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TOPCon Series — High-Efficiency Passivated-Contact Modules
3 Models available · Solar PV Modules
Tunnel-oxide passivated-contact (TOPCon) cells push module efficiency toward 23 % with excellent low-light and high-temperature behaviour, making this series the default for yield-critical commercial and utility projects.
Model Number Breakdown
- 23 % class module efficiency
- Low temperature coefficient
- Strong bifacial gain
- Double-glass PID-resistant build
Specifications Range
All specifications and dimensions can be customized upon request
| Key parameters | Model Range |
|---|---|
| Rated Power | 550–600 Wp |
| Efficiency | 22–23 % |
| Cell Type | N-type TOPCon |
| Wafer Size | 182×210mm |
| Max System Voltage | 1500 V |
| Bifaciality | 80–85 % |
| Warranty | 30 years |
| Standard | IEC 61215, IEC 61730 |
⚙How It Works
Tunnel-oxide passivated contact (TOPCon) cells replace the rear aluminium contact with an ultra-thin oxide layer and a doped poly-silicon layer. This passivated contact stops minority carriers from recombining at the metal interface, pushing efficiency toward 23 % and — critically — reducing the temperature coefficient so output stays high in real-world heat. The technology also enables strong bifaciality, capturing albedo light from the rear.
▦Structure & Composition
The TOPCon module sandwiches 182 mm half-cut cells between 2 mm double-glass panes, using POE encapsulant for superior PID resistance and long-term durability. The rear glass — instead of a polymer backsheet — lets light reach the rear of the cell for bifacial gain, and the double-glass build earns a longer power warranty than single-glass equivalents.
Model Range
| Model | Rated Power | Efficiency | Cell Type | Max System Voltage | Standard | Reference Price |
|---|---|---|---|---|---|---|
| QD-550N-144 | 550 Wp | 22.0 % | N-type TOPCon | 1500 V | IEC 61215, IEC 61730 | … |
| QD-580N-144 | 580 Wp | 22.5 % | N-type TOPCon | 1500 V | IEC 61215, IEC 61730 | … |
| QD-600N-144 | 600 Wp | 23.0 % | N-type TOPCon | 1500 V | IEC 61215, IEC 61730 | … |
Applications
Selection Guide
- Yield-critical commercial and utility projects where the higher upfront cost is repaid by extra kWh over 25 years.
- Choose bifacial double-glass for light-coloured roofs, ground racks or high-albedo ground (sand, snow, gravel).
- Prefer TOPCon over PERC where daytime temperatures regularly exceed 30 °C, for the lower temperature coefficient.
Frequently Asked Questions
How is TOPCon different from PERC?
TOPCon replaces the aluminium rear contact with a passivated poly-silicon contact, which cuts recombination further — giving higher efficiency and a better temperature coefficient than PERC.
Does the double-glass build add real value?
Yes — it raises PID and mechanical durability and unlocks bifacial generation, typically 5–20 % extra output depending on albedo and mounting height.
What bifacial gain should I design for?
On a light roof or elevated rack at 0.5–1 m height, plan for 5–15 %; on sand or snow with high mounting, up to 20 %.
Instant Selection & Quote Calculator
Select your specifications to get an estimated price instantly.
| Base price (interpolation) | $48 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
Reference prices are for estimation only and do not constitute a formal offer.
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