Solar Panels for Industrial Buildings (UK 2026)
Costs, sizing, structural realities and the 2026 funding stack — modelled independently.
UK industrial buildings are the strongest commercial solar candidates by underlying economics. Large flat roofs, strong daytime demand, rising electricity intensity, exceptional self-consumption. With IETF closed for new applications, the 2026 stack still pays back industrial PV in 4-6 years.
Industrial rooftop solar generates electricity at roughly 5-7p/kWh over a 25-year life versus 22-28p/kWh from the grid in 2026 — a 70-80% lower unit cost on every kWh you self-consume. As the only independent funding specialist on this page, we take no installer commission: the numbers below are modelled to help you decide whether and how to fund, not to sell you an install.
Why industrial buildings are the strongest UK commercial solar fit
Three structural advantages make industrial buildings the most reliable commercial solar candidate by economics:
- Roof inventory. Industrial sites typically have 1,500-11,000 m² of usable roof. Modern post-2000 portal frames are largely unobstructed by plant, with low-pitch corrugated metal that suits standard mounting systems.
- Demand profile. Most industrial processes run 06:00-18:00 Mon-Sat, with continuous processes (cold storage, certain chemicals, data centres) running 24/7. Solar generation aligns almost perfectly with industrial daytime demand. Self-consumption rates on industrial sites are typically 75-95% — exceptional among commercial sectors.
- Rising electricity intensity. UK manufacturing is electrifying. Induction furnaces replacing gas, CNC machining replacing hand work, electric injection moulding, electric process heat. The marginal kWh cost of electricity is rising materially in the next decade. Solar caps that exposure on the volume you generate yourself.
Industrial solar by sub-sector
Manufacturing (factories)
Strong fit across most sub-sectors. Metal fabrication, food processing, plastics, chemicals, paper, ceramics — all suit solar economically. Typical projects 300kWp-2MWp on rooftop. Manufacturing-specific guide.
Distribution & logistics warehouses
The largest UK rooftop opportunities. Big-box logistics buildings (DIRFT, East Midlands Gateway, Trafford Park, Aire Valley) typically have 5,000-50,000 m² of roof. PPA-funded structures dominate at this scale (5.4-6.4p/kWh tariffs typical for investment-grade tenants). Warehousing & logistics guide.
Light industrial units & multi-occupier estates
Smaller industrial units on multi-let estates — typically 200-2,000 m² each, the kind of light-industrial premises found on every UK business park. Variable economics depending on lease structure and roof tenure. Landlord-funded with tenant off-take is the typical structure. Project sizes 100-500kWp per unit or estate-wide. Where a single occupier owns or holds a long lease on an industrial unit, rooftop solar pays back as fast as on larger sites — the constraint is usually roof tenure and the landlord-tenant split, not the underlying economics. We model estate-wide and single-unit options side by side.
Heavy industry / process plants
Steel, glass, ceramics, chemicals. Energy intensity is exceptional. The English IETF was the prime grant route until Spring 2024 closure. Post-IETF, Scottish process industries can use SIETF; English/Welsh sites use the Annual Investment Allowance (AIA) + PPA. Project sizes typically 1-5MWp + ground-mount where land available.
Data centres
Continuous high load makes data centres exceptional self-consumption sites. UK data centre buildout is accelerating (London, Slough, Manchester corridor). Scottish data centres still IETF-eligible (SIETF). English data centres use AIA + PPA. Project sizes typically 500kWp-5MWp + ground-mount where land available.
Structural and DNO realities
The headline £540-£1,100/kWp UK price assumes a clean install. For industrial buildings, the three most common cost surprises:
Pre-2000 portal-frame buildings
Often need additional purlin or bracing to take 12-15 kg/m² PV load. Engineer's report £600-£1,200. Bracing work typically £8k-£25k for a 1,500-3,000 m² roof. Higher snow-load zones (Scotland, Pennines, North East) need stronger structural margins. Modern post-2000 buildings rarely need reinforcement.
