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SunLink SL5N108-420W
SunLink Brand review

SL5N108-420W

420 Wp TOPCon Bifacial
ComparePV verdict

Middle of its segment, modest efficiency

Rank 10,221 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 16%
Efficiency (%)
21.50
Weak · bottom 17%
Density (Wp/m²)
215.1
Weak · bottom 19%
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
22.0
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The SunLink SL5N108 series (420-435 W) are modules designed to maximize energy yield from a limited roof area, even under less-than-ideal conditions. The use of N-type cells in TOPCon technology ensures stable performance over time and higher resistance to typical performance degradation factors in long-term operation. The half-cut design helps minimize losses in partially shaded conditions, while the multi-busbar architecture supports reliable connections and reduces the risk of microcracks.

In practice, this means fewer surprises in energy production and a more cost-effective installation - particularly in single-family homes, on roofs with chimneys, skylights, or dormers. Bifacial versions can also utilize reflected light from the ground, which will be appreciated by investors installing modules on the ground, on bright roofs, or on elevated structures. For installers, robust resistance to weather conditions and easy integration with existing equipment through standard connectors will also be important.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall 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 -0.300 -0.290 Typical 6,093
Weight per kWp 52.4 51.4 Typical 5,859
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
Best for

Residential and shaded-installations.

Not ideal for

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

Watch-outs
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.

Notes from the database
  • Efficiency of 21.5% matches the TOPCon 400-450W median
  • Power density of 215.1 W/m² is 5.1 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
  • Temperature coefficient of -0.30%/°C matches the TOPCon 400-450W median
  • #7958 for efficiency, #6093 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Weak Segment median 22.00%
Vmpp · Impp 31.84 V · 13.19 A Operating point at max power
Voc · Isc 38.04 V · 14.00 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 22.0 kg Typical Typical · median 22.0 kg
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 44 °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

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
-

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
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
SunLink SL5N108-420W 420 W 21.50% -0.300 22.0 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, lighter, +2.3 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, cooler, +2.3 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.1 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, lighter, +2.1 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.1 pp
SL5M108-400 400 W 20.50% -0.350 21.5 kg Hotter, -1.0 pp, -5 yr warranty
SL5M108-405 405 W 20.70% -0.350 21.5 kg Hotter, -0.8 pp, -5 yr warranty
SL5M108-410 410 W 21.00% -0.350 21.5 kg Hotter, -0.5 pp, -5 yr warranty
SL5M108-415 415 W 21.30% -0.310 21.5 kg Hotter
SL5N108-425W 425 W 21.80% -0.300 22.0 kg +0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +3.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, cooler, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, cooler, +3.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, cooler, +3.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the SunLink SL5N108 series come with?
The SunLink SL5N108 series carries a 15-year product warranty covering defects in materials and workmanship, along with a 30-year linear power output warranty. The extended power guarantee is directly linked to the N-type TOPCon cell technology — N-type cells degrade more slowly than conventional PERC, allowing the manufacturer to back a longer performance commitment over the module's operational lifetime.
Are SunLink SL5N108 panels a good choice for a roof with chimneys, dormers, or partial shading?
Yes, the SL5N108 series is specifically designed for challenging roof layouts. The half-cut cell design splits each cell in two, so shading on one portion of the module does not halt output from the other half. The multi-busbar architecture further reduces resistive losses and the risk of microcracks, delivering more stable energy production even when part of the roof is periodically shaded by a chimney or skylight.
How does TOPCon technology in the SunLink SL5N108 compare to standard PERC panels?
TOPCon (Tunnel Oxide Passivated Contact) uses N-type silicon rather than P-type as in PERC. This translates to higher cell efficiency, significantly lower light-induced degradation (LID), and better resistance to potential-induced degradation (PID). Over the 30-year power warranty period, SL5N108 modules should retain more of their rated output than comparable PERC panels, improving the overall LCOE of the installation.
Do bifacial SunLink SL5N108 panels make sense when installed on a pitched roof?
The bifacial gain is most pronounced where the rear side of the module can capture reflected light — ground mounts, white roofing membranes, or elevated racking systems. On a typical dark-colored pitched roof, rear-side contribution will be minimal. That said, bifacial SL5N108 variants carry no additional maintenance burden and preserve flexibility if the installation is later reconfigured to a ground or carport setup where bifacial performance would be realized.
What is the peak wattage of the SunLink SL5N108, and how many panels are needed for a 10 kWp system?
The SL5N108 series peaks at 435 Wp per module. A 10 kWp residential system would therefore require approximately 23–24 panels at the 435 W variant. The relatively high per-module power output means more capacity fits within a limited roof area — an important advantage for single-family homes where usable roof space is constrained by chimneys, skylights, or architectural features.
Is SunLink a reliable manufacturer — is the SL5N108 series a safe purchase?
SunLink does not currently appear in Bloomberg NEF Tier 1 module manufacturer rankings, which is worth considering for project financing purposes. However, the SL5N108 series offers competitive warranty terms (15+30 years) and modern TOPCon cell technology. Before purchasing, verify that your local distributor provides in-country warranty support — for modules from non-Tier 1 manufacturers, robust local after-sales service is especially important for long-term peace of mind.
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