LONGi Hi-MO 7 LR7-72HGD-620M 620W Bifacial Solar Panel

The LONGi Hi-MO 7 LR7-72HGD-620M is a premium 620W bifacial dual-glass solar panel engineered for high-capacity commercial, industrial, and utility-scale photovoltaic systems.

Built using LONGi’s advanced HPDC cell technology, the module delivers high conversion efficiency, excellent bifacial performance, reduced temperature-related losses, and reliable long-term power generation. Its high-output design helps reduce the number of panels required for large solar projects while maximising energy production from the available installation area.

High 620W Power Output

The LR7-72HGD-620M provides a rated maximum power output of 620W with a module efficiency of 23.0%.

Electrical Performance at STC

• Rated maximum power: 620W
• Module efficiency: 23.0%
• Voltage at maximum power: 44.33V
• Current at maximum power: 13.99A
• Open-circuit voltage: 52.77V
• Short-circuit current: 14.85A
• Positive power tolerance: 0 to +3%

The high power density makes this module suitable for projects where strong system output and efficient use of mounting space are important.

Advanced HPDC Cell Technology

LONGi’s advanced HPDC cell technology is designed to provide superior module efficiency and dependable energy production.

Its half-cell configuration helps reduce operating temperature and electrical losses while improving performance under real-world conditions.

Main Performance Benefits

• High power conversion efficiency
• Lower operating temperature
• Excellent low-light performance
• Reduced temperature-related power losses
• Strong long-term energy yield
• Improved performance in hot climates
• Stable power production throughout the day

Bifacial Power Generation

The module can generate electricity from both the front and rear surfaces. Direct sunlight is converted on the front side, while reflected light reaching the rear side contributes additional energy.

The panel has a stated bifaciality of 80% ±5%. Actual rear-side gain depends on:

• Surface reflectivity
• Mounting height
• Row spacing
• Panel tilt angle
• Rear-side shading
• Ground conditions
• Installation design

This bifacial technology can increase total system yield compared with conventional monofacial modules when installed under suitable conditions.

Durable Dual-Glass Construction

The solar cells are protected by 2.0mm front glass and 2.0mm rear glass, creating a strong dual-glass module structure.

The panel also features an anodised aluminium alloy frame and an IP68 junction box with three bypass diodes.

Mechanical Construction

• Cell orientation: 144 cells, 6 × 24
• Glass: 2.0mm + 2.0mm heat-strengthened dual glass
• Frame: Anodised aluminium alloy
• Junction box: IP68 with three diodes
• Cable cross-section: 4mm²
• Dimensions: 2382 × 1134 × 30mm
• Weight: 33.5kg

Excellent High-Temperature Performance

The module has a maximum-power temperature coefficient of -0.280% per °C. This helps reduce output losses as panel temperature increases, making it suitable for hot and sunny environments.

Temperature Coefficients

• Temperature coefficient of Pmax: -0.280%/°C
• Temperature coefficient of Voc: -0.230%/°C
• Temperature coefficient of Isc: +0.045%/°C
• Operating temperature: -40°C to +85°C

Strong Mechanical Load Resistance

The LONGi Hi-MO 7 module is engineered to withstand demanding environmental conditions when correctly mounted.

• Maximum front static load: 5400Pa
• Maximum rear static load: 2400Pa
• Hail resistance: 25mm hailstone at 23m/s

This makes it suitable for exposed commercial rooftops, ground-mounted solar farms, and large-scale outdoor installations.

Suitable for High-Voltage PV Systems

The panel supports photovoltaic systems operating at up to 1500V DC, allowing efficient string design for large commercial and utility-scale projects.

Operating Parameters

• Maximum system voltage: 1500V DC
• Maximum series fuse rating: 30A
• Protection class: Class II
• Nominal operating cell temperature: 45°C ±2°C
• Bifaciality: 80% ±5%

Key Features

• 620W rated maximum output
• 23.0% module efficiency
• Advanced LONGi HPDC cell technology
• Bifacial front and rear power generation
• Dual-glass module construction
• 144 half-cell configuration
• High bifaciality of 80% ±5%
• Excellent performance in high temperatures
• Strong low-irradiance energy generation
• Positive power tolerance of 0 to +3%
• Maximum system voltage of 1500V DC
• IP68 junction box
• Strong front and rear mechanical load ratings
• Suitable for commercial and utility-scale systems
• Designed for reliable long-term performance

Technical Specifications

Suitable Applications

• Commercial rooftop solar systems
• Industrial solar installations
• Utility-scale solar power plants
• Ground-mounted solar farms
• Agricultural solar projects
• Warehouses and factories
• Solar carports
• High-voltage PV systems
• Bifacial mounting systems
• Large grid-connected solar projects