Asbestos cement roofing
A significant share of 1970-1985 industrial buildings have asbestos-cement roofing. Solar mounting through asbestos is restricted under HSE rules. Standard approach: replace roof under separate capital programme, install PV on the new substrate.
DNO connection
For systems above 16A per phase (4kW single-phase, 12kW three-phase), G99 application is required. UK DNO turnaround in 2026 is 60-110 working days for sub-500kW projects. Non-contestable reinforcement charges have hit £8k-£180k unexpectedly. Active constraint zones in 2026:
- Hams Hall / Castle Bromwich (Birmingham automotive cluster)
- Trafford Park ANM zone (Manchester)
- Holbeck and Hunslet inner Leeds substations
- Central Glasgow M8 corridor (Govan, Scotstoun)
- Central Liverpool (Vauxhall Road, Edge Hill, Bootle)
- Older inner Sheffield (Heeley, Attercliffe, Tinsley)
The 2026 funding stack for industrial solar
What's still active for industrial buildings, by geography:
- England (post-IETF closure): Annual Investment Allowance (AIA) + 0% VAT + SEG + PPA + (if in Mayoral Authority area) Local Growth Fund
- Scotland: Scottish IETF (SIETF) still active + AIA + 0% VAT + SEG + PPA
- Wales: Welsh Industrial Decarbonisation programmes + AIA + 0% VAT + SEG + PPA
- Northern Ireland: Invest NI Capital Grants + AIA + 0% VAT + SEG + PPA
For deeper detail on each: why Full Expensing does not cover solar, and what to claim instead, SEG, PPAs, Local Growth Fund, SIETF.
Worked example — typical UK industrial project 2026
A representative UK manufacturer with 2.4 GWh/year electricity demand, 4,200 m² rooftop:
- System size: 800 kWp (well-sized to demand profile)
- Headline capex: £580,000 turnkey
- Annual Investment Allowance (AIA) tax relief: £145,000 (25% effective on capex — the £580,000 spend sits inside the £1m AIA cap)
- 0% VAT applied at install
- Net cost: £435,000
- Annual savings (electricity displacement + SEG export): £148,000
- Payback: 2.9 years
- 25-year cumulative savings (CPI-adjusted): £4.8m+
For sites that fit a Power Purchase Agreement (1MW+, investment-grade tenant covenant, 15+ year horizon), the alternative is zero capex with a 5.4-6.4p/kWh tariff. See live IETF + AIA case. See live PPA case.
Is your industrial building a good solar candidate? A 30-second check
Six factors decide whether solar panels on an industrial building stack up. Green across the board means a fast 4-5 year payback; one or two ambers usually just shifts the funding route or adds a structural line; a red is a fixable obstacle, not a no.
| Factor | Green — ideal | Amber — workable | Red — fix first |
|---|---|---|---|
| Roof age | Post-2000 portal/composite | 1985–2000 steel | Pre-1985 / asbestos-cement |
| Usable roof area | ≥1,000 m² clear | 300–1,000 m² | <300 m² or heavily obstructed |
| Roofing material | Composite / standing-seam | Single-ply / older metal | Asbestos-cement (re-roof first) |
| Load profile | 24/7 or 2-shift daytime | Single-shift weekday | Low daytime / mostly night |
| Roof tenure | Freehold / long lease (>15 yr) | 8–15 yr lease | <8 yr lease, no landlord deal |
| Electrical supply | Three-phase, headroom | Three-phase, constrained | Single-phase only |
How much do solar panels for industrial buildings cost? 2026 cost-per-kWp
Indicative UK turnkey pricing for the standard 50kWp-1MWp industrial range, anchored to the £540-£1,100/kWp band we see across recent projects. Costs per kWp fall as systems get larger because fixed engineering, DNO and access costs spread over more capacity. Net cost after the Annual Investment Allowance (AIA) and 0% VAT is roughly 60% of the headline figure. Figures are indicative and exclude battery, EV charging and any roof remediation.
