66QL6-BDV Series

Product Overview

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

The module is supplied in five power classes from 650 W to 670 W, with a 1500 VDC maximum system voltage, IP68 junction box and Class II safety rating. Connector type, cable length and packaging can be confirmed against each project requirement.

Key Features

• N-type TOPCon cell platform with 264 cells (66 × 4)
• Bifacial dual-glass construction with 85 ± 5% bifaciality
• Up to 24.80% module efficiency across the 650–670 W range
• Low Pmax temperature coefficient of -0.26%/°C
• IP68 junction box, Class II safety and Class C IEC fire rating
• 1500 VDC maximum system voltage and 35 A maximum series fuse
• 12-year product warranty and 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
Maximum power – Pmax (Wp)	650	655	660	665	670
Optimum operating voltage – Vmp (V)	42.57	42.70	42.83	42.96	43.09
Optimum operating current – Imp (A)	15.27	15.34	15.41	15.48	15.55
Open-circuit voltage – Voc (V)	50.26	50.44	50.62	50.80	50.98
Short-circuit current – Isc (A)	15.98	16.04	16.10	16.16	16.22
Module efficiency (%)	24.06	24.25	24.43	24.62	24.80
Bifaciality	85 ± 5%
Power output tolerance	0 ~ +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
Maximum power – Pmax (W)	724	729	735	741	746
Optimum operating voltage – Vmp (V)	42.52	42.69	42.86	43.03	43.20
Optimum operating current – Imp (A)	17.04	17.10	17.17	17.23	17.30
Open-circuit voltage – Voc (V)	50.38	50.56	50.74	50.92	51.10
Short-circuit current – Isc (A)	17.80	17.87	17.94	18.00	18.07

Mechanical & Structural Parameters

Cell type	N-type monocrystalline
Cell configuration	264 cells (66 × 4)
Module dimensions	2382 × 1134 × 30 mm
Weight	32.5 kg
Front glass	2.0 mm high-transmission coated glass
Back glass	2.0 mm semi-tempered glass
Frame	Anodized aluminium alloy
Junction box	IP68
Safety class	Class II
IEC fire class	Class C
Connector type	JK03M / JK03M2 / other; MC4-EVO2 available on request
Output cable	4.0 mm²; (+) 600 mm, (-) 400 mm; customizable

Operating Conditions

Maximum system voltage	1500 VDC (IEC)
Maximum series fuse rating	35 A
Operating temperature – T98	≤ 70 °C
Bifaciality coefficients	φVoc 98 ± 5%; φIsc 85 ± 5%; φPmax 85 ± 5%
Product warranty	12 years
Linear power warranty	30 years
Power degradation	1% in the first year; 0.35% per year thereafter

Packaging

Pallet dimensions	2396 × 1110 × 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-BDV 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 670 W
• Connector type and cable length to project specification
• Pallet and packaging configuration for flatbed or container shipment