Commercial Solar Carport Cost UK 2026
Real, current commercial solar carport pricing. Updated for 2026 with post-energy-crisis steel and panel costs. Turnkey range £950-£1,300/kWp installed for projects 100 kWp-2 MWp — after AIA, effective capex drops 20-25%.
Headline: £950-£1,300 per kWp Installed
UK commercial solar carport projects in 2026 cost between £950 and £1,300 per kWp installed, all-inclusive of design, planning, structure, panels, inverters, AC commissioning and MCS certification. Excluded: EV chargers (£1,200-£3,200 per socket extra), battery storage, and DNO contribution if grid reinforcement is needed.
Full Capex Range by System Size
| System size | Approx. spaces | Turnkey capex | Annual yield | Annual saving | Simple payback | After-AIA payback |
|---|---|---|---|---|---|---|
| 75 kWp | 50 | £95k-£115k | ~64,000 kWh | £28k-£32k | 3.0 yr | 2.2 yr |
| 150 kWp | 100 | £165k-£195k | ~127,500 kWh | £56k-£64k | 2.7 yr | 2.0 yr |
| 225 kWp | 150 | £240k-£280k | ~191,000 kWh | £82k-£92k | 2.6 yr | 1.9 yr |
| 300 kWp | 200 | £290k-£345k | ~255,000 kWh | £112k-£125k | 2.5 yr | 1.9 yr |
| 450 kWp | 300 | £425k-£500k | ~382,000 kWh | £170k-£190k | 2.5 yr | 1.8 yr |
| 500 kWp | 330 | £465k-£545k | ~425,000 kWh | £190k-£210k | 2.4 yr | 1.8 yr |
| 750 kWp | 500 | £665k-£775k | ~637,500 kWh | £285k-£320k | 2.4 yr | 1.8 yr |
| 1,000 kWp | 670 | £865k-£1.02m | ~850,000 kWh | £375k-£420k | 2.3 yr | 1.7 yr |
| 1,500 kWp | 1,000 | £1.27m-£1.5m | ~1,275,000 kWh | £560k-£640k | 2.3 yr | 1.7 yr |
| 2,000 kWp | 1,330 | £1.65m-£1.95m | ~1,700,000 kWh | £745k-£855k | 2.2 yr | 1.7 yr |
Assumptions: 850 kWh/kWp annual yield (UK midlands average), 75% self-consumption at 47p/kWh, 25% export at 7p/kWh SEG. Excludes optional EV chargers and battery storage.
What's Included in the Turnkey Price
- Free initial feasibility study (visit, structural assessment, indicative ROI)
- Full architectural and structural design
- Planning application and management (including any planning committee attendance)
- DNO G99 application and grid connection (excludes any DNO-required upstream reinforcement)
- Site preparation and traffic management
- Foundations (pad-and-screw or pile, depending on ground conditions)
- Steel carport structure (CE marked, EN 1090-2 Execution Class 2)
- Tier-1 monocrystalline bifacial PV panels (Trina, JA Solar, Longi, JinkoSolar)
- String or optimiser-string inverters (SMA, SolarEdge, Sungrow)
- DC and AC cabling, switchgear and protection
- MCS certification
- Commissioning, customer training and 24-month workmanship warranty
- Monitoring portal access
What Sits Outside the Turnkey Price
- EV chargers: £1,200-£3,200 per 7-22 kW AC socket; £4,500-£12,000 per 50-150 kW DC rapid
- Battery storage: £450-£700 per kWh storage capacity (typical 100-500 kWh systems)
- DNO upstream reinforcement: site-specific; typically £0 for sites under 500 kVA, but can reach £100k+ for sites needing 11 kV transformer upgrade or feeder reinforcement
- VAT: 20% on commercial PV (note: domestic carports are zero-rated until March 2027)
- O&M: optional 25-year wrap from £8-£12/kWp/year
Where Your Money Goes (typical 300 kWp project, £290k)
| Component | £ band | % of total |
|---|---|---|
| Panels (~518 × 580W bifacial) | £60,000-£70,000 | 21% |
| Inverters (3 × 100 kW string) | £18,000-£24,000 | 7% |
| Carport structure (steel, foundations) | £105,000-£125,000 | 40% |
| Electrical (DC, AC, switchgear) | £30,000-£40,000 | 12% |
| Design, planning, project management | £25,000-£35,000 | 10% |
| Site prep, mobilisation, commissioning | £20,000-£30,000 | 8% |
| Contingency | £8,000-£12,000 | 3% |
After-Tax Payback: Why the AIA Matters
Most UK businesses can claim 100% Annual Investment Allowance (AIA) on solar plant and machinery — currently a permanent £1m allowance per company group. On a £290,000 carport, AIA writes the entire amount off against corporation tax in year one. At a 25% effective tax rate, that's £72,500 of corporation tax saved. The after-tax effective capex is £217,500, not £290,000 — which drops payback from ~2.5 years to ~1.9 years.
VAT on Solar Carports
Commercial solar PV (including carports) attracts standard 20% VAT, which is recoverable for VAT-registered businesses (the headline £950-£1,300/kWp figure is ex-VAT). Domestic solar carports are zero-rated under VAT Notice 708/6 until 31 March 2027.