| System size | Indicative capex | £/kWp | Panels (approx) | Roof area | Annual generation | Indicative payback |
|---|---|---|---|---|---|---|
| 50 kWp | £44,000–£55,000 | £880–£1,100 | ~110 | ~300 m² | ~47,500 kWh | 4–6 yrs |
| 100 kWp | £82,000–£100,000 | £820–£1,000 | ~220 | ~600 m² | ~95,000 kWh | 4–6 yrs |
| 250 kWp | £175,000–£205,000 | £700–£820 | ~550 | ~1,500 m² | ~237,500 kWh | 4–5 yrs |
| 500 kWp | £330,000–£380,000 | £660–£760 | ~1,100 | ~3,000 m² | ~475,000 kWh | 4–5 yrs |
| 750 kWp | £480,000–£555,000 | £640–£740 | ~1,650 | ~4,500 m² | ~712,500 kWh | 4–5 yrs |
| 1 MWp | £620,000–£730,000 | £620–£730 | ~2,200 | ~6,000 m² | ~950,000 kWh | 4–5 yrs |
How much roof do I need? Roof area to system size
Self-size from your building footprint. A standard commercial panel is about 1.8m x 1.1m (utility modules ~2.3m x 1.1m), and every 1,000 m² of usable, unshaded roof hosts roughly 165kWp. Plant, rooflights and walkways reduce usable area, so treat these as upper bounds.
| Usable roof area | Approx system size | Approx panels | Approx annual generation |
|---|---|---|---|
| 500 m² | ~80 kWp | ~180 | ~76,000 kWh |
| 1,000 m² | ~165 kWp | ~370 | ~157,000 kWh |
| 2,500 m² | ~415 kWp | ~920 | ~394,000 kWh |
| 5,000 m² | ~830 kWp | ~1,840 | ~789,000 kWh |
| 10,000 m² | ~1.65 MWp | ~3,650 | ~1,570,000 kWh |
Smart Export Guarantee rates for industrial solar (2026)
Industrial sites self-consume 75-95% of what they generate, so export income is the smaller part of the return — but on the kWh you do export it pays to be on the right tariff. Indicative 2026 SEG rates by named supplier. The SEG obligation requires suppliers with 150k+ customers to offer a rate above 0p; your system must be MCS-certified under 5MW with half-hourly export metering. See our full Smart Export Guarantee explainer and all suppliers compared.
| Supplier / tariff | Indicative rate (p/kWh) | Type | Notes |
|---|---|---|---|
| Octopus Outgoing Fixed | 12p flat | Fixed | Cut from 15p to 12p on 1 Mar 2026 — now level with EDF Export 12M Small Business and SP SmartGen+; requires Octopus import |
| Octopus Outgoing Agile | 14–18p avg | Dynamic | Half-hourly; Intelligent/Flux peaks ~30p; needs battery to exploit |
| EDF Export 12M Small Business | 15p gated / 3.0p open | Fixed | The 15p tier needs an EDF import contract; the open rate is 3.0p. Not a no-import switch |
| EDF Export Variable | 12–18p banded | Semi-dynamic | Peak ~18p; SEG-only available |
| Scottish Power SmartGen+ | ~12p | Fixed | Requires SP import |
| British Gas Export & Earn Plus | 6.4p | Fixed | Requires BG import |
| E.ON Next Export | ~5.5p | Fixed | Legacy-level rate |
| OVO SEG | ~5p | Fixed | Legacy-level rate |
| Shell Energy | ~3.5p | Fixed | Lowest of the named field |
Rates are indicative for 2026, verified July 2026 (Octopus Outgoing Fixed was cut from 15p to 12p on 1 March 2026), and change frequently — confirm current terms before signing. High self-consumption beats export economics for industrial loads: every kWh used on site is worth the ~22-28p grid price you avoid, far above any export rate.
