--- title: "Sunlike Solar SKT420M10-108D6 420W Solar Panel - Specs & Review | ComparePV" description: "Sunlike Solar SKT420M10-108D6 420W solar panel. Specs: 21.02% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunlike-solar-skt420m10-108d6" updated: 2026-09-11 --- # Sunlike Solar SKT420M10-108D6 Middle of its segment, modest efficiency 321 panels in the segment N-type 400-450 W ## Identity - **Manufacturer:** Sunlike Solar - **Model:** SKT420M10-108D6 - **Series:** SKT420~455M10-108D6 - **Rated power:** 420 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 400-450 W (321 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 430 W | Weak - bottom 20% | | | Module efficiency | 21.02% | 21.91% | Weak - bottom 13% | 9,696 | | Power density | 210.2 | 218.3 | Weak - bottom 13% | 9,728 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 21.5 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.02% | 21.91% | Weak - bottom 13% | 9,696 | | Power density | 210.2 | 218.3 | Weak - bottom 13% | 9,728 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 51.2 | 51.2 | Typical | 4,567 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.02% module efficiency** - Bottom 13% of the N-type 400-450 W segment, against a median of 21.91%. - **210.2 watts per square metre** - Bottom 13% of the N-type 400-450 W segment, against a median of 218.3. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.02 % - **Voltage at Pmax (Vmp):** 31.77 V - **Current at Pmax (Imp):** 13.22 A - **Open-circuit voltage (Voc):** 38.10 V - **Short-circuit current (Isc):** 13.98 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.5 kg - **Area:** 2.00 m2 - **Power density:** 210.2 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:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9696 of 14005 | | Power density | 9728 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 4567 of 14005 | | Warranty | 21 of 14005 | ## About this series Sunlike Solar SKT420-455M10-108D6 series photovoltaic panels are technologically advanced modules using M10 format cells, which optimize power density while maintaining compact construction dimensions. A key distinguishing feature of this series is the use of **bifacial technology in a double-glass architecture**, which allows for the efficient use of light reflected from the ground and a significant increase in the total energy yield from the installation. Thanks to the integration of **half-cut cells and a multi-busbar system**, the modules exhibit excellent resistance to the hotspot phenomenon and minimize energy losses resulting from internal resistance. This solves the common problem of efficiency drops in partial shading conditions, which is critical for installations on the roofs of residential and commercial buildings. This series is characterized by **outstanding efficiency in low-light conditions**, guaranteeing stable power production even on cloudy days, so characteristic of the Polish climate. The product is intended for investors seeking **maximum resistance to PID degradation and corrosion**, which confirms its suitability in harsh environmental conditions. Unlike competitors' products, this series offers a more favorable temperature coefficient, translating into higher yields during summer heatwaves. This is the optimal choice for modern prosumers who value longevity and the highest fire safety standards. ## Notable figures - Module efficiency of 21.0% is 0.9pp below average for \*\*N-type 400-450W\*\* panels (median: 21.9%) - At 210.2 W/m², this panel generates 8.1 W/m² less per unit area than \*\*N-type 400-450W\*\* median (218.3 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*N-type 400-450W\*\* panels - In the top 69% for efficiency among all N-type panels ## Questions ### What warranty does the Sunlike Solar SKT420~455M10-108D6 series come with? The SKT420~455M10-108D6 series carries a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty. The manufacturer guarantees that after 30 years of operation the module will retain at least 80% of its nominal output power. This is one of the longer warranty periods available on the market, reflecting confidence in N-type cell technology and double-glass construction durability. ### What does bifacial technology mean in the SKT420~455M10-108D6 series, and is the premium worth it? Bifacial modules harvest light from both the front and rear surfaces — light reflected from the roof, ground, or white waterproofing membrane reaches the rear glass and boosts energy production. Under real-world installation conditions the yield gain typically ranges from 5 to 15% compared to a monofacial module of the same nominal power rating. The benefit increases with higher surface albedo and optimized panel tilt angle. ### How do N-type cells in the SKT420~455M10-108D6 series differ from standard PERC cells? N-type cells contain no boron in the silicon structure, making them immune to LID (Light Induced Degradation), which can reduce PERC module output by 1–2% in the first year. N-type also delivers a more favorable temperature coefficient, translating into higher yields during summer heat. The SKT420~455M10-108D6 series combines N-type with half-cut cell technology and a multi-busbar layout, minimizing resistive losses and the risk of hotspots. ### Do the SKT420~455M10-108D6 panels perform well in winter and on overcast days? Yes. N-type cells show higher sensitivity to diffuse irradiance compared to standard PERC cells, which is particularly important in climates with significant cloud cover. The double-glass construction eliminates the rear backsheet, improving heat dissipation in summer and reducing condensation risk in winter. Modules are certified for snow loads up to 5,400 Pa, meeting structural requirements for demanding climate zones. ### Is the SKT420~455M10-108D6 series resistant to corrosion and PID degradation? Yes. The double-glass design eliminates moisture ingress through a polymer backsheet, significantly reducing long-term cell corrosion — critical for coastal locations or high-humidity environments. N-type cell technology is inherently highly resistant to PID (Potential Induced Degradation), so even in high-voltage string configurations the series maintains stable power output throughout its entire service life. ### Are the 455 Wp SKT420~455M10-108D6 panels suitable for a residential pitched-roof installation? Yes, the SKT420~455M10-108D6 series is a solid choice for residential prosumer installations on pitched roofs. The M10 cell format (182 mm) paired with a 108 half-cut cell layout keeps the module footprint compact, simplifying transport and mounting on standard racking systems. Half-cut technology also limits partial-shading losses from chimneys, antennas, and dormers — a common challenge on residential rooftops. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/1-1-skt420-455m10-108d6-fb-bmg-1-6mm-1b32043ba85f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +45 W, hotter, +2.8 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.8 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.7 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, cooler, +2.6 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, lighter, +2.6 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, cooler, +2.6 pp | | [Sunlike Solar SKT425M10-108D6](https://comparepv.com/panel/sunlike-solar-skt425m10-108d6) | 425 W | +0.2 pp | | [Sunlike Solar SKT440M12-96D4](https://comparepv.com/panel/sunlike-solar-skt440m12-96d4) | 440 W | +20 W, cooler, +1.0 pp | | [Sunlike Solar SKT445M10-108D6](https://comparepv.com/panel/sunlike-solar-skt445m10-108d6) | 445 W | +25 W, +1.3 pp | | [Sunlike Solar SKT450M10-108D6](https://comparepv.com/panel/sunlike-solar-skt450m10-108d6) | 450 W | +30 W, +1.5 pp | | [Sunlike Solar SKT455M10-108D6](https://comparepv.com/panel/sunlike-solar-skt455m10-108d6) | 455 W | +35 W, +1.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +4.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, cooler, +3.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, cooler, +3.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, cooler, +3.5 pp | --- Source: https://comparepv.com/panel/sunlike-solar-skt420m10-108d6 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.