LONGi vs SunPower Solar Panels
Head-to-head comparison for Australian homes in 2026.
| Spec | LONGi | SunPower |
|---|---|---|
| Country | China | United States |
| Tier | mid-range | premium |
| Efficiency | 22.3% | 22.8% |
| Product Warranty | 15 years | 40 years |
| Performance Warranty | 25 years | 40 years |
| Degradation Rate | 0.4%/yr | 0.25%/yr |
| Price per kW | $1000-$1500 | $1500-$2200 |
| Panel Wattage | 445W | 440W |
| Cell Type | HPBC Monocrystalline | IBC Monocrystalline |
| Best For | Homeowners wanting top-tier technology at a mid-range price point | Homeowners wanting the absolute best panels with the longest warranty, especially on limited roof space |
LONGi
Pros
- + World's largest mono-silicon producer (vertically integrated)
- + Industry-leading efficiency
- + 15-year product warranty
- + Heavy R&D investment
- + Excellent degradation rate
Cons
- - Slightly more expensive than Jinko/Trina
- - Chinese-manufactured
- - Some installers prefer other brands for availability
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 AU
- - Fewer system size options
- - Premium may not be justified for all roofs