NUUKO 635W-655W N-Type TOPCon Bifacial Double-Glass Solar Module

High Efficiency: Up to 23.1% module efficiency

Bifacial Design: Dual-sided power generation for higher yield

Durable Build: Double-glass structure with corrosion-resistant frame

Low-Light Performance: Reliable output under weak or diffused light

Long-Term Reliability: 12-year product warranty & 30-year linear power warranty

Brand:
NUUKO
Item NO.:
NKM635-655N-120BDG12

Product Advantages

Core Advantage

High Conversion Efficiency

Advanced TOPCon bifacial cells deliver superior energy yield Maximizing power output under diverse operating conditions

High Energy Capture Capability

Stable energy generation in low-irradiance and diffuse light conditions Ensures consistent daily energy harvest across all weather

Superior Durability

Double-glass structure with enhanced mechanical strength and sealing integrity Designed for long-term operation in harsh environments

Advanced Degradation Control

Minimized power loss through Anti-PID and Anti-LID technologies Ensures stable long-term performance and sustained energy yield

Universal Application Scenarios

Optimized module design ensures broad application adaptability Suitable for residential, commercial, and utility-scale PV systems

Product Specifications

Mechanical Specifications
Electrical Specifications
Maximum Ratings
Temperature Characteristics

Cell Type	N Type Mono-crystalline
Cell Arrangement	120 (6*20)
Weight	35KG
Module Dimensions	2172130333mm
Cable Length	4.0mm², ±300mm or Customized length
Front Glass	2.0mm, Anti-Reflection Coating
Back Glass	2.0mm, Heat Strengthened Glass
No.of Bypass Diodes	3/6
Packing Configuration	33pcs/pallet, 594pcs/40HQ
Frame	Anodized Aluminium Alloy
Junction Box	IP68

Module Type	NKM635N-120BDG12		NKM640N-120BDG12		NKM645N-120BDG12		NKM650N-120BDG12		NKM655N-120BDG12
Testing Condition	STC	NMOT	STC	NMOT	STC	NMOT	STC	NMOT	STC	NMOT
Rated output (Pmp/Wp)	635	480	640	484	645	488	650	492	655	495
Maximum Power Voltage	37.42	35.26	37.60	35.44	37.78	35.62	37.96	35.80	38.14	35.98
Maximum Power Current	16.97	13.61	17.02	13.65	17.07	13.69	17.12	13.73	17.17	13.77
Open Circuit Voltage	43.54	41.56	43.72	41.74	43.90	41.92	44.08	42.10	44.26	42.28
Short Circuit Current	18.08	14.43	18.11	14.46	18.14	14.49	18.17	14.52	18.20	14.55
Module efficiency(%)	22.4%		22.6%		22.8%		23.0%		23.1%
Power Tolerance (W)	0~+5		0~+5		0~+5		0~+5		0~+5

STC: Irradiance 1000W/m2, Cell Temperature 25°C, Air Mass AM1.5 NMOT: Irradiance at 800W/m2, Ambient Temperatue 20°C, Air Mass AM1.5, Wind Speed 1m/s

Electrical Characteristics with Different Rearside Power Gain (Reference to 640 W Front)

Pmax/W	672	704	736	768	800
Vmpp/V	37.60	37.60	37.60	37.60	37.60
Impp/A	17.87	18.72	19.57	20.42	21.28
Voc/V	43.72	43.72	43.72	43.72	43.72
Isc/A	19.02	19.92	20.83	21.73	22.64
Pmax gain	5%	10%	15%	20%	25%

Maximum System Voltage	1000V/1500V DC（IEC）
Operating Temperature	-40°C ~ +85°C
Maximun Series Fuse	30A
Static Loading	Snow Loading: 5400Pa/ Wind Loading: 2400Pa
Protection Class	II
Fire Type	Class C (IEC)
Bifacial	80±5%

NMOT Temperature	45℃±2℃
Temprature Coefficient (Pmax)	-0.29%/℃
Temprature Coefficient (Voc)	-0.25%/℃
Temprature Coefficient (Isc)	0.045%/℃

Product Certification

NUUKO's products undergo strict quality inspections and comply with international standards. Certified by TÜV, DEKRA, UL, CE, IEC, CB, and IECEE, they also hold multiple patents and software copyrights.

Application Scenarios

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