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LONGi 620W Bifacial Double-Glass Solar Panel
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☀️ LONGi Hi-MO X10 620W Bifacial Double-Glass Solar Panel
Brand: LONGi
Model: LR8-66HGD-620M
Series: Hi-MO X10
Type: N-Type Bifacial Double-Glass Solar PV Module
Cell Technology: HPBC 2.0 (Hybrid Passivated Back Contact) N-Type Monocrystalline
Application: Utility-scale, commercial & industrial solar PV systems
⚡ Key Features
- 620 W rated output with 23.0% module efficiency for exceptional power density
- HPBC 2.0 back-contact cell technology delivers higher energy yield, improved reliability, and superior shading performance
- Bifacial energy generation with 80 ± 5% bifaciality captures reflected sunlight for increased total energy production
- Double-glass construction using 2.0 mm + 2.0 mm heat-strengthened glass for outstanding durability and environmental protection
- Excellent long-term reliability with less than 1% first-year degradation and only 0.4% annual degradation from years 2–30
- Optimised for 1500 V DC systems to support longer strings and lower balance-of-system (BOS) costs
- Heavy-duty mechanical design rated for 6000 Pa front and 3000 Pa rear static loads
- Edge frame design improves installation efficiency and is compatible with automated installation robots
- Low temperature coefficient (-0.280%/°C) ensures excellent performance in high-temperature climates
- Suitable for high-dust and demanding environmental conditions
📐 Technical Specifications
| Specification | Value |
|---|---|
| Model | LR8-66HGD-620M |
| Rated Power (Pmax) | 620 W |
| Module Type | Bifacial Double-Glass |
| Cell Technology | HPBC 2.0 N-Type Monocrystalline |
| Cell Orientation | 132 Cells (6 × 22 Half-Cell) |
| Module Efficiency | 23.0% |
| Maximum Power Voltage (Vmp) | 40.91 V |
| Maximum Power Current (Imp) | 15.16 A |
| Open Circuit Voltage (Voc) | 48.78 V |
| Short Circuit Current (Isc) | 16.05 A |
| Bifaciality | 80 ± 5% |
| Maximum System Voltage | 1500 V DC (IEC/UL) |
| Maximum Series Fuse Rating | 35 A |
| Power Tolerance | 0 ~ +3% |
| Temperature Coefficient (Pmax) | -0.280% / °C |
| Temperature Coefficient (Voc) | -0.230% / °C |
| Temperature Coefficient (Isc) | +0.045% / °C |
| Nominal Operating Cell Temperature (NOCT) | 45 ± 2 °C |
| Operating Temperature Range | -40 °C to +85 °C |
| Front / Rear Glass | 2.0 mm + 2.0 mm Heat-Strengthened Glass |
| Frame | High-Strength Aluminium Frame |
| Junction Box | IP68, 3 Diodes |
| Output Cable | 4 mm², +400 / -200 mm (Customisable ±1400 mm) |
| Front Side Maximum Static Load | 6000 Pa |
| Rear Side Maximum Static Load | 3000 Pa |
| Hail Resistance | 25 mm Hail at 23 m/s |
| Protection Class | Class II |
| Fire Rating | UL Type 29 / IEC Class C |
| Dimensions | 2382 × 1134 × 30 mm |
| Weight | 34.7 kg |
🏡 Benefits
- Higher energy generation through advanced HPBC 2.0 and bifacial technology
- Industry-leading 23.0% module efficiency for improved system performance
- Outstanding durability with 6000 Pa front and 3000 Pa rear mechanical load ratings
- Designed for harsh environments, including high-dust, high-wind, and heavy snow regions
- Lower Levelised Cost of Energy (LCOE) through higher power output and lower BOS costs
- Excellent long-term performance with <1% first-year degradation and 0.4% annual degradation thereafter
- Compatible with modern automated installation systems for faster project deployment
🏷️ Ideal For
- Utility-scale solar farms
- Commercial & industrial rooftop PV systems
- Ground-mounted solar installations
- Fixed-tilt and single-axis tracker systems
- High-performance grid-tied solar projects
- Large-scale renewable energy projects requiring maximum efficiency and long-term reliability
🏷️ Certifications
- IEC 61215
- IEC 61730
- UL 61730
- ISO 9001:2015 Quality Management System
- ISO 14001:2015 Environmental Management System
- ISO 45001:2018 Occupational Health & Safety Management System
- IEC 62941 Module Design Qualification & Type Approval
🏷️ Quality & Support
The LONGi Hi-MO X10 LR8-66HGD-620M represents LONGi's latest generation of high-performance bifacial solar technology, combining HPBC 2.0 N-Type back-contact cells with a robust double-glass architecture to maximise efficiency, reliability, and lifetime energy production. Engineered for utility-scale and commercial solar projects, it delivers 620 W of power, 23.0% module efficiency, exceptional mechanical strength, and industry-leading degradation performance.
Backed by a 12-year product warranty and 30-year linear power output warranty, the module guarantees 99% power retention after the first year and 87.4% output after 30 years, making it an outstanding choice for long-term, high-return solar installations.
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