Commercial Solar EV Charging for UK Businesses
Rooftop or canopy solar powering workplace and fleet chargers — one design, one grid application, one business case. WCS grant handling and load management included.
- MCS Certified
- NICEIC
- OZEV-Authorised Installers
- IWA-Backed
Why commercial solar EV charging is one project, not two
Commercial solar EV charging works because the two technologies complete each other's economics. A solar array on a five-day business typically exports 20–40% of its generation for 4–12p/kWh — decent, not great. Add EV charging and that surplus becomes the cheapest vehicle fuel in Britain: schedulable daytime load that absorbs generation on-site at full displacement value. Meanwhile the chargers, which would otherwise draw grid power at 24–30p/kWh, run substantially on electricity your roof produced for a lifetime cost of 5–8p.
Designing them together also halves the boring costs. One DNO application covers generation and new load. One groundworks package serves canopy foundations and charger circuits. One supply-capacity assessment answers both questions — and where headroom is tight, smart load management usually solves what a six-figure supply upgrade would otherwise be quoted for.
This site covers the whole stack: the combined business case, how the engineering works, choosing charging hardware, the Workplace Charging Scheme grant, canopy integration for sites without roof space, and fleet depot electrification where the numbers get genuinely large.
What the combination delivers
Who this serves
Workplaces electrifying staff parking. Offices, hotels and visitor destinations adding 7–22kW sockets for employees and guests — usually 4–20 sockets, WCS-supported, fed by rooftop solar that was already worth installing. The chargers raise the solar self-consumption; the solar caps the charging cost.
Fleet operators electrifying depots. Vans first, trucks following: depot charging is the defining energy project of UK logistics this decade. Solar plus smart scheduling routinely covers 30–60% of fleet energy on suitable sites — the fleet depot guide works the numbers at van, mixed and HGV scale.
Sites without roof: car parks. Where the roof is shaded, leased or full, solar canopies put generation directly over the parking bays it serves — dual-purposing land the business already owns.
The honest constraints
Solar generates in daylight; overnight depot charging still needs grid (or storage). Rapid DC charging draws more than most arrays produce at any instant — it is grid-led with solar offset, not solar-fed. And every project lives within the site's supply capacity until the DNO says otherwise, which is why load management is the first engineering conversation, not an add-on. Anyone selling "free fuel from the sun" without those caveats is selling something else too.
From energy data to vehicles charging on sunshine
Generation, charging load and grid headroom are modelled together from day one.
- 01Week 1
Combined desk feasibility
Half-hourly building data plus fleet/staff charging requirements modelled together: array size, charger schedule, supply headroom and indicative pricing.
- 02Week 2–6
Survey & DNO strategy
Structural and electrical survey, then one G99/load application covering generation and chargers — sequenced so the DNO clock never blocks delivery.
- 03Week 4–8
WCS grant & fixed price
Workplace Charging Scheme voucher application handled, fixed price issued against a written scope across both systems.
- 04Month 2–5
Install & commission
Solar and charging installed in one mobilisation. Load management commissioned, monitoring live, handover pack covering the whole system.
The 2026 context: why this combination is accelerating
Three timelines are converging on UK business car parks. Fleet electrification has moved from pilots to procurement — vans are cost-competitive on whole-life numbers today, and the zero-emission vehicle mandate keeps tightening manufacturer supply toward EVs. Public rapid charging has settled at 60–85p/kWh, a price that makes any depot-charging alternative look brilliant and a solar-fed one unanswerable. And the tax environment rewards acting while it lasts: the Annual Investment Allowance's 100% year-one deduction covers both the array and the charging infrastructure on most projects, with the Workplace Charging Scheme stacking £350 per socket on top.
The VAT position is worth knowing before comparing quotes: commercial installations carry standard 20% VAT (recoverable for VAT-registered businesses) — the much-advertised 0% solar rate applies to domestic property only and runs to March 2027. Quotes on this site, and from any serious commercial installer, are conventionally ex-VAT.
