Solar panels for dealerships, daytime power for showrooms, workshops and EV charging
Solar panels for dealerships pay back faster than most people expect, because a franchised car dealership runs almost its entire electrical load in daylight, which is exactly when a rooftop array generates most. A large glazed showroom is lit and climate-controlled through every trading hour, the workshop and MOT bays run compressors, ramps, diagnostics and extraction all day, and forecourt and signage lighting layer on top. On top of all that sits the fastest-growing load of all: EV charging, both for customer handovers and for the demonstrator and staff vehicles that the manufacturer transition is driving onto every site. Because that demand sits squarely under the generation curve, the electricity your panels make is consumed on site rather than exported cheaply, and self-consumption is the single biggest driver of solar payback. Whether your franchise agreement or the manufacturer's retailer standards set any requirements for renewables or EV-charger provision is worth checking, but on the load alone a showroom roof is one of the better commercial solar sites on any high street.
Why dealerships suit solar so well
Five loads stack up through the daylight hours on a typical site. The showroom is a glass box that takes heavy HVAC to stay comfortable summer and winter, plus continuous lighting to present the metal well. The workshop and MOT bays draw steadily all day on ramps, air tools, diagnostics and extraction. Forecourt lighting runs long hours to keep stock visible and the site secure. EV charging is the load that changes everything: customer handover chargers and demonstrator charging absorb midday generation at full self-consumption value, the most valuable kWh on the system. And the manufacturer brand standard is worth checking: some franchise agreements or retailer standards may set requirements for renewables, EV-charger provision or signage, so confirm what yours says before design. Unlike fuel or stock, electricity is a cost you can bring down for two decades with a single investment, and in a sector where margins on the metal are thin and aftersales does much of the heavy lifting, a more predictable energy bill is one of the few levers a dealer principal genuinely controls.
How systems are sized for a dealership
A sound design never simply fills the roof. Sizing is driven by daytime baseload, not roof area, so it starts from at least twelve months of half-hourly meter data and the real shape of your trading day, because a single-franchise showroom has a very different load curve to a multi-marque site with a busy aftersales workshop. For a dealership a system is usually designed in the 50 to 400 kW range, which is roughly 92 to 740 panels across about 400 to 2,800 square metres of showroom and workshop roof. A system that size generates in the region of 46,000 to 370,000 kWh a year and saves between 11 and 85 tonnes of CO2 annually (indicative planning figures). Where workshop and showroom demand is high and steady, sizing toward 80 to 90% of daytime load gives maximum self-consumption, and EV-charging growth, demonstrators, staff vehicles and customer handovers, should be modelled into the load before the final figure is settled. Where the showroom and workshop roofs are the constraint, the forecourt is usually the biggest untapped surface you own, and a solar carport over customer or demonstrator parking adds capacity while giving shaded, EV-ready bays at the entrance. A solar carport is a structure in its own right, so check planning with the council before design.
Costs, payback and tax relief
A dealership project typically lands between £45,000 and £350,000 on indicative planning ranges, depending on showroom size, workshop footprint and how much carport you add, with a typical simple payback near 5.5 years and, after payback, the system keeps cutting the grid bill for the rest of its working life. The standout financial lever is the tax treatment. Solar PV falls into the special-rate plant and machinery pool, so the 100% Annual Investment Allowance covers the first one million pounds of qualifying spend against profit, a year-one effective tax saving of up to 25% for a limited company. Being a special-rate asset, solar is not covered by full expensing, so the AIA applies and, for spend beyond the cap, the 50% First-Year Allowance, with multi-site group rollouts apportioned across both. If capital is the blocker, a dealer can fund the system without touching the budget for the customer-facing side of the business: a power purchase agreement can deliver the array with zero capex and a per-kWh rate below grid from day one, while asset finance keeps the system on the balance sheet but spreads cost over several years and is cash-positive from year one only where the energy saving exceeds the repayments. Our cost guide sets out worked numbers for showroom-only, showroom-plus-workshop and carport-inclusive designs.
