Description

Longi 620w Solar Panel

• About the LONGi 620w Bi-facial Hi-MO Solar Panel

  The LONGi 620w Bi-facial Hi-MO Solar Panel is a high-performance, utility‑grade photovoltaic module designed for large‑scale solar installations, commercial rooftops, and ground‑mounted solar farms. It belongs to the Hi‑MO 7 series and represents one of the most powerful single solar modules on the market — combining high wattage output, bifacial energy capture, and robust build quality for long-term reliability.

  Detailed Features

  • High Output Power — 620 W Nominal
    • Produces up to 620 watts under standard test conditions, meaning fewer panels are needed to reach a given system capacity.
  • Bifacial Design for Dual‑Side Energy Capture
    • Uses bifacial solar cell technology: panel captures sunlight on both the front and rear surfaces. Rear surface can absorb light reflected from the ground or surrounding surfaces, boosting overall energy yield.
    • Under optimal conditions (high‑albedo surfaces, proper tilt/height), rear-side gain can increase total yield by ~10–25% compared to monofacial modules.
  • Advanced Cell Technology – HPDC / Half‑Cell:
    • Employs LONGi’s HPDC (High Performance Dual-Cell) solar cell technology and half-cell construction. This reduces resistive and shading losses, improves performance under real-world conditions (low light, partial shading), and enhances durability.
    • Improves reliability for long-term solar investment, ensuring stable output over years of operation.
  • Robust Thermal & Weather Performance:
    • Good temperature coefficient (≈ –0.28%/°C), meaning less performance loss in high ambient temperatures — beneficial in hot climates.
    • Mechanically strong: designed to withstand static front loads up to 5,400 Pa, rear loads up to 2,400 Pa — robust against wind, snow (or heavy rain), hail, and other environmental stresses.
  • Durable Construction & Long-Term Warranty:
    • Dual-glass (or high-spec toughened glass + frame) build, anodised aluminium frame, IP68 junction box and reinforced cabling ensure long life and protection against weather, dust, and moisture.
    • Comes with LONGi’s standard 12-year materials & workmanship warranty and a 30‑year linear power output warranty (i.e. guaranteed long-term degradation rate).

  Technical Specifications

  Mechanical Parameters

  • Cell Orientation: 132 (6×22)
  • Junction Box: IP68, three diodes
  • Output Cable: 4mm², +400, -200mm/±1400mm
  • Glass: Dual glass. 2.0±2.0mm semi-tempered glass
  • Frame: Anodized aluminium alloy fray

  Electrical Characteristics

  • Module Type: LR8-66HGD-620M
  • Testing Condition: STC
  • Maximum Power (Pmax.): 620W
  • Open Circuit Voltage: 48..78V
  • Short Circuit Current: 16.05A
  • Voltage at Maximum Power: 40.91V
  • Current at maximum Power: 15.16A
  • Module Efficiency: 23.0%

  Operating Parameters

  • Operational Temperature: -40°C~+85°C
  • Power Output: Tolerance: 0~3%
  • Voc and Isc Tolerance: ±3%
  • Maximum System Voltage: DC1500C (IEC/UL)
  • Maximum Series Fuse Rating: 35A
  • Nominal Operating Cell Temperature: 45±2°C
  • Protection: Class: Class II
  • Bifaciality: 80±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 of 23m/s

  Temperature Ratings (STC)

  • Temperature Coefficient of Isc: +0.045%/°C
  • Temperature Coefficient of Voc: -0.230%/°C
  • Temperature Coefficient of Pmax: -0.28%/°C

  Applications of th LONGi 620w Bi-facial Hi-MO Solar Panel

  • Utility‑scale solar farms – Where large capacity and high efficiency reduce land and BOS costs.
  • Commercial rooftop installations – Where area is limited and higher wattage modules maximise output.
  • Ground‑mounted solar systems with rear‑side reflection – To leverage bifacial gain from albedo surfaces (white roofs, reflective ground cover).
  • High‑performance PV systems in hot climates – Low temperature coefficient supports stable output in high ambient temps.

See DATASHEET