--- title: "DAH Solar DHN-48Z20/DG-430W 430W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-48Z20/DG-430W 430W solar panel. Specs: 21.52% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-48z20-dg-430w" updated: 2026-09-11 --- # DAH Solar DHN-48Z20/DG-430W Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-48Z20/DG-430W - **Series:** DHN-48Z20/DG (425–455W) - **Rated power:** 430 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) | 430 W | 435 W | Typical | | | Module efficiency | 21.52% | 22.00% | Weak - bottom 23% | 7,853 | | Power density | 215.2 | 220.2 | Weak - bottom 23% | 7,816 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.9 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.52% | 22.00% | Weak - bottom 23% | 7,853 | | Power density | 215.2 | 220.2 | Weak - bottom 23% | 7,816 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.6 | 51.4 | Typical | 9,974 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.52% module efficiency** - Bottom 23% of the TOPCon 400-450 W segment, against a median of 22.00%. - **215.2 watts per square metre** - Bottom 23% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential and commercial. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 430 W - **Efficiency:** 21.52 % - **Voltage at Pmax (Vmp):** 29.80 V - **Current at Pmax (Imp):** 14.43 A - **Open-circuit voltage (Voc):** 35.20 V - **Short-circuit current (Isc):** 15.40 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 96 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.9 kg - **Area:** 2.00 m2 - **Power density:** 215.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 376 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7853 of 14005 | | Power density | 7816 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9974 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon – Degradation ≤0.4%/year** - The datasheet confirms 1% degradation in the first year and ≤0.4%/year linear degradation in subsequent years. This represents approximately 20–25% slower power loss than typical PERC modules (0.5–0.55%/year), which over a 30-year horizon translates into several percentage points of higher cumulative energy yield. - **30-Year Linear Power Warranty** - The manufacturer guarantees power output for 30 years — five years longer than the standard 25-year warranty offered by comparable products such as the Waaree ARKA SERIES in the same power class. The extended warranty simplifies project bankability assessments and LCOE calculations for commercial installations and utility-scale PV farms. - **Efficiency Up to 22.77% – Among Segment Leaders** - The top variant in the series achieves 22.77%, placing it virtually on par with leading competitors in its class: Sunlike Solar SKT420–455M10-108D6 (22.8%) and IBC Solar LS-TA2 (22.8%), and significantly above the Waaree ARKA (20.93%). High module efficiency is particularly critical where rooftop area is constrained. - **Bifacial Glass-Glass – Durability and Additional Yield** - The dual-glass construction eliminates the risk of moisture ingress through the backsheet and reduces PID degradation. For ground-mounted systems and carports with light-colored surfaces, the bifacial effect can increase annual energy yield by 5–15% compared to monofacial modules, with no additional hardware cost. - **DAH Solar BNEF Tier 1 (Confirmed Q1–Q3 2025)** - DAH Solar has appeared continuously on the BNEF Tier 1 list since at least Q1 2025, confirming the manufacturer's financial stability and facilitating project financing from lending institutions. Founded in 2009, the company brings over 15 years of manufacturing experience. ## Cons - **Higher Weight – Glass-Glass vs. Glass-Backsheet** - Glass-glass modules typically weigh 25–28 kg, approximately 20–25% more than their glass-backsheet counterparts (21–23 kg). For retrofits on older rooftops, a structural assessment of the load-bearing construction may be required, adding cost and extending the project timeline. ## About this series The DAH DHN-48Z20/DG (425-455W) series are glass-glass type modules designed for stable energy production over many seasons, even in less ideal mounting conditions. The use of **N-type TOPCon** technology helps to minimize typical power losses over time and improves performance under weaker sunlight, which is important in the Polish climate. The **bifacial** design further allows for the utilization of reflected light from the ground - a real advantage on roofs with light membranes, carports, and ground-mounted installations. The **double-glass** construction also increases resistance to moisture, stress, and material degradation over the long term. In practice, this means a lower risk of microcracks, greater predictability in performance, and more reliable operation. The series also features **long, linear power warranty**, making it easier to plan the profitability of the investment. This is a good choice for homes, businesses, and PV farms where durability, consistent performance, and high module reliability are important. ## Notable figures - Efficiency of 21.5% matches the \*\*TOPCon 400-450W\*\* median - At 215.2 W/m², this panel generates 5.0 W/m² less per unit area than \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - At 23.9 kg (1.9 kg above \*\*TOPCon 400-450W\*\* median of 22.0 kg), requires checking roof load capacity - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What warranty does the DAH Solar DHN-48Z20/DG series carry and what does it cover? The DHN-48Z20/DG series comes with a 25-year product warranty covering material and workmanship defects, along with an industry-leading 30-year linear power output warranty. In practice, this means the manufacturer guarantees predictable, minimal performance degradation over three decades — making it significantly easier to calculate investment returns and negotiate financing terms. ### Are the DAH Solar DHN-48Z20/DG (455W) modules suitable for pitched roof installation in Poland? Yes, the DHN-48Z20/DG series is well suited for typical pitched roof installations. The bifacial glass-glass construction increases module rigidity and resistance to mechanical stress, while the N-type TOPCon cell technology improves energy yield under low-irradiance and diffuse light conditions — common during autumn and winter months in Poland. It is advisable to verify roof load-bearing capacity, as the dual-glass design adds slightly more weight compared to standard framed modules with a backsheet. ### What are the advantages of bifacial technology in the DHN-48Z20/DG series and when does it genuinely pay off? Bifacial cells allow modules to harvest light reflected from the ground surface through the rear side of the panel. Real-world bifacial gains typically range from 5–15% in additional energy yield and are highest when modules are installed over a light-colored roofing membrane, white gravel, or concrete in ground-mount systems, as well as on carports with open space beneath the array. On a dark roof with negligible albedo, the bifacial effect is minimal. ### How does the TOPCon technology used in the DHN-48Z20/DG differ from older PERC cells? N-type TOPCon cells feature a lower annual degradation rate (approximately 0.4% vs. 0.55% for PERC), perform better at elevated temperatures, and maintain higher output under low-light conditions. In the DHN-48Z20/DG series, this translates into higher cumulative energy yield over the module's entire service life, as well as a significantly reduced risk of LID (Light Induced Degradation) — the initial power loss that occurs upon first exposure to sunlight. ### Does the glass-glass construction of the DAH Solar DHN-48Z20/DG series increase module durability? Yes, replacing the conventional backsheet with a second glass pane substantially reduces moisture ingress into the laminate, thereby lowering the risk of delamination, cell corrosion, and microcracks over the long term. Glass-glass modules are recommended wherever panels are subject to significant temperature cycling, high humidity, or chemically aggressive environments — such as coastal installations or sites near industrial facilities. ### Is DAH Solar a reliable manufacturer and does the DHN-48Z20/DG series hold the necessary certifications? DAH Solar is classified as a Tier 1 manufacturer according to industry rankings (Bloomberg NEF), confirming its financial stability and consistent production quality. The DHN-48Z20/DG series modules carry IEC 61215 and IEC 61730 certifications, which are required for the legal sale and installation of PV modules within the European Union. This is particularly important when applying for subsidies under programs such as the Polish Mój Prąd scheme. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-48z20-dg-425-455w-b54e5ade4459.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A480-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a480-mah54mw) | 480 W | +50 W, cooler, +2.6 pp | | [Gokin GK-5-54HG-480M](https://comparepv.com/panel/gokin-gk-5-54hg-480m) | 480 W | +50 W, cooler, +2.6 pp | | [Jinko Solar JKM480N-48QL6-DB-F2-EU](https://comparepv.com/panel/jinko-solar-jkm480n-48ql6-db-f2-eu) | 480 W | +50 W, cooler, +2.5 pp | | [Gamko New Energy GKA96N-PRO-480W](https://comparepv.com/panel/gamko-new-energy-gka96n-pro-480w) | 480 W | +50 W, lighter, +2.5 pp | | [DAH Solar DHN-48Z16/DG(RR)-380W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-380w) | 380 W | -50 W, -2.5 pp | | [DAH Solar DHN-48Z16/DG(RR)-385W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-385w) | 385 W | -45 W, -2.2 pp | | [DAH Solar DHN-48Z16/DG(RR)-390W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-390w) | 390 W | -40 W, -2.0 pp | | [DAH Solar DHN-48Z16/DG(RR)-395W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-395w) | 395 W | -35 W, -1.8 pp | | [DAH Solar DHN-48Z16/DG(RR)-400W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-400w) | 400 W | -30 W, -1.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +80 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +65 W, cooler, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +75 W, cooler, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +60 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +70 W, cooler, +3.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +70 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/dah-dhn-48z20-dg-430w 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.