--- title: "WINAICO WST-425NGXB-D3 Full Black Solar Panel: Specs & Datasheet | ComparePV" description: "WINAICO WST-425NGXB-D3 Full Black solar panel. Specs: 21.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/winaico-wst-425ngxb-d3-full-black" image: "https://comparepv.com/og/panel/winaico-wst-425ngxb-d3-full-black.png" updated: 2026-10-23 --- # WINAICO WST-425NGXB-D3 Full Black Middle of its segment, heavy for its output 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** WINAICO - **Model:** WST-425NGXB-D3 Full Black - **Series:** WST-NGXB-D3 Series - **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 | 21.80% | 22.00% | Typical | 7,085 | | Power density | 217.6 | 220.2 | Typical | 7,235 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,152 | | Weight (kg) | 24.0 kg | 22.0 kg | Weak - bottom 18% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.80% | 22.00% | Typical | 7,085 | | Power density | 217.6 | 220.2 | Typical | 7,235 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,152 | | Weight per kWp | 56.5 | 51.5 | Weak - bottom 18% | 10,746 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **56.5 kg per kWp** - Bottom 18% of the TOPCon 400-450 W segment, against a median of 51.5. - **Best for:** Residential and BIPV. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.80 % - **Voltage at Pmax (Vmp):** 32.35 V - **Current at Pmax (Imp):** 13.14 A - **Open-circuit voltage (Voc):** 38.54 V - **Short-circuit current (Isc):** 13.79 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:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 24.0 kg - **Area:** 1.95 m2 - **Power density:** 217.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 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:** 371 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7085 of 14129 | | Power density | 7235 of 14129 | | Temperature coefficient | 6152 of 14129 | | Weight | 10746 of 14129 | | Warranty | 21 of 14129 | ## About this series The WST-NGXB-D3 Full Black series is built for residential installations that need to perform as well as they look. With a fully black aesthetic - black frame, black rear glass and a dark cell layer - the module blends seamlessly into the roof, instantly setting it apart from conventional panels with white backsheets. At the heart of the series are **monocrystalline N-type TOPCon cells**, which deliver higher conversion efficiency than older P-type structures and handle high roof operating temperatures better. The **bifacial glass-glass construction** captures light reflected off the surface beneath the panel, boosting energy yield without requiring extra mounting space. The panels are **resistant to PID and LID degradation**, translating into stable output over decades, while the glass-glass design further improves mechanical durability and resistance to moisture and physical damage. The series also stands out for its **improved performance in low-light conditions**, which matters on overcast days or with partial shading, both common on Polish roofs. PFAS-free manufacturing makes it an attractive choice for environmentally conscious investors. It is a fitting option for homeowners who want premium aesthetics, high reliability and a long-term 30-year warranty. ## Notable figures - Efficiency of 21.8% matches the \*\*TOPCon 400-450W\*\* median - At 217.6 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 400-450W\*\* median - Weight of 24.0 kg is 2.0 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What warranty comes with WINAICO WST-NGXB-D3 solar panels? The WST-NGXB-D3 series comes with a 30-year product warranty and a 30-year linear power performance warranty. This is one of the longest warranty periods on the market, reflecting the manufacturer's confidence in the glass-glass construction and the resistance of TOPCon cells to degradation. For homeowners, this means real investment security over three decades of PV system operation. ### How do TOPCon cells in the WST-NGXB-D3 differ from standard PERC cells? N-type TOPCon cells achieve higher conversion efficiency than older P-type cells used in PERC technology, especially at the high operating temperatures typical of rooftop panels. This means smaller output drops on hot summer days and better performance under low-light conditions, which translates into a higher annual energy yield from the same roof area. ### Are WST-NGXB-D3 Full Black panels suitable for a sloped roof on a single-family home? Yes, the WST-NGXB-D3 Full Black series is specifically designed for residential installations on sloped roofs. The black frame, black rear glass, and dark cell surface allow the modules to blend into the roof without the white gaps typical of classic panels, which matters especially on visible, sloped roof sections of single-family homes. ### What is bifacial glass-glass construction and is it worth paying extra for? Double-glass bifacial construction means the panel captures not only direct sunlight but also light reflected from the surface beneath the module, increasing energy yield without requiring additional mounting area. In addition, glass-glass improves mechanical durability and moisture resistance compared to glass-foil construction. The actual bifacial gain depends on the mounting background, but the added durability is a benefit regardless of conditions. ### What is the maximum power output of the WST-NGXB-D3 series and how many panels are needed for a typical home installation? Panels in the WST-NGXB-D3 series reach a maximum power output of up to 430 Wp. For a typical 5-6 kWp residential system, you generally need 12-14 modules, depending on the specific power variant and available roof space. The high per-unit power output means fewer panels are needed to achieve the same energy yield as older, lower-wattage models. ### Are WINAICO WST-NGXB-D3 panels resistant to PID and LID degradation? Yes, modules in the WST-NGXB-D3 series are resistant to Potential Induced Degradation (PID) and Light Induced Degradation (LID), ensuring stable energy production over decades without the sudden power drops typical of lower-quality cells. Combined with glass-glass construction and a 30-year power warranty, this provides predictable long-term returns on a PV system investment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/WINAICO_WST-430NGXB-D3_EU_1124-1-f10d65c7d18b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +50 W, +2.2 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, +2.0 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, lighter, +2.0 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, cooler, +2.0 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, cooler, +2.0 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +2.0 pp | | [WINAICO WST-400MGX-P3 Full Black](https://comparepv.com/panel/winaico-wst-400mgx-p3-full-black) | 400 W | Hotter, -1.4 pp, -5 yr warranty | | [WINAICO WST-405MGX-E5](https://comparepv.com/panel/winaico-wst-405mgx-e5) | 405 W | Lighter, -1.0 pp, -5 yr warranty | | [WINAICO WST-410MGX-P3](https://comparepv.com/panel/winaico-wst-410mgx-p3) | 410 W | Hotter, -0.9 pp, -5 yr warranty | | [WINAICO WST-410MGX-E3](https://comparepv.com/panel/winaico-wst-410mgx-e3) | 410 W | Hotter, -0.8 pp, -5 yr warranty | | [WINAICO WST-415MGX-E3](https://comparepv.com/panel/winaico-wst-415mgx-e3) | 415 W | Hotter, -0.5 pp, -5 yr warranty | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +2.9 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +80 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/winaico-wst-425ngxb-d3-full-black Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.