable rooftop installs (50–500 kW): £45,000–£500,000. Ground-mount agrivoltaic schemes (500 kW–10 MW): £350,000–£8m+. Cost per kW is typically £750–£1,000 for rooftop above 100 kW, £600–£800/kW for ground-mount above 500 kW.
What's the payback for a dairy farm solar install?
5–6 years. Dairy farms have outstanding self-consumption (24/7 milk cooling, parlour pumps, lighting) — often 90%+ of generation is consumed on site. Combined with 100% AIA tax relief, dairy installs sit alongside cold-chain warehouses as the fastest-payback segment in UK commercial solar.
Can we install solar on asbestos cement farm roofs?
No — asbestos cement roofs must be replaced first. The most common solution is a combined re-roof + PV install where the PV business case partially funds the re-roof. CAR 2012 governs asbestos handling — only licensed contractors can remove asbestos cement. 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 is showing promising trial results. Defra and NFU are engaged. SFI 2025 is expected to add specific agrivoltaic compatibility actions.
What grants are available for farm solar?
100% AIA tax relief is universal. SFI actions support agrivoltaic schemes and biodiversity-stacked installs. Farming Investment Fund occasionally relevant. Welsh and Scottish farms have their own devolved schemes with often-higher intervention rates. SEG provides ongoing export income.
Do tenant farmers need landlord consent?
Yes — for any structural alteration to buildings or land use change. Most institutional landlords (Crown Estate, Church Commissioners, Wellcome Trust, county councils) have standard tenant-PV addenda. Private landlords vary. We provide the lease addendum template. Some landlords prefer to fund directly with a service-charge recovery from the tenant.
Related pillar pages
- • Farm solar costs 2026 — government data by size
- • Solar panels on farm buildings — roofs, rules and grants
- • UK farm solar grants — what is open and closed
- • 2026 grant position
- • Finance options — capex, asset finance, PPA
- • How to choose an agricultural solar installer
- • Farm solar maintenance after installation
- • Farm solar glossary A–Z
- • Worked examples by farm type (modelled)