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Sunlike Solar Brand review

SKT420M10-108D6

420 Wp N-type Bifacial 2000%
ComparePV verdict

Middle of its segment, modest efficiency

Rank 10,518 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 20%
Efficiency (%)
21.02
Weak · bottom 13%
Density (Wp/m²)
210.2
Weak · bottom 13%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
21.5
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

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.

Ranking

321 panels in the segment N-type 400-450 W
Metric This panel Median Position in segment Overall 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
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Not ideal for

Tight roof space and roofs where every square metre has to count.

Watch-outs
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.

Notes from the database
  • 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

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.02 % Weak Segment median 21.91%
Vmpp · Impp 31.77 V · 13.22 A Operating point at max power
Voc · Isc 38.10 V · 13.98 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1762×1134×30 mm · 2.00 m² of roof
Weight 21.5 kg Typical Typical · median 22.0 kg
Cells 108 · N-type Monocrystalline
Bifaciality 2000 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°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 367 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Sunlike Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 420 Wp appear here. The rest cover the whole series.

Sunket N Type Linear Warranty Sunket N Type Linear 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
-0.290 %/°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
Sunlike Solar SKT420M10-108D6 420 W 21.02% -0.290 21.5 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, hotter, +2.8 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, cooler, +2.8 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.7 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.6 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, lighter, +2.6 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.6 pp
SKT425M10-108D6 425 W 21.27% -0.290 21.5 kg +0.2 pp
SKT440M12-96D4 440 W 22.02% -0.260 21.5 kg +20 W, cooler, +1.0 pp
SKT445M10-108D6 445 W 22.30% -0.290 21.5 kg +25 W, +1.3 pp
SKT450M10-108D6 450 W 22.50% -0.290 21.5 kg +30 W, +1.5 pp
SKT455M10-108D6 455 W 22.80% -0.290 21.5 kg +35 W, +1.8 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +4.0 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, cooler, +3.8 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.7 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, cooler, +3.5 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, cooler, +3.5 pp

Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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