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WERAN 640-670W HPBC 2.0 Bifacial Solar Panel – OEM Back Contact Double-Glass PV Module for Utility and EPC Projects

  • Bifacial, Back Contact, N-type
  • Up to 24.8%
  • 640-670 Wp
  • 32.5 kg

▶ High-efficiency bifacial back-contact module designed for premium distributed solar projects

▶ HPBC 2.0 cell technology delivers higher power output with no front gridlines

▶ High-transparency and low-reflection glass improves anti-glare performance for sensitive installation scenarios

▶ More suitable for industrial and commercial cement roofs, high-temperature rooftops, and distributed PV systems

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  • Technology Bifacial, Back Contact, HPBC 2.0, N-type
  • Power Range 640-670Wp
  • Region China
  • Weight 32.5 kg
  • Product Warranty 15 Years
  • Power Warranty 1 Years of 99 %, 30 Years of 88.85 %
  • Panel Efficiency Up to 24.8%
  • Dimension 2382×1134×30 mm
  • Glass Dual Glass, 2.0+2.0 mm semi-tempered glass
  • Temperature Coefficient of Pmax -0.26 %/°C
  • Cell Orientation132 (6×22)
  • Frame Anodized aluminum alloy frame
  • Junction Box IP68, three diodes
  • Output Cable 4 mm², +400 / -200 mm or ±1400 mm, customizable length
  • Bifaciality 75±5%
  • Temperature Coefficient of Voc -0.200 %/°C
  • Temperature Coefficient of Isc +0.050 %/°C
  • Maximum System Voltage DC1500V
  • Maximum Series Fuse Rating 35A
  • Operational Temperature -40°C ~ +85°C
  • Power Output Tolerance 0 ~ +3%
  • Front Side Maximum Static Loading 5400Pa
  • Rear Side Maximum Static Loading 2400Pa
  • Hailstone Test 25 mm hailstone at 23 m/s
  • Fire Rating IEC Class C

  • HPBC 2.0 back-contact cell technology

  • N-TaiRay wafer platform for enhanced cell reliability

  • 0BB busbar-free design for improved current collection and cleaner module appearance

  • A+ anti-shading capability to reduce energy loss under partial shading

  • No front gridlines for better light absorption and premium aesthetics

  • High-transparency low-reflection glass for improved anti-glare performance

  • Up to 24.8% module efficiency and 670 W high power output

  • Dual-glass bifacial design for higher lifetime energy yield
WERAN 640-670W HPBC 2.0 Bifacial Solar Panel – OEM Back Contact Double-Glass PV Module for Utility and EPC Projects

Additional Value
30-Year Power Warranty

Mechanical Parameters

Cell Orientation 144 (6×24)
Junction Box IP68, three diodes
Output Cable

4mm², +400, -200mm/±1400mm

Length can be customized
Glass Dualglass, 2.0+2.0mm semi-tempered glass
Frame Anodized aluminum alloy frame
Weight 33.5kg
Dimension 2382×1134×30mm
Packaging 36pcs per pallet
144pcs per 20'GP / 720pcs per 40'HC

Electrical Characteristics
STC: AM1.5 1000W/m² 25°C NOCT: AM1.5 800W/m² 20°C 1m/s Test uncertainty for Pmax: ±3%

Module Type LR7-72HVD-640M LR7-72HVD-645M LR7-72HVD-650M LR7-72HVD-655M LR7-72HVD-660M LR7-72HVD-665M
Testing Condition STC NOCT STC NOCT STC NOCT STC NOCT STC NOCT STC NOCT
Maximum Power (Pmax/W) 640 487 645 491 650 495 655 499 660 502 665 506
Open Circuit Voltage (Voc/V) 54.02 51.34 54.12 51.43 54.22 51.53 54.32 51.62 54.42 51.72 54.52 51.81
Short Circuit Current (Isc/A) 14.98 12.03 15.06 12.1 15.14 12.16 15.22 12.22 15.3 12.29 15.35 12.33
Voltage at Maximum Power (Vmp/V) 44.67 42.45 44.77 42.55 44.87 42.64 44.97 42.74 45.07 42.83 45.17 42.93
Current at Maximum Power (Imp/A) 14.33 11.49 14.41 11.55 14.49 11.61 14.57 11.68 14.65 11.75 14.72 11.8
Module Efficiency(%) 23.7 23.9 24.1 24.2 24.4 24.6

Electrical characteristics with different rear side power gain (reference to 665W front)
Pmax /W Voc/V Isc /A Vmp/V Imp/A Pmax gain
688 54.32 15.98 44.97 15.3 5%
721 54.32 16.74 44.97 16.03 10%
755 54.42 17.5 45.07 16.76 15%
788 54.42 18.26 45.07 17.48 20%
821 54.42 19.03 45.07 18.21 25%

Operating Parameters
Operational Temperature -40℃ ~ +85℃
Power Output Tolerance 0 ~ 3%
Maximum System Voltage DC1500V (IEC)
Maximum Series Fuse Rating 30A
Nominal Operating Cell Temperature 45±2℃
Protection Class Class II
Bifaciality 70±5%
Fire Rating UL Type 29
IEC Class C

Mechanical Loading
Front Side Maximum Static Loading 5400Pa
Rear Side Maximum Static Loading 2400Pa
Hailstone Test 25mm Hailstone at the speed of 23m/s

Temperature Ratings (STC)
Temperature Coefficient of Isc +0.050%/°C
Temperature Coefficient of Voc -0.200%/°C
Temperature Coefficient of Pmax -0.260%/°C

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About Us
Weran Solar Co., Ltd.
Weran Solar Co., Ltd.

Weran Solar Co., Ltd. (WERAN) is China Wholesale WERAN 640-670W HPBC 2.0 Bifacial Solar Panel – OEM Back Contact Double-Glass PV Module for Utility and EPC Projects Company and WERAN 640-670W HPBC 2.0 Bifacial Solar Panel – OEM Back Contact Double-Glass PV Module for Utility and EPC Projects Authorized Dealer, founded in 2015 and headquartered in Shanghai, is a global new energy enterprise specializing in the research, development, and application of intelligent solar power generation systems. We integrate product design, manufacturing, sales, installation, and maintenance, delivering reliable and competitive solar solutions to customers worldwide.


Internationally, WERAN supplies high-quality photovoltaic modules to solar projects and distributors across multiple countries — including, but not limited to, Tier 1-equivalent panels with outstanding cost-performance ratios. Leveraging first-hand access to China’s photovoltaic supply chain, we ensure both quality and competitiveness. In the domestic market, our business also covers solar module manufacturing and EPC contracting for new energy projects.

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