--- title: "MY Solar MS425N-DHBA Solar Panel: Specs & Datasheet | ComparePV" description: "MY Solar MS425N-DHBA solar panel. Specs: 21.96% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/my-solar-ms425n-dhba" image: "https://comparepv.com/og/panel/my-solar-ms425n-dhba.png" updated: 2026-09-11 --- # MY Solar MS425N-DHBA Solid all-round for its segment 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** MY Solar - **Model:** MS425N-DHBA - **Series:** ALTRA N-TYPE TopCon Bifacial BlackRoof FullBlack - **Rated power:** 425 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1220 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 425 W | 435 W | Typical | | | Module efficiency | 21.96% | 22.00% | Typical | 6,805 | | Power density | 219.6 | 220.2 | Typical | 6,764 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | 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 | 21.96% | 22.00% | Typical | 6,805 | | Power density | 219.6 | 220.2 | Typical | 6,764 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 51.8 | 51.5 | Typical | 5,163 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.96 % - **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:** 1128 mm - **Thickness:** 5 mm - **Weight:** 22.0 kg - **Area:** 1.94 m2 - **Power density:** 219.6 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 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 378 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6805 of 14129 | | Power density | 6764 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 5163 of 14129 | | Warranty | 21 of 14129 | ## Pros - **N-type TOPCon cells** - N-type technology eliminates the LID degradation typical of older P-type/PERC cells and delivers higher baseline efficiency (up to 22.73%), translating into more stable energy yield over the module's lifetime. - **Bifacial dual-side generation** - Bifacial cells recover additional energy from albedo (reflected irradiance), which under typical mounting conditions can boost annual yield by several to over ten percent compared to monofacial modules of the same rated power. - **FullBlack aesthetic for BlackRoof installs** - The black frame, black backsheet, and absence of visible cell gridlines create a uniform, premium-looking array - a strong selling point for modern rooftops and black-roof buildings, where conventional modules with visible busbars stand out visually. - **30-year linear power warranty** - The 30-year power warranty exceeds the industry-standard 25 years offered by comparable N-type series in the segment (e.g., JA Solar JAM54D40, Lina Energy LEPV 132 ULTRA PREMIUM), giving investors an extra 5 years of coverage against power degradation. - **Competitive efficiency vs. peers** - Efficiency up to 22.73% places the series above Lina Energy LEPV 132 ULTRA PREMIUM (22.37%) and close to JA Solar JAM54D40 (22.5%) at the same 440 Wp maximum power, confirming technological competitiveness within the N-type TOPCon segment. ## Cons - **No Tier-1 (BNEF) status** - Manufacturer MY Solar does not appear on the Bloomberg New Energy Finance Tier-1 list, unlike some peer comparables (e.g., JA Solar). This can limit access to bank financing without additional collateral and affect insurance terms for large commercial installations. - **Short market track record** - The series was introduced in 2023, meaning only about 3 years of field operational data are available as of 2026, compared to the multi-year documented performance histories of Tier-1 manufacturers - increasing uncertainty about real-world durability over the full 30-year warranty horizon. ## About this series The MY Solar ALTRA N-TYPE TopCon Bifacial BlackRoof FullBlack series represents a breakthrough in system design, where combining maximum efficiency with an impeccable appearance is key. The use of **N-type cells in TopCon technology** eliminates typical problems with initial degradation and guarantees significantly higher efficiency compared to standard P-type modules. A key innovation is the **Bifacial function**, which, thanks to double-sided cell activity, allows for energy recovery from reflected radiation, translating into a realistically higher return on investment in practice. These panels were designed with a **FullBlack aesthetic for BlackRoof-type roofs**, ensuring the installation creates a coherent, elegant surface on the building without visible cell construction elements. This solves the dilemma of modern homeowners seeking equipment that will not disrupt the building's architecture. Moreover, ALTRA modules are characterized by an excellent temperature coefficient, which ensures stable operation even on hot summer days. By choosing this solution, the user receives **increased resistance to micro-cracks** and exceptional mechanical durability, setting this series apart from mass-produced competitor products. It is the optimal choice for demanding prosumers for whom the highest quality of workmanship and long-term energy security of the building are essential. ## Notable figures - At 22.0% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 219.6 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 - Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface - #6805 for efficiency, #2220 for temperature performance out of 14129 panels ## Questions ### How do MY Solar ALTRA panels differ from standard P-type PERC modules? MY Solar ALTRA panels use N-type TOPCon cells, which eliminate the LID (light-induced degradation) effect common in P-type PERC modules. In practice this means higher conversion efficiency, a better temperature coefficient, and slower long-term degradation. The ALTRA series delivers measurably more energy over the full investment period compared to mass-market PERC panels available at a similar price point. ### What is the warranty on MY Solar ALTRA N-TYPE TopCon Bifacial FullBlack panels? MY Solar provides a 25-year product warranty covering material and workmanship defects for the ALTRA series. The power output warranty extends to 30 years, guaranteeing that the panel retains a specified minimum wattage along a linear degradation curve over three decades. This is among the longer performance warranty standards currently available in the residential PV module market. ### How much additional energy does the bifacial rear side of MY Solar ALTRA panels generate? The bifacial design of the ALTRA series allows the rear surface to capture irradiance reflected from the roof or ground. Actual energy gain depends on surface albedo and mounting angle, but under typical rooftop installation conditions with a white or light-colored surface, owners can expect 5 to 15 percent additional annual energy yield compared to a single-sided module with the same 440 Wp nameplate rating. ### Are MY Solar ALTRA FullBlack panels suitable for modern black roofs without affecting building aesthetics? Yes, the ALTRA series was designed specifically for aesthetic installations on BlackRoof-style rooftops. The black frame, black backsheet, and black busbars create a uniform, monochromatic surface with no visible silver cell contacts. The array blends seamlessly into the roof plane and does not disrupt the architecture of modern single-family homes, directly addressing the needs of homeowners for whom installation appearance matters as much as energy output. ### How do MY Solar ALTRA panels perform on hot days when the roof surface temperature is high? The N-type TOPCon cells used in the ALTRA series have a better temperature coefficient than standard P-type modules, meaning less power loss as cell temperature rises above 25°C. On hot summer days an ALTRA installation loses proportionally less output than comparable PERC modules, resulting in higher energy yield during the warmest months of the year. ### Is MY Solar a Tier 1 manufacturer, and how does that affect the choice of the ALTRA series? MY Solar is not currently listed in Tier 1 rankings by agencies such as BloombergNEF. This does not reflect on the module quality itself but primarily indicates a smaller production scale and shorter market history. When choosing the ALTRA series, pay close attention to the warranty terms offered by the Polish distributor and verify that the manufacturer holds current IEC 61215 and IEC 61730 certifications. ## 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, +2.0 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, +1.8 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, cooler, +1.8 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, heavier, +1.8 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, +1.8 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +1.8 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +1.8 pp | | [MY Solar MS420N-DHBA](https://comparepv.com/panel/my-solar-ms420n-dhba) | 420 W | -0.3 pp | | [MY Solar MS430N-DHBA](https://comparepv.com/panel/my-solar-ms430n-dhba) | 430 W | +0.2 pp | | [MY Solar MS435N-DHBA](https://comparepv.com/panel/my-solar-ms435n-dhba) | 435 W | +10 W, +0.5 pp | | [MY Solar MS440N-DHBA](https://comparepv.com/panel/my-solar-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, +3.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +2.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +2.7 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +80 W, heavier, +2.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +2.5 pp | --- Source: https://comparepv.com/panel/my-solar-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.