635W Longi Bifacial Solar Panel LR8-66HTD

The LONGi LR8-66HTD-635M 635W Bifacial Solar Panel is a premium high-efficiency solar module engineered for commercial, industrial, agricultural, and utility-scale solar projects. As part of the advanced Hi-MO X6 Max Scientist Series, this module combines cutting-edge BC Cell technology with bifacial power generation to deliver exceptional energy yields, improved system performance, and long-term reliability. 

Designed to maximize energy production, the LR8-66HTD-635M delivers an impressive 635W power output with module efficiency of up to 23.51%. Its bifacial dual-glass construction allows the panel to capture sunlight from both the front and rear sides, increasing total energy generation and improving the return on investment for solar installations. 

The advanced BC Cell architecture reduces operating temperatures while enhancing performance under real-world conditions. Combined with LONGi's industry-leading low degradation rates, this module ensures consistent, reliable power generation over decades of operation. With less than 1% degradation in the first year and only 0.35% annual degradation thereafter, the LR8-66HTD-635M is built to deliver superior lifetime energy production. 

Key Features

• High-performance 635W bifacial solar panel for commercial and utility-scale applications.
• Up to 23.51% module efficiency for maximum energy generation. 
• Advanced BC Cell technology for higher efficiency and lower operating temperatures.
• Bifacial design captures reflected sunlight from the rear side for additional energy production.
• Durable dual-glass construction provides enhanced strength and long-term reliability.
• Less than 1% first-year power degradation. 
• Only 0.35% annual power degradation from years 2 to 30. 
• Excellent resistance to harsh weather, including wind, snow, and hail. 
• Compatible with 1500V DC systems for reduced balance-of-system costs. 
• Backed by a 15-year product warranty and 30-year linear performance warranty. 

Technical Specifications

• Model: LR8-66HTD-635M
• Rated Power: 635W
• Module Efficiency: 23.51%
• Open Circuit Voltage (Voc): 49.42V
• Short Circuit Current (Isc): 16.30A
• Voltage at Maximum Power (Vmp): 40.68V
• Current at Maximum Power (Imp): 15.61A
• Cell Configuration: 132 Cells (6 × 22)
• Dimensions: 2382 × 1134 × 30 mm
• Weight: 33.5 kg
• Glass Type: Dual Glass 2.0 + 2.0 mm Semi-Tempered Glass
• Maximum System Voltage: 1500V DC
• Maximum Series Fuse Rating: 35A
• Operating Temperature Range: -40°C to +85°C
• Front Load Capacity: 5400Pa
• Rear Load Capacity: 2400Pa
• Protection Class: Class II
• Fire Rating: IEC Class C

Ideal Applications

The LONGi LR8-66HTD-635M is ideal for solar farms, industrial facilities, warehouses, commercial buildings, agricultural installations, carport systems, and large-scale rooftop solar projects where maximum power output, durability, and long-term performance are essential. 

Why Choose the LONGi LR8-66HTD-635M?

LONGi is globally recognized for manufacturing high-performance solar modules that combine innovation, reliability, and outstanding energy production. The LR8-66HTD-635M delivers higher energy yields through advanced BC Cell technology and bifacial power generation while maintaining exceptional durability through its dual-glass construction. This makes it an ideal choice for professional installers, EPC contractors, businesses, and investors seeking premium solar technology and long-term value.