Self-consumption vs export: industrial load profiles
The single biggest driver of industrial solar ROI is how much of the generation you use on site rather than export. High-daytime-load industrial operations self-consume far more than offices or retail — which is exactly why factories, warehouses and cold stores get the best returns in UK commercial solar.
| Operating profile | Typical self-consumption | Best-fit funding / sizing |
|---|---|---|
| Single-shift (06:00–18:00, Mon–Fri) | 60–70% | CAPEX + AIA; modest battery |
| Two-shift / extended hours | ~75% | CAPEX; battery for shoulder-evening load |
| 24/7 continuous manufacturing | 80–90% | Larger array; export less relevant |
| Cold store / refrigerated logistics | ~85% | Oversize array + battery for peak-shaving |
Tax relief and capital allowances on industrial solar
For most industrial buyers the real "grant" is the tax treatment — but the mechanism matters, and it is the thing most pages on this topic get wrong. Since April 2012 HMRC has designated all capital expenditure on solar panels as special-rate expenditure (Capital Allowances Manual CA22335). Full Expensing is a 100% first-year allowance for main-rate plant, so it does not apply to solar PV. The 100% year-one route for solar is the Annual Investment Allowance (AIA) — £1,000,000 of qualifying spend per year, and AIA is available against special-rate expenditure, so most commercial solar projects get full relief in year one. Spend above the AIA cap (or where AIA is unavailable) attracts the 50% special-rate first-year allowance, with the balance going into the special rate pool and written down at 6% a year. The effective saving is unchanged: 100% relief at 25% corporation tax is still worth about 25% of capex. Worked saving below is on a £100,000 system at 25% corporation tax. Treat figures as indicative — your accountant should confirm against your specific tax position. Why Full Expensing does not cover solar.
| Relief | Eligibility | Worked saving (£100k system) | Notes |
|---|---|---|---|
| Annual Investment Allowance (AIA) | First £1m of qualifying plant per year; companies, sole traders and partnerships. AIA is available against special-rate expenditure, which is what solar PV is | £25,000 effective (25% CT) | The 100% year-one route for solar PV — most commercial solar projects sit under the £1m cap |
| Full Expensing (100% main-rate FYA) | New/unused MAIN-RATE plant only — not solar PV | Not available on solar PV | All capital expenditure on solar panels has been special-rate since April 2012 (HMRC Capital Allowances Manual CA22335), so Full Expensing does not apply — claim AIA instead |
| 50% First-Year Allowance (special-rate) | Special-rate expenditure, which includes all solar PV — used where spend exceeds the £1m AIA cap or AIA is unavailable | £12,500 year-1 + WDA on remainder | Balance goes into the special rate pool and is written down at 6% a year |
| 0% VAT on installation | Qualifying energy-saving materials (current relief) | ~£20,000 cash on a £100k net-of-VAT job | Removes the VAT cash-flow drag at install; treat as indicative — confirm current scope |
Grants for industrial solar — what's open vs closed in 2026
This is where our independence shows. Every other page on the SERP is selling an install, a panel or a tariff — none will tell you plainly which schemes have actually closed. So, honestly: the English IETF and PSDS Phase 4 are closed to new applications, and there is no "FETF 40%" grant for commercial solar — that figure gets repeated online but it is wrong. The grant-equivalent that genuinely applies UK-wide is the Annual Investment Allowance (AIA) plus 0% VAT; nation-specific grants sit on top. And one more correction while we are being honest: Full Expensing does not cover solar — solar panels are special-rate expenditure, so AIA is the 100% year-one route, with the 50% special-rate first-year allowance on spend above the £1m AIA cap. Grants run 25-40% by nation and most are windowed, so check status before you bank on them.
