66QL6-BDX 650-680W

Product Overview

The 66QL6-BDX uses an enhanced N-type TOPCon cell platform with 264 cells in a 66 × 4 layout. The bifacial dual-glass construction captures front-side irradiance and rear-side reflected light, while the low temperature coefficients support stable output in high-temperature operating conditions.

The module is available in seven power classes from 650 W to 680 W, with a 1500 VDC maximum system voltage, IP68 junction box and Class II safety rating. The 2382 × 1134 × 30 mm frame format is intended for utility-scale, commercial rooftop and ground-mount projects.

Key Features

• N-type monocrystalline TOPCon cells with 264 cells (66 × 4)
• Bifacial dual-glass construction with 85 ± 5% bifaciality
• Up to 25.17% module efficiency across the 650-680 W range
• Low Pmax temperature coefficient of -0.26%/°C
• IP68 junction box, Class II safety and Class A IEC fire rating
• 1500 VDC maximum system voltage and 35 A maximum series fuse
• Maximum test static load of 7000 Pa front and 5000 Pa rear
• 55 mm hail impact test; loss reduced by up to 80% in extreme hail conditions
• 12-year material and process warranty with a 30-year linear power warranty
• JK03M / JK03M2 connectors; MC4-EVO2 available on request

Technical Specifications

Electrical Characteristics at STC

Parameter	650	655	660	665	670	675	680
Maximum power – Pmax (Wp)	650	655	660	665	670	675	680
Optimum operating voltage – Vmp (V)	42.57	42.70	42.78	42.85	42.92	43.00	43.07
Optimum operating current – Imp (A)	15.27	15.34	15.43	15.52	15.61	15.70	15.79
Open-circuit voltage – Voc (V)	50.26	50.44	50.50	50.55	50.60	50.65	50.70
Short-circuit current – Isc (A)	15.98	16.04	16.14	16.24	16.34	16.44	16.54
Module efficiency (%)	24.06	24.25	24.43	24.62	24.80	24.99	25.17
Bifaciality	85 ± 5%
Power output tolerance	0 to +3%
Temperature coefficient of Pmax	-0.26%/°C
Temperature coefficient of Voc	-0.24%/°C
Temperature coefficient of Isc	0.046%/°C

Bifacial Output at BNPI

Parameter	650	655	660	665	670	675	680
Maximum power – Pmax (W)	724	729	735	741	746	752	758
Optimum operating voltage – Vmp (V)	42.52	42.69	42.70	42.75	42.80	42.85	42.90
Optimum operating current – Imp (A)	17.04	17.10	17.21	17.32	17.42	17.54	17.64
Open-circuit voltage – Voc (V)	50.38	50.56	50.70	50.75	50.80	50.85	50.90
Short-circuit current – Isc (A)	17.80	17.87	17.98	18.09	18.20	18.31	18.43

Mechanical and Structural Parameters

Parameter	Value
Cell type	N-type monocrystalline
Cell count	264 cells (66 × 4)
Module dimensions	2382 × 1134 × 30 mm
Module weight	38.8 kg
Front glass	2.5 mm high-transmission coated glass
Rear glass	2.5 mm tempered glass
Frame	Anodized aluminium alloy
Junction box	IP68
Safety class	Class II
IEC module fire rating	Class A
Connector type	JK03M / JK03M2 / other; MC4-EVO2 available on request
Output cable	4.0 mm² or greater; (+) 500 mm, (-) 400 mm; customizable

Dimensions and Mounting

Parameter	Value
Module length	2382 ± 2 mm
Module width	1134 ± 2 mm
Module thickness	30 ± 1 mm
Long-side mounting-hole spacing	1400 ± 1 mm; 790 ± 1 mm; 400 ± 1 mm

Operating Conditions and Warranty

Parameter	Value
Level T98	≤ 70 °C
Operating temperature	-40 °C to +70 °C*
Maximum system voltage	1500 VDC (IEC)
Maximum series fuse rating	35 A
Bifaciality coefficients	φVoc 98 ± 5%; φIsc 85 ± 5%; φPmax 85 ± 5%
Material and process warranty	12 years
Linear power warranty	30 years
First-year power degradation	1%
Annual linear power degradation	0.35%

Quality and Certification Standards

Category	Standard
Module design and safety	IEC 61215:2021; IEC 61730:2023
Environmental testing	IEC 61701; IEC 62716; IEC 60068; IEC 62804
Fire performance	IEC Class A; UL Type 30
Quality management	ISO 9001:2015
Environmental management	ISO 14001:2015
Occupational health and safety	ISO 45001:2018

Packaging

Item	Configuration
Pallet dimensions	2442 × 1140 × 1251 mm
13 m flatbed truck	36 pcs/pallet; 20 pallets/truck; 720 pcs/truck
17.5 m flatbed truck	36 pcs/pallet; 25 pallets/truck; 900 pcs/truck

Applications

The bifacial dual-glass format is suited to projects that can use rear-side gain from reflected light, including utility-scale ground mounts, commercial and industrial rooftops, distributed generation and solar farms with elevated mounting structures.

• Utility-scale ground-mounted solar farms
• Commercial and industrial rooftop projects
• Distributed generation with bifacial racking
• Projects using high-albedo ground surfaces

OEM & Custom Requirements

We support project supply and private-label requirements around the standard 66QL6-BDX platform. Share the target wattage class, quantity, connector preference and destination port, and we will confirm the available configuration before quotation.

• OEM branding on the frame, label and carton
• Module power class selection from 650 W to 680 W
• Connector type and cable length to project specification
• Pallet and packaging configuration for flatbed or container shipment