--- title: "Luxen Solar Energy LNEK-620ND 620W Solar Panel - Specs & Review | ComparePV" description: "Luxen Solar Energy LNEK-620ND 620W solar panel. Specs: 21.91% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/luxen-solar-energy-lnek-620nd" updated: 2026-09-11 --- # Luxen Solar Energy LNEK-620ND Middle of its segment, needs the roof space 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Luxen Solar Energy - **Model:** LNEK-620ND - **Series:** LUXPOWER SERIES N6 - **Rated power:** 620 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 620 W | 625 W | Typical | | | Module efficiency | 21.91% | 22.77% | Weak - bottom 4% | 6,770 | | Power density | 219.1 | 227.7 | Weak - bottom 4% | 6,743 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 11% | 6,093 | | Weight (kg) | 35.0 kg | 32.5 kg | Weak - bottom 8% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.91% | 22.77% | Weak - bottom 4% | 6,770 | | Power density | 219.1 | 227.7 | Weak - bottom 4% | 6,743 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 11% | 6,093 | | Weight per kWp | 56.5 | 52.7 | Weak - bottom 8% | 10,653 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **219.1 watts per square metre** - Bottom 4% of the N-type 600-650 W segment, against a median of 227.7. Ranked 6,743rd in the whole database. - **21.91% module efficiency** - Bottom 4% of the N-type 600-650 W segment, against a median of 22.77%. Ranked 6,770th in the whole database. - **56.5 kg per kWp** - Bottom 8% of the N-type 600-650 W segment, against a median of 52.7. Ranked 10,653rd in the whole database. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 620 W - **Efficiency:** 21.91 % - **Voltage at Pmax (Vmp):** 36.21 V - **Current at Pmax (Imp):** 17.12 A - **Open-circuit voltage (Voc):** 43.75 V - **Short-circuit current (Isc):** 18.16 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2172 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 35.0 kg - **Area:** 2.83 m2 - **Power density:** 219.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 542 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6770 of 14005 | | Power density | 6743 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 10653 of 14005 | | Warranty | 21 of 14005 | ## Pros - **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. ## Cons - **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. ## About this series 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. ## Notable figures - At 21.9% efficiency, this panel is 0.9pp below the \*\*N-type 600-650W\*\* median of 22.8% - At 219.1 W/m², this panel generates 8.6 W/m² less per unit area than \*\*N-type 600-650W\*\* median (227.7 W/m²) - 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 - #6770 for efficiency, #6093 for temperature performance out of 14005 panels ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/620-640W_ND_35mm_G12_2172_1303mm_LNVB-a434de75759e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +3.3 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +50 W, lighter, +2.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +50 W, lighter, +2.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +2.9 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +50 W, cooler, +2.9 pp | | [Luxen Solar Energy LNEK-625ND](https://comparepv.com/panel/luxen-solar-energy-lnek-625nd) | 625 W | Very close match | | [Luxen Solar Energy LNEK-630ND](https://comparepv.com/panel/luxen-solar-energy-lnek-630nd) | 630 W | +10 W, +0.4 pp | | [Luxen Solar Energy LNEK-635ND](https://comparepv.com/panel/luxen-solar-energy-lnek-635nd) | 635 W | +15 W, +0.5 pp | | [Luxen Solar Energy LNEK-640N](https://comparepv.com/panel/luxen-solar-energy-lnek-640n) | 640 W | +20 W, lighter, +0.7 pp | | [Gamko New Energy GKA210N120](https://comparepv.com/panel/gamko-new-energy-gka210n120) | 680 W | +60 W, lighter, +2.1 pp | | [Gamko New Energy GKA210N120-675](https://comparepv.com/panel/gamko-new-energy-gka210n120-675) | 675 W | +55 W, lighter, +1.9 pp | | [Q-SUN Solar QN-670HJT-01](https://comparepv.com/panel/q-sun-solar-qn-670hjt-01) | 670 W | +50 W, cooler, +1.8 pp | | [Gamko New Energy GKA210N120-670](https://comparepv.com/panel/gamko-new-energy-gka210n120-670) | 670 W | +50 W, lighter, +1.8 pp | | [Q-SUN Solar QN-665HJT-01](https://comparepv.com/panel/q-sun-solar-qn-665hjt-01) | 665 W | +45 W, cooler, +1.6 pp | | [Gamko New Energy GKA210N120-665](https://comparepv.com/panel/gamko-new-energy-gka210n120-665) | 665 W | +45 W, lighter, +1.6 pp | --- Source: https://comparepv.com/panel/luxen-solar-energy-lnek-620nd Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.