Solar and EV Charging for Car Dealerships: 2026 Guide
The dealership forecourt has quietly become an energy problem
A modern car showroom draws power almost around the clock. Bright display lighting runs through opening hours and often into the evening, the workshop pulls hard on compressors and diagnostic rigs, and the newest line item - EV charging for demo cars, courtesy vehicles and customers - is climbing fast. Check whether your franchise agreement or the manufacturer's retailer standards set any requirements for EV-charger provision; either way, the electricity bill and the grid connection come under pressure at the same time.
That combination is exactly why rooftop solar and EV charging are increasingly specified together on dealership sites rather than treated as two separate projects. Large, flat or shallow-pitched showroom and workshop roofs usually sit unused, and dealership electricity demand peaks in daylight - the hours solar generates. Instead of exporting cheap surplus, a site can pour it straight into the cars on the forecourt.
Why solar and charging belong on the same project
The economic case rests on a simple mismatch. Buying grid electricity to charge a demo fleet or offer customer top-ups is one of the more expensive things a dealership does per unit. Generating your own from the roof typically costs a fraction of that over the life of the system, so every kilowatt-hour you do not import is money kept on site.
Pairing them also softens the two things that worry finance directors: rising import costs and the capital cost of a bigger grid connection. Solar shaves the daytime import peak while smart charging spreads the load. Between them they can often keep a site within its existing supply capacity, avoiding a five-figure - sometimes six-figure - reinforcement bill from the network operator.
What the grants and allowances actually cover in 2026
There is no single "dealership solar grant." UK support in 2026 comes from a handful of separate schemes, and the trick is stacking the ones you qualify for.
| Support | What it covers | Applies to |
|---|---|---|
| OZEV Workplace Charging Scheme | Up to £500 per socket for installations completed on or after 1 April 2026 (£350 before), up to 40 sockets across all sites | Charge points and their installation |
| AIA / first-year allowance | 100% (AIA, up to £1m) or 50% first-year on special-rate assets | The solar array and equipment |
| Smart Export Guarantee | Payment for exported surplus electricity | Excess solar generation |
OZEV grants for the charging side
The Office for Zero Emission Vehicles (OZEV) still funds workplace charging. The Workplace Charging Scheme gives eligible businesses a voucher worth up to £500 per socket for installations completed on or after 1 April 2026 (up to £350 before that date), covering up to 75% of purchase and installation cost, with up to 40 sockets across all your sites. For a business the chargepoints can only be used by its staff and fleet, and parking solely for customers is ineligible, so it suits staff and fleet vehicles (check whether courtesy cars and demo vehicles count as fleet) rather than customer-only charging. These grants apply to the chargers and their installation, not to the solar array, so they sit alongside the solar case rather than replacing it.
Capital allowances on the solar array
Solar is where the tax system does the heavy lifting. The Annual Investment Allowance lets a business deduct 100% of qualifying plant and machinery - up to £1 million a year - against taxable profit, and a commercial solar system generally qualifies. For companies whose spend exceeds the AIA, a 50% first-year allowance is available on special-rate assets such as solar panels (full expensing does not cover solar). The practical effect is that a slice of the install cost comes back through a reduced corporation tax bill in the same year, which shortens payback. Note that the temporary 0% VAT rate on installing solar PV and batteries, which runs to 31 March 2027, applies to residential accommodation and certain charitable buildings; commercial premises such as dealerships pay the standard 20% - a common point of confusion.
Getting paid for genuine surplus
On quiet days - a bank holiday, a sunny Sunday - a dealership roof can generate more than the site and its chargers use. The Smart Export Guarantee obliges licensed suppliers to offer an export tariff for that exported electricity (the installation must meet Ofgem's Smart Export Guarantee eligibility rules, which can depend on system size, so ask your installer), so surplus can be earned rather than given away. It will not transform the business case, but it stops summer overproduction being wasted.
Load management is the part dealers underestimate
The biggest technical risk on a dealership site is everything switching on at once: a bank of chargers, the workshop and the showroom heating or cooling all peaking together can push the site over its agreed capacity. Modern load-management systems solve this by throttling and sequencing charge points dynamically - prioritising a customer's quick top-up over an overnight fleet charge, for example, and drawing from solar and any on-site battery before the grid. Getting this design right is usually far cheaper than upgrading the supply, and it separates a system that quietly saves money from one that trips out at the worst moment.
What the numbers tend to look like
Every site is different, so treat any figure as illustrative rather than a promise. In broad terms, the indicative payback for a well-specified commercial rooftop system on a dealership is in the mid-single-digit range of years, helped considerably by the first-year tax relief above, and then the system keeps cutting the grid bill for the rest of its working life. Add EV charging part-funded by OZEV where the scheme conditions are met, and the charging infrastructure becomes cheaper to run for its whole life. The point is not a headline percentage but that two costs the dealership will incur anyway - power and chargers - are lower when planned together.
Do not forget the customers driving off the forecourt
There is a commercial angle beyond the building. Every EV a dealership sells creates a household that needs to charge at home, and buyers increasingly expect their salesperson to have an answer. Being able to point customers towards a reputable home-charger installer is a small service that builds trust and repeat business. Many of those buyers will be local: in the South West, for instance, the domestic-scale side that a commercial forecourt project does not cover falls to regional installers such as EV charger installation in Cornwall.
Where to start
Begin with a half-hourly data pull from your electricity supplier - it reveals your real load shape and how much solar the site can genuinely self-consume. From there, a commercial installer can model the roof, size the array against your demand plus expected charging growth, and design load management so the chargers and the building share capacity. Confirm which OZEV grants you qualify for before committing (the Workplace Charging Scheme covers staff and fleet charging, not customer-only parking), and ask your accountant to verify the AIA or first-year allowance position for your entity. Done in that order, solar and EV charging stop being two competing capital requests and become a single, self-reinforcing upgrade to the forecourt.