Commercial Solar Finance for Manufacturing
Daytime-heavy electricity profiles, large industrial roofs, and strong demand for capital efficiency make manufacturing the highest-economic-return sector for commercial solar. See how a Black Country precision engineering firm financed 850kWp using a blended green loan structure.
300kWp – 2MWp
£250k – £1.5m
Among the highest of any sector — manufa
3
Why this sector
Manufacturing is the strongest economic sector for commercial solar in the UK, full stop. Three structural factors drive this: large rooftop areas providing capacity, daytime-heavy electricity profiles delivering high self-consumption, and corporation-tax-paying status enabling full capture of the 50% First Year Allowance. The economics are robust enough that capital purchase or green loan finance dominates the structures we recommend. Manufacturing operations rarely benefit from PPA structures because the lifetime saving gap (typically £400k–£1m on a £500k system over 25 years) is too large to justify, except where capital constraints are binding. The key strategic question for most manufacturers is sizing: oversize and you give SEG income at 8p when self-consumption would have saved 25p; undersize and you leave value on the table. We model the optimal size against actual half-hourly demand data, not headline annual consumption. The right answer is often 70%–90% of peak summer midday demand — enough to absorb most generation directly, with modest export at the shoulders of summer days. Battery storage tips the calculation toward larger systems where the economic case for storage stacks up alongside it.
Electricity profile
High and predictable daytime demand, weekday-skewed, often three-shift in heavier industries with continuous baseload. Self-consumption typically 85%–95% of generation.
Tax position
Manufacturing trading companies are typically corporation-tax-paying, profitable, and able to absorb the 50% First Year Allowance fully. AIA capacity is often committed to plant, vehicles, and IT, so FYA fills the gap. The combined value of capital allowances on a £500k system can exceed £100k of tax saving in NPV terms.
Sector-specific funding
Manufacturing-specific finance options include UK Export Finance support for export-orientated manufacturers, Made Smarter funding (regional, capped) for digital and decarbonisation upgrades, and innovation grants via Innovate UK where solar is part of a broader process decarbonisation package.
Worked example
Precision engineering facility, Black Country. 32,000m² production hall with capacity for 850kWp roof-mounted PV.
£680,000
£172,000 year-one (electricity savings + minimal export at SEG rates)
3.9 years simple; 2.8 years post-FYA
70% green loan / 30% capital. £200k deposit, £480k 10-year loan at 6.8%.
Pitfalls to watch
- Roof condition often the binding constraint — older industrial roofs may need re-roofing first
- Heavy plant on the roof (HVAC, dust extraction, gantries) can sterilise capacity if not designed around
- DNO connection capacity in industrial estates can be limited — early G99 enquiry is essential
- Connected demand response and battery storage can transform economics — worth modelling alongside PV
- Rate-capped supply contracts can mask the true value of self-consumption — confirm contract terms before sizing
Recommended finance structures
Other sectors
Warehousing
Vast roof areas and flat 24/7 demand profiles with strong cold-storage and EV-charging int…
Agriculture
Farm building rooftops, ground-mount potential, and high agricultural electricity demand f…
Schools
PSDS funding routinely covers 75–100% of capital cost, making solar a near-zero-investment…
NHS
PSDS-eligible 24/7 estates with substantial roof area and continuous electricity demand ma…
Detailed finance route for this sector
Commercial solar for manufacturing — detailed sector guide
UK manufacturing businesses are among the strongest candidates for commercial solar investment. The combination of high, consistent daytime electricity demand, significant roof coverage on production buildings, and strong tax positions (25% corporation tax on trading profits, full First Year Allowance eligibility) produces compelling ROI that other sectors rarely match.
Electricity demand characteristics in manufacturing
Manufacturing electricity profiles vary significantly by sub-sector, but several characteristics common to the industry make solar particularly well-suited:
| Manufacturing sub-sector | Typical electricity profile | Ideal solar system size | Key finance consideration |
|---|---|---|---|
| Food & beverage processing | High baseload (refrigeration, CIP); demand 24/7 but solar-usable period is 8am–5pm | 200kWp–2MWp rooftop | FYA maximises tax relief; asset finance preserves working capital for production equipment |
| Plastics & rubber (injection moulding) | Very high daytime demand; moulding machines 30–150kW each; good solar match | 300kWp–3MWp | Capital purchase or green loan typically optimal — strong tax appetite |
| Metal fabrication & engineering | Irregular demand (CNC, welding, press machinery); peak morning and afternoon | 100kWp–800kWp rooftop | Asset finance or HP common — protects existing banking facilities |
| Printing & packaging | High consistent daytime demand (press lines, driers); excellent solar match | 150kWp–1.5MWp | Capital purchase with FYA; or operating lease if working capital constrained |
| Pharmaceuticals & life sciences | Controlled environments, HVAC dominant; 24/7 load; solar covers 25–40% of annual consumption | 500kWp–5MWp | Green loan aligned with sustainability reporting objectives; ESOS compliance driver |
| Automotive components | High seasonal variation; press/stamping plant; ground-mount often available | 500kWp–10MWp | PPA or long-term lease suits large sites with stable production forecasts |
DNO grid connection considerations for manufacturing sites
Large manufacturing sites typically have a High Voltage (HV) or Extra High Voltage (EHV) grid connection — a 11kV or 33kV connection via their own substation. This creates different dynamics for solar export than a standard Low Voltage (LV) connection:
HV connection advantage: higher export limit
Sites with 11kV connections typically have a higher available export capacity than LV-connected neighbours — often 500kW to several MW without DNO reinforcement. Solar systems sized to the available export limit avoid the curtailment penalty that often affects LV-connected sites with large solar arrays.
