Back Contact Solar Cell

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Back Contact Solar Cell
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Brand: 通威 TONGWEI
1.Maximizes light absorption with no front metal contacts, eliminating shading losses and achieving over 23% module efficiency.
2.Uses copper-plated back electrodes instead of silver paste, reducing resistive losses by 15% and enhancing conductivity.
3.Features ultra-low series resistance (<0.5Ω·cm²) through advanced laser-doped contacts, resulting in a fill factor exceeding 92%.
4.Features SiO₂/Al₂O₃ quantum tunneling passivation to minimize surface recombination, boosting open-circuit voltage to ≥720mV.
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Back Contact Solar Panels
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Description

Revolutionary Design & Performance

 

  • 100% Front-Side Light Capture–No front metal contacts eliminate shading losses, maximizing photon absorption for 23%+ module efficiency in this advanced Back Contact Solar Cell.
  • Copper-Plated Back Electrodes–Replaces silver paste, reducing resistive losses by 15% and enhancing conductivity.
  • Ultra-Low Series Resistance–Advanced laser-doped contacts achieve <0.5Ω·cm², improving fill factor (>92%).

 

Advanced Manufacturing Process

 

Quantum Tunneling Passivation–

SiO₂/Al₂O₃ layer minimizes surface recombination, boosting voltage (Voc ≥720mV).

Monolithic Cell Interconnection–

Laser-welded copper ribbons enable <0.2% cell-to-module power loss.

Self-Aligning Laser Patterning–

Sub-20μm precision for backside via holes, ensuring perfect electrode alignment.

 

Unmatched Reliability

 

Salt Mist Certified–Survives 1000+ hours of IEC 61701 testing (Class 1), ideal for coastal installations.

Thermal Cycling Stability–Withstands 600 cycles (-40°C to 85°C) with <2% power degradation.

30-Year Linear Warranty–Guarantees 90% output at 10 years, 82% at 30 years.

 

Smart Integration Features

 

Plug-and-Play Busbars –

Pre-configured connectors enable 30% faster installation vs. conventional modules.

Dynamic Load Optimization –

Embedded sensors auto-adjust string configurations to prevent mismatch losses.

 

Sustainability Leadership

  • Zero Silver Usage– Eliminates 100kg Ag per MW production, cutting supply chain risks.
  • Closed-Loop Recycling–Patented hydrometallurgy recovers 99.9% silicon and 98% copper.

Target Applications

  • Floating Solar Farms–Corrosion-proof design+5% higher yield than PERC in water environments.
  • Vehicle-Integrated PV–Lightweight (18kg/m²) and vibration-resistant for solar cars/boats.
  • Space-Constrained Rooftop – Generates 1.5x more power per m² vs. shingled modules.

 

Why Choose Us?

 

 
 

ISO 18257 certified back contact solar cell production line (100MW annual capacity).

 
 
 

AI-Powered QC detects micro-cracks with 99.99% accuracy.

 
 
 

24/7 Remote Monitoring via integrated IoT modules (4G/Wi-Fi).

 

 

Specification

 

Details

STC

NOCT

Maximum power (Pmax) [W]

640

483.4

Open-circuit voltage(Voc) [V]

44.80

42.20

Operating voltage at maximum power point (Vmp) [V]

37.00

34.46

Short-circuit current (Isc) [A]

18.36

14.80

Operating current at maximum power point (Imp) [A]

17.30

14.03

Dimensions

2384±2×1303±2×35mm

Battery type

Monocrystalline silicon

Arrangement of battery cells

132 pieces [6×22]

Weight

34.2KG

 

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