| Scheme | Nation | What you get | 2026 status | Best paired with |
|---|---|---|---|---|
| Annual Investment Allowance (AIA) | UK-wide | 100% of the first £1m in year one — ~25% effective tax relief at 25% CT | OPEN | Default; pair with 0% VAT + SEG/PPA |
| 50% special-rate first-year allowance | UK-wide | 50% in year one on spend above the AIA cap; balance in the 6% special rate pool | OPEN | For projects over £1m of qualifying spend |
| 0% VAT on install | UK-wide | VAT removed at point of install | OPEN | Stacks with AIA |
| English IETF | England | Was up to ~30% of eligible capex | CLOSED to new apps | Use AIA + PPA instead |
| PSDS Phase 4 | England (public sector) | Capital grant | CLOSED to new apps | Salix for public-sector estates |
| SIETF | Scotland | Grant toward industrial decarbonisation | OPEN | + Business Energy Scotland SME loan |
| Business Energy Scotland loan | Scotland (SME) | Interest-free/low-cost loan | OPEN | Cash-flow bridge alongside AIA |
| Welsh Industrial Decarbonisation | Wales | Grant support | OPEN | + Development Bank of Wales finance |
| Invest NI Capital Grants | Northern Ireland | Capital grant | OPEN | + AIA |
| Local Growth Fund | England (Mayoral areas) | Varies by combined authority | OPEN (area-specific) | Check your Mayoral Combined Authority |
| REPF (rural businesses) | England (rural) | Up to 40% of eligible capex | OPEN (windowed) | Rural industrial/farm-adjacent sites only |
| Smart Export Guarantee | UK-wide | Per-kWh export income (3.5–12p flat; more on dynamic) | OPEN | Revenue on every exported kWh |
Status is indicative for 2026 and grant windows open and close at short notice. We confirm live eligibility for your nation and site before you commit. See all UK commercial solar grants.
How to apply for industrial solar funding in 2026 — step by step
Applying for the right funding stack is our specialism. As an independent consultancy we take no installer commission, so the route we recommend is the one that nets you the most, not the one that pays us. The process:
- Confirm nation and ownership. Which nation the site sits in, and whether you own, head-lease or sublet the roof, decides which grants and allowances are open to you.
- Size the system and model self-consumption. We use your roof area and load profile to size the array and estimate self-consumption (60-90% for industrial sites).
- Run a CAPEX vs lease vs PPA comparison. We model buying outright versus asset finance versus a power purchase agreement so you can see the net position of each.
- Claim the Annual Investment Allowance and 0% VAT. Solar PV is special-rate expenditure, so the 100% year-one route is AIA — the first £1m of qualifying spend, worth roughly 25% of capex at 25% corporation tax — not Full Expensing, which is main-rate plant only. Above the £1m cap, the 50% special-rate first-year allowance applies with the balance in the 6% pool. 0% VAT removes the install VAT drag.
- Add nation-specific grants where eligible. SIETF and Business Energy Scotland (Scotland), Welsh Industrial Decarbonisation and Development Bank of Wales (Wales), Invest NI (NI), Local Growth Fund (Mayoral areas) or REPF (rural businesses up to 40%).
- Lock in the best SEG export contract. We sign you onto the highest-paying Smart Export Guarantee tariff your site can access — up to about 12p/kWh on the leading flat tariffs, and more on dynamic half-hourly tariffs where you have battery storage to shift export into peak windows — for income on every exported kWh.
Start with a free funding review — we confirm eligibility, model the stack, and assemble the application on your behalf.
Worked payback build-up — 800kWp industrial system
A transparent £ build-up for a representative UK manufacturer (2.4 GWh/year demand, ~4,200 m² roof). This is the full stack — capex, tax relief, the VAT saving, year-one savings and export income — rather than a single headline number. Figures are indicative and site-specific.
| Line | Value |
|---|---|
| Headline turnkey capex (800 kWp) | £580,000 |
| Less: Annual Investment Allowance relief (25% effective) | −£145,000 |
| Less: 0% VAT at install (vs 20%) | −£116,000 cash saved |
| Net effective capex | ~£435,000 |
| Year-1 self-consumption saving (electricity displaced) | £128,000 |
| Year-1 SEG export income | £20,000 |
| Total year-1 benefit | £148,000 |
| Indicative payback | ~2.9 years (CAPEX) / 4–6 yrs incl. structural |
| 25-year cumulative net benefit (CPI-adjusted) | £4.8m+ |
Industrial solar — two worked models
These are illustrative models, not client projects. We publish the assumption behind them so you can check the arithmetic against your own roof: both assume 950 kWh per kWp per year, a reasonable central UK figure for an unshaded south-facing industrial roof at a 10–15° pitch. Your own yield will move with latitude, pitch, orientation and shading — the funding review returns a figure calculated for your site rather than a generic one.
