620W Longi Solar Panel Hi-MO 7 LR8-66HGD

The Longi LR866HGD 620W Bifacial Solar Module is engineered for large scale, commercial, and industrial solar installations requiring maximum energy yield, long term performance, and industry leading durability. Built with dual glass construction, half cut HPDC cell technology, and a high bifaciality rating of 80±5%, this module delivers exceptional output even in high?temperature or low light environments.

Designed for utility grade reliability, the 620W LR866HGD provides a 12 year product warranty and a 30 year power output warranty, making it a long term investment for organisations focused on energy efficiency and low Levelized Cost of Energy (LCOE).

Key Features

Ultra High Power Output

• Maximum power: 620W
• Module efficiency: 23.0%
• Rear?side gain up to 25%, boosting total system yield
• Low temperature coefficient of Pmax: 0.280%/°C for improved hot climate performance

Advanced Bifacial Technology

• Dual glass (2.0mm + 2.0mm) construction increases structural strength and reduces PID risk
• Bifaciality: 80±5%, enabling significant energy gains from reflected and diffuse light
• Ideal for ground mount, tracking systems, and high albedo surfaces

Durable, Utility Scale Build Quality

• Mechanical load ratings:
  • 5400Pa front side
  • 2400Pa rear side
• Hail-resistant: tested with 25mm hailstones at 23m/s
• Certified to leading global standards:
  IEC 61215, IEC 61730, UL 61730, ISO9001, ISO14001, ISO45001, IEC62941

Technical Specifications

Electrical (STC)

• Power (Pmax): 620W
• Open Circuit Voltage (Voc): 48.78V
• Short Circuit Current (Isc): 16.05A
• Voltage at Maximum Power (Vmp): 40.91V
• Current at Maximum Power (Imp): 15.16A

Mechanical

• Dimensions: 2382 × 1134 × 30 mm
• Weight: 33.5 kg
• Frame: Anodized aluminium alloy
• Junction box: IP68, three diode design
• Packaging: 36 pcs per pallet / 144 pcs per 20’GP

Operating Conditions

• Temperature range: 40°C to +85°C
• Maximum system voltage: 1500V DC
• Maximum series fuse rating: 35A
• First year degradation: <1%
• Annual degradation (Years 2–30): 0.4%

Applications

The Longi 620W LR866HGD is ideal for:

• Utility scale solar farms
• Commercial and industrial rooftops
• Solar tracking systems
• Carports and agrivoltaic installations
• Projects requiring long term reliability under harsh environmental conditions

Why Choose the Longi LR866HGD 620W Module?

This module delivers superior performance, exceptionally high efficiency, and long term durability supported by one of the strongest warranties in the solar sector. With bifacial generation, robust design, and HPDC half cell technology, it consistently outperforms conventional panels in real world conditions.