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. Paybacks here typically sit around 5.5 years, after which the power is effectively free for the rest of the system's life, usually fifteen to twenty plus years beyond that point.

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 we size it

For a dealership or showroom we usually design a system 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. We size from at least twelve months of half-hourly data against the glazed-showroom, workshop and forecourt load, and we model demonstrator and customer EV charging into 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 we design to those from the outset rather than retrofitting 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. We also check the roof type before quoting: 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 we identify 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, with a simple payback near 5.5 years. 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 we use the AIA or the 50% First-Year Allowance, and a single-site dealership install is fully expensed in year one within the cap. The Smart Export Guarantee pays for any surplus, with 2026 rates typically in the 4 to 15p per kWh range, 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) gives solar with zero capex, paying per kWh below grid with savings from day one and the system off the balance sheet. 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 £500 per socket and up to £20,000 per applicant from April 2026, covering up to 75% of purchase and installation cost for staff and visitor chargepoints, and it pairs directly with the franchise charging requirement and with solar self-consumption. The scheme closes permanently at the end of 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 we design the panels and the chargepoints 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. We model the charger count the franchise requires, the grant the Workplace Charging Scheme will contribute towards it, and the solar needed to feed it, 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 we design to those rules from the outset rather than retrofitting 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 is required above 17 kW per phase, and larger dealerships often have an existing HV connection that simplifies integration and shortens what can otherwise be a six to eighteen month grid timeline. The Workplace Charging Scheme requires an OZEV-approved installer for the EV works, which we hold, alongside MCS, NICEIC, RECC and TrustMark certification and ISO 9001, 14001 and 45001 where franchisor procurement requires it. We design to the SPF1981 rooftop fire-safety standard, and a roof structural survey is carried out before any array is loaded.

How we approach this kind of project

We size 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. We design to manufacturer CI standards from the start so panel placement and charger provision meet the franchise requirement, and we zone the workshop carefully around its COSHH and DSEAR hazardous areas. We commission a structural survey, submit the G99 application early or work with the existing HV connection, and we handle the Workplace Charging Scheme application as an OZEV-approved installer. We schedule the work around your opening hours so the showroom keeps trading, with the only outage being the final connection booked for a quiet period. We check the roof build-up and survey for asbestos cement on older workshop blocks before quoting, not on the day, so any reclad is in the plan rather than a surprise. You receive a single fixed-price proposal and an insurance-backed workmanship warranty, and forecourt canopies and car-park carports are assessed alongside the roof as standard, since they meet the franchise charging requirement and add generation in one structure. For dealer groups we standardise one design across the estate with a single monitoring dashboard, portfolio pricing and one point of contact, and the dashboard reports 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.

An illustrative example

As an illustrative composite based on typical UK dealership projects, and not a real named client: an EV-franchise dealership with a large glazed showroom, a busy workshop and a forecourt, facing a manufacturer requirement for on-site renewables and customer charging, installed around 250 kW across the showroom and workshop roofs, roughly 460 panels generating in the region of 230,000 kWh a year. Demonstrator and customer charging absorbed midday generation at full self-consumption value, the chargepoints were part-funded under the Workplace Charging Scheme, qualifying cost was written off under the Annual Investment Allowance, and the payback came in near 5.5 years while the install met the franchise brand standard and the manufacturer corporate-identity rules for panel placement. The workshop was zoned carefully around its paint and chemical areas so the install respected the COSHH and DSEAR requirements, the chargepoints were installed under our OZEV approval to qualify for the grant, and the showroom kept trading throughout with only the final connection taken during a closed period. The figures are illustrative and depend on your showroom, workshop load, charging provision and tariff.

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, request a free feasibility from your meter data, or browse the FAQs first.