| Model | System | Annual generation | Typical demand met | Indicative payback | Funding route |
|---|---|---|---|---|---|
| Mid-size manufacturing unit | 800 kWp (~1,760 panels) | ~760,000 kWh | ~38% of demand | ~3 yrs | CAPEX + AIA |
| Large distribution warehouse | 1.6 MWp (~3,520 panels) | ~1,520,000 kWh | ~45% of demand | Zero capex (PPA) | PPA @ 5.4–6.4p/kWh |
Demand-met percentages assume a daytime-weighted industrial load profile; a single-shift site with no weekend running will self-consume less, and a 24/7 site more. Payback is shown on capex net of the year-one allowance, before any export income.
Solar panels on industrial buildings: roof, structural and load realities
Will your industrial roof take solar? The honest answer depends on the roof type. Solar adds 12-15 kg/m² of permanent dead load, so the structural question — not the electrical one — is usually what decides feasibility and cost. The matrix below is the depth that thin installer pages skip.
| Roof type | Added dead load | Typical fixing | Survey requirement | Notes |
|---|---|---|---|---|
| Modern composite (post-2000) | +12–15 kg/m² | Non-penetrative clamp to standing seam / trapezoidal clip | Desktop check usually sufficient | Rarely needs reinforcement |
| Pre-2000 steel portal frame | +12–15 kg/m² | Mechanical fix to purlins; may need added purlins/bracing | Structural engineer sign-off required | Reassess snow load in Scotland/Pennines/NE; bracing £8k–£25k |
| Asbestos-cement (1970–1985) | n/a until re-roof | No drilling permitted (HSE) | Asbestos survey + re-roof plan | Replace roof under separate capital programme, then mount PV |
| Standing-seam metal | +12–15 kg/m² | Non-penetrative seam clamp (warranty-safe) | Desktop + seam spec check | Often the cleanest install |
| Flat / single-ply membrane | +15–25 kg/m² (ballast) | Ballasted or mechanically fixed; membrane warranty check | Structural + wind-uplift calc | Ballast adds dead load — verify capacity first |
Funding routes compared: CAPEX vs lease vs PPA
No installer or energy supplier will lay these three routes out neutrally — each is incentivised toward one. As an independent funding specialist, this comparison is the whole point of the page. Which route wins depends on your balance sheet, tax position and roof tenure.
| Route | Upfront cost | Who owns the asset | Who claims allowances | Savings retained | Contract length |
|---|---|---|---|---|---|
| CAPEX (buy outright) | Full capex upfront | You own the asset | You claim AIA (and the 50% special-rate FYA above the £1m cap) | Keep 100% of savings + SEG | n/a — asset is yours |
| Operating lease / asset finance | Low/none upfront | Financier owns until end of term | Lessor typically claims; you deduct rentals | Savings net of lease rental | 5–10 years typical |
| PPA (power purchase agreement) | Zero capex | PPA provider owns the system | Provider claims allowances | Buy solar power at 5.4–6.4p/kWh | 15–25 years |
Solar panels for industrial units and multi-let estates
Solar panels for industrial units on a business park or multi-let estate work as well as on a single large factory — the physics are identical, with 75-90% self-consumption and a 4-6 year payback after AIA and 0% VAT. What differs is the commercial structure. On a multi-let estate the questions are: who owns the roof (freeholder, head-lessee or the occupier), how long each lease runs, and whether a landlord-funded array with tenant off-take beats each unit buying its own. We model estate-wide and single-unit options side by side so landlords and occupiers can see who funds, who benefits and how the SEG and savings split. Warehousing & logistics guide.
