--- title: "WINAICO WST-405MGX-E5 Solar Panel: Specs & Datasheet | ComparePV" description: "WINAICO WST-405MGX-E5 solar panel. Specs: 20.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/winaico-wst-405mgx-e5" image: "https://comparepv.com/og/panel/winaico-wst-405mgx-e5.png" updated: 2026-10-23 --- # WINAICO WST-405MGX-E5 Middle of its segment, short guarantee 6,727 panels in the 305-505 W band, all technologies ## Identity - **Manufacturer:** WINAICO - **Model:** WST-405MGX-E5 - **Series:** WST-MGX-E5 GEMINI Series - **Rated power:** 405 W - **Cell technology:** Monocrystalline ## How it compares Compared against 305-505 W band, all technologies (6727 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 405 W | 435 W | Typical | | | Module efficiency | 20.80% | 21.30% | Typical | 10,533 | | Power density | 207.4 | 212.8 | Typical | 10,702 | | Temperature coefficient | -0.320 | -0.300 | Typical | 8,376 | | Weight (kg) | 21.7 kg | 22.6 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 18% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.80% | 21.30% | Typical | 10,533 | | Power density | 207.4 | 212.8 | Typical | 10,702 | | Temperature coefficient | -0.320 | -0.300 | Typical | 8,376 | | Weight per kWp | 53.6 | 53.2 | Typical | 7,668 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 18% | 9,912 | ### Watch out for - **25 year performance warranty** - Bottom 18% of the 305-505 W band, against a median of 30 yrs. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.80 % - **Voltage at Pmax (Vmp):** 31.36 V - **Current at Pmax (Imp):** 12.92 A - **Open-circuit voltage (Voc):** 37.36 V - **Short-circuit current (Isc):** 13.78 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.320 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 21.7 kg - **Area:** 1.95 m2 - **Power density:** 207.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 85.3 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.53 % - **Output after 30 years:** 335 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10533 of 14129 | | Power density | 10702 of 14129 | | Temperature coefficient | 8376 of 14129 | | Weight | 7668 of 14129 | | Warranty | 9912 of 14129 | ## About this series The WST-MGX-E5 GEMINI series from WINAICO is built for installers and investors looking for a genuinely versatile panel - equally at home on residential rooftops and in commercial-scale installations. The modules use **monocrystalline half-cut cells** arranged across six independent strings, reducing power loss under partial shading while improving the panel's mechanical resilience. The **Full Black** version alongside the standard white-backsheet variant gives flexibility in aesthetics depending on the project and the investor's expectations. The panels stand out thanks to a robust build - a **black anodized aluminum frame**, 3.2 mm glass, and Staubli MC4-EVO2 connectors paired with an IP68 junction box - translating into strong resistance to harsh climate conditions, including wind and snow loads. A key advantage is the **25-year product warranty and linear performance warranty**, guaranteeing degradation of no more than 0.53% per year, which meaningfully lowers the levelized cost of energy (LCOE) over the system's lifetime. The modules are manufactured in the USA, an added argument for markets that favor domestically sourced components and strict UL certification compliance. It's a solution for anyone who values durability, aesthetics, and predictable long-term performance. ## Notable figures - Module efficiency of 20.8% is 1.0pp below average for \*\*database\*\* panels (median: 21.8%) - 207.4 W/m² power density is 10.7 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - Temperature coefficient of -0.32%/°C is 0.02pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - Weight of 21.7 kg (4.8 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - #10533 for efficiency, #8376 for temperature performance out of 14129 panels ## Questions ### What is the warranty on WINAICO WST-MGX-E5 GEMINI solar panels? The WST-MGX-E5 GEMINI series comes with a 25-year product warranty and a 25-year linear power warranty. WINAICO guarantees annual power degradation will not exceed 0.53%, ensuring stable, predictable energy output throughout the system's lifetime and a lower levelized cost of energy (LCOE). ### How do half-cut cells in the GEMINI panels differ from standard full-cell modules? GEMINI panels use monocrystalline half-cut cells arranged across six independent strings. This design reduces power losses from partial shading, such as from chimneys or trees, and lowers mechanical stress within the module, improving resistance to microcracks and extending overall service life. ### Are the WST-MGX-E5 GEMINI panels bifacial? No, the WST-MGX-E5 GEMINI series is a monofacial panel, optimized for typical pitched-roof and commercial installations where the extra yield from rear-side reflected light would offer no practical benefit. ### Is the Full Black version of the GEMINI panel worth choosing for installations not visible from the street? The Full Black variant is primarily an aesthetic choice, best suited for projects where roof or facade appearance matters to the investor. For less visible installations, the classic white-backsheet version works equally well, since both variants share identical electrical and mechanical specifications with no impact on performance or durability. ### How well do the GEMINI panels handle snow and wind loads? GEMINI modules feature a black anodized aluminum frame and 3.2 mm glass, providing high structural rigidity. Combined with Staubli MC4-EVO2 connectors and an IP68-rated junction box, the panels are built to withstand demanding climate conditions, including heavy snow and strong wind loads. ### Are WINAICO GEMINI panels made in the USA, and does that matter for UL certification? Yes, the WST-MGX-E5 GEMINI series is manufactured in the United States. For installers and investors in markets favoring locally sourced components and requiring compliance with US UL certification standards, this is a meaningful advantage when choosing a module supplier. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/WINAICO_Datasheet_WST-410MGX-E5_US_1123-f6ebd187de18.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.5 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.5 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, +2.5 pp, +5 yr warranty | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.5 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.5 pp | | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | 455 W | +50 W, +2.5 pp, +5 yr warranty | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.5 pp | | [WINAICO WST-400MGX-P3 Full Black](https://comparepv.com/panel/winaico-wst-400mgx-p3-full-black) | 400 W | Hotter, -0.4 pp | | [WINAICO WST-410MGX-P3](https://comparepv.com/panel/winaico-wst-410mgx-p3) | 410 W | Hotter | | [WINAICO WST-410MGX-E3](https://comparepv.com/panel/winaico-wst-410mgx-e3) | 410 W | Hotter | | [WINAICO WST-415MGX-E3](https://comparepv.com/panel/winaico-wst-415mgx-e3) | 415 W | +10 W, hotter, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +3.9 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.7 pp | --- Source: https://comparepv.com/panel/winaico-wst-405mgx-e5 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.