Description

Hanwha Qcells Q.TRON XL-G2.3/BFG 645W N-Type Bifacial Glass-Glass Solar Panel

The Qcells Solar Q.TRON XL-G2 BFG 645W (Q.TRON XL-G2.3/BFG 645) is an N-type bifacial glass-glass solar panel from the Qcells Q.TRON XL-G2 series, built for commercial, industrial, and utility-scale projects. It delivers 645W at a minimum module efficiency of 23.1% from 6 × 26 monocrystalline Q.ANTUM NEO solar half cells, with 2.0 mm thermally pre-stressed front glass and 2.0 mm semi-tempered back glass.

Bifacial Q.ANTUM NEO cells let the Qcells Solar Q.TRON XL-G2 BFG 645W use light shining on the module rear side, and Qcells quotes a bifacial energy yield gain of up to 21%. The double glass design supports a 12-year product warranty and an improved 30-year performance warranty.

Qcells Solar Q.TRON XL-G2 BFG 645W High-Efficiency Performance

At Standard Test Conditions the Qcells Solar Q.TRON XL-G2 BFG 645W delivers a minimum of 645W with a power tolerance of +5 W / −0 W, so every module meets or exceeds its nameplate.

• Power at MPP (Pmpp): 645W
• Module Efficiency: ≥ 23.1%
• Power Tolerance: +5 W / −0 W
• Cells: 6 × 26 (156) monocrystalline Q.ANTUM NEO solar half cells
• Bifaciality (φPmpp): 0.80 ± 0.05

Q.ANTUM NEO N-Type Cell Technology

Q.ANTUM NEO is Qcells’ N-type cell technology. The Qcells Solar Q.TRON XL-G2 BFG 645W keeps more of its output in heat thanks to a −0.29 %/K temperature coefficient of Pmpp, and the datasheet credits it with excellent low-light and temperature behavior.

• Temperature Coefficient of Pmpp (γ): −0.29 %/K
• Temperature Coefficient of Voc (β): −0.24 %/K
• Temperature Coefficient of Isc (α): +0.04 %/K

Qcells Solar Q.TRON XL-G2 BFG 645W Bifacial Energy Gain

Qcells rates the Qcells Solar Q.TRON XL-G2 BFG 645W at Bifacial Nameplate Irradiance (BNPI: front 1000 W/m², rear 135 W/m²). Minimum performance at BNPI:

• Power at MPP (Pmpp): 714.2 W
• Short Circuit Current (Isc): 15.57 A
• Open Circuit Voltage (Voc): 58.31 V
• Current at MPP (Impp): 14.74 A
• Voltage at MPP (Vmpp): 48.46 V

Qcells Solar Q.TRON XL-G2 BFG 645W Electrical Data

Minimum performance at Standard Test Conditions (1000 W/m², 25 ± 2 °C, AM 1.5):

• Power at MPP (Pmpp): 645W
• Short Circuit Current (Isc): 14.05 A
• Open Circuit Voltage (Voc): 58.07 V
• Current at MPP (Impp): 13.31 A
• Voltage at MPP (Vmpp): 48.47 V
• Efficiency: ≥ 23.1%

Properties for system design:

• Maximum System Voltage: 1500 V
• Maximum Series Fuse Rating: 30 A DC
• PV Module Classification: Class II
• Fire Rating based on ANSI / UL 61730: C / TYPE 29
• Max. Push Load, Test / Design: 113 lbs/ft² (5400 Pa) / 75 lbs/ft² (3600 Pa)
• Max. Pull Load, Test / Design: 78 lbs/ft² (3750 Pa) / 52 lbs/ft² (2500 Pa)
• Permitted Module Temperature: −40 °F up to +158 °F (−40 °C up to +70 °C)

Durable Module Construction

Mechanical specification of the Qcells Solar Q.TRON XL-G2 BFG 645W from the Qcells datasheet:

