EV-Charging Solar Canopies: Solar canopy installers

EV-Charging Solar Canopies: Why the Charger and the Panels Belong on the Same Structure

An EV-charging solar canopy is the one canopy type where the economics stop being about a long payback and start being about arbitrage. Every other canopy sells power at, or below, the grid rate — you self-consume it or you export it under the Smart Export Guarantee for a modest 1–15p per kWh. Put a charger underneath, and the same solar electricity you generate for around 10p per kWh is now displacing — or being resold at — the 30–47p per kWh a driver would otherwise pay the grid. That gap is the profit engine, and it is why an EV-charging canopy typically pays back in about 7 years, the fastest of any canopy configuration we build, against 8–12 years for a solar-only structure.

The unique load profile is what makes it work. A car park with chargers has demand exactly when the sun is up: staff plug in on arrival, customers charge while they shop, fleet vehicles top up between shifts. A canopy generates on that same daytime curve, so a high proportion of your generation is self-consumed straight into a charging cable rather than exported at a fraction of the value. Self-consumed solar is worth roughly twice exported solar, and under a canopy that ratio tips heavily toward self-consumption because the load sits directly beneath the array.

Being honest about AC versus DC — the one thing most sellers won't tell you

Here is the limit we flag up front rather than bury: a solar canopy powers 7kW and 22kW AC charging beautifully. It does not power standalone 50kW+ DC rapid chargers. A rapid charger draws more instantaneous power than any roof-sized array can supply — a single 50kW unit would soak up the entire output of a mid-sized canopy and still demand grid import. So we size the solar to AC charging and lighting, and if you need rapid charging on the site, that runs off the grid plus a battery buffer. Anyone promising you solar-powered rapid chargers under a canopy is selling you a fantasy. The realistic, high-value match is destination and workplace AC charging, where dwell times are long, cars sit for hours, and a smart charger can prioritise free solar over paid grid import all day.

Sizing an EV-charging canopy

This sub-vertical sizes differently from a pure generation canopy. Rather than maximising panels per bay, you size the array to the charger load: as a working rule, roughly 1 kWp of panels per 7kW AC charger, scaled by how many chargers run simultaneously and how much of the day they draw. A modest workplace scheme might be a 20 kWp array feeding a handful of sockets; a large retail or fleet site runs up to a 500 kWp array with dozens of chargers. Across the range we build these from around 45 to 1,110 panels, generating roughly 18,000 to 460,000 kWh a year at the UK yield of ~900–950 kWh per kWp (750 in the far north of Scotland, up to 1,050 on the south coast). Bifacial modules recover an extra 5–12% from light reflected off pale tarmac beneath the array — worth having under a canopy where the surface below is open.

The standard geometry still applies: about 2 kWp sits over a single bay (four to six 450W panels across roughly 12 sqm), with panels at a low 5–15° tilt to manage wind uplift. A back-to-back double-sided canopy can push that toward 4 kWp per bay. But the design driver here is the charging schedule, not the footprint — we model your expected charging demand against the solar curve, then add a battery where it pays to shift midday surplus into the evening charging peak.

A worked cost and payback example

The canopy structure across this sub-vertical runs from about £50,000 to over £1,000,000, with the chargers costed on top of that. As with every elevated canopy, the steel and foundations are roughly 45% of the total, so the price per kWp falls sharply as you add bays — a big scheme is far better value per kWp than a small one. Take a mid-sized workplace example. A 60-bay office car park installs a 120 kWp canopy at commercial rates of £900–£1,400 per kWp, so roughly £110,000–£165,000 for the structure and PV, or about £6,000–£12,000 per bay covered. That array generates around 108,000–114,000 kWh a year in a typical UK location.

Now layer in the charging economics. If two-thirds of that generation is self-consumed into AC chargers and daytime building load — displacing grid electricity at, say, 35p per kWh instead of exporting at a few pence — you are avoiding purchase of around 75,000 kWh at 35p, worth roughly £26,000 a year, plus SEG income on the surplus and the value of the charging service to staff. Against a mid-point capital cost, that lands the blended payback in the region of 7 years, and the charging layer alone frequently pays for itself in 2–3 years. For context, DESNZ estimated in May 2025 that an 80-space car park could save around £28,000 a year on electricity through self-consumption — figures that line up closely with what we model. Every figure here is illustrative and site-dependent; we model your actual half-hourly demand before we quote. Our published solar canopy cost guide breaks the per-kWp and per-bay ranges down further.

