--- title: "SunKean SKT420M10-108D4 420W Solar Panel - Specs & Review | ComparePV" description: "SunKean SKT420M10-108D4 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunkean-skt420m10-108d4" updated: 2026-09-11 --- # SunKean SKT420M10-108D4 Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** SunKean - **Model:** SKT420M10-108D4 - **Series:** SKT415~435M10-108D4 - **Rated power:** 420 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 435 W | Weak - bottom 16% | | | Module efficiency | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.4 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 | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.7 | 51.4 | Typical | 10,113 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.50% module efficiency** - Bottom 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 31.52 V - **Current at Pmax (Imp):** 13.33 A - **Open-circuit voltage (Voc):** 38.11 V - **Short-circuit current (Isc):** 14.07 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:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.4 kg - **Area:** 1.95 m2 - **Power density:** 215.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 10113 of 14005 | | Warranty | 21 of 14005 | ## About this series The SunKean SKT415~435M10-108D4 series are modules based on the **TOPCon** technology, designed for high energy production even under less-than-ideal conditions. The use of a **double-glass** structure increases resistance to environmental factors, stabilizes performance over the long term, and makes it easier to select panels for installations where durability is key. Furthermore, these are **bifacial** modules, meaning they can also utilize reflected light from the ground - allowing you to generate more energy from the same surface, especially on light roofs, membranes, and ground-mounted installations. In practice, this series solves common problems for investors: limited space, reduced energy production in hot weather, and the risk of faster module degradation. Thanks to the **half-cut** design and the **16BB** multi-busbar structure, the panel better handles micro-shading and internal losses, resulting in more stable string performance. This makes it a good choice for homes, businesses, and PV farms where predictable energy yields and long-term durability are important. ## Notable figures - At 21.5% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - 215.1 W/m² power density is 5.1 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - requires larger installation area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - Weight of 23.4 kg is 1.4 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - Ranked #7958 out of 14005 panels for efficiency in the database ## Questions ### What warranty comes with the SunKean SKT415~435M10-108D4 solar panels? SunKean provides a 15-year product warranty and a 30-year linear power output warranty. Over those 30 years, the module must maintain energy production within the degradation curve specified by the manufacturer. This is one of the longer warranty standards available for premium-class PV modules and is a meaningful factor when calculating the total cost of ownership over the system's lifetime. ### What does bifacial mean for the SunKean SKT435M10-108D4, and how much extra energy can it produce? Bifacial means the module generates power from both sides. The front captures direct solar irradiance while the rear collects light reflected from the roof surface or ground (albedo effect). The actual energy gain depends on surface reflectivity and mounting height, but on white membranes or ground-mount systems it can add several to over ten percent compared to a conventional monofacial module at the same rated 435 Wp. ### Why choose TOPCon over PERC technology in the SunKean SKT415~435M10-108D4 series? TOPCon (Tunnel Oxide Passivated Contact) achieves higher cell efficiency than legacy PERC by reducing recombination losses through superior surface passivation. This translates into higher power output from the same footprint, a lower temperature coefficient meaning less power loss on hot days, and slower long-term degradation. The SKT415~435M10-108D4 series reaches its peak output of 435 Wp specifically because of this cell technology. ### How do half-cut cells and 16 busbars (16BB) affect the performance of a SunKean SKT435M10-108D4 system? Half-cut cells split each cell in two, reducing internal resistance and heat dissipation, and limiting the impact of partial shading on the rest of the string. The 16BB design provides more current pathways, further lowering resistive losses. The practical result is more stable string output under partial shading conditions caused by chimneys, antennas, or neighboring structures, improving overall MPPT efficiency. ### Are the double glass SunKean SKT415~435M10-108D4 panels heavier, and does the roof structure need reinforcement? Yes, dual-glass construction is heavier than standard backsheet modules, so the mounting structure — whether roof-based or ground-mount — must be engineered to accommodate the additional weight. In return, you gain significantly higher mechanical strength, moisture resistance, and protection against PID (Potential Induced Degradation), extending the module's service life. These advantages are especially valuable in commercial rooftop and utility-scale installations. ### Is the SunKean SKT415~435M10-108D4 series suitable for utility-scale PV farms? Yes, this series is well suited for ground-mount and utility-scale solar farms. The bifacial design captures reflected ground irradiance, which improves energy yield without increasing land use. The reinforced double glass construction withstands demanding field conditions including moisture, wind loads, and thermal cycling. The 415–435 Wp power range allows efficient string design and reduces the total module count needed to reach target farm capacity. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/2-2-182mm-16BB-108cells-415-435W-Double-Glass-Bifacial-TOPC-1770bdaffe30.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, lighter, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, cooler, +2.1 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, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, cooler, +2.1 pp | | [SunKean SKT345M10](https://comparepv.com/panel/sunkean-skt345m10) | 345 W | -75 W, -3.8 pp, -5 yr warranty | | [SunKean SKT350M10](https://comparepv.com/panel/sunkean-skt350m10) | 350 W | -70 W, -3.6 pp, -5 yr warranty | | [SunKean SKT355M10](https://comparepv.com/panel/sunkean-skt355m10) | 355 W | -65 W, -3.3 pp, -5 yr warranty | | [SunKean SKT360M10](https://comparepv.com/panel/sunkean-skt360m10) | 360 W | -60 W, -3.1 pp, -5 yr warranty | | [SunKean SKT365M10](https://comparepv.com/panel/sunkean-skt365m10) | 365 W | -55 W, -2.8 pp, -5 yr warranty | | [SunKean SKT385M10](https://comparepv.com/panel/sunkean-skt385m10) | 385 W | -35 W, hotter, -1.7 pp | | [SunKean SKT390M10](https://comparepv.com/panel/sunkean-skt390m10) | 390 W | -30 W, hotter, -1.5 pp | | [SunKean SKT395M10](https://comparepv.com/panel/sunkean-skt395m10) | 395 W | -25 W, hotter, -1.3 pp | | [SunKean SKT400M10](https://comparepv.com/panel/sunkean-skt400m10) | 400 W | -20 W, hotter, -1.0 pp | | [SunKean SKT405M10](https://comparepv.com/panel/sunkean-skt405m10) | 405 W | -15 W, hotter, -0.7 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | --- Source: https://comparepv.com/panel/sunkean-skt420m10-108d4 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.