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635Wp
Tongwei TWMNH-66HD635
Tongwei Review

TWMNH-66HD635

MonocrystallineBifacial
23.50%
Efficiency
235.1 Wp/m²
Power Density
-0.280%/°C
Temp. Coeff. Pmax chart
555W from 635W
Power after 30 years
  • 23.5% module efficiency - 0.7pp better than the N-type 600-650W median of 22.8%
  • At 235.1 W/m² power density, this panel generates 7.4 W/m² more per unit area than N-type 600-650W median (227.7 W/m²)
  • At -0.28%/°C, hot weather performance is typical for N-type 600-650W panels
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • #509 for efficiency, #1072 for temperature performance out of 11891 panels
Performance Profile
Price Offers 0
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Series TWMNH-66HD 5 variants
Efficiency Range 23.5% - 24.2%
Avg. Efficiency 23.88%
Technology N-type
Dimensions 2382 × 1134 mm
Show series description

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.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)635 Wp
Module Efficiency23.50%
Voltage at Max Power (Vmpp)41.24 V
Current at Max Power (Impp)15.40 A
Open Circuit Voltage (Voc)49.60 V
Short Circuit Current (Isc)16.26 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.280%/°C
Temp. Coeff. Voc-0.240%/°C
Temp. Coeff. Isc0.046%/°C
NOCT-
Cell Technology
Cell TypeMonocrystalline
Cell Count132
BifacialYes
Bifaciality Factor80%
Dimensions & Weight
Length2382 mm
Width1134 mm
Height30 mm
Weight32.2 kg
Area2.70 m²
Power Density235.1 Wp/m²
Warranty
Product Warranty12 years
Performance Warranty30 years
End-of-Warranty Output87.4%
First Year Degradation1.00%
Annual Degradation0.40%/year
Key Specifications
23.50%
Efficiency
635 Wp
Power
-0.28%/°C
Temp Coeff
30 yrs
Warranty