--- title: "Q-Cells Q.PEAK DUO M-G11S 405 405W Solar Panel - Specs & Review | ComparePV" description: "Q-Cells Q.PEAK DUO M-G11S 405 405W solar panel. Specs: 20.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hanwha-q-cells-gmbh-q-peak-duo-m-g11s-405" updated: 2026-09-11 --- # Q-Cells Q.PEAK DUO M-G11S 405 Middle of its segment, short guarantee 6,665 panels in the 305-505 W band, all technologies ## Identity - **Manufacturer:** Q-Cells - **Model:** Q.PEAK DUO M-G11S 405 - **Series:** Q.PEAK DUO M-G11S - **Rated power:** 405 W - **Cell technology:** Monocrystalline ## How it compares Compared against 305-505 W band, all technologies (6665 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 405 W | 435 W | Typical | | | Module efficiency | 20.70% | 21.30% | Typical | 10,764 | | Power density | 207.4 | 212.8 | Typical | 10,626 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight (kg) | 21.1 kg | 22.6 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 18% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.70% | 21.30% | Typical | 10,764 | | Power density | 207.4 | 212.8 | Typical | 10,626 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight per kWp | 52.1 | 53.2 | Typical | 5,546 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 18% | 9,798 | ### 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:** 20.70 % - **Voltage at Pmax (Vmp):** 30.62 V - **Current at Pmax (Imp):** 13.23 A - **Open-circuit voltage (Voc):** 37.09 V - **Short-circuit current (Isc):** 13.91 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.270 %/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:** 30 mm - **Weight:** 21.1 kg - **Area:** 1.95 m2 - **Power density:** 207.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 86.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 338 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10764 of 14005 | | Power density | 10626 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 5546 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Q.ANTUM DUO Z gapless cell technology** - Half-cut cells with no gaps between cells allow more power to be packed into a smaller module footprint (up to 420 Wp with 108 cells), which matters for limited roof space. - **Comprehensive Yield Security protection package** - The Anti-LID, Anti-LeTID, Anti-PID, and Hot-Spot Protect suite minimizes light- and voltage-induced degradation, supporting a more stable energy yield over a 25-year service life. - **High mechanical resistance to snow and wind loads** - The aluminum frame is certified for snow loads up to 8,100 Pa and wind loads up to 4,000 Pa, making this series a solid fit for the Polish climate with periodically heavy snowfall. - **Tier-1, bankable manufacturer with long track record** - Q-Cells (Hanwha, South Korea, founded 1999) is regarded as a reliable Tier-1 supplier, easing project financing through banks and leasing companies regardless of a specific series' lifecycle status. - **Independent TÜV Rheinland quality certification** - Q-Cells was the first manufacturer to pass TÜV Rheinland's "Quality Controlled PV" program, providing an additional layer of manufacturing quality assurance beyond standard IEC certifications. ## Cons - **Discontinued production** - The Q.PEAK DUO M-G11S series dates from 2022 and has been discontinued in favor of the successor M-G11S+, meaning limited availability of remaining stock and less certainty around spare-part/service support going forward. - **Efficiency below the segment's top performers** - Max efficiency of 21.5% is on par with GCL-M10/54H and RedSolar P series (21.5-21.52%) but noticeably below Jinko Solar's JS-PERC (21.7%), meaning slightly lower yield per unit area at the same footprint. - **Shorter product warranty than some peers** - The 12-year product warranty reflects older PERC-generation standards - newer TOPCon series from competitors often offer 15-25 years of product warranty at comparable power, which may weigh against this series in investor comparisons. ## About this series The Q-Cells Q.PEAK DUO M-G11S solar panel series sets new standards in performance thanks to the use of proprietary **Q.ANTUM DUO Z** technology. The innovative design eliminates gaps between cells, allowing for maximum utilization of the available module surface and generating more energy even from limited roof space. The use of larger M10 wafers translates into higher power output, making this series an ideal solution for those seeking a compromise between compact size and maximum efficiency. A key differentiator is the advanced **Yield Security** protection, which effectively eliminates the risk of light-induced degradation (LID) and PID phenomena. This ensures that investors can be certain their installation will maintain peak efficiency for decades, regardless of changing weather conditions. These modules also feature exceptional **mechanical stability**, which is vital in the Polish climate with heavy