--- title: "SunLink SL5N108-420W 420W Solar Panel - Specs & Review | ComparePV" description: "SunLink SL5N108-420W 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunlink-sl5n108-420w" updated: 2026-09-11 --- # SunLink SL5N108-420W Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** SunLink - **Model:** SL5N108-420W - **Series:** SL5N108 (420–435 W) - **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 | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 22.0 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 | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 52.4 | 51.4 | Typical | 5,859 | | 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 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):** 31.84 V - **Current at Pmax (Imp):** 13.19 A - **Open-circuit voltage (Voc):** 38.04 V - **Short-circuit current (Isc):** 14.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 44 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:** 22.0 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 | 6093 of 14005 | | Weight | 5859 of 14005 | | Warranty | 21 of 14005 | ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/SL5N108-Topcon-Bifacial-Silver-e4f3ba005b37.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 | | [SunLink SL5M108-400](https://comparepv.com/panel/sunlink-sl5m108-400) | 400 W | Hotter, -1.0 pp, -5 yr warranty | | [SunLink SL5M108-405](https://comparepv.com/panel/sunlink-sl5m108-405) | 405 W | Hotter, -0.8 pp, -5 yr warranty | | [SunLink SL5M108-410](https://comparepv.com/panel/sunlink-sl5m108-410) | 410 W | Hotter, -0.5 pp, -5 yr warranty | | [SunLink SL5M108-415](https://comparepv.com/panel/sunlink-sl5m108-415) | 415 W | Hotter | | [SunLink SL5N108-425W](https://comparepv.com/panel/sunlink-sl5n108-425w) | 425 W | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, cooler, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/sunlink-sl5n108-420w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.