Against those drivers sits one honest brake: grid connection lead times. New large loads and new generation both queue through DNO processes, and sites that start the application early keep it off the critical path entirely. That — more than panel prices, charger models or grant windows — is why the right month to start a combined feasibility is this one, even for fleets whose vehicles arrive in 2027. Energy infrastructure rewards the operators who sequence it ahead of need, and punishes the ones who order chargers the week the vans arrive.
A note on how the numbers on this site are built. Cost bands come from delivered-project and tender pricing, not manufacturer list prices; energy values use 2025–26 commercial rates (24–30p/kWh grid, 60–85p public rapid, 4–12p export) and are flagged wherever they are directional rather than contractual; and scheme rules — the WCS rate, the AIA threshold, the smart chargepoint regulations — are stated as they operate at the time of writing, with the gov.uk source linked where one exists. Where a claim depends on your specifics, the page says so and points at the model instead of pretending a national average is your answer. That discipline is the difference between content that sells systems and content that sizes them — and it is the standard every page here is written to. If a figure on this site ever lags the market, tell us and we will correct it; the bands only stay useful while they stay honest.
Solar + EV charging — common questions
The full FAQ page and the linked guides go deeper on every answer.
Why combine solar with EV charging rather than do them separately?
Because each fixes the other's weakness. EV charging adds large, schedulable daytime load that soaks up solar generation a building couldn't use alone — pushing self-consumption towards 90%+. Solar caps the energy cost of running chargers at roughly 5–8p/kWh lifetime cost instead of 25p+ grid rates. Shared groundworks, supply upgrades and electrical infrastructure save 10–20% versus two separate projects.
How much does a combined solar and EV charging system cost?
A typical SME package — 50kW rooftop solar plus four 22kW dual-socket workplace chargers — lands around £55,000–£70,000 installed in 2026, before the Workplace Charging Scheme grant and year-one tax relief. Fleet-depot scale projects run from £150,000 to £500,000+ depending on vehicle count and grid headroom.
What grant support exists in 2026?
The Workplace Charging Scheme provides £350 per charging socket (up to 40 sockets) towards chargepoint costs for eligible businesses, charities and public bodies. There is no general grant for the solar side — its support is tax-shaped, via the Annual Investment Allowance's 100% year-one deduction. Both are covered in detail on our WCS page.
Can solar actually charge vehicles directly?
Yes — through the building's electrical system rather than a literal panel-to-plug cable. Generation flows to whatever load exists, chargers included; smart load management prioritises charging when the array is producing. A 50kW array generates enough annually to drive a fleet of vans roughly 150,000 miles. What solar cannot do alone is rapid-charge at night, which is why systems are designed around grid, solar and (sometimes) batteries together.
Do workplace chargers have to comply with smart charging rules?
The Electric Vehicles (Smart Charge Points) Regulations 2021 set smart functionality requirements at the point of sale for relevant chargepoints, and workplace installations interact with them differently than home units. In practice every credible commercial chargepoint sold in 2026 is smart, OCPP-capable and ready for load management — the regulations are a floor the good hardware cleared years ago. Our load management guide covers the details.
Start with the arithmetic, not the hardware
The right first question is not "which charger?" but "what does the site's energy picture look like with vehicles in it?" Twelve months of half-hourly data, your fleet or staff-charging expectations, and the site address are enough to model the whole system: array size, charger count and type, load management approach, grid position, WCS eligibility, and the combined cash flow. That model — not a brochure — is what a board can approve. The blog covers the questions in between, from how the combination works in practice to fleet sizing arithmetic.
Domestic drivers get the same on-site benefit: solar EV charger installation lets an EV charge from the roof via a solar-diverting charger.
Further reading: Pairing solar with a smart charger lets an Edinburgh driver charge from their own roof and top up on cheap overnight units, so for home or workplace EV charger installation Edinburgh use an installer who can integrate the charger with an existing or planned PV and battery system.
Further reading: Pairing chargepoints with generation directly overhead is cheapest via EV-integrated solar canopies, where the canopy columns carry power to the bays below.
Car parks pairing chargers with generation increasingly choose solar EV charging canopies so the shelter and the power come from a single structure.