TOPCon vs PERC Solar Panels — 2026 Comparison
TOPCon and PERC are the two dominant solar cell technologies in 2026. TOPCon is newer with higher efficiency, while PERC remains the cost-effective workhorse. Which should you choose?
| Metric | TOPCon | PERC |
|---|---|---|
| Cell Type | N-type | P-type |
| Efficiency | 22-24%+ | 20-22% |
| Temperature Coefficient | -0.30%/°C | -0.35%/°C |
| First-year Degradation | <1% | 2-2.5% |
| Annual Degradation | 0.35-0.4% | 0.5-0.55% |
| Power Warranty | 25-30 years | 25 years |
| Price ($/Wp FOB) | $0.10-0.14 | $0.085-0.12 |
| Low-light Performance | Excellent | Good |
| Bifacial Potential | Up to 80% | Up to 70% |
| Market Share 2026 | 55%+ | 35% |
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Expert Verdict
TOPCon is the better choice for 2026+ projects. Despite $0.01-0.02/Wp higher upfront cost, it delivers 10-15% more lifetime energy due to higher efficiency, lower degradation, and better temperature performance. PERC remains relevant for cost-sensitive residential installations.
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