Car Dealerships & Showrooms: Solar panels for gyms

Why car dealerships and showrooms are a strong solar building

A car dealership carries a large, glassy, daytime electricity load. Big glazed showrooms need lighting and climate control through opening hours, the workshop runs ramps, compressors and diagnostic equipment all day, and forecourt lighting carries into the evening. That daytime-weighted demand is exactly what solar panels serve well, because the generation is consumed on site rather than exported cheaply. The same self-consumption logic that makes solar panels for gyms pay applies to dealerships: where the load runs through the daylight hours, the panels earn their keep and the return follows. Payback depends on the tariff and on how much of the generation the site uses itself.

There is a sector-specific driver on top of the bill saving. EV-franchise manufacturers increasingly mandate on-site renewables and customer charging as a brand, or corporate-identity, standard, so for many dealers solar is no longer just a cost decision, it is a franchise requirement. The good news is that the two halves reinforce each other: demonstrator and customer EV charging absorbs solar generation at full self-consumption value, the most valuable kWh on the system, so meeting the manufacturer standard and cutting the bill are the same project. Big flat showroom and workshop roofs suit rooftop PV, and forecourt canopies and car-park carports add capacity where the roof is limited, the same standardised rooftop-plus-carport-plus-EV template a multi-site gym or retail operator rolls across an estate, which is exactly how a dealer group can deploy across all its sites without engineering each one from scratch.

Energy is a significant and rising controllable cost for a dealership, and the visible commitment to renewable power increasingly matters to manufacturers and customers alike as the market shifts to electric vehicles. A customer arriving to look at an EV who charges it on solar-generated power while they are in the showroom is exactly the experience the franchise wants to project, and it self-consumes the most valuable kWh on the system at the same time. That alignment between the brand story, the franchise requirement and the energy economics is unusual, and it is the main reason dealership solar tends to move quickly once the manufacturer standard is on the table.

What a typical install looks like and how it is sized

For a dealership or showroom, a system usually lands in the 50 to 400 kW range, 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. Sizing should start from at least twelve months of half-hourly data set against the glazed-showroom, workshop and forecourt load, and demonstrator and customer EV charging belong in the figure because that daytime charging absorbs generation at full value and is the highest-value part of the system. Manufacturer corporate-identity standards may dictate panel placement, so it is better to design to those from the outset rather than retrofit around them. Where the roof cannot carry the target, forecourt canopies and car-park carports add capacity while doubling as covered, EV-ready display and customer parking, and on a dealership the forecourt and car park are often the biggest untapped surfaces available. The roof type should also be checked before an installer quotes: trapezoidal and standing-seam metal, single-ply membrane and built-up felt all take PV with the right fixings, while asbestos cement on older workshop blocks cannot be retrofitted and needs replacing first, which should be identified at survey rather than on the day of install.

Costs, payback and tax relief

A dealership project typically runs between £45,000 and £350,000 depending on showroom and workshop area; these are illustrative estimates, not quotes, and the payback depends on the tariff and on how much of the generation the site uses itself. Solar PV is a special-rate plant-and-machinery asset, so the 100% Annual Investment Allowance lets most dealers write off the full cost against profit in year one on the first £1m of qualifying spend, worth up to around a quarter of the project value back in tax for a limited company. Solar does not qualify for full expensing, so the AIA or the 50% First-Year Allowance applies, and a single-site dealership install is fully expensed in year one within the cap. The Smart Export Guarantee pays for any surplus; export rates are set by suppliers and vary widely (around 12-13p/kWh for the better fixed tariffs at October 2026), though strong daytime self-consumption keeps export modest. For a multi-site dealer group the combined spend may exceed the AIA cap, in which case relief is split across the AIA and the 50% First-Year Allowance and the rollout is phased over the programme. Our cost guide works through the numbers.

Funding routes in detail

Dealers usually prefer to keep capital working in stock and the customer experience, and solar can be funded so it does not compete for that budget. A power purchase agreement (PPA) can give solar with no upfront capital cost, paying per kWh at a contract rate usually below grid; check the term, the price escalation and the accounting treatment. Asset finance spreads the cost over seven to fifteen years and is typically cash-positive from year one, and operating leases give a predictable per-site monthly cost across a group. The standout grant here is the Workplace Charging Scheme, which pays up to £500 per socket for installations completed on or after 1 April 2026, covering up to 75% of the purchase and installation cost including VAT, up to 40 sockets per applicant, for staff and visitor chargepoints, and it pairs directly with the franchise charging requirement and with solar self-consumption. The parking must be off-road and not solely for customers, so check the parking eligibility rules before counting on it for visitor charging. The scheme closes on 31 March 2027, so applications should be made well before then. The combined PV-plus-charging business case is consistently stronger than either project alone, which is why the panels and the chargepoints are best planned as one project rather than two. For a dealer facing a manufacturer mandate to install customer charging, that matters: the charging is going in regardless, so pairing it with solar means the franchise requirement is met and a large share of the charging draw is covered by self-generated power instead of grid import. The charger count the franchise requires, the grant the Workplace Charging Scheme may contribute towards it, and the solar needed to feed it are best worked out as a single set of numbers rather than three separate decisions.

Compliance and sector considerations

Two sector-specific points shape dealership solar. First, manufacturer corporate-identity (CI) standards may dictate panel placement and the EV-charger provision, so it is sensible to design to those rules from the outset rather than retrofit around them, which also keeps the install compliant with the franchise agreement. Second, the workshop: paint, fuel and chemical areas carry COSHH and DSEAR considerations and need careful electrical zoning so the install respects those hazardous zones. A G99 application and the network operator's approval are needed before connection above 16 A (3.68 kW) per phase, and larger dealerships often have an existing HV connection that simplifies integration, though connection timescales vary by network operator. The Workplace Charging Scheme requires an authorised installer for the EV works. Franchisor procurement may also ask for quality, environmental and health-and-safety management certification, so it is worth asking an installer what it holds. Design should be checked against your insurer's requirements for rooftop arrays, and a roof structural survey should be carried out before any array is loaded.

How to approach this kind of project

Start from half-hourly meter data and model demonstrator and customer EV-charging growth into the figure, because that daytime charging is the highest-value generation on the system. Design to manufacturer CI standards from the start so panel placement and charger provision meet the franchise requirement, and zone the workshop carefully around its COSHH and DSEAR hazardous areas. A structural survey should be commissioned, the G99 application submitted early or the existing HV connection used, and the Workplace Charging Scheme eligibility checked, since an authorised installer must do the EV works. The work can be scheduled around opening hours so the showroom keeps trading, with the only outage being the final connection booked for a quiet period. The roof build-up should be checked, and older workshop blocks surveyed for asbestos cement, before quoting rather than on the day, so any reclad is in the plan rather than a surprise. A good proposal is a single, fully priced document with a clear workmanship warranty, and forecourt canopies and car-park carports should be assessed alongside the roof as standard, since they meet the franchise charging requirement and add generation in one structure. For dealer groups, one design can be standardised across the estate with a single monitoring dashboard, portfolio pricing and one point of contact, and the dashboard can report live generation, lifetime kWh and CO2 saved per site, which supports both the facilities team and any manufacturer or corporate sustainability reporting the franchise requires.

If your group also runs forecourt retail or leisure units, see our pages on solar for supermarkets and convenience retail and solar for gyms and health clubs, which share the daytime self-consumption and EV-charging logic that drives the dealership case. When you are ready, read the cost guide and grants and funding, send an enquiry with your meter data, or browse the FAQs first.