• Format: 96.9 × 44.6 × 1.38 in including frame (2462 × 1134 × 35 mm)
• Weight: 78.0 lbs (35.4 kg)
• Front Cover: 0.08 in (2.0 mm) thermally pre-stressed glass with anti-reflection technology
• Back Cover: 0.08 in (2.0 mm) semi-tempered glass
• Frame: Anodized aluminum
• Junction Box: 53-101 × 32-60 × 15-18 mm, protection class IP68, with bypass diodes
• Cable: 4 mm² solar cable; (+) ≥ 29.5 in (750 mm), (−) ≥ 13.8 in (350 mm)
• Connector: Stäubli PV-K(S/B)T4-EVO 2A; IP68

Installation & System Design

Use the 58.07 V open-circuit voltage and the temperature coefficients above to size strings for the Qcells Solar Q.TRON XL-G2 BFG 645W against your inverter MPPT window and maximum input voltage. Installation instructions in the Qcells installation manual must be followed for clamping, mounting, and grounding.

Ideal Applications

Qcells lists the Qcells Solar Q.TRON XL-G2 BFG 645W as the ideal solution for:

• Rooftop arrays on commercial / industrial buildings
• Ground-mounted solar power plants
• Solar power plants with trackers

Qcells Solar Q.TRON XL-G2 BFG 645W Warranty & Certifications

• 12-year product warranty
• 30-year performance warranty: at least 98.5% of nominal power during the first year, then max. 0.33% degradation per year; at least 95.53% up to 10 years and at least 88.93% up to 30 years
• UL 61730-1 & UL 61730-2, CE-compliant, IEC 61215:2021, IEC 61730:2023

Full warranties are in accordance with the warranty terms of the Qcells sales organization of your respective country.

Related Qcells Modules

Other wattages in the same series:

• Hanwha Qcells Q.TRON XL-G2.3/BFG 635W N-Type Bifacial Glass-Glass Solar Panel
• Hanwha Qcells Q.TRON XL-G2.3/BFG 640W N-Type Bifacial Glass-Glass Solar Panel

More new Qcells modules:

• Hanwha Qcells Q.TRON BLK M-G2+ 420W All-Black N-Type Residential Solar Panel
• Hanwha Qcells Q.TRON BLK M-G2+ 425W All-Black N-Type Residential Solar Panel
• Hanwha Qcells Q.TRON BLK M-G2+ 440W All-Black N-Type Residential Solar Panel
• Hanwha Qcells Q.TRON BLK M-G2+/AC 440W AC Solar Module with Integrated Microinverter

Available now from AmeriSol:

• Hanwha Qcells Q.TRON BLK M-G2+ 435W All-Black N-Type Solar Panel
• Hanwha Qcells Q.TRON BLK M-G2+ 430W All-Black N-Type Solar Panel
• Hanwha Qcells Q.TRON Duo XL-G2 BFG 630W N-Type Bifacial Solar Panel
• Hanwha Qcells Q.TRON Duo XL-G2 BFG 625W N-Type Bifacial Solar Panel

Browse all PV modules in the AmeriSol catalog, or visit the official Qcells Q.TRON XL-G2/BFG page.

Datasheet

Download the Hanwha Qcells Q.TRON XL-G2/BFG series 620–645 Wp (2026-08 Rev12 NA) datasheet (PDF)

Availability & Pricing

Contact AmeriSol Energy Solutions for current Qcells Solar Q.TRON XL-G2 BFG 645W availability, lead times, pallet and truckload quantities, and project pricing. Share your project location and target delivery window so the team can confirm the configuration and freight that fit your schedule.

Why Choose the Qcells Solar Q.TRON XL-G2 BFG 645W?

The Qcells Solar Q.TRON XL-G2 BFG 645W combines bifacial Q.ANTUM NEO half cells, 2.0 mm double glass, and a 30-year performance warranty. Choose it when your project calls for 645W-class output at 23.1% efficiency and dependable procurement through AmeriSol Energy Solutions.

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