Longi Hi-MO X10 LR8-66HVD 660W Solar Panel

Short Description:

Industry-Leading Efficiency: Max module efficiency of 24.80%, delivering higher power output per square meter.
Superior Power Degradation: Only 1% first-year degradation and 0.35% annual degradation from year 2 to 30.
Better Temperature Coefficient: -0.26%/℃ Pmax, ensuring higher power generation in high-temperature environments.
Bifacial Dual-Glass Design: Up to 75±5% bifaciality, capturing rear-side irradiation to significantly reduce LCOE.
Enhanced Mechanical Load: Certified to withstand 5400 Pa front and 2400 Pa rear static loads, plus 25mm hailstone impact at 23m/s.
IP68 Junction Box: Three diodes for superior protection and reliability.

Item	Specification
Brand / Series	LONGi / Hi-MO X10 Scientist
Model	LR8-66HVD
Power Range	640W – 670W
Cell Orientation	132 (6×22)
Module Dimensions	2382 × 1134 × 30 mm
Weight	32.5 kg
Glass	Dual glass, 2.0+2.0 mm semi-tempered glass
Frame	Anodized aluminium alloy frame
Junction Box	IP68, three diodes
Output Cable	4mm², +400/-200mm/+1400mm
Maximum System Voltage	DC1500V (IEC)
Maximum Series Fuse Rating	35A
Operating Temperature	-40℃ ~ +85℃
Nominal Operating Cell Temperature (NOCT)	45±2℃
Power Output Tolerance	0~3%
Protection Class	Class II
Fire Rating	IEC Class C
Bifaciality	φPmax: 75±5%
Max Mechanical Load	Front 5400Pa / Rear 2400Pa
Hailstone Test	25mm hailstone at the speed of 23m/s
Temperature Coefficient (Isc)	+0.050%/℃
Temperature Coefficient (Voc)	-0.200%/℃
Temperature Coefficient (Pmax)	-0.260%/℃
Packaging	36pcs per pallet / 144pcs per 20′GP / 720pcs per 40′HC

Electrical Characteristics (STC: Irradiance 1000W/m², Cell Temperature 25°C, AM1.5)

Module Type	Max Power (Pmax/W)	Open Circuit Voltage (Voc/V)	Short Circuit Current (Isc/A)	Voltage at Maximum Power (Vmp/V)	Current at Maximum Power (Imp/A)	Module Efficiency (%)
LR8-66HVD-640M	640	49.52	16.38	40.78	15.69	23.69
LR8-66HVD-670M	670	50.12	16.86	41.38	16.19	24.80

Electrical Characteristics with Different Rear Side Power Gain

Pmax/W	Voc/V	Isc/A	Vmp/V	Imp/A	Pmax Gain
645	49.62	16.46	40.88	15.78	0%
808	49.72	20.58	40.98	19.73	25%

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Product Detail

Product Tags

Introducing the LONGi Hi-MO X10 Scientist LR8-66HVD, an ultra-high efficiency N-type bifacial dual-glass solar module delivering 640W to 670W of power. It boasts an industry-leading maximum module efficiency of 24.80% and an outstanding degradation profile (1% first year, ≤0.35% annual thereafter). With a superior temperature coefficient (-0.26%/℃) and bifaciality of up to 75±5%, it maximizes energy yield even in high-temperature and low-light conditions. Built with a robust dual-glass structure, anodized aluminum frame, and IP68 junction box, this 132-cell (6×22) module is certified for extreme mechanical loads (5400 Pa front / 2400 Pa rear) and backed by a 30-year linear power warranty, making it the ultimate choice for commercial and utility-scale solar projects.