TOPCon vs PERC Solar Panels: Which Technology to Choose in 2026?
The solar industry in 2026 is witnessing a decisive shift from PERC to TOPCon as the mainstream technology. But which one is right for your project? Here's what buyers need to know.
PERC (Passivated Emitter Rear Cell)
PERC has been the industry standard since 2019. It's mature, affordable, and widely available.
- Cell efficiency: 23.0-23.5% - Module power: 540-600W (72-cell) - Lowest $/Wp in the market - Well-proven 25+ year track record
TOPCon (Tunnel Oxide Passivated Contact)
TOPCon is the next-generation N-type technology rapidly replacing PERC in 2026.
- Cell efficiency: 25.0-26.0% - Module power: 580-730W - Better low-light performance - Lower degradation rate (0.4% vs 0.55%/year) - Higher bifaciality factor (up to 85%)
Head-to-Head Comparison
For utility-scale projects: TOPCon offers better LCOE despite higher upfront cost, thanks to higher yield and slower degradation.
For budget-constrained residential: PERC remains a solid choice at the lowest $/Wp.
What to Ask Your Supplier
- What is the actual cell efficiency (not just module efficiency)?
- What temperature coefficient does the panel have?
- Is the panel bifacial? What is the bifaciality factor?
- What warranty terms: product vs. performance?
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