Solar Canopy EV Charging Integration

EV canopy cost: the three budgets

What chargepoints cost: the official benchmarks

The most recent published government cost assumptions for non-domestic chargepoints are in the Department for Transport's final cost-benefit analysis for the zero emission vehicle mandate (October 2023). They are central modelling assumptions built from earlier studies, not quotes, and they give no kilowatt rating or price year.

Older figures are still quoted and should be read with their dates. A March 2022 DfT impact assessment, using 2021 prices, estimated £1,200–£4,000 hardware and £250–£900 installation to replace a broken 3–22 kW AC public chargepoint, and £20,000–£53,000 hardware and £1,000–£22,000 installation to replace a DC rapid. The same assessment put a contactless payment terminal at £900–£1,100 per chargepoint and annual maintenance contracts at £200–£360 for a non-rapid and £550–£800 for a rapid. Replacement units on existing sites avoid most groundworks, which is why those installation figures sit so far below the 2023 modelling.

No government source we found gives a 2024–2026 fully installed price for a 22 kW workplace charger, or a typical grid upgrade cost for a business car park. Treat any single "per bay" figure as a starting point for questions, not a budget.

Charger types and what they need

The Workplace Charging Scheme in 2026

The Workplace Charging Scheme (WCS) is the grant that applies to most EV canopy projects. Its current rules:

• Up to £500 per socket for installations completed from 1 April 2026, whenever the application was made (it was £350).
• Capped at 75% of purchase and installation costs, including VAT, and 40 sockets across all of an applicant's sites — a running total, so later vouchers count towards it.
• Open to businesses, charities, public sector organisations and small accommodation businesses in England, Wales, Scotland and Northern Ireland. State-funded education institutions have a separate strand at up to £2,000 per socket.
• The applicant's chosen installer must be OZEV-authorised; it claims the grant and deducts it from the invoice. Units must be on the approved commercial chargepoint list and carry a 3-year on-site warranty on parts and installation.
• A voucher lasts 180 days: the chargepoints must be installed and the grant claimed within that time.
• It cannot fund chargepoints that were a mandatory requirement, such as those required by the Part S building regulations or by a planning condition.
• Extended for a final year to 31 March 2027; the government can end or change it sooner, aiming to give four weeks' notice.

Worked example. Ten twin-socket posts give 20 sockets. The grant is the lower of 75% of the eligible cost and 20 × £500 — so at most £10,000. At the DfT's modelled £8,038 per workplace chargepoint, ten posts come to £80,380 before grant, and the per-socket cap, not the 75% limit, is what binds. The 40-socket ceiling limits the scheme to £20,000 per applicant in total.

The staff and fleets infrastructure grant, the commercial landlord chargepoint grant and the residential landlord infrastructure grant all closed on 31 March 2026 — quotes that still deduct them are out of date. By 1 July 2026 the scheme had funded 72,388 sockets since late 2016, 8,047 of them in the previous twelve months. The eligibility detail, including what a business can and cannot do with WCS-funded chargers, is in our guide to claiming the Workplace Charging Scheme under a solar canopy.

Tax: two different allowances under one canopy

The chargers. Businesses of all sizes can claim a 100% first-year allowance on capital spending on plant or machinery for an EV charging point, on spending by 31 March 2027 for corporation tax or 5 April 2027 for income tax (end dates moved by the Finance Act 2026). It can include altering land only to install the chargepoint and equipment installed only to supply it with electricity. The equipment must be new and unused, and plant bought to lease out is excluded.

The solar array. Solar panels are special rate assets and cannot claim full expensing. Their route is the Annual Investment Allowance — 100% in year one up to £1 million a year — and, above that, the 50% special rate first-year allowance for companies. Whether the canopy's steel structure qualifies as plant is a question for your tax adviser; we found no HMRC guidance that addresses canopies directly. The 130% super-deduction some older guides mention ended on 31 March 2023.

Grid connection: the cost that decides the project

Most lower-powered chargepoints can run from a building's existing connection; higher-powered charging may need a new connection or an upgraded site supply, and several rapid chargers may need a new substation. Three rules shape what that costs:

• Connection boundary. Since 1 April 2023, Ofgem's reforms mean a demand customer pays for its own sole-use connection assets but no longer pays for wider network reinforcement, with limited exceptions.
• High-cost cap. Above £1,720 per kVA, the connecting customer pays reinforcement costs in full.
• Standing charges. The Office for Zero Emission Vehicles reported in December 2024 that standing charges for EV charging sites had significantly increased, because sites are now charged for installed capacity rather than usage. A proposed industry change to give public charging sites lasting relief (DCP 454) was still at working-group stage in July 2026.

