615W Longi Bifacial LR8-66HGD

The Longi LR866HGD 615W Bifacial Solar Module is a utility grade, high performance panel engineered for maximum energy yield and long term reliability. Built with dual glass construction, half cut HPDC cell technology, and a bifaciality rating of 80±5%, this module is designed to deliver superior output in high temperature, low light, and reflective surface environments. 

With a 12 year material and processing warranty and a 30 year linear power output warranty, the Longi 615W LR866HGD is ideal for developers, EPCs, and commercial installations seeking high yield and long term durability. 

Key Features

High Power Output and Conversion Efficiency

• Maximum power: 615W
• Module efficiency: 22.8%
• Low temperature coefficient of Pmax: 0.280%/°C, ensuring stronger performance in hot climates 
• Rear side gain potential up to 25%, increasing total delivered energy depending on installation conditions 

Advanced Bifacial Dual Glass Design

• Dual glass construction (2.0mm + 2.0mm) increases durability and reduces PID susceptibility
• Bifaciality rating: 80±5%, capturing additional reflected and diffuse light for higher production 
• Ideal for ground mount systems, trackers, and high albedo surfaces

Industry Leading Durability

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

Technical Specifications

Electrical (STC) – LR866HGD615M

• Power (Pmax): 615W
• Open Circuit Voltage (Voc): 48.58V
• Short Circuit Current (Isc): 16.00A
• Voltage at Maximum Power (Vmp): 40.71V
• Current at Maximum Power (Imp): 15.11A 

Electrical (NOCT)

• Pmax: 468.1W
• Voc: 46.17V
• Isc: 12.85A
• Vmp: 38.69V
• Imp: 12.10A 

Mechanical

• Dimensions: 2382 × 1134 × 30 mm
• Weight: 33.5 kg
• Glass: Dual 2.0mm heat strengthened
• Frame: Anodized aluminium alloy
• Junction Box: IP68, three diodes
• Packaging: 36 pcs per pallet / 144 pcs per 20’ GP 

Operating Conditions

• Operating temperature: 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 615W LR866HGD is suitable for:

• Utility scale solar farms
• Commercial and industrial rooftops
• Solar tracking systems
• Carports and agrivoltaic installations
• High albedo and reflective installations requiring maximum bifacial gain

Why Choose the Longi LR866HGD 615W?

This model combines high power output, top tier thermal performance, and bifacial energy gain with robust certification and long term durability. Its dual glass, half cut design ensures stable, efficient production in harsh climates and demanding industrial environments.