HV protection relay: mandatory for G99
For solar systems connecting via an existing 11kV substation, the protection relay at the substation must be upgraded or set to meet the G99 requirements — specifically vector shift, rate of change of frequency (RoCoF), and interface protection settings. This typically costs £3,000–8,000 and must be approved by the DNO as part of the G99 connection application.
Metering: half-hourly mandatory above 100kW
Manufacturing sites importing above 100kW are already on half-hourly metering (mandatory since April 2014). This means the site already has the infrastructure for complex TOU tariff analysis and can immediately benefit from demand charge optimisation if battery storage is added.
Solar ROI benchmarks for UK manufacturing (2026)
| Scenario | System size | Capital cost | Year-1 electricity saving | Year-1 tax relief (FYA at 25%) | Simple payback | Blended IRR (25yr) |
|---|---|---|---|---|---|---|
| Mid-size food manufacturer | 500kWp | £520,000 | £104,000 | £65,000 | 4.4 years | 18.2% |
| Engineering firm (100–150 staff) | 250kWp | £255,000 | £51,000 | £31,875 | 4.4 years | 18.0% |
| Logistics/warehousing (large footprint) | 1MWp | £970,000 | £190,000 | £121,250 | 4.6 years | 17.8% |
| Green loan financed (500kWp) | 500kWp | £520,000 (£0 upfront) | £104,000 | £65,000 (FYA still applies) | 3.1 years after financing | 14.5% after-tax |
Assumptions: £0.24/kWh avoided import cost; 0.95 kWh/kWp/day average UK yield; 25% corporation tax; 50% FYA. Actual results vary by site orientation, irradiance, and demand profile. For a project-specific model, use our half-hourly demand analysis service.
Environmental and ESG reporting for manufacturers
Manufacturing businesses are increasingly subject to ESG disclosure requirements — TCFD (Task Force on Climate-Related Financial Disclosures) for larger companies, CDP (Carbon Disclosure Project) reporting for supply chain benchmarking, and the forthcoming UK Sustainability Disclosure Standards (SDS). Commercial solar directly reduces Scope 2 emissions (grid electricity consumption).
Scope 2 market-based vs location-based reporting
Under the GHG Protocol's Scope 2 Guidance, organisations can report Scope 2 emissions using either the location-based method (average grid emission factor, approximately 186 gCO2e/kWh in 2025–26) or the market-based method (the emission factor of the electricity actually consumed). Onsite solar generation displaces grid electricity at the location-based emission factor. A 500kWp system generating 450,000 kWh/year reduces Scope 2 emissions by approximately 83 tCO2e per year at 2026 emission factors.
EV charging integration
Manufacturers with fleet vehicles or workforce EV chargers benefit from combining solar with on-site charging. Solar generation peaks at midday when staff vehicles are parked — smart EV charge scheduling to align with solar peak (via EMS platforms) can achieve 40–60% solar-charged EV kilometres, material for Scope 1 transport emission reduction.
Finance structure decision matrix for manufacturers
| Finance option | Best for | Avoid if | Typical term | Interaction with FYA |
|---|---|---|---|---|
| Capital purchase | Profitable manufacturers with >£200k capital available; 25%+ CT payers | Cash-constrained; loss-making | N/A (outright) | Full 50% FYA in year 1 — maximum tax benefit |
| Green loan (secured) | Manufacturers with property security; stable revenue; 5–15yr horizon | Unsecured balance sheets; short tenure | 5–15 years | Borrower claims FYA — debt does not remove eligibility |
| Asset finance/HP | Manufacturers without property security; prefer asset as collateral | Leasehold with no assignable security | 3–7 years | HP: hirer claims FYA under HMRC guidance (s.67 CAA) |
| Operating lease | Manufacturers prioritising off-balance-sheet; loss-making; strong cash focus | 25%+ CT payers with strong tax appetite | 10–25 years | No FYA for lessee — lessor captures benefit in rate |
| PPA (developer-funded) | Very large sites (>1MWp); long-term occupiers; zero capital budget | Sites with planning constraints or short leases | 15–25 years | No FYA for occupier |
Frequently asked questions
What size solar system does a typical UK manufacturer install?
Why does manufacturing have such strong commercial solar economics?
How does the 50% First Year Allowance affect manufacturing solar projects?
Do PSDS or other public-sector grants apply to private-sector manufacturers?
How does retailer supply-chain ESG procurement affect manufacturers?
Build your sector-specific finance case
We model the right structure for your sector, your tax position, and your specific operational profile.
Request a finance review