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Luxen Solar Energy Brand review

LNEK-640ND

640 Wp N-type Bifacial 2500%
ComparePV verdict

Middle of its segment, weak in heat

Rank 1,900 of 14,005
Compare panels Datasheet PDF
Power (Wp)
640
Strong · top 11%
Efficiency (%)
22.61
Typical · median 22.77%
Density (Wp/m²)
226.1
Typical · median 227.7
Temp (%/°C)
-0.300
Weak · bottom 11%
Weight (kg)
35.0
Weak · 2.5 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The LUXPOWER N6 series from Luxen Solar Energy consists of monocrystalline modules engineered to maximize energy yield on limited roof or ground area. At the core of the design is N-Type TOPCon technology, which compared to conventional PERC cells delivers higher conversion efficiency, better high-temperature performance, and significantly lower degradation over the panel's lifetime. The module features half-cut cells arranged in a 120-cell layout, reducing resistive losses, lowering hotspot risk, and improving resistance to microcracks and partial shading. The use of the large-format G12/210mm wafer enables high per-unit power output while keeping panel dimensions manageable, translating into fewer panels needed and reduced BoS installation costs. The N6 series suits both residential and commercial installations where power density and predictable long-term performance matter most. The manufacturer backs the series with a low degradation rate and an extended warranty up to 20 years, making it a solid choice for investors seeking stable returns and a lower LCOE.

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.61% 22.77% Typical 3,643
Power density 226.1 227.7 Typical 3,681
Temperature coefficient -0.300 -0.290 Weak · bottom 11% 6,093
Weight per kWp 54.7 52.7 Weak · bottom 25% 9,078
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Hot climates and weight-limited structures.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 11% of the N-type 600-650 W segment, against a median of -0.290.

54.7 kg per kWp

Bottom 25% of the N-type 600-650 W segment, against a median of 52.7.

What owners get
N-type TOPCon with half-cut layout

The 120 half-cut cell N-Type TOPCon layout reduces LID/LeTID degradation and resistive losses, improving high-temperature behavior compared to conventional PERC cells. This design also lowers hotspot risk and increases resistance to microcracks and partial shading.

Bifacial double-glass construction

The dual-glass bifacial design enables additional rear-side energy yield (typically several to low-double-digit percent depending on ground albedo) and improves mechanical and corrosion resistance versus backsheet-based modules.

30-year linear power warranty

The manufacturer offers a 30-year linear power warranty alongside a 15-20 year product warranty, in line with premium-segment expectations and supporting lower LCOE through a longer predictable operating period.

Tier-1 BNEF status since 2022

Luxen Solar Energy, operating since 2005, achieved BloombergNEF Tier-1 classification in 2022, confirming bankability and easing financing for commercial projects built on this series.

Large-format G12/210mm for high power density

Power up to 685Wp with a 120-cell G12/210mm layout puts the N6 series on par with or ahead of Loom Solar SHARK 685 (685W/22%) and EGing PV AURORA Pro (685W/22.05%), with efficiency up to 22.61% - translating into fewer panels needed and lower BoS costs.

Trade-offs
Efficiency trails segment leader

Peak efficiency of 22.61% is clearly below the AIKO Comet 3N72 module (25.2%) built on ABC technology - a gap of over 2.5 pp means lower power density on space-constrained roofs compared to top-tier market alternatives.

Product warranty floor at 15 years

The 15-20 year product warranty range means that, depending on the chosen variant, buyers may receive only 15 years of product protection, shorter than the 25-year standard offered by some tier-1 competitors - worth confirming for the specific model before purchase.

Notes from the database
  • Efficiency of 22.6% matches the N-type 600-650W median
  • Power density of 226.1 W/m² matches the N-type 600-650W median
  • Temperature coefficient of -0.30%/°C matches the N-type 600-650W median
  • At 35.0 kg (2.5 kg above N-type 600-650W median of 32.5 kg), requires checking roof load capacity
  • In the top 26% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 640 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.61 % Typical Segment median 22.77%
Vmpp · Impp 37.12 V · 17.24 A Operating point at max power
Voc · Isc 44.57 V · 18.32 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2172×1303×35 mm · 2.83 m² of roof
Weight 35.0 kg Weak Weak · 2.5 kg above median
Cells 120 · N-type Monocrystalline
Bifaciality 2500 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 11% of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 559 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Luxen Solar Energy in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 640 Wp appear here. The rest cover the whole series.

