- 23.7% module efficiency - 0.9pp better than the N-type 600-650W median of 22.8%
- 236.9 W/m² power density - 9.2 W/m² more than N-type 600-650W median (227.7 W/m²), more power per roof area
- At -0.28%/°C, hot weather performance is typical for N-type 600-650W panels
- Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
- Ranked #365 out of 11891 panels for efficiency in the database
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Series TWMNH-66HD 5 variants
Tongwei TWMNH-66HD series are N-type half-cut modules designed for high energy yield in real-world operating conditions – including low irradiance and applications subject to periodic shading. The key advantage lies in combining technologies boosting both-sided gain with solutions enhancing long-term reliability: high bifaciality translates to additional rear-side generation, while ultra-low degradation helps maintain predictable energy production for years. This series also features 908 Technology (0BB), an interconnection architecture minimizing optical losses and improving resistance to micro-cracking, crucial during transport and operation. Furthermore, Stencil Printing and TPE support metallization precision and cell performance quality, contributing to stable parameters. The TWMNH-66HD is ideal for C&I and utility-scale PV farms, where low LCOE, reliability, and maximum yield per square meter matter.
Electrical Parameters (STC)
| Nominal Power (Pmax) | 640 Wp |
| Module Efficiency | 23.70% |
| Voltage at Max Power (Vmpp) | 41.38 V |
| Current at Max Power (Impp) | 15.47 A |
| Open Circuit Voltage (Voc) | 49.75 V |
| Short Circuit Current (Isc) | 16.33 A |
| Max System Voltage | 1500 V |
Temperature Coefficients
| Temp. Coeff. Pmax | -0.280%/°C |
| Temp. Coeff. Voc | -0.240%/°C |
| Temp. Coeff. Isc | 0.046%/°C |
| NOCT | - |
Cell Technology
| Cell Type | Monocrystalline |
| Cell Count | 132 |
| Bifacial | Yes |
| Bifaciality Factor | 80% |
Dimensions & Weight
| Length | 2382 mm |
| Width | 1134 mm |
| Height | 30 mm |
| Weight | 32.2 kg |
| Area | 2.70 m² |
| Power Density | 236.9 Wp/m² |
Warranty
| Product Warranty | 12 years |
| Performance Warranty | 30 years |
| End-of-Warranty Output | 87.4% |
| First Year Degradation | 1.00% |
| Annual Degradation | 0.40%/year |