REC vs SunPower Solar Panels
Head-to-head comparison for UK homes in 2026.
| Spec | REC | SunPower |
|---|---|---|
| Country | Norway | United States |
| Tier | premium | premium |
| Efficiency | 22.2% | 22.8% |
| Product Warranty | 25 years | 40 years |
| Performance Warranty | 25 years | 40 years |
| Degradation Rate | 0.25%/yr | 0.25%/yr |
| Price per kW (GBP, installed) | £1,600-£1,950 | £1,700-£2,100 |
| Panel Wattage | 430W | 440W |
| Cell Type | HJT Monocrystalline | IBC Monocrystalline |
| Best For | Quality-focused homeowners wanting premium European engineering | Homeowners wanting the absolute best panels with the longest warranty, especially on limited roof space |
REC
Pros
- + 25-year product AND performance warranty
- + Excellent low-light and temperature performance (suits UK weather)
- + Norwegian engineering, Singapore manufacturing
- + Lead-free, RoHS compliant
- + Favoured by premium installers
Cons
- - Premium pricing
- - Less widely available than Tier-1 Chinese brands
- - Fewer installer options
SunPower
Pros
- + Highest efficiency panels available
- + Industry-best 40-year warranty
- + Lowest degradation rate (0.25%/yr)
- + All-black aesthetics
- + US-engineered technology
Cons
- - Most expensive option
- - Limited installer availability in the UK
- - Fewer system size options
- - Premium may not be justified for all roofs