Compliance and the connection — the two things that set the timeline

The array and the chargers are connected together behind your meter, so the DNO application is sized to the combined load, not the panels alone. In England the structure itself normally falls under Class OA permitted development — the permitted-development right in force since 21 December 2023 that covers solar canopies over non-domestic off-street parking. That means a prior-approval application on siting, design and glare rather than full planning permission, provided no part exceeds 4m high, the canopy sits more than 10m from any dwelling, and you meet the SuDS run-off condition over permeable surfaces. Listed buildings and scheduled monuments are excluded, and work must start within three years. Note that Class OA is England only — in Wales, Scotland and Northern Ireland a canopy still needs standard planning permission.

The grid connection is usually the longest lead item. Almost every EV-charging canopy exceeds the G98 fit-and-inform threshold of 3.68kW per phase, so it needs a G99 pre-approval application to the DNO — typically 4–8 weeks, sometimes 8–12. We lodge that early, on day one, because it runs in parallel with the paperwork rather than after the steel is up. Everything is engineered to Eurocode wind and snow loads (BS EN 1991), built under CDM 2015, and wired to BS 7671, with MCS certification so you can claim the Smart Export Guarantee on exported surplus.

The funding angle specific to this buyer

The charger layer has its own grant. The Workplace Charging Scheme is open to 31 March 2027 and covers up to 75% of socket cost, capped at £500 per socket (£2,000 for state-funded education), for up to 40 sockets — but only through an OZEV-authorised installer, which we are. That offsets the charging layer that sits on top of the canopy cost. Be aware the separate staff-and-fleets EV infrastructure grant closed to new applicants on 31 March 2026, so it is no longer a route.

On the PV side, the same business incentives apply as any commercial canopy: 100% relief on up to £1m of investment a year through the Annual Investment Allowance, plus the 50% first-year allowance on the balance. One correction we make often — solar is a special-rate (integral features) asset and is excluded from 100% full expensing, so ignore anyone who tells you it qualifies. The generation plant is also exempt from business rates in England to 31 March 2035, and export earns income under the SEG. Our grants and funding guide maps every live route, and it is worth noting the car-park solar mandate reported in the press is only a government call for evidence (May–June 2025) — not law. The sensible framing is to future-proof your site before it becomes mandatory, not to treat it as a current requirement.

An illustrative scenario

Illustrative only. A logistics operator with a 45-bay depot car park wanted sheltered charging for its growing electric van fleet and staff EVs. We designed a 90 kWp canopy over the parking with sixteen 7kW AC sockets underneath, sized so the array feeds the chargers and the depot's daytime load. The G99 application went in on day one; Class OA prior approval and the glare study ran alongside. The vans, which return mid-shift and overnight, draw heavily from the solar during the day and from a battery buffer in the evening peak. The Workplace Charging Scheme was claimed on the sockets through our OZEV registration, and the PV was written down under the Annual Investment Allowance. Modelled self-consumption sat around 70%, with the charging margin — solar at ~10p versus grid at ~35p — carrying most of the return. Figures are illustrative and would be modelled against real meter data before any quote.

Frequently asked questions

Can a solar canopy really power our EV chargers?

For 7kW and 22kW AC charging, yes — and it is the ideal match, because a smart charger prioritises free solar over paid grid import throughout the day while cars sit parked for hours. What a canopy cannot do is run standalone 50kW+ DC rapid chargers: a single rapid unit draws more than any roof-sized array can supply. If you need rapid charging, we size the solar to your AC chargers and lighting and run the rapids off the grid plus a battery. We are upfront about that split so you are not sold something the physics won't deliver.

Why does an EV-charging canopy pay back faster than a solar-only one?

Because of behind-the-meter arbitrage. Solar-only canopies self-consume or export power at close to, or below, grid price, which is why they take 8–12 years to pay back. Put a charger underneath and the same solar generated for around 10p per kWh displaces grid electricity a driver would pay 30–47p for — self-consumed solar is worth roughly twice exported solar. That value gap pulls the blended payback toward 7 years, and the charging layer alone often pays for itself in 2–3.

What funding can we get for the charging part?

The Workplace Charging Scheme is open to 31 March 2027 and covers up to 75% of socket cost, capped at £500 per socket (£2,000 for state-funded education), for up to 40 sockets — claimed through an OZEV-authorised installer, which we are. The staff-and-fleets EV infrastructure grant, by contrast, closed to new applicants on 31 March 2026, so it is no longer available. On the canopy and PV itself you use the Annual Investment Allowance and the 50% first-year allowance, plus the business-rates exemption in England.

If you have a car park, forecourt or depot with rising charging demand, the honest starting point is your meter data and your charging schedule, not a brochure. We are a turnkey MCS-certified installer — structure, PV, electrical and the G99 connection under one contract, not a bare frame — accredited with MCS, NICEIC, RECC and TrustMark and backed by an IWA workmanship warranty. Get a free canopy feasibility, or call us on +44 7707 970661. Running a commercial car park rather than a charging site? See our solar carports for car parks page for the retail and supermarket case.