Industrial rooftop solar — yield, self-consumption and array layout
Industrial rooftop solar yields roughly 850-950 kWh per kWp per year in southern England, 800-900 in the Midlands and north, and 750-850 in Scotland. Large, unobstructed industrial roofs give you a layout advantage offices and retail units lack: you can orient arrays east-west to spread generation across the working day rather than spiking at noon, which lifts the share you self-consume against a flat industrial load. Performance is driven far more by usable roof area, pitch and shading than by latitude — a well-laid-out roof in Glasgow can out-generate a cluttered one in Kent.
Battery storage for industrial solar — peak-shaving and DUoS avoidance
For industrial sites with evening or 24/7 process loads, adding battery storage lifts ROI beyond solar alone. A battery captures generation that would otherwise be exported at 5-12p on a flat tariff and redeploys it against the ~22-28p grid price — and on half-hourly commercial tariffs it shaves the triad/DUoS red-band peaks (typically 16:00-19:00 winter weekdays) where unit and capacity charges are highest. Typical industrial sizing is 0.4-0.8 kWh of storage per kWp of PV; a 200kWh battery on a 500kWp array adds roughly £80,000-£200,000 of capex but can cut the payback on the combined system for high-evening-load operations. Full battery analysis.
Industrial solar and MEES/EPC: why 2026 is the deadline to act
For industrial landlords and owner-occupiers there is a regulatory clock running alongside the financial case. Minimum Energy Efficiency Standards (MEES) set a rising minimum EPC band for commercially let property, and the trajectory tightens through the late 2020s — sub-standard industrial units risk becoming unlettable, with rental value and capital value following the EPC band down. A rooftop PV array lifts the building's EPC rating and, on an owned system, improves net operating income — both of which protect asset value. Acting in 2026 lets you bank AIA and 0% VAT while they apply and stay ahead of the minimum-EPC trajectory rather than scrambling against a deadline. This EPC/MEES driver is high-intent and almost entirely absent from the installer and utility pages you will have read elsewhere.
Industrial building solar FAQs
Are solar panels good for industrial buildings?
What size solar PV does an industrial building need?
Can pre-2000 industrial portal-frame buildings host solar panels?
What grants are available for industrial building solar in 2026?
How do DNO costs affect industrial solar economics?
Should I add battery storage to an industrial solar system?
Are there planning permission issues for industrial solar?
Can I put solar panels on a small industrial unit on a business park?
How well does industrial rooftop solar perform in the UK climate?
How much do solar panels for industrial buildings cost in 2026?
How much do solar panels cost for an industrial unit?
How many solar panels fit on an industrial roof?
Are solar panels worth it for industrial buildings?
Can my industrial roof take solar panels?
What grants are available for industrial solar in 2026?
How do I apply for industrial solar funding?
Do solar panels increase an industrial property's value?
Solar panels for industrial units
On a light-industrial unit the deciding factor is rarely the roof — it is which meter the array sits behind. Units on a multi-let estate typically hold their own MPAN, and an array wired behind it displaces power the occupier is already buying at the full delivered rate. An array wired into the landlord's common-parts supply meets only estate lighting, gates and pumps, so most of the generation spills to export and earns whatever export tariff the site has signed up to — currently 12p/kWh flat on Octopus Outgoing Fixed.
| Array sits behind | What it displaces | Where the value lands |
|---|---|---|
| The occupier's own unit MPAN | The unit's full import bill | Mostly bill savings |
| The landlord's common-parts MPAN | Lighting, gates, pumps only | Mostly export at 12p |
| A private wire serving several units | Several occupiers' import | Split by supply agreement |
Selling that output on to occupiers is a supply of electricity, and whether it needs a supply licence turns on exactly what you are selling. The Class A "small supplier" exemption in Schedule 4 of the Electricity (Class Exemptions from the Requirement for a Licence) Order 2001 covers persons, other than licensed suppliers, who supply no electricity except electricity they generate themselves, and who do not at any time supply more than 5 megawatts of electrical power, of which no more than 2.5 megawatts goes to domestic consumers. An estate-scale rooftop array sits comfortably inside that megawatt limit — but it is the self-generation condition that catches landlords out. The moment you also resell imported grid power to top occupiers up, Class A no longer fits, and you are looking instead at the separate Class B (resale) or Class C (on-site supply) exemptions in the same Schedule. Work out which class you are in before you price the arrangement, not after.
