About the LONGi 620w Bi-facial Hi-MO Solar Panel
The LONGi 635W Bifacial Hi-MO Solar Panel is a premium, next-generation photovoltaic module engineered for superior energy generation, durability, and long-term performance. Designed using advanced cell technology and bifacial architecture, this panel captures sunlight from both the front and rear sides—significantly increasing total energy yield and reducing overall system costs.
Detailed Features
- High Output Power — 635 W Nominal
- Produces up to 620 watts under standard test conditions, meaning fewer panels are needed to reach a given system capacity.
- Advanced Bifacial Technology
- Dual-sided energy generation
- Up to 15–25% additional energy gain depending on installation
- Higher lifetime energy yield
- High-Efficiency Cell Technology
- Built with advanced N-type / back-contact (BC) or HPBC cell technology, this panel delivers improved performance and reduced energy loss.
- Enhanced light absorption and efficiency
- Strong low-light generation
- Reduced degradation over time
- Durable Dual-Glass Construction
- The panel features a robust dual-glass design, providing added strength, protection, and longevity.
- IP68-rated junction box for weather protection
- High resistance to moisture, dust, and harsh environments
- Suitable for extreme weather conditions
- Built for Reliability & Long Lifespan
- LONGi panels are engineered for long-term performance with industry-leading warranties and minimal degradation.
- Up to 30-year linear power warranty
- Low annual degradation rate (~0.35–0.4%)
- Strong mechanical load resistance (wind, snow, hail)
Technical Specifications
Mechanical Parameters
- Cell Orientation: 132 (6×22)
- Junction Box: IP68, three diodes
- Output Cable: 4mm², +400, -200mm/±1400mm
- Glass: Dual glass. 2.0±2.0mm semi-tempered glass
- Frame: Anodized aluminium alloy fray
Electrical Characteristics
- Module Type: LR8-66HTD-635M
- Testing Condition: STC
- Maximum Power (Pmax.): 635W
- Open Circuit Voltage: 49.42V
- Short Circuit Current: 16.30A
- Voltage at Maximum Power: 40.68V
- Current at maximum Power: 15.61A
- Module Efficiency: 23.51%
Operating Parameters
- Operational Temperature: -40°C~+85°C
- Power Output: Tolerance: 0~3%
- Maximum System Voltage: DC1500C (IEC)
- Maximum Series Fuse Rating: 35A
- Nominal Operating Cell Temperature: 45±2°C
- Protection: Class: Class II
- Bifaciality: 70±5%
- Fire Rating: IEC Class C
Mechanical Loading
- Front Side Maximum Static Loading: 5400Pa
- Rear Side Maximum Static Loading: 2400Pa
- Hailstone Test: 25mm Hailstone at the of 23m/s
Temperature Ratings (STC)
- Temperature Coefficient of Isc: +0.050%/°C
- Temperature Coefficient of Voc: -0.230%/°C
- Temperature Coefficient of Pmax: -0.280%/°C
Applications of the LONGi 635w Bi-facial Hi-Mo Solar Panel
- Residential rooftop solar systems
- Commercial and industrial installations
- Ground-mounted solar arrays
- Solar farms and utility-scale projects
- Agricultural and off-grid systems