Finance and PPA Pricing
For clients who prefer not to deploy capital: asset finance typically costs 7-9.5% APR over 5-7 years. PPAs typically price at 14-18p/kWh fixed for 15-25 years (vs current grid retail 38-52p/kWh). PPAs require zero upfront capex but the buyer foregoes the AIA tax benefit and the 25-year residual value of the asset.
Carport Installation Cost: Structure-Only vs Solar Carport
Buyers often weigh a plain steel carport against a solar carport. A non-solar commercial steel carport (canopy and foundations, no PV) typically costs £1,800-£3,200 per parking bay for the structure alone. Adding the solar layer — Tier-1 bifacial panels, inverters, DC/AC electrical and MCS commissioning — takes the all-in carport installation cost to roughly £3,800-£5,800 per bay (about £950-£1,300/kWp at 1.5 kWp per bay). The decisive difference: a structure-only carport is pure cost, whereas a solar carport repays its installation cost through 25 years of generation.
| Per parking bay (single-deck) | Structure only | Solar carport |
|---|---|---|
| Steel canopy + foundations | £1,800-£3,200 | included |
| Solar panels + inverters + electrical | — | £2,000-£2,600 |
| Total carport installation cost / bay | £1,800-£3,200 | £3,800-£5,800 |
| 25-year net position / bay | cost only | net positive (energy + AIA) |
Looking at carport solar panels cost in isolation — the PV layer added on top of the canopy — works out at roughly £600-£700 per panel installed (panel, mounting and a share of inverter and cabling), or about £2,000-£2,600 per parking bay. For a 200-bay car park that is around £400,000-£520,000 of solar on top of the structure, generating roughly 255,000 kWh a year.
Free Quote — Within 48 Hours
For an accurate fixed-price quote for your specific site, send through your postcode, approximate parking bay count, and a brief site description. We'll come back with indicative system size, capex range, annual saving and payback inside 48 working hours.
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Solar Carport Cost Per Bay
Most cost guides quote a single per-kWp number and stop. Because a commercial car park is sold in parking bays, the figure buyers actually need is cost per bay. At the typical 1.5 kWp per parking bay, an all-in solar carport (steel canopy, foundations, Tier-1 bifacial panels, inverters, DC/AC electrical and MCS commissioning) works out at roughly £3,800–£5,800 per bay, equivalent to the headline £950–£1,300 per kWp installed. On typical commercial tariffs (around three-quarters of generation self-consumed, the rest exported at SEG rates), the annual saving lands at around £560–£640 per bay per year. Figures are typical estimates and depend on your tariff and load profile.
| System size | Approx. bays | Cost per bay (all-in) | Cost per kWp | Annual saving / bay |
|---|---|---|---|---|
| 75 kWp | 50 | £3,800–£5,800 | £950–£1,300 | ~£560–£640 |
| 150 kWp | 100 | £3,800–£5,800 | £950–£1,300 | ~£560–£640 |
| 300 kWp | 200 | £3,800–£5,800 | £950–£1,300 | ~£560–£625 |
| 450 kWp | 300 | £3,800–£5,800 | £950–£1,300 | ~£560–£630 |
| 750 kWp | 500 | £3,800–£5,800 | £950–£1,300 | ~£560–£640 |
Cost per bay stays broadly flat as projects scale, while the saving per bay holds steady — so a 200-bay retail park scheme of around £285k–£390k could return roughly £112k–£125k a year on current commercial tariffs. Figures are typical estimates, ex-VAT, and exclude optional EV chargers and battery storage. Get a per-bay quote for your car park.
What Drives Solar Carport Cost Up or Down
The £950–£1,300/kWp band is wide because site conditions move the number. These are the seven drivers that decide where a project lands, and where the savings sit.
| Cost driver | Effect on price |
|---|---|
| Ground conditions | Good ground takes pad-and-screw foundations; soft, contaminated or made ground needs piled foundations — typically the single biggest swing on the structure line. |
| Span and bay layout | Wider clear spans and double-deck canopies use more steel per bay; simple single-deck runs over standard bays are the most economical per kWp. |
| EV charging integration | EV chargers add roughly £1,200–£3,200 per 7–22 kW AC socket (or around £4,500–£12,000 per 50–150 kW DC rapid). Specifying EV-ready DC stubs at build avoids costly retrofit trenching later. |
| Grid reinforcement (DNO) | Often minimal under 500 kVA, but an 11 kV transformer or feeder upgrade can add £100k or more. This is usually the largest single unknown — resolved early via the G99 application. |
| Panel tier | Tier-1 monocrystalline bifacial panels add a few percent of yield versus standard mono, lifting both cost and lifetime return per bay. |
| Access and phasing | Keeping a car park trading during works (out-of-hours, phased zones, traffic management) costs more than a closed-site build. |
| Funding route | The Annual Investment Allowance (100% first-year relief up to £1m) cuts effective capex by roughly a fifth to a quarter; PSDS, Salix and the OZEV Workplace Charging Scheme reduce net cost further for eligible bodies. |
Ground, span and grid are where quotes diverge most, so an accurate fixed price always follows a site survey. Request a free feasibility study to pin your number.