Jinko Solar JKM640N-66HL4M-BDV-Z4C3 N-type bifacial solar panel

Jinko N-Type Bifacial 640 W (66HL4M-BDV-Z4C3)

A dual-glass bifacial panel that also harvests the light bouncing off your roof or the ground, so the same square metres earn more. This model: Module Efficiency 23.7%, Maximum Power (Pmax) 640W.

Maximum Power (Pmax): 640W
Module Efficiency: 23.7%

AED 353incl. VAT

In stock

Full Specifications Download datasheet (PDF)

Jinko N-Type Bifacial 640 W (66HL4M-BDV-Z4C3) features

Both faces generate

The clear rear glass collects light bounced up off the roof or ground, output a one-sided panel simply loses.

Glass front and back

Two 2 mm panes in an anodised aluminium frame, certified to 5400 Pa of downward load and 2400 Pa of uplift.

N-type cells

Tunnel-oxide passivated contacts give up less output in the first year and keep working in dull, early-morning light.

Made for hard sites

Tested against salt mist, ammonia and blown sand, with an anti-PID guarantee and an IP68 junction box.

About the Jinko N-Type Bifacial 640 W (66HL4M-BDV-Z4C3)

A full-size dual-glass bifacial module built on N-type cells, made for commercial rooftops, carports and ground-mount plants rather than small domestic arrays. The clear rear pane turns light reflected off the surface below into extra production, so a pale membrane or light gravel pays back on every sunny day. Glass on both faces, an anodised aluminium frame and a sealed junction box keep it working through storms, heavy loads and salt-laden coastal air. This model: Module Efficiency 23.7%, Maximum Power (Pmax) 640W.

Specifications last updated 20 August 2026

Jinko N-Type Bifacial 640 W (66HL4M-BDV-Z4C3) full specifications

Electrical

Maximum Power Voltage - Vmp	41.30 V
Maximum Power Current - Imp	15.50 A
Short-circuit Current - Isc	16.32 A
Open-circuit Voltage - Voc	49.88 V
Module Efficiency STC	23.7 %

Mechanical

Cell Type	N- type Mono-crystalline
Dimensions	2382×1134×30 mm
Weight	32.4 kg
Front Glass	2.0 mm, Anti-reﬂection Coating
Back Glass	2.0 mm, Heat Strengthened Glass
Frame	Anodized Aluminium Alloy
Junction Box	IP68 Rated
Connector Type	JK03M / JK03M2 / Others*
Output Cables	4.0 mm2
Pallet Dimensions	2396×1110×1251mm
Packing Detail	36 pcs/pallets, 72 pcs/stack,
Maximum Power-Pmax	640 W
Maximum Power Current Imp (BNPI)	17.10 A
Temperature Coefficient of Voc	-0.25 %/°C
Temperature Coefficient of Isc	0.045 %/°C
Power Tolerence	0 ~ + 3 %
Temperature Coefficient of Pmax	-0.29 %/°C
Operating Temperature	-40 °C +70 °C
Maximum Series Fuse Rating	35 A
Bifaciality Coefficents	φVoc: 98±5 %, φIsc: 80±5 %, φPmax: 80±5 %
Number of Cells	132 (66×2)

Environmental

Protection Class	Class II
IEC Fire Type	Class C

Certifications

Frequently Asked Questions

The rear face is rated at 80% (plus or minus 5%) of the front's response, and under the standard bifacial test conditions the module reads roughly 10% above its front-only rating. What you actually collect depends on how reflective the surface below is and how high the panel sits above it, so white roof membrane or pale gravel gives the most, dark asphalt the least.

Twelve years on the product itself and thirty years on power output. The linear warranty allows no more than 1% loss in the first year and 0.40% a year after that, which leaves at least 87.4% of the original rating still guaranteed in year 30.

Each module is 2382 x 1134 x 30 mm and weighs 32.4 kg, so it is a two-person lift and the rails need to suit a full-size 132-cell frame. Panels ship 36 to a pallet, 72 to a stack and 720 in a 40-foot high-cube container, which is the figure to use when you plan delivery and crane access.

Jinko N-Type Bifacial 640 W (66HL4M-BDV-Z4C3)