Funding routes for dealership solar
Because dealerships are adding EV charging anyway, the Workplace Charging Scheme is the grant that matters most. Administered by the Office for Zero Emission Vehicles, from 1 April 2026 it pays £500 per socket, up from £350, covering up to 75% of the purchase and installation cost across up to 40 sockets, and it pairs directly with on-site solar because daytime charging self-consumes generation. For a business the chargepoints can only be used by its staff and fleet, and parking solely for customers is ineligible, so customer-only charging on a forecourt is not eligible; check whether demonstrator vehicles count as fleet. The scheme closes on 31 March 2027, so any application should be made well before then. The Smart Export Guarantee tops up the case for any exported units: licensed suppliers must offer an export tariff above 0p to eligible generators up to 5 MW, the installation must meet Ofgem's Smart Export Guarantee eligibility rules (certification requirements can depend on system size), and rates are set by suppliers and differ widely, so compare current tariffs. A dealership self-consumes most of what it makes, so SEG is a smaller part of the case than the avoided import. The grants and funding page sets out which combination of schemes may apply.
Compliance and sector considerations
The point most specific to dealerships is the manufacturer. Check whether your franchise agreement or the manufacturer's retailer standards set any requirements for renewables, EV-charger provision or signage; if they do, agree panel and charger positions with the manufacturer before design rather than retrofitting around them. The workshop carries its own considerations: paint, fuel and solvent areas fall under COSHH and DSEAR, so the electrical works need to be zoned carefully around them. In England, rooftop PV on a commercial building is generally permitted development under Class J of Part 14, Schedule 2 of the GPDO 2015, subject to conditions: microgeneration up to 50 kW is permitted, while a roof array above 50 kW needs the council's prior-approval decision on design and external appearance, including glare. An array is not permitted if it protrudes more than 0.2 m beyond a pitched roof plane, sits more than 1 m above the highest part of a flat roof, or lies within 1 m of the roof's external edge. Listed buildings and their curtilage are excluded, but a conservation area does not remove Class J for a roof. Planning is devolved in Wales and Scotland, which have their own rules. A solar carport over the forecourt is a structure in its own right, so check planning with the council before design. A G99 application and DNO approval are required before connection above 16 A (3.68 kW) per phase, though many larger dealerships have an existing HV connection that simplifies integration; smaller or older premises may have a constrained single-phase supply needing a DNO upgrade. A structural survey of the showroom and workshop roofs is needed before any load goes on, and it is worth asking your insurer whether it expects a rooftop PV fire-safety standard to be met. Larger dealer groups can fall within ESOS Phase 4, whose compliance notification is due 5 December 2027, and on-site solar is one of the most credible recommendations such an audit can identify. Where a site is leased, on-site solar can improve the EPC against the MEES standard, which currently requires at least EPC E to let commercial property; a higher minimum standard has been consulted on, but no date is confirmed, and a better EPC helps protect the lettability and value of the unit. When you appoint an installer, ask about the standards procurement teams expect: MCS commercial certification where a scheme or grant asks for it, NICEIC or NAPIT electrical accreditation, RECC and TrustMark membership where relevant, OZEV-approved status for the charging works, and ISO 9001, 14001 and 45001 where the franchisor requires them.
How a dealership project is typically approached
A sound project starts from your half-hourly meter data, not a roof plan, so the system is matched to the load your showroom and workshop genuinely draw, with EV-charging growth modelled in. The PV and the chargepoints are best designed as one project, so that daytime charging self-consumes generation and the Workplace Charging Scheme application is planned alongside. The forecourt carport is worth assessing alongside the roof as standard, because it is usually the largest surface available. The roof build-up should be surveyed, and older workshop blocks checked for asbestos cement, before a quote is accepted rather than on the day of the install, since asbestos sheeting cannot take panels and needs replacing first. The G99 grid application is best submitted early, alongside the structural survey, because the DNO connection is often the longest pole on the programme, taking many months on capacity-constrained networks, so that clock should start immediately. The physical works, typically several weeks depending on size, can be scheduled around your trading and aftersales pattern, working in zones, with the only real outage being the final grid connection, which can be booked for a quiet period. Ask the installer for a proposal that states its price basis, ask what workmanship warranty and insurance cover comes with it, and ask what annual operations and maintenance and remote monitoring are included after commissioning, so that a dealer group can see live generation and lifetime CO2 saved across every site on a single dashboard.
When you are ready, see worked numbers in our cost guide, map the schemes on the grants and funding page, send an enquiry from your meter data, or read the solar FAQs first. Dealerships adding chargers should also read solar and EV charging for car dealerships. Dealer groups whose estates also include forecourt convenience space or retail-park sites may find our pages on car dealership and showroom solar and supermarket and convenience solar useful too.
