LONGi vs Q CELLS — Solar Panel Comparison 2026
Two Premium Brands Compared
LONGi and Q CELLS (Hanwha Solutions) are both Tier 1 manufacturers offering N-type TOPCon panels. While LONGi is the world's largest panel maker, Q CELLS is known for its German engineering heritage and strong presence in European and US markets.
Flagship Comparison
| Feature | LONGi Hi-MO 7 | Q CELLS Q.TRON |
|---|---|---|
| Cell technology | N-type TOPCon (HPBC 2.0) | N-type TOPCon |
| Max power | 600W | 510W |
| Max efficiency | 22.8% | 22.0% |
| Temperature coefficient | −0.29%/°C | −0.30%/°C |
| Product warranty | 25 years | 25 years |
| Performance warranty | 87.4% at year 30 | 86% at year 25 |
| Manufacturing origin | China (vertically integrated) | South Korea / Malaysia / USA |
Key Differences
Efficiency: LONGi Leads
LONGi's 22.8% efficiency is 0.8% absolute higher than Q CELLS' 22.0%, translating to approximately 3.6% more power per unit area — meaningful for space-constrained installations.
Panel Size: LONGi Larger
LONGi Hi-MO 7 reaches 600W while Q.TRON tops out at 510W. Fewer LONGi panels are needed for the same system size, reducing installation labour.
Warranty: LONGi Longer
LONGi's 30-year performance warranty guaranteeing 87.4% output exceeds Q CELLS' 25-year warranty at 86%.
Which Should You Choose?
- LONGi Hi-MO 7: Higher efficiency, larger wattage, longer warranty, better value for UAE and Middle East projects.
- Q CELLS Q.TRON: If you prefer non-Chinese manufacturing origin or need smaller-format panels for residential aesthetics.
Frequently Asked Questions
Is LONGi better than Q CELLS?
LONGi offers higher efficiency (22.8% vs 22.0%), larger panels (600W vs 510W), and a longer performance warranty (30 years vs 25). Q CELLS is a good panel but LONGi provides better value for most projects.
Which is better for hot climates?
LONGi Hi-MO 7 with −0.29%/°C slightly outperforms Q.TRON's −0.30%/°C in extreme heat.
Is Q CELLS still German?
Q CELLS is owned by South Korean conglomerate Hanwha Solutions. Manufacturing is in South Korea, Malaysia, and the USA, though the company retains its R&D centre in Germany.
Frequently Asked Questions
Is LONGi better than Q CELLS?
LONGi has higher efficiency (22.8% vs 22.0%), larger panels, and a 30-year vs 25-year performance warranty.
Which is better for hot climates?
LONGi Hi-MO 7 (−0.29%/°C) slightly outperforms Q.TRON (−0.30%/°C) in extreme heat.
Is Q CELLS still German?
Owned by Korean Hanwha Solutions. Manufacturing is in Korea/Malaysia/USA. R&D centre remains in Germany.
