How long do solar carports typically last?

Solar carports typically last 25–30 years, matching the lifespan of their solar panels. The structural frame, often made of steel or aluminium, is designed to last decades with minimal maintenance. Below is a breakdown of key considerations for UK homeowners and businesses:

Key Factors Affecting Lifespan

• Solar panels: Come with 25-year warranties (covering 80–85% performance guarantees) but can function effectively for 30+ years with proper care.
• Structural integrity: Carport frames from reputable UK installers use weather-resistant materials tested for heavy rain, snow, and winds common in the UK.
• Maintenance: Annual cleaning (removing debris, bird droppings) and electrical inspections prevent efficiency losses.

UK-Specific Considerations

• Incentives: While the UK no longer offers Feed-in Tariffs (FIT), Smart Export Guarantee (SEG) schemes pay for surplus energy fed back to the grid.
• Climate resilience: Modern designs account for UK weather, including anti-corrosion coatings and wind-load ratings up to 140 km/h.
• Recent policy: VAT on solar installations dropped to 0% for most homes (2022–2027), reducing upfront costs.

Practical Advice

Pros

✔ Dual-purpose: Generates electricity while providing shaded parking.
✔ Energy savings: A 10 kW system (covering 6–8 cars) can offset £600–£1,200/year in electricity bills.
✔ Low upkeep: No moving parts; maintenance mainly involves occasional cleaning.

Cons

✖ Upfront cost: £8,000–£25,000 for residential systems (before incentives).
✖ Planning permissions: May be required for commercial installations or listed properties.

Common Mistakes to Avoid

• Ignoring shading: Nearby trees or buildings can reduce output by 15–30%.
• Skipping warranties: Opt for panels with 25-year product warranties and carport structures with 10–15-year corrosion guarantees.
• DIY installations: Improper mounting risks damage to panels and voided warranties.

Real-World Example

A UK-based small business installing a 20 kW solar carport (covering 12 parking bays) could break even in 6–10 years through energy savings and SEG payments, with the system generating returns for 15–20 additional years thereafter.