--- title: "Solar N Plus SP-N16/108HG-420 420W Solar Panel - Specs & Review | ComparePV" description: "Solar N Plus SP-N16/108HG-420 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solar-n-plus-sp-n16-108hg-420" updated: 2026-09-11 --- # Solar N Plus SP-N16/108HG-420 Middle of its segment, heavy for its output 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Solar N Plus - **Model:** SP-N16/108HG-420 - **Series:** SP-N16/108HG - **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) | 24.0 kg | 22.0 kg | Weak - bottom 13% | | | 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 | 57.1 | 51.4 | Weak - bottom 13% | 11,083 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **57.1 kg per kWp** - Bottom 13% of the TOPCon 400-450 W segment, against a median of 51.4. - **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 hot-climate. - **Not ideal for:** Weight-limited structures, 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):** 33.30 V - **Current at Pmax (Imp):** 12.61 A - **Open-circuit voltage (Voc):** 38.85 V - **Short-circuit current (Isc):** 13.46 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:** 42 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:** 24.0 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 | 2165 of 14005 | | Weight | 11083 of 14005 | | Warranty | 21 of 14005 | ## About this series The Solar N Plus SP-N16/108HG series is designed for maximum energy yield in situations where every square meter of roof space counts. These modules utilize **N-type cells in TOPCon technology**, which help minimize losses under real-world operating conditions, especially at higher temperatures and under variable sunlight. In practice, this translates to more predictable energy production and a better return on investment over the course of a year. The use of a **double-glass construction** enhances resistance to microcracks and material fatigue, which is important for installations exposed to wind, snow, and frequent thermal cycling. Another key feature is **bifaciality** - the module can also utilize reflected light from the ground, increasing energy yield in ground-mounted installations, on bright roofs, and on carport structures. This is a good choice for prosumers and companies that want **reduced degradation over time** and stable module performance over the long term, without compromising on quality. ## Notable figures - Efficiency of 21.5% matches the \*\*TOPCon 400-450W\*\* median - At 215.1 W/m², this panel generates 5.1 W/m² less per unit area than \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - At 24.0 kg, this panel is 2.0 kg heavier than the \*\*TOPCon 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What warranty does the Solar N Plus SP-N16/108HG series come with? The SP-N16/108HG series includes a 15-year product warranty covering material and workmanship defects, and a 30-year power output warranty guaranteeing at least 87.4% of rated power after three decades of operation. This is one of the longer power warranty standards available on the market, providing reliable investment planning over a 30-year horizon. ### Do the bifacial SP-N16/108HG modules actually produce more energy than standard panels? Yes. The bifacial design of the SP-N16/108HG captures irradiance from both the front and rear surfaces, harvesting light reflected from the ground, a light-colored roof, or surrounding surfaces. In practice this delivers an additional 5–25% energy yield depending on installation conditions. The gain is greatest in ground-mount systems, on light-colored surfaces, and in carport structures where the rear side of the module receives significant reflected irradiance. ### How does the SP-N16/108HG perform on hot summer days at high temperatures? The TOPCon N-type cell technology features a low temperature coefficient of approximately –0.29%/°C, outperforming conventional PERC modules. A 10°C rise in panel temperature causes only about 2.9% power loss — noticeably less than older technologies. In real-world conditions, where rooftop panel temperatures frequently exceed 60–70°C in summer, this translates into measurably higher actual energy yield. ### How does the glass-glass construction of the SP-N16/108HG differ from standard backsheet modules? Conventional panels use a polymer backsheet that can absorb moisture and develop microcracks over time. The SP-N16/108HG uses tempered glass on both sides, significantly improving mechanical strength, eliminating backsheet degradation risk, and extending module service life. The dual-glass structure handles thermal cycling, snow loads, and high-wind conditions more reliably — especially important for exposed rooftop and ground-mount installations. ### Is the SP-N16/108HG series suitable for installation on a standard pitched roof? Yes. The SP-N16/108HG modules measure 1722×1134×30 mm and weigh approximately 24 kg, compatible with standard rail-and-clamp racking systems used in residential rooftop installations. However, due to the dual-glass construction, these panels are heavier than backsheet modules. For larger systems, it is advisable to verify roof load capacity with your installer and select an appropriately rated mounting structure. ### What does the lower degradation rate of the SP-N16/108HG mean for a system owner? TOPCon N-type cells degrade more slowly than conventional PERC technology, with an annual power loss of approximately 0.35–0.40%. After 25 years the panel retains close to 90% of its initial output, and the manufacturer's warranty guarantees a minimum of 87.4% after 30 years. For the system owner this means more predictable energy production and greater savings over the long term without the need to replace modules prematurely. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/sp-n16-108hg420-440w-black-2024v3-0-7d559b8f8b52.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 | | [Solar N Plus SP-M10/108HG-395](https://comparepv.com/panel/solar-n-plus-sp-m10-108hg-395) | 395 W | -25 W, hotter, -1.3 pp | | [Solar N Plus SP-M10/108HG-400](https://comparepv.com/panel/solar-n-plus-sp-m10-108hg-400) | 400 W | -20 W, hotter, -1.0 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, lighter, +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, lighter, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, cooler, +3.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/solar-n-plus-sp-n16-108hg-420 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.