--- title: "AmoSolar AS420M10-108BM 420W Solar Panel - Specs & Review | ComparePV" description: "AmoSolar AS420M10-108BM 420W solar panel. Specs: 21.51% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/amosolar-as420m10-108bm" updated: 2026-09-11 --- # AmoSolar AS420M10-108BM Middle of its segment, needs the roof space 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** AmoSolar - **Model:** AS420M10-108BM - **Series:** AS410-430M10-108BM - **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 | 21.51% | 22.00% | Weak - bottom 20% | 7,894 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.5 kg | 22.0 kg | Weak - bottom 23% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.51% | 22.00% | Weak - bottom 20% | 7,894 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 56.0 | 51.4 | Weak - bottom 23% | 10,286 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **21.51% module efficiency** - Bottom 20% of the TOPCon 400-450 W segment, against a median of 22.00%. - **56.0 kg per kWp** - Bottom 23% of the TOPCon 400-450 W segment, against a median of 51.4. - **Best for:** Residential, commercial, shaded-installations and hot-climate. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.51 % - **Voltage at Pmax (Vmp):** 31.63 V - **Current at Pmax (Imp):** 13.28 A - **Open-circuit voltage (Voc):** 38.49 V - **Short-circuit current (Isc):** 13.99 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:** 23.5 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 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7894 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 10286 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon solar cells – lower degradation** - The TOPCon N-type technology exhibits a lower LID degradation rate (\<0.5% per year) and better performance at high temperatures compared to older PERC P-type cells. This translates to a significantly higher annual energy yield – particularly in the summer, on dark roof coverings typical of the Polish market. - **The module's efficiency reaches 22.02%.** - The highest variant of the series achieves 22.02%, placing AmoSolar AS430 on par with VSUN N-108MH-BW (22.02%) and significantly above Silfab Elite (21.4%) from the same product group. For installations with limited roof space, this translates to a higher power output per square meter. - **Bifacial construction – additional energy generation from the rear** - The double-sided construction of the module allows for the absorption of reflected light from the ground, typically increasing production by 5–15% depending on the albedo coefficient (e.g., light gravel, concrete, snow). This effect is particularly noticeable when installed on the ground or on light, flat roofs with larger gaps. - **30-year power guarantee** - The manufacturer offers a 30-year linear power warranty, which exceeds the standard 25 years offered by most Tier 1 manufacturers (e.g., Trina Solar, JA Solar). This provides additional protection for the value of the installation over its entire lifespan. - **M10 format, with 108 cells – practical dimensions** - With dimensions of 1722 x 1134 x 30 mm and a weight of approximately 24.2 kg, these products meet the standard for compatibility with common BOS mounting systems and accessories (MC4 connectors, IP68 enclosure). The packaging format of 36 units per pallet simplifies logistics for typical residential and commercial installations. ## Cons - **Lack of Tier 1 BNEF status – financing risk** - AmoSolar is not listed on BloombergNEF's Tier 1 bankable manufacturers list. This may mean a higher cost of capital or the need to obtain additional technical assessments for installations that require bank financing or leasing. Companies like Silfab and VSUN are more widely recognized by financing institutions in the European market. - **15-year product warranty – below the market standard** - Tier 1 manufacturers (LONGi, Trina, JA Solar) typically offer a 25-year warranty on their products. AmoSolar offers a 15-year warranty, which, in the event of a material or manufacturing defect discovered after this period, shifts the full cost of replacement onto the installer. The 10-year difference is significant, given the typical 25-30 year investment horizon for PV systems. ## About this series The AmoSolar AS410-430M10-108BM series is a range of modules designed for high energy production, even under less-than-ideal roof conditions. The use of **N-type cells in TOPCon technology** ensures stable performance over time and improved efficiency at higher temperatures, which is particularly beneficial during the summer months and on dark roof surfaces. The **bifacial** design further allows for the utilization of reflected light - especially on light-colored roofs, when mounted on the ground, or in systems with greater spacing. The panel features a **108-cell layout in M10 format**, which simplifies the design of installations with high power density while maintaining practical transportation and installation dimensions. For investors, the **long, multi-year product warranty and power output warranty** are also important, supporting