Linear Performance Warranty Linear Performance Warranty Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.300 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Luxen Solar Energy LNEK-640ND 640 W 22.61% -0.300 35.0 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.6 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +40 W, lighter, +2.6 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +2.4 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.4 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +2.2 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Cooler, lighter, +2.2 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.2 pp
LNEK-620ND 620 W 21.91% -0.300 35.0 kg -20 W, -0.7 pp
LNEK-625ND 625 W 22.08% -0.300 35.0 kg -15 W, -0.5 pp
LNEK-630ND 630 W 22.26% -0.300 35.0 kg -10 W, -0.3 pp
LNEK-635ND 635 W 22.44% -0.300 35.0 kg Very close match
GKA210N120 680 W 24.03% -0.340 28.0 kg Hotter, lighter, +1.4 pp
GKA210N120-675 675 W 23.85% -0.340 28.0 kg Hotter, lighter, +1.2 pp
QN-670HJT-01 670 W 23.70% -0.240 35.5 kg +30 W, cooler, +1.1 pp
GKA210N120-670 670 W 23.67% -0.340 28.0 kg Hotter, lighter, +1.1 pp
QN-665HJT-01 665 W 23.50% -0.240 35.5 kg +25 W, cooler, +0.9 pp

Found 497 panels of the same or similar size to this one, within ±10 mm. See them here Found 502 panels of the same or similar size to this one, within ±25 mm. See them here Found 502 panels of the same or similar size to this one, within ±50 mm. See them here Found 506 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does N-Type TOPCon technology in LUXPOWER N6 panels differ from classic PERC panels?
The N-Type TOPCon cells used in the N6 series deliver higher energy conversion efficiency than traditional PERC cells and perform better at high temperatures, resulting in higher output during hot summer months. Another benefit is a lower degradation rate over time, meaning the panel retains higher rated power for longer and produces more energy over a 25-30 year lifespan.
Are LUXPOWER N6 panels bifacial, and is it worth installing them as a ground-mount system?
Yes, the N6 series uses bifacial construction, meaning it also generates power from reflected light hitting the rear side of the module. This makes it a strong choice for ground-mount installations and light-colored, reflective roof surfaces, where the additional rear-side yield can boost total energy production by several percent compared to monofacial modules.
What is the maximum power output of the LUXPOWER N6 panel, and how many modules are needed for a 10 kW system?
LUXPOWER N6 panels reach a maximum power output of up to 685 Wp. Thanks to this high unit power, roughly 15 modules are enough for a 10 kW system, reducing the mounting area required and lowering the cost of racking and cabling compared to lower-power panels.
What warranty comes with LUXPOWER N6 panels, and what does it cover?
Manufacturer Luxen Solar Energy provides a 20-year product warranty covering material and workmanship defects, plus a 30-year power performance warranty guaranteeing that the module retains a high percentage of its rated output throughout its service life. This is among the longer warranty terms currently available on the solar panel market.
Do the half-cut cells in LUXPOWER N6 panels reduce the risk of failure under partial shading?
Yes, the N6 series uses half-cut cells arranged in a 120-cell layout, which reduces resistive losses and lowers the risk of hotspots forming under partial shading, such as from a chimney or antenna. This design also improves resistance to microcracks, resulting in greater durability and more stable performance under challenging operating conditions.
Are LUXPOWER N6 panels suitable for commercial installations, or only residential ones?
The N6 series is versatile and works well in both residential and commercial installations. The large G12/210mm cell format delivers high power density on limited surface area, which is especially valuable in commercial projects where maximizing energy production on available roof or ground space matters, while also cutting module count and BoS installation costs.
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