--- title: "DualSun DS425-108M10TB-03 425W Solar Panel - Specs & Review | ComparePV" description: "DualSun DS425-108M10TB-03 425W solar panel. Specs: 21.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/huasun-ds425-108m10tb-03" updated: 2026-09-11 --- # DualSun DS425-108M10TB-03 Middle of its segment, heavy for its output 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** DualSun - **Model:** DS425-108M10TB-03 - **Series:** FLASH - **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 | 21.80% | 22.00% | Typical | 7,022 | | Power density | 217.6 | 220.2 | Typical | 7,172 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight (kg) | 25.1 kg | 22.0 kg | Weak - bottom 6% | | | 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 | 7,022 | | Power density | 217.6 | 220.2 | Typical | 7,172 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight per kWp | 59.1 | 51.4 | Weak - bottom 6% | 11,999 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **59.1 kg per kWp** - Bottom 6% of the TOPCon 400-450 W segment, against a median of 51.4. Ranked 11,999th in the whole database. - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.80 % - **Voltage at Pmax (Vmp):** 32.21 V - **Current at Pmax (Imp):** 13.20 A - **Open-circuit voltage (Voc):** 38.58 V - **Short-circuit current (Isc):** 13.83 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.038 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 25.1 kg - **Area:** 1.95 m2 - **Power density:** 217.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 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 | 7022 of 14005 | | Power density | 7172 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 11999 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Highest Efficiency Among Peers** - The module achieves 21.8% efficiency, outperforming all direct competitors in the comparison: Hyundai DG G12 PERC Shingled (21.4%), Tongwei TERRA 5K (21.4%), and Trina Solar Vertex S (21.3%). Given the same roof area, the FLASH 425 will generate measurably more energy. - **N-Type TOPCon vs. Competitors' PERC** - N-type TOPCon half-cut cells exhibit a lower LID (Light-Induced Degradation) rate and a superior temperature coefficient of power compared to the PERC cells used by Hyundai in the DG G12 series. This translates into higher annual energy yield, particularly during summer months and in hot climates. - **30-Year Linear Power Warranty (87.4% Pmax)** - DualSun guarantees ≥87.4% of rated power output after 30 years (25-year product warranty + 5-year extended warranty). Trina Solar Vertex S and Hyundai DG G12 offer a standard 25-year power warranty, giving the FLASH a tangible financial advantage in long-payback-horizon projects such as commercial installations and ground-lease developments. - **Certified Low Carbon Footprint** - The panel emits 20–22 g CO₂eq/kWh over its full life cycle, placing it among the top performers on the market (typical modules: 20–30 g). CERTISOLIS certification (carbon footprint \<550 kg CO₂eq/kWp) and PEP Ecopassport enable the installation to be included in ESG reporting and to meet EU green public procurement requirements. The use of low-carbon silicon reduces the carbon footprint by 17% vs. modules without this optimization. - **Bifacial Glass-Glass Construction with Durable POE Encapsulation** - The glass-glass design with POE encapsulation ensures superior moisture impermeability—critical for moisture-sensitive N-type cells—and enhanced mechanical resistance. The bifacial configuration offers a potential +10% energy gain from albedo on high-reflectivity surfaces (snow, gravel, light-colored membranes), as documented in the manufacturer's official datasheet. ## Cons - **Higher Weight: 23.6 kg (Glass-Glass)** - The dual-glass construction (2+2 mm) raises the module weight to 23.6 kg, whereas comparable glass-backsheet modules (e.g., Trina Vertex S) weigh approximately 19–21 kg. This necessitates a structural load-bearing assessment of the roof and may increase installation time, particularly on steep-pitch roofs or in hard-to-access locations. ## About this series The **DualSun FLASH** series is a new generation of photovoltaic panels that combine advanced cell technology with exceptional structural durability. The use of **TOPCon half-cut cells** - an evolution of the classic PERC technology - significantly reduces energy losses at metallic contacts and on the silicon surface, resulting in higher performance even in partially shaded conditions. The **glass-glass design with double-sided glass** and POE encapsulation provide robust protection against moisture, which is particularly important for sensitive TOPCon cells. Thanks to **bifaciality, the