--- title: "Mysolar USA MS425N-DHBA 425W Solar Panel - Specs & Review | ComparePV" description: "Mysolar USA MS425N-DHBA 425W solar panel. Specs: 21.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/mysolar-usa-ms425n-dhba" updated: 2026-09-11 --- # Mysolar USA MS425N-DHBA Space saver, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Mysolar USA - **Model:** MS425N-DHBA - **Series:** ALTRA N-Type TOPCon Bifacial (N108) - **Rated power:** 425 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) | 425 W | 435 W | Typical | | | Module efficiency | 21.90% | 22.00% | Typical | 6,783 | | Power density | 222.7 | 220.2 | Strong - top 21% | 5,301 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | 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 | 21.90% | 22.00% | Typical | 6,783 | | Power density | 222.7 | 220.2 | Strong - top 21% | 5,301 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 51.8 | 51.4 | Typical | 5,132 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **222.7 watts per square metre** - Top 21% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.90 % - **Voltage at Pmax (Vmp):** 31.70 V - **Current at Pmax (Imp):** 13.41 A - **Open-circuit voltage (Voc):** 38.30 V - **Short-circuit current (Isc):** 14.15 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 - **Bifacial gain:** 25.50 ### Physical - **Length:** 1716 mm - **Width:** 1112 mm - **Thickness:** 51 mm - **Weight:** 22.0 kg - **Area:** 1.91 m2 - **Power density:** 222.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Output after 30 years:** 378 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6783 of 14005 | | Power density | 5301 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 5132 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-Type TOPCon technology** - N-type TOPCon cells exhibit lower LID/LeTID degradation and better high-temperature performance than older PERC cells, translating into more stable annual energy yield over the full 30-year service life. - **Bifacial with dual glass** - The bifacial dual-glass construction captures light reflected off the surrounding surface (light-colored roofs, gravel, snow), boosting energy yield, while also eliminating the backsheet delamination risk typical of glass-backsheet modules. - **Half-cut - shading tolerance** - The half-cut cell layout reduces losses under partial shading (leaves, chimneys, adjacent rows) and lowers internal resistance compared to full-size cells. - **Extended 25/30-year warranty** - The 25-year product warranty and 30-year linear power warranty exceed the market-standard 25/25 years, a meaningful factor in LCOE calculations for utility-scale and commercial installations. - **Efficiency competitive within segment** - Peak efficiency of 22.73% places the series above JA Solar JAM54D40 (22.5%) and Lina Energy LEPV 132 Ultra Premium (22.37%), approaching segment leader Luxor Solar Eco Line N-Type (22.86%) at the same 440 Wp max power. ## Cons - **Wide efficiency spread across series** - The lower bound of the efficiency range (21.7%) is notably below all three peer comparables (22.37-22.86%), meaning the weaker variants within the 5-variant N108 lineup meaningfully lag competitors - it is important to verify which specific variant is quoted. - **No confirmed BNEF Tier 1 status** - Mysolar USA states it aims to achieve BNEF Tier 1 status, but is not currently listed as a recognized Tier 1 manufacturer - unlike peer comparable JA Solar, an established Tier 1 supplier. This may complicate bank financing for large-scale projects. - **'USA' branding with China-registered HQ** - The manufacturer operates under the Mysolar USA brand, yet corporate HQ is registered in China (founded 2010), requiring extra verification for Domestic Content eligibility under U.S. IRA tax incentives on projects sourcing this equipment. ## About this series The Mysolar USA ALTRA N-Type TOPCon Bifacial (N108) series is designed for maximum energy yield in environments where standard modules struggle - on roofs with reflective surfaces, ground-mounted installations, and structures with increased durability requirements. Thanks to the **N-Type TOPCon** technology, the modules are better able to withstand degradation and maintain stable production over a longer period, which makes it easier to plan the profitability of the investment. The **bifacial** design allows for the use of light from both sides, increasing yield in diffuse light conditions and on bright surfaces. The use of **dual-glass** improves resistance to environmental factors and reduces the risk of problems associated with modules with rear-side films. Furthermore, the arrangement of cells in the **half-cut** version supports operation in partially shaded conditions and reduces internal losses. This