Car Park Solar Panels
Car Park Solar Panels for UK Businesses
Car park solar panels sit on a free-standing canopy structure rather than a building roof. You get solar generation from your car park surface, covered parking for vehicles, and a clean EV charging platform — all from one structure over land you already own.
How car park solar panels work
Car park solar panels are functionally identical to any commercial solar array — the same panels, the same inverters, the same grid connection. The difference is the mounting structure. Instead of sitting on a roof, they are mounted on a purpose-built steel canopy frame that spans the car parking bays below.
This changes the economics in several ways that favour the car park canopy over rooftop solar:
Panel orientation is fully engineered. A mono-pitch car park canopy can be designed at the optimum south-facing orientation with the optimum UK pitch angle (8-12 degrees) regardless of which way the building faces. A rooftop array is constrained by the existing roof.
Bifacial panels produce more energy. Car park canopy panels have an unobstructed view of the sky from both faces. Bifacial TOPCon or HJT panels mounted on a canopy capture reflected light from the car park surface below, yielding 8-15% more energy than equivalent mono-facial panels. On a light-coloured concrete surface, bifacial gain reaches 10-15%.
Shading is managed at design stage. We model shading from adjacent buildings, tree lines, and neighbouring canopy sections at every hour of every day in PVSyst. String configuration minimises the impact of partial shading on overall yield.
No roof condition assessment required. Car park canopy solar bypasses the roof survey, structural assessment, asbestos survey, and tenancy negotiation that rooftop solar requires. The canopy creates its own structure.
What panels are used on car park canopies?
We specify three panel grades for car park canopy applications:
- Mono PERC (420-440 Wp, 21-23% efficiency): Standard choice for straightforward commercial canopies where space is not constrained. Best cost-to-performance ratio.
- TOPCon bifacial (430-455 Wp, 23-25% efficiency): Recommended for most car park canopy applications. Bifacial gain adds 8-15% to annual yield. 25-year linear output guarantee from top-tier manufacturers.
- HJT bifacial (445-470 Wp, 25-27% efficiency): Highest efficiency available. Specified where the structural bay count limits the maximum panel count and maximum watt-peak per panel is required.
All panels carry 25-year linear output guarantees (typically 80-83% at year 25) and 12-year product warranties from Tier 1 manufacturers including JA Solar, Jinko, LONGi, and REC.
Car park solar panels: key specs
- Typical panel size
- 420–470 Wp (commercial grade)
- Panels per space
- 3.5–4 panels per bay
- kWp per space
- 1.47–1.88 kWp
- Annual kWh per space
- 1,400–2,070 kWh
- Annual saving per space
- £308–£580 (at 22–28p/kWh)
- Inverter type
- String inverter + micro-inverter options
- Monitoring
- Per-string or per-panel via portal
- Grid connection
- G98 (<50 kWp) or G99 (≥50 kWp)
Canopy vs rooftop solar panels
Car park solar panel output by car park size
Based on full canopy coverage, TOPCon bifacial 420 Wp panels, UK average irradiance (950-1,050 kWh/kWp/yr), and electricity at 22-28p/kWh.
| Spaces | Panel count | System size | Annual output | Annual saving |
|---|---|---|---|---|
| 20 spaces | 70–80 | 29–34 kWp | 28,000–33,000 kWh | £6,160–£9,240 |
| 50 spaces | 175–200 | 74–84 kWp | 70,000–80,000 kWh | £15,400–£22,400 |
| 100 spaces | 350–400 | 147–168 kWp | 140,000–160,000 kWh | £30,800–£44,800 |
| 200 spaces | 700–800 | 294–336 kWp | 280,000–320,000 kWh | £61,600–£89,600 |
| 500 spaces | 1,750–2,000 | 735–840 kWp | 700,000–800,000 kWh | £154,000–£224,000 |
Savings based on 80% self-consumption of generated electricity at 22-28p/kWh. Actual figures vary by site profile.
From car park to generating asset
Foundation
Piled or ground-screw foundations installed in the car park surface. Compact rigs minimise disruption. Works sectioned to keep 80%+ of spaces available throughout.
Structure
Hot-dip galvanised steel columns, rafters, and purlins erected by mobile crane or telehandler. Pre-fabricated off-site for fast installation. Designed for 40+ year life.
Panels
TOPCon bifacial or Mono PERC panels clamped to aluminium racking on the purlins. DC string wiring run inside conduit to string inverters. Per-string monitoring included.
Inverters
String inverters housed in weatherproof enclosures mounted on the canopy structure or adjacent wall. Sized to match string DC output with 10-15% headroom for clipping.
Grid connection
AC cable run to main distribution board. G98 notification (sub-50 kWp) or G99 technical approval and metering (50 kWp+) arranged with the local DNO.
Commissioning
MCS commissioning test and certificate. Monitoring platform configured. SEG application submitted. Handover pack including O&M documentation and warranty documents.
Design your car park solar panel system
We design the panel layout, specify the inverter configuration, model the annual yield, and return a full financial analysis within 5 working days. Free of charge, no commitment.
Get a free panel design & quote