LONGi 645W Silver Bifacial Photovoltaic Panel

The subject of the sale is a LONGi Hi-MO X10 Explorer photovoltaic panel with a power of 645W in a bifacial version with a double glass structure.

Model from the product card: LR7-72HVD-645M.

Advanced BC-CELL technology, TaiRay wafers and double-sided bifacial construction ensure very high efficiency, higher energy yield and high operational reliability in industrial, commercial and professional PV systems.

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The most important features of the product

• Nominal power 645W
• Two-sided bifacial module
• BC-CELL technology
• TaiRay wafers increasing module reliability
• 144 cells in a 6 × 24 arrangement
• Module efficiency up to 23.9 percent
• Double glass construction – glass 2.0 + 2.0 mm
• Bifaciality 70 ±5 percent
• Additional energy yield from the rear side of the module
• Low degradation – less than 1 percent in the first year, then 0.35 percent per year from years 2 to 30
• Positive power tolerance of 0 to 3 percent
• Lower operating temperature thanks to BC-CELL technology
• Very good performance under high temperature conditions
• Anodized aluminum alloy frame
• IP68 junction box with three diodes
• Mechanical resistance to snow and wind loads
• Manufacturer's warranty of 15 years for the product and 30 years for linear power gain

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Technical specifications

• Model: LONGi LR7-72HVD-645M
• Series: Hi-MO X10 Explorer
• Maximum power: 645 W
• Module efficiency: 23.9%
• Module type: bifacial, double glass
• Number of cells: 144 pieces
• Cell arrangement: 6 × 24
• Technology type: BC-CELL
• Glass construction: dual glass, 2.0 + 2.0 mm semi-tempered glass

• Panel dimensions: 2382 × 1134 × 30 mm
• Panel weight: 33.5 kg
• Frame: anodized aluminum alloy
• Junction box: IP68, three diodes
• Output cable: 4 mm², +400 mm / -200 mm or ±1400 mm, length adjustable

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STC electrical parameters

• Maximum power Pmax: 645 W
• Open-circuit voltage Voc: 53.70 V
• Short-circuit current Isc: 15.17 A
• Operating voltage Vmp: 44.56 V
• Operating current Imp: 14.48 A
• Module efficiency: 23.9%

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NOCT electrical parameters

• Maximum power Pmax: 491.0 W
• Open-circuit voltage Voc: 51.03 V
• Short-circuit current Isc: 12.18 A
• Operating voltage Vmp: 42.35 V
• Operating current Imp: 11.61 A

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Operating parameters

• Operating temperature range: -40°C to +85°C
• Power tolerance: 0 to 3%
• Maximum system voltage: DC 1500V
• Maximum series fuse: 30 A
• Nominal cell operating temperature: 45 ±2°C
• Protection class: Class II
• Bifaciality: 70 ±5%
• Fire rating: UL type 29 / IEC Class C

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Mechanical resistance

• Maximum static load on the front: 5400 Pa
• Maximum static load from the rear: 2400 Pa
• Hail resistance test: 25 mm hail at a speed of 23 m/s

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STC temperature coefficients

• Temperature coefficient Isc: +0.050%/°C
• Temperature coefficient Voc: -0.200%/°C
• Temperature coefficient Pmax: -0.260%/°C

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Additional energy yield from the rear side

Thanks to bifacial technology, the module can generate additional energy from the rear side. For the 645W model, the product card shows the following values ​​with additional yield on the rear side:

• At 5% additional yield: 677 W
• At 10% additional yield: 710 W
• At 15% additional yield: 744 W
• At 20% additional yield: 776 W
• At 25% additional yield: 808 W

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Additional information about the manufacturer

LONGi is one of the largest and most recognizable manufacturers of photovoltaic modules in the world. The Hi-MO X10 Explorer series has been designed for high efficiency, high reliability and stable energy yield for many years of operation.

The LR7-72HVD-645M module is particularly suitable for industrial and commercial installations, on cement roofs and in places exposed to higher operating temperatures.

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Delivery information

• Delivery via a proven transport company
• The product is properly protected during transport