Solar PV for Devon grain store operations in 2026
Devon commercial farming is shaped by the UK's most productive dairy region (south Devon produces ~4% of England's milk), Dartmoor commoned grazing, South Hams horticulture and emerging vineyard estates, Duchy of Cornwall presence. Grain Store operations across Devon represent one of the strongest solar PV deployments we deliver — Modern grain stores often 1,000–3,000 sqm clear-span — among the largest commercial roofs in rural UK. For a typical Devon grain store install in 2026, expect a system in the 50–500 kW range, project value £45,000–£450,000, simple payback 6.5 years before tax relief.
Devon-specific grain store considerations
The combination of Devon's agricultural intensity and the grain store sub-vertical's specific load profile creates strong economics for solar PV deployment. Most Devon grain store buildings have ample south- or east-west-facing roof area, structurally adequate cladding (or asbestos cement requiring combined re-roof + PV), and significant on-site electrical baseload that aligns with solar generation. Permitted Development for rooftop PV under Class A Part 14 GPDO 2015. Grain dust ATEX zone 22 considerations for any cable penetrations. NABIM and AIC scheme participants benefit from documented sustainability metrics.
Typical Devon grain store install
- System size
- 50–500 kW
- Panel count
- 92–920
- Roof area
- 300–3,000 sqm
- Project value
- £45,000–£450,000
- Simple payback
- 6.5 years
- Annual generation
- 46,000–460,000 kWh
- DNO
- National Grid Electricity Distribution
Why Devon grain store solar makes economic sense
The 2026 economics are dominated by three factors specific to Devon grain store operations: (1) on-site self-consumption ratio — Grain Store buildings typically achieve high daytime PV self-consumption thanks to modern grain stores often 1,000–3,000 sqm clear-span — among the largest commercial roofs in rural uk; (2) Devon regional electricity tariffs sit in the 22–28p/kWh range for commercial supplies, meaning each self-consumed kWh saves 1.5–3× what an exported kWh under SEG returns; (3) 100% Annual Investment Allowance applies to the full capex in year one, delivering effective 25% tax relief for incorporated farms. Combined, these drive payback periods of 6.5-yr nominal and roughly 4.7-yr after-tax.
Combined re-roof + PV on older Devon grain store buildings
Many Devon grain store buildings pre-date 2000 and carry asbestos cement cladding. Under Control of Asbestos Regulations 2012, asbestos cement cannot be retrofitted with PV. The standard solution is a combined re-roof + PV project: HSE-licensed asbestos removal (£30–£50/sqm), profiled steel re-cladding (£45–£80/sqm), then PV install on the new roof. The PV business case routinely pays for 60–100% of the re-roof over the 25-year system life. We've delivered combined re-roof + PV across Devon regularly since 2019.
Devon grain store solar — key features
- Modern grain stores often 1,000–3,000 sqm clear-span — among the largest commercial roofs in rural UK
- Grain drying is a major seasonal load — PV typically pairs with battery for peak-period drying support
- Strong fit with ground-mount addition on adjacent farmyard hardstanding
How we deliver Devon grain store solar
Every project starts with a free desk-based feasibility study. Send us your half-hourly meter data and building dimensions; we share an indicative system size, generation forecast, self-consumption ratio, and 25-year financial model within 7 working days. If the numbers work, our engineers visit for a one-day structural and electrical survey. We deliver a fixed-price proposal with full PVSyst yield modelling and DCF financial model. From contract: typical 4–7 months to commissioning for rooftop installs; 6–9 months for combined re-roof + PV. We schedule physical works around the grain store operation's busy seasons.
For more on grain store solar generally see our Grain Store specialist page; for wider Devon farm solar coverage see Devon Farm Solar.
Common questions
How much does a Devon grain store solar install cost?
Typical Devon grain store installs in 2026 range from £45,000–£450,000, depending on roof area, electrical capacity and whether re-roofing is required. Cost per kW: £800–£1,000 for sub-100 kW, £750–£900 for 100–250 kW, £700–£850 for above 250 kW. We provide fixed-price proposals within 7 working days of receiving meter data.
Do you cover all Devon farm locations?
Yes — we deliver across the entire Devon agricultural region. Whether your grain store is in a major town or a remote rural location, we provide the same fixed-price desk feasibility and on-site survey. Most Devon locations are accessible within 60–90 minutes of our base.
What is the Devon grid connection process for grain store solar?
National Grid Electricity Distribution is the regional DNO covering most of Devon. G99 connection timelines run 65–90 working days for technical study, 6–14 months for full connection on most rural feeders. We submit G99 immediately after structural survey to compress timeline. For export-constrained sites we design "no-export" systems sized for self-consumption that connect in 6–8 weeks.
What is the typical payback for Devon grain store solar?
Simple payback 6.5 years before tax relief, pulled to approximately 4.7 years after 100% Annual Investment Allowance for incorporated farms at 25% corporation tax. 25-year IRR typically 13–17%.
What grants are available for Devon grain store solar?
Headline schemes: 100% Annual Investment Allowance (universal); Smart Export Guarantee 8–15p/kWh on surplus; Sustainable Farming Incentive 2025 biodiversity actions; Farming Investment Fund where solar pairs with eligible items (robotic milking, grain dryers). Welsh and Scottish farms have additional devolved schemes.