--- title: "DAH Solar DAS-DH120NA-490 490W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DAS-DH120NA-490 490W solar panel. Specs: 22.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-solar-das-dh120na-490" updated: 2026-09-11 --- # DAH Solar DAS-DH120NA-490 Middle of its segment, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DAS-DH120NA-490 - **Series:** DAS-DH120NA - **Rated power:** 490 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 490 W | 465 W | Strong - top 12% | | | Module efficiency | 22.70% | 22.52% | Typical | 3,307 | | Power density | 227.1 | 225.2 | Typical | 3,339 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 26.0 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.70% | 22.52% | Typical | 3,307 | | Power density | 227.1 | 225.2 | Typical | 3,339 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 53.1 | 52.2 | Typical | 6,818 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 490 W - **Efficiency:** 22.70 % - **Voltage at Pmax (Vmp):** 37.04 V - **Current at Pmax (Imp):** 13.23 A - **Open-circuit voltage (Voc):** 43.39 V - **Short-circuit current (Isc):** 14.01 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:** 120 - **Bifacial:** yes ### Physical - **Length:** 1903 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 26.0 kg - **Area:** 2.16 m2 - **Power density:** 227.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 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:** 428 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3307 of 14005 | | Power density | 3339 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 6818 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Patented Full Screen Technology** - The absence of a traditional frame ledge eliminates water and debris pooling at module edges — natural rainfall rinses dust from the entire panel surface. This is particularly significant at tilt angles below 15°, where conventionally framed modules may require maintenance several times per season; the manufacturer estimates a yield gain of several percent compared to standard framed designs. - **Up to 22.7% Efficiency — Top-Tier TOPCon Performance** - The peak efficiency of 22.7% matches or exceeds direct competitors, including Horay Solar HS 182-120 TC (22.6%) and Renesola RS4-490NX (22.71%). The only peer competitor with a clearly higher rating is Solar-Fabrik Mono S4 BC White (24%), which relies on the more costly back-contact technology and belongs to a separate price category. - **N-Type TOPCon + Bifacial Design** - N-type cells limit LID/LETID degradation to approximately 1% in the first year and 0.4% per year thereafter (vs. over 2% LID in legacy PERC), directly translating into higher cumulative energy yield over a 30-year operational lifetime. Bifacial collection of albedo-reflected irradiance delivers a real-world additional 5–25% generation depending on ground surface reflectivity (e.g., snow cover, light-colored gravel). - **30-Year Linear Power Warranty (≥87.4%)** - A linear power warranty extending to 30 years with an end-of-term floor of 87.4% goes beyond the typical 25-year terms offered by Tier-2 competitors, directly reducing installation LCOE and eliminating the risk of an abrupt warranty threshold breach in any given year of operation. - **BNEF Tier-1 for Four Consecutive Quarters of 2025** - DAS Solar maintained Bloomberg NEF Tier-1 status throughout all four quarters of 2025 (the fourth consecutive appearance on the list, confirmed by pv-magazine.com), confirming full bankability for debt-financed projects and acceptance by leading renewable energy project finance institutions. ## Cons - **15-Year Product Warranty** - The product warranty stands at 15 years, whereas DAS Solar standardly offers 25 years for its other N-type TOPCon series, and segment leaders such as Jinko Tiger Neo and LONGi Hi-MO 9 provide the same 25-year coverage. The shorter term may be a negative factor during due diligence for projects with a horizon exceeding 20 years and for institutional buyers requiring full alignment between the product warranty and the power output warranty. ## About this series The DAH DAS-DH120NA panel series is revolutionizing the PV market thanks to the use of patented **Full Screen** technology, which effectively eliminates the problem of water and dirt accumulation at the module edges. The absence of a traditional frame lip allows rain to naturally wash away dust, leading to a real increase in energy yields of up to several percent compared to standard designs. The use of modern **N-Type TOPCon** cells ensures the highest efficiency and excellent performance in low light conditions, which is crucial for local climate conditions. This product line is the ideal solution for investors seeking maintenance-free systems with minimal annual degradation. Thanks to a unique design **preventing the formation of hot-spots**, these panels offer a higher level of safety and longevity. DAS-DH120NA stands out from the competition with its **completely smooth front surface**, making it the best choice for low-tilt installations where standard modules require frequent servicing. Investing in this series is a guarantee of **maximizing energy self-consumption** while simultaneously reducing system maintenance costs, which significantly accelerates the return on the entire green energy investment. ## Notable figures - Efficiency of 22.7% matches the \*\*TOPCon 450-500W\*\* median - Power density of 227.1 W/m² matches the \*\*TOPCon 450-500W\*\* median - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - At 26.0 kg, this panel is 2.0 kg heavier than the \*\*TOPCon 450-500W\*\* median (24.0 kg) - more demanding for installation crews - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What is the Full Screen technology in DAH Solar DAS-DH120NA panels, and does it actually increase energy yield? Full Screen is a patented DAH Solar solution that eliminates the front-side frame rail from the module's face. As a result, rainwater flows freely across the entire glass surface, washing away dust and contaminants without accumulating at the edges. The manufacturer claims an energy yield increase of 6–15% compared to standard framed modules. In conditions where pollen and road dust can significantly reduce system performance, the self-cleaning effect translates into measurable savings by reducing the need for periodic panel washing. ### What warranty coverage applies to the DAH Solar DAS-DH120NA panels? The DAS-DH120NA series comes with a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. The power warranty guarantees that over three decades the panel retains the manufacturer-specified minimum percentage of its nominal power of 490 Wp. The characteristically low annual degradation rate of N-Type TOPCon cells means that in practice the panels operate significantly closer to their nominal output for far longer than older P-Type technology. ### Is the DAH Solar DAS-DH120NA suitable for roofs with a low tilt angle? Yes — the DAS-DH120NA is in fact a recommended choice for flat and low-pitch roofs. Conventional framed modules tend to accumulate water, silt, and debris along their lower edge, which is especially problematic at shallow roof slopes. Thanks to the frameless, threshold-free front surface of the Full Screen design, water and contaminants run off freely, eliminating the need for frequent maintenance. This is a significant advantage for installations on industrial buildings, garages, or inverted (warm) roof structures. ### What does it mean that the DAS-DH120NA is bifacial, and does bifaciality make sense in Poland? Bifaciality means the panel generates power from both its front and rear surfaces by capturing light reflected from the ground or surrounding environment. In Poland, the bifacial gain is most pronounced in winter, when snow reflects irradiance onto the module's rear side, and on light-colored gravel substrates or white flat-roof membranes. For typical rooftop installations the additional yield is in the low single-digit percentage range, while ground-mounted systems at adequate mounting height can achieve noticeably higher bifacial gains. ### Do the N-Type TOPCon cells in the DAS-DH120NA series perform better under overcast conditions than standard panels? Yes. N-Type TOPCon cells exhibit higher sensitivity to diffuse irradiance compared to mainstream P-Type PERC cells. In practice this translates into better performance on the cloudy, low-irradiance winter days that are typical of the Polish climate. The 490 Wp peak power combined with the high cell efficiency yields more kilowatt-hours on days with low solar insolation — a particularly important advantage for prosumers seeking to maximize self-consumption throughout the year. ### Are the DAH Solar DAS-DH120NA panels compatible with the inverters commonly available in Poland? Yes, the DAS-DH120NA series is compatible with all major inverters available on the Polish market, including Fronius, SMA, Huawei, Growatt, and Sofar. The panel operates within the standard voltage and current ranges typical of 490 Wp class modules, so string configuration follows the same process as with any other module in this power category. DAH Solar is a Tier-1 manufacturer, meaning its specifications are verified by independent audits and accepted by banks financing large-scale installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datasheet-DAS-DH120NA-xxx_465-490-2a6339e57836.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +2.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +1.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +1.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +1.8 pp | | [DAH Solar DHT-M60X10-430W](https://comparepv.com/panel/dah-solar-dht-m60x10-430w) | 430 W | -60 W, -2.8 pp, -5 yr warranty | | [DAH Solar DHT-M60X10-435W](https://comparepv.com/panel/dah-solar-dht-m60x10-435w) | 435 W | -55 W, -2.5 pp, -5 yr warranty | | [DAH Solar DHM-60X10/FS(BB)-440W](https://comparepv.com/panel/dah-dhm-60x10-fs-bb-440w) | 440 W | -50 W, -2.3 pp, -5 yr warranty | | [DAH Solar DHM-60X10/FS(BW)-445W](https://comparepv.com/panel/dah-dhm-60x10-fs-bw-445w) | 445 W | Hotter, -2.1 pp, -5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +70 W, cooler, +2.1 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +65 W, cooler, +1.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +60 W, lighter, +1.7 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +50 W, cooler, +1.7 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +50 W, cooler, +1.7 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +55 W, cooler, +1.6 pp | --- Source: https://comparepv.com/panel/dah-solar-das-dh120na-490 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.