panel can generate up to 10% more energy** by absorbing reflected radiation from the ground - an ideal solution for ground-mounted and roof-mounted installations with reflective surfaces. A key feature of the series is **low carbon footprint**, confirmed by the PEP certificate and the use of low-emission silicon, making FLASH a response to the growing environmental demands of institutional investors and companies subject to ESG reporting. The 30-year linear warranty makes the series suitable for both prosumer and larger commercial installations. ## Notable figures - At 21.8% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 217.6 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.31%/°C is 0.02pp worse than \*\*TOPCon 400-450W\*\* median (-0.29%/°C) - higher losses in summer heat - At 25.1 kg, this panel is 3.1 kg heavier than the \*\*TOPCon 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What warranty does the DualSun FLASH series carry and what does it cover? The DualSun FLASH series comes with a 25-year product warranty covering material and manufacturing defects, as well as a 30-year linear power output warranty guaranteeing at least 87.4% of nominal power after 30 years of operation. This is one of the longest power warranties available on the market, making the FLASH an excellent choice for both residential installations and commercial projects evaluated over extended financial horizons. ### How does the TOPCon technology used in DualSun FLASH panels differ from the older PERC technology? The half-cut TOPCon cells used in the FLASH series represent an evolution of PERC technology. An additional tunnel oxide layer on the rear surface of the cell reduces charge carrier recombination, resulting in higher efficiency — FLASH panels achieve a guaranteed efficiency exceeding 22.6%. In practice, this translates to more kilowatt-hours from the same roof area compared to standard PERC panels. ### Does the bifacial design of DualSun FLASH panels make sense on a pitched roof? Bifacial gain is greatest where the rear side of the panel has access to reflected irradiance — primarily in ground-mounted systems or flat-roof installations with a light-colored membrane. On a pitched roof covered with dark tiles, the gain will be minimal. That said, the FLASH has a bifaciality factor of approximately 80%, so even with limited rear-side reflection, the rear surface can still contribute a few additional percentage points to annual energy yield. ### What is the peak power output of the DualSun FLASH 425 and how does it compare to the competition? The DualSun FLASH 425 delivers a peak power output of 425 Wp at an efficiency exceeding 22.6%, placing it in the upper tier of modules for prosumer and small commercial installations. The glass-glass construction with POE encapsulation combined with half-cut TOPCon cell technology minimizes long-term degradation — the FLASH series annual degradation rate is lower than the 0.55% typical of PERC cells, helping sustain output over the full system lifetime. ### Is DualSun a reliable manufacturer and where are the FLASH series panels produced? DualSun is a French company founded in 2010 and headquartered in Marseille. FLASH series panels hold multiple certifications, including the PEP (Product Environmental Profile) certificate confirming a low carbon footprint, and they qualify under ESG reporting requirements. The manufacturer states that producing FLASH panels emits less CO2 than standard PV modules, and the panels are 94.7% recyclable through the PV Cycle organization. The European headquarters facilitates the enforcement of warranty rights. ### Will DualSun FLASH panels perform well under partial shading conditions, such as from chimneys or dormers? Yes. The use of half-cut cells means each cell is split in two, which limits the impact of shading on the overall panel output. Even if some cells fall under the shadow of a chimney or dormer, the remaining cell strings continue to operate unaffected. TOPCon technology further improves performance under diffuse light conditions, which is particularly relevant in Poland, where overcast skies predominate for a significant portion of the year. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dualsun-en-datasheet-flash-425-half-cut-glass-glass-topcon-c3912d56b363.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 | | [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 | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +75 W, cooler, +2.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +75 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/huasun-ds425-108m10tb-03 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.