This is where the solar canopy earns part of its keep. The Department for Energy Security and Net Zero says on-site generation could reduce the size of a car park's grid connection request, depending on the capacity of the chargepoints and the solar installation, when the site's maximum demand falls, and any battery storage. Battery storage can be an alternative to a costly connection upgrade, at significant upfront cost. The array itself needs a G99 application to the network operator, because every commercial canopy is above 16 A per phase.

How much of the charging the canopy can supply

A canopy is usually built at a shallow pitch. At 10°, the European Commission's PVGIS model gives about 920 kWh per kWp a year in London, 875 in Birmingham and 772 in Glasgow. Each 100 kWp of canopy therefore produces roughly 92,000 kWh a year in London, 87,500 in Birmingham and 77,200 in Glasgow — before shading.

The output is seasonal: at the same pitch, London's December yield is about 21.6 kWh per kWp against about 128 in June. A canopy supplies daytime charging well from spring to autumn — staff cars parked through the working day are the natural match — but overnight fleet charging and winter demand will come mostly from the grid. Size the connection for the winter evening, not the summer noon.

Staff-only or public: how the choice changes cost

Deciding who can use the chargers affects the grant, the regulations and the VAT:

• Grant. A business's WCS-funded chargers are for its staff and fleets only. Public authorities, charities and small accommodation businesses may let anyone use them.
• Regulations. Chargers open to the public — including in private car parks such as supermarkets and hotels — fall under the Public Charge Point Regulations 2023: contactless payment on new public chargepoints of 8 kW and above (free-to-use chargers excepted), prices shown in pence per kWh, open data and a free 24/7 staffed helpline, and 99% average reliability across an operator's rapid network, with penalties of up to £10,000 per chargepoint. Micro-business operators only have to follow the pricing rule. Staff-only bays never open to the public are outside these rules.
• VAT. Electricity sold through public chargepoints is standard-rated whatever the quantity — HMRC still applies that while it seeks permission to appeal the Charge My Street tribunal decision — and the temporary 0% rate on qualifying electricity from 1 October 2026 does not change it.

On business rates, England's 100% relief for EV charging points applies only to separately assessed charging properties; bays inside a larger rated property without their own rateable value do not qualify. More in our guide to how business rates treat canopies and chargers.

Planning for the canopy and the chargers

In England a canopy over non-domestic parking is permitted development under Class OA after a prior approval application, and charging posts up to 2.7 metres have their own rights under Part 2 — covered in our guide to the Class OA planning rules. The EV-specific points, including why a planning condition that requires chargers can cost you the grant, are in our article on EV canopy planning permission.

What to ask for in an EV canopy quote

1. 1

   Canopy structure and solar array as separate lines, with the design wind and snow loads and who signs off the structure.

2. 2

   A charger schedule: number of posts, sockets per post, power rating, whether each unit is on the approved WCS list, and the warranty terms.

3. 3

   Groundworks and cabling to the bays as their own line.

4. 4

   The connection: the site's existing capacity, the load management assumed, and whether a new or upgraded supply is needed — with the DNO's response if one exists.

5. 5

   Grant applied, with the socket count and the applicant category, and confirmation that nothing funded is required by a planning condition.

6. 6

   Annual costs: maintenance, back-office software and the standing charge implications of any capacity increase.

EV canopy cost: questions

For how charger layouts and canopy formats fit together, see our guide to EV charging and solar canopy combinations.

Sources

All checked on 17 September 2026.

• DfT — ZEV mandate final cost-benefit analysis (October 2023), Table 31
• DfT — impact assessment, Public Charge Point Regulations (March 2022)
• Find a Grant — Workplace Charging Scheme, guidance for installers and changes from 1 April 2026
• WCS for state-funded education institutions
• EV charging infrastructure grant statistics, 1 July 2026
• HMRC Capital Allowances Manual CA23156 and full expensing guidance
• Ofgem — Access SCR final decision and OZEV — improving the grid connection process
• DESNZ — solar on car parks and EV charging call for evidence
• Public Charge Point Regulations 2023 guidance
• HMRC VAT Notice 701/19
• PVGIS 5.3, European Commission Joint Research Centre