The year-one tax position is narrower than most unit owners expect. Solar PV has been special-rate expenditure under CAA01 s104A since 1 April 2012 for corporation tax (HMRC Capital Allowances Manual CA22335), and full expensing is a main-rate first-year allowance, so it does not reach solar. The 100% year-one route is the Annual Investment Allowance — £1 million a year, which HMRC confirms at CA23084 may be claimed on integral features and other special rate expenditure. Above the cap, companies can claim a 50% first-year allowance on new and unused special-rate plant, with the balance written down at 6% a year. At the 25% main rate of corporation tax, AIA returns roughly 25p of tax for every £1 of capex — and it follows ownership. Whoever incurs the expenditure claims it, which makes the landlord-or-occupier question a tax decision as much as a lease one.
Budget the VAT line on the building, not on the technology. The zero rate for installing energy-saving materials runs from 1 May 2023 to 31 March 2027 and then reverts to the 5% reduced rate from 1 April 2027, but HMRC scopes that relief to residential accommodation and to buildings used solely for a relevant charitable purpose (VAT Notice 708/6) — so establish how your unit is treated before you assume the VAT comes off the capex. Read that alongside the rest of the 2026 funding stack, or ask for a written funding note on your unit.
Who claims the tax relief on solar panels for an industrial unit — the landlord or the tenant?
Can a landlord sell solar power to tenants on an industrial estate?
Do solar panels on an industrial unit qualify for the Smart Export Guarantee?
See which grants your business qualifies for — free 20-minute funding review.
Tell us your sector, roof size and energy spend. We come back within one working day with a shortlist of grants and the realistic capex you can expect to recover.
No obligation. We don't charge for grant scoping.
Funding by asset class
The allowance depends on the asset, and most pages on this topic get it the wrong way round. Solar PV is special-rate expenditure (HMRC Capital Allowances Manual CA22335), so the 100% year-one route is the Annual Investment Allowance — Full Expensing is a main-rate measure and does not reach it. Battery storage, EV charging and heat pumps are main-rate plant, so Full Expensing genuinely does apply to those.
- commercial heat pump costs and payback
Main-rate plant, so Full Expensing does apply here.
- financing commercial battery storage
Main-rate plant. Stacks with solar for self-consumption.
- commercial solar pricing by system size
Capex bands per kWp before any relief.
- the Annual Investment Allowance explained for solar
Solar is special-rate, so AIA is the 100% year-one route.
Find out which 2026 schemes your site actually qualifies for
- 1. A short written funding note naming every scheme your site qualifies for in 2026 — and the ones it does not.
- 2. Indicative system size and a capex band for your roof.
- 3. Year-one tax treatment per asset in £ — solar is special-rate expenditure, so the route is the Annual Investment Allowance; battery storage and heat pumps are main-rate plant, where Full Expensing does apply. Most pages get this the wrong way round.
- 4. Projected SEG export revenue at current rates.
- 5. Any red-flag eligibility or DNO issues we can see up front.
Covers solar PV, battery storage, EV charging and commercial heat pumps — separately or as one bundled project. If your project is a heat pump or a battery rather than a roof, say so in the message box and the note is written against that asset instead.
- · We do not pass your details to multiple installers.
- · We do not run a lead auction, and we never ask for your phone number.
- · No marketing lists, no unsolicited calls.
- · We are an independent funding consultancy — not an installer, and we take no installer commission.
Solar by building type
The sizing, structural and funding realities of solar PV on each kind of commercial and industrial building.
Pillar guideSolar panels for commercial buildingsThe building-by-building guide and funding stack.