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645Wp
Huayao Review

HY645-B144DSS

Monocrystalline
Datasheet
23.88%
Efficiency
238.8 Wp/m²
Power Density
-0.260%/°C
Temp. Coeff. Pmax chart
573W from 645W
Power after 30 years
Smart Insights (data-driven)
  • Efficiency of 23.9% matches the Back Contact 600-650W median
  • Power density of 238.8 W/m² matches the Back Contact 600-650W median
  • At -0.26%/°C, hot weather performance is typical for Back Contact 600-650W panels
  • At 27.6 kg, this panel is 4.8 kg lighter than Back Contact 600-650W median (32.4 kg) - easier handling during installation
  • #278 for efficiency, #457 for temperature performance out of 11672 panels
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series Hyper B72 12 variants
Efficiency Range 23.5% - 24.8%
Avg. Efficiency 24.16%
Technology Back Contact
Dimensions 2382 × 1134 mm
Show series description

The Huayao Hyper B72 series are modules designed for maximum yield in large-scale installations – where high single-panel power output and efficient installation workflows matter. Variants in this family utilize large-cell formats and the half-cut layout, which helps minimize module losses and ensures stable operation under partial shading (e.g., from roof tiles, chimneys, or adjacent rows). In practice, this translates to more predictable energy production in real-world conditions.

Available in the range are also bifacial versions, capable of further harnessing reflected light from the ground – a clear advantage on white membrane roofs, gravel surfaces, or elevated setups. Designed for high reliability and compatibility with standard design infrastructure, they simplify selection for PV farms, warehouses, industrial facilities, and large commercial roofs. The Hyper B72 series stands out with its approach of 'more energy from the same footprint' without complicating the design, setting it apart from many series focused solely on catalog parameters.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)645 Wp
Module Efficiency23.88%
Voltage at Max Power (Vmpp)45.05 V
Current at Max Power (Impp)14.32 A
Open Circuit Voltage (Voc)53.70 V
Short Circuit Current (Isc)15.06 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.260%/°C
Temp. Coeff. Voc-0.220%/°C
Temp. Coeff. Isc0.050%/°C
NOCT44°C
Cell Technology
Cell TypeMonocrystalline
Cell Count144
BifacialNo
Bifaciality Factor-
Dimensions & Weight
Length2382 mm
Width1134 mm
Height30 mm
Weight27.6 kg
Area2.70 m²
Power Density238.8 Wp/m²
Warranty
Product Warranty15 years
Performance Warranty30 years
End-of-Warranty Output88.8%
First Year Degradation1.00%
Annual Degradation0.35%/year
Key Specifications
23.88%
Efficiency
645 Wp
Power
-0.26%/°C
Temp Coeff
30 yrs
Warranty
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