635W Longi Hi-Mo9 Bifacial LR8-66HYD

The LONGi Hi-MO 9 LR8-66HYD-635M is a high-performance 635W bifacial solar panel engineered for utility-scale, commercial, industrial, and large residential solar installations. Featuring LONGi's advanced Back Contact (BC) cell technology, this module delivers outstanding energy generation, enhanced efficiency, and superior long-term reliability. With a module efficiency of up to 23.5%, the Hi-MO 9 series is designed to maximize power output and reduce the levelized cost of electricity (LCOE). 

Its bifacial dual-glass construction captures sunlight from both the front and rear sides of the module, increasing total energy yield when installed over reflective surfaces. Designed to perform in harsh environmental conditions, the panel incorporates LONGi's Sea-Shield technology, weather-resistant dual glass, and a corrosion-resistant aluminum frame, making it suitable for coastal, high-humidity, and high-salinity installations. 

The LR8-66HYD-635M is built for long-term energy production with less than 1% first-year degradation and only 0.35% annual degradation from years 2 to 30. Backed by a 12-year product warranty and a 30-year linear power output warranty, this solar module provides exceptional value and dependable performance over its lifetime. 

Key Features

• Rated Power Output: 635W 
• Model: LONGi Hi-MO 9 LR8-66HYD-635M 
• Advanced BC (Back Contact) Cell Technology
• Bifacial Dual-Glass Design for Increased Energy Yield
• Module Efficiency: 23.5%
• Positive Power Tolerance: 0~3% 
• Maximum System Voltage: 1500V DC 
• Maximum Series Fuse Rating: 35A
• Less Than 1% First-Year Power Degradation 
• Only 0.35% Annual Degradation (Years 2–30) 
• Sea-Shield Corrosion Protection for Coastal Applications 
• Front Load Rating: 5400Pa 
• Rear Load Rating: 2400Pa
• Operating Temperature Range: -40°C to +85°C 
• IEC, UL, ISO Certified
• 12-Year Product Warranty and 30-Year Performance Warranty 

Technical Specifications

• Maximum Power (Pmax): 635W 
• 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 
• Module Efficiency: 23.5% 
• Dimensions: 2382 × 1134 × 30mm
• Weight: 41.6kg
• Cell Configuration: 132 Cells (6 × 22) 
• Bifaciality Factor: 75% ± 5% 
• Nominal Operating Cell Temperature (NOCT): 45 ± 2°C 
• Protection Class: Class II 

Applications

The LONGi Hi-MO 9 635W Bifacial Solar Panel is ideal for:

• Utility-scale solar farms
• Commercial and industrial rooftop systems
• Ground-mounted solar energy projects
• Agricultural solar installations
• Coastal and high-corrosion environments
• High-efficiency renewable energy systems

Why Choose the LONGi Hi-MO 9 635W?

The LONGi LR8-66HYD-635M combines cutting-edge BC cell technology, bifacial energy generation, exceptional durability, and industry-leading performance. Designed to maximize energy production while reducing operating costs, it is an ideal solution for professional solar installers, EPC contractors, and businesses seeking reliable, long-term solar power generation.