snow and wind loads. This offer is aimed at conscious homeowners and businesses that value modern aesthetics combined with reliability. Compared to the competition, the M-G11S series offers **better performance in low light conditions**, which directly translates into real savings and a significantly faster return on investment. ## Notable figures - At 20.7% efficiency, this panel is 1.1pp below the \*\*database\*\* median of 21.8% - At 207.4 W/m², this panel generates 10.7 W/m² less per unit area than \*\*database\*\* median (218.1 W/m²) - At -0.34%/°C, loses 0.04pp more power per degree than \*\*database\*\* median (-0.30%/°C) - At 21.1 kg, this panel is 5.4 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - Ranked #10764 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Q-Cells Q.PEAK DUO M-G11S come with? The Q.PEAK DUO M-G11S series includes a 12-year product warranty covering manufacturing defects and a 25-year linear power output warranty. Q-Cells guarantees the module will retain at least 84.8% of its rated power after 25 years of operation. This level of coverage is standard for Tier 1 manufacturers like Q-Cells, headquartered in South Korea. ### What is Q.ANTUM DUO Z technology used in the M-G11S series and why does it matter? Q.ANTUM DUO Z is Q-Cells' proprietary cell technology combining half-cut M10 wafer cells with a zero-gap cell layout that eliminates inactive space between cells. This allows the roughly 1.7 m² module to achieve up to 420 Wp and an efficiency above 21%. The zero-gap design maximizes the active area of each module, delivering more power from the same roof space compared to conventional PERC modules. ### How does the Q.PEAK DUO M-G11S perform in overcast or low-irradiance conditions? The M-G11S series was specifically engineered for strong low-light performance. Q.ANTUM DUO Z technology improves collection of diffuse irradiance, which results in higher energy yields on cloudy or overcast days — conditions common in Central and Northern Europe. Installers report measurable generation gains in spring and autumn compared to standard PERC modules of similar wattage. ### Can the M-G11S panels handle heavy snow loads typical of Central European winters? Yes. The Q.PEAK DUO M-G11S is rated for snow loads up to 5,400 Pa depending on the mounting configuration, making it well-suited for Central European climates with prolonged heavy snowfall. The anodized aluminum frame and tempered glass front sheet are engineered to maintain structural integrity across the full 25-year power warranty period. ### Does the Q.PEAK DUO M-G11S protect against LID and PID degradation? Yes. The Yield Security protection built into this series actively prevents both Light Induced Degradation (LID) and Potential Induced Degradation (PID). This means the module will not suffer unexpected early-life power loss — a common issue with lower-grade panels. Additional Hot-Spot Protect technology reduces the risk of cell overheating under partial shading, extending the module's useful service life. ### Is the Q-Cells Q.PEAK DUO M-G11S series still available for purchase? The Q.PEAK DUO M-G11S series has been discontinued and is no longer in active production or distribution by Q-Cells. Limited stock may still be found at some distributors, but availability is not guaranteed and supply chain continuity cannot be assured. Buyers planning new installations should consider current Q-Cells generations such as the Q.PEAK DUO M-G12 or later, which offer higher wattage and an extended product warranty. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Qcells-Data-sheet-QPEAK-DUO-M-G11S-series-400-420-2023-03-R-70fb949f9118.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.6 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.6 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, cooler, +2.6 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.6 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.6 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, +2.6 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, +2.6 pp | | [Q-Cells Q.PEAK DUO BLK M-G11S 390](https://comparepv.com/panel/hanwha-q-cells-gmbh-q-peak-duo-blk-m-g11s-390) | 390 W | -15 W, -0.7 pp | | [Q-Cells Q.PEAK DUO BLK M-G11S 395](https://comparepv.com/panel/hanwha-q-cells-gmbh-q-peak-duo-blk-m-g11s-395) | 395 W | -10 W, -0.5 pp | | [Q-Cells Q.PEAK DUO M-G11S 400](https://comparepv.com/panel/hanwha-q-cells-gmbh-q-peak-duo-m-g11s-400) | 400 W | Very close match | | [Q-Cells Q.PEAK DUO M-G11S 410](https://comparepv.com/panel/hanwha-q-cells-gmbh-q-peak-duo-m-g11s-410) | 410 W | +0.3 pp | | [Q-Cells Q.TRON BLK M-G2+ 415](https://comparepv.com/panel/hanwha-q-cells-q-tron-blk-m-g2-415) | 415 W | +10 W, cooler, +0.6 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +4.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/hanwha-q-cells-gmbh-q-peak-duo-m-g11s-405 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.