Solar Car Park Buyer's Guide for UK Sites

What are car park solar panels?

Car park solar panels are bifacial monocrystalline PV modules — typically 580–620W per panel — mounted on a hot-dip galvanised steel structure built above parking bays. Unlike rooftop PV, car park solar panels generate from both the front face (direct irradiance) and the rear face (reflected light from the tarmac below), yielding 5–12% more electricity per year than equivalent rooftop installations. A typical 200-bay commercial car park supports around 310–320 solar panels at 1.5 kWp per bay.

Car park solar panel costs in 2026

UK commercial car park solar panels cost £950–£1,300 per kWp installed (turnkey, MCS-certified), compared to £900–£1,100/kWp for rooftop PV. The premium reflects the additional structural steel and foundation engineering. A 200-bay site at 300 kWp costs approximately £290,000–£390,000. After Annual Investment Allowance (100% first-year corporation tax relief on plant up to £1m), effective post-tax capex falls to £217,000–£293,000. The Public Sector Decarbonisation Scheme is closed to new applications (Phase 4, the final phase, closed in November 2024).

Which car park solar panels to choose in 2026

The two dominant technologies for car park solar panels in 2026 are TOPCon (Tunnel Oxide Passivated Contact) and HJT (Heterojunction). TOPCon panels — now manufactured by JinkoSolar, Longi, Trina, Canadian Solar and Risen — offer 22–23% efficiency, 580–625W per panel, and a 25-year linear power warranty (typically 87.5% remaining at year 25). HJT panels (Panasonic Evervolt, REC Alpha, Huasun Himalaya) achieve 23–24% efficiency and outstanding temperature coefficient performance. For bifacial car park installations, TOPCon with glass-glass construction is the current value optimum — glass-glass rear sheets survive 25-year exposure to tarmac-reflected UV better than PERC-era PET backsheets.

Annual yield from car park solar panels in the UK

A car-park canopy is pitched shallow, so model it at 10° rather than at a roof pitch. On PVGIS v5.3 a 10° south-facing canopy returns about 946 kWh/kWp/year in Cardiff, 920 in London, 875 in Birmingham, 807 in Manchester and 772 in Glasgow. A bifacial uplift of around 7% from tarmac reflection applies on top. For a 300 kWp canopy in Birmingham (875 kWh/kWp + 7% bifacial): annual generation ≈ 281,000 kWh. At a 47p/kWh commercial tariff and 75% self-consumption, that displaces roughly £99,000 of imported electricity a year, with the balance exported at a much lower rate.

Planning permission for car park solar panels

Since 21 December 2023 a canopy over an existing off-street car park has been permitted development under Class OA of Part 14, Schedule 2 of the GPDO, subject to prior approval on siting, design, external appearance and specifically glare. Class A covers rooftop solar and does not apply to a freestanding canopy; Class K (9 m², 4 m, 5 m from the boundary) is stand-alone solar beside a building, not a car-park canopy. The limits that take you to a full application are the 4 m height, a car park within 10 m of the curtilage of housing, and listed or scheduled sites. The car park solar panels page covers the PV layer.

EV charging integration with car park solar panels

EV charging is the highest-value co-use of car park solar panels. A design can pre-wire each column with a 32A three-phase spur for a 22 kW Type 2 charger or a 125A supply for 50 kW DC rapid chargers. The OZEV Workplace Charging Scheme grant covers £500 per socket since 1 April 2026 (up to 40 sockets = £20,000 per site). Solar generation can cover a substantial share of on-site EV charging energy demand, depending on fleet size and charge timing. Dynamic load management automatically prioritises EV charging during peak solar generation periods.

Choosing a car park solar panel installer

When shortlisting UK car park solar panel installers, verify: (1) the registrations and evidence that apply — NICEIC or NAPIT for the electrical work and G99 commissioning paperwork, plus an MCS certificate only if the array is under 50 kW, because MCS covers microgeneration up to 50 kW and not a typical commercial carport; (2) CDM experience — a car park installation is a construction project and CDM 2015 regulations apply in full; (3) structural engineering capability in-house or by appointment — the carport structure must be designed to Eurocode 1 wind load (EN 1991-1-4) and Eurocode 3 structural steel (EN 1993); (4) G99 DNO application experience — grid connection notification to the Distribution Network Operator is mandatory for systems over 16A per phase; (5) planning record — ask for their planning approval rate and average determination time.

Related reading: commercial solar carports · why full expensing does not cover solar · solar panels over parking bays.