is a good choice for PV farms, carports, commercial roofs, and installations where durability, predictability, and additional yield are important, without complicating the project. ## Notable figures - Efficiency of 21.9% matches the \*\*TOPCon 400-450W\*\* median - At 222.7 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - In the top 48% for efficiency among all TOPCon panels ## Questions ### What warranty does the Mysolar USA ALTRA N-Type TOPCon Bifacial N108 come with? The ALTRA N108 series carries a 25-year product warranty covering materials and workmanship, plus a 30-year linear power output warranty — among the longer commitments available on the market. After 30 years, the manufacturer guarantees at least 87% of rated power, which is a meaningful input when calculating the long-term LCOE of a solar project. ### Do the Mysolar USA ALTRA N108 panels lose significant power output during hot summer conditions? N-Type TOPCon technology features a low temperature coefficient of approximately -0.29%/°C (Pmax). When cell temperature rises to 60°C, the ALTRA N108 loses proportionally less power than a typical P-Type PERC module rated at around -0.34%/°C. During peak summer heat, this translates into measurably higher energy yield compared to legacy technologies under identical installation conditions. ### How much additional energy can I expect from the bifacial design of the ALTRA N108 panels? The bifacial construction of the ALTRA N108 can deliver 5–15% additional energy from the rear side, depending on ground albedo and tilt angle. The highest bifacial gains are achieved on ground-mounted systems over light-colored gravel or concrete, carports, and flat roofs with white membranes. On a typical gray surface, a realistic bifacial gain is approximately 7–10%. ### How does N-Type TOPCon technology in the ALTRA N108 series differ from standard PERC cells? N-Type TOPCon cells are manufactured on an n-type silicon substrate, which drastically reduces light-induced degradation (LID). The ultra-thin tunnel oxide passivation contact layer minimizes carrier recombination losses and raises conversion efficiency. In practice, this results in a higher rated output of 440 Wp, more stable long-term production, and lower first-year degradation compared to PERC technology. ### Is the double-glass ALTRA N108 suitable for a pitched roof — are the panels too heavy? Glass-glass modules in the ALTRA N108 series are slightly heavier than foil-backed panels, so it is worth verifying roof load capacity before installation on older buildings. The double-glass design does not exclude pitched roofs — it provides superior resistance to moisture, ammonia, and UV compared to EVA backsheets, and the 108-cell half-cut layout minimizes shading losses from chimneys or skylights. ### Is the Mysolar USA ALTRA N-Type TOPCon Bifacial N108 series still available for purchase? Yes, the ALTRA N108 series remains active in the product lineup and is available through authorized distributors. Modules rated up to 440 Wp with N-Type TOPCon technology and a bifacial glass-glass construction are in current production. For specific wattage variants or delivery timeframes, confirming stock levels directly with your distributor is recommended. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/mysolar-altra-topcon-n108-blackroof-frameless-bifacial-modul-2f36323ad30b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +50 W, +2.1 pp, +10 yr warranty | | [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 | +40 W, lighter, +1.9 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, cooler, +1.9 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, heavier, +1.9 pp | | [Astronergy CHSM48RN(DG)/F-BH-475](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-475) | 475 W | +50 W, heavier, +1.9 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +1.9 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +1.9 pp | | [Mysolar USA MS420N-DHBA](https://comparepv.com/panel/mysolar-usa-ms420n-dhba) | 420 W | Very close match | | [Mysolar USA MS430N-DHBA](https://comparepv.com/panel/mysolar-usa-ms430n-dhba) | 430 W | +0.3 pp | | [Mysolar USA MS435N-DHBA](https://comparepv.com/panel/mysolar-usa-ms435n-dhba) | 435 W | +10 W, +0.6 pp | | [Mysolar USA MS440N-DHBA](https://comparepv.com/panel/mysolar-usa-ms440n-dhba) | 440 W | +15 W, +0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, cooler, +3.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +2.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +2.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +2.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +75 W, cooler, +2.6 pp | --- Source: https://comparepv.com/panel/mysolar-usa-ms425n-dhba 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.