profitability over decades. This is a good choice for residential and commercial installations, where predictable energy production, resistance to yield fluctuations, and reliable performance in the variable Polish climate are key considerations. ## Notable figures - Efficiency of 21.5% matches the \*\*TOPCon 400-450W\*\* median - 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 - At 23.5 kg, this panel is 1.5 kg heavier than the \*\*TOPCon 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Ranked #7894 out of 14005 panels for efficiency in the database ## Questions ### What warranty is provided for the AmoSolar AS410-430M10-108BM panels and what does it cover? The AS410-430M10-108BM series is backed by a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. This means the manufacturer commits to a gradual, predictable performance degradation over three decades — providing a solid basis for calculating return on investment. The power output warranty is a particularly critical parameter when assessing the financial viability of residential or commercial PV installations. ### What is TOPCon technology and why does the AmoSolar AS410-430M10-108BM series use it? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that minimizes carrier recombination at the silicon surface. In practice, this translates to higher efficiency compared to legacy PERC cells and improved long-term stability — meaning lower degradation rates over years of operation. The AS410-430M10-108BM series leverages this technology to deliver more consistent energy yield, particularly during summer months when rooftop temperatures can exceed 70°C. ### Does the bifacial design of the AS410-430M10-108BM actually increase energy production? Yes, but the gain depends on installation conditions. Bifacial means the rear side of the panel also captures light reflected from the ground or roof surface. The greatest benefit — potentially several to over ten percent additional yield — is achieved in ground-mounted systems, installations over light-colored roofing surfaces, or configurations with significant clearance beneath the modules. On a typical dark-colored pitched roof with a narrow air gap, the bifacial gain will be minimal, though the underlying N-type technology still delivers high efficiency regardless. ### What are the dimensions and weight of the AmoSolar AS410-430M10-108BM panels — will they fit on a small roof? Modules in the AS410-430M10-108BM series measure approximately 1722 × 1134 mm and weigh around 24 kg. The 108-cell layout in M10 format achieves a favorable power density at relatively compact dimensions, making it easier to design installations on roofs with limited available area. The 24 kg weight falls within the standard range for modules in this power class and presents no issues for typical rafter or purlin mounting systems. ### Will the AmoSolar AS410-430M10-108BM panels perform well in the Polish climate with its high weather variability? Yes. N-type TOPCon cells exhibit a lower temperature coefficient than older PERC cells, resulting in reduced power losses on hot days. At the same time, bifacial modules handle diffuse irradiance and low solar angles more effectively — conditions that are typical during Polish autumn and winter. The IP68-rated junction box ensures resistance to moisture and variable weather conditions, which is essential for reliable operation over a multi-decade system lifetime. ### Is AmoSolar a Tier 1 manufacturer and should their panels be trusted? AmoSolar is not currently listed among Tier 1 manufacturers according to the Bloomberg NEF classification. This means the company is a smaller market player without an established track record of bankable financing guarantees. Particular attention should be paid to the warranty terms and to identifying who services the warranty on the Polish market. The underlying N-type TOPCon technology is well-proven; however, when selecting a lesser-known brand, it is advisable to purchase through an authorized distributor that provides local after-sales support. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Topcon-410-430-Bifacial-c0b029571338.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 | | [AmoSolar AS390M10-108](https://comparepv.com/panel/amosolar-as390m10-108) | 390 W | Hotter, -1.5 pp, -5 yr warranty | | [AmoSolar AS395M10-108](https://comparepv.com/panel/amosolar-as395m10-108) | 395 W | Hotter, -1.3 pp, -5 yr warranty | | [AmoSolar AS400M10-108](https://comparepv.com/panel/amosolar-as400m10-108) | 400 W | Hotter, -1.0 pp, -5 yr warranty | | [AmoSolar AS405M10-108](https://comparepv.com/panel/amosolar-as405m10-108) | 405 W | Hotter, -0.8 pp, -5 yr warranty | | [AmoSolar AS410M10-108](https://comparepv.com/panel/amosolar-as410m10-108) | 410 W | Hotter, -0.5 pp, -5 yr warranty | | [AmoSolar AS415M10-108](https://comparepv.com/panel/amosolar-as415m10-108) | 415 W | Hotter, lighter, -5 yr warranty | | [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 | --- Source: https://comparepv.com/panel/amosolar-as420m10-108bm 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.