645W Longi Bifacial Solar Panel LR8-66HVDF-645M

The LONGi LR8-66HVDF-645M 645W Bifacial Solar Panel is part of the latest Hi-MO X10 Guardian Series, designed to deliver exceptional efficiency, enhanced energy yield, and long-term reliability for commercial, industrial, agricultural, and utility-scale solar installations. Featuring advanced HPBC 2.0 cell technology and a bifacial dual-glass design, this high-performance solar module captures sunlight from both the front and rear sides, increasing overall power generation and maximizing return on investment.

With a module efficiency of up to 23.88%, the LR8-66HVDF-645M delivers industry-leading performance while reducing balance-of-system costs. The innovative Guardian Anti-Dust frame design helps minimize dust accumulation, improving energy production by more than 2% compared to conventional module frames in suitable environments. This makes it particularly effective for carports, commercial rooftops, cement roofs, and large-scale solar projects.

The Hi-MO X10 Guardian series also features advanced anti-shading technology that reduces energy losses caused by partial shading while lowering hotspot temperatures, improving operational safety and maintaining higher energy output throughout the life of the system. 

Key Features

• Rated power output of 645W for high-yield solar installations.
• High module efficiency of 23.88% for maximum energy generation.
• Advanced HPBC 2.0 cell technology for superior performance and reliability.
• Bifacial power generation captures reflected light from the rear side for increased energy yield.
• Innovative Guardian Anti-Dust frame design improves performance in dusty environments.
• Enhanced anti-shading technology minimizes losses caused by partial shading. 
• Dual-glass construction for superior durability and weather resistance. 
• Less than 1% first-year degradation and only 0.35% annual degradation from years 2–30.
• 15-year product warranty and 30-year linear power output warranty.
• Designed for 1500V DC solar systems. 

Technical Specifications

• Model: LR8-66HVDF-645M
• Rated Power (Pmax): 645W
• Module Efficiency: 23.88%
• Open Circuit Voltage (Voc): 49.62V
• Short Circuit Current (Isc): 16.46A
• Voltage at Maximum Power (Vmp): 40.88V
• Current at Maximum Power (Imp): 15.78A
• Cell Configuration: 132 Cells (6 × 22)
• Dimensions: 2382 × 1134 × 30 mm
• Weight: 32.5 kg
• Glass Type: Dual Glass 2.0 + 2.0mm Semi-Tempered Glass
• Maximum System Voltage: 1500V DC
• Maximum Series Fuse Rating: 35A
• Operating Temperature: -40°C to +85°C
• Front Static Load: 5400Pa
• Rear Static Load: 2400Pa
• Protection Class: Class II
• Fire Rating: IEC Class C

Ideal Applications

The LONGi LR8-66HVDF-645M is ideal for solar farms, commercial and industrial facilities, agricultural projects, carport installations, large rooftop systems, and ground-mounted solar arrays where maximum energy production, reduced maintenance, and long-term reliability are essential. 

Why Choose the LONGi LR8-66HVDF-645M?

Combining HPBC 2.0 technology, bifacial energy generation, advanced anti-shading protection, and a patented anti-dust frame design, the LONGi 645W Hi-MO X10 Guardian delivers higher energy yields and exceptional long-term performance. Its high efficiency, low degradation rate, and industry-leading warranties make it an excellent choice for professional solar installers, EPC contractors, businesses, and investors seeking premium solar technology.