--- title: "DAH Solar DHN-48Z16/DG(BW)-425 425W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-48Z16/DG(BW)-425 425W solar panel. Specs: 21.27% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-48z16-dg-bw-425" updated: 2026-09-11 --- # DAH Solar DHN-48Z16/DG(BW)-425 Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-48Z16/DG(BW)-425 - **Series:** DHN-48Z16/DG(BW) - **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 | 21.27% | 22.00% | Weak - bottom 10% | 8,849 | | Power density | 212.7 | 220.2 | Weak - bottom 13% | 8,733 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.9 kg | 22.0 kg | Weak - bottom 21% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.27% | 22.00% | Weak - bottom 10% | 8,849 | | Power density | 212.7 | 220.2 | Weak - bottom 13% | 8,733 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 56.2 | 51.4 | Weak - bottom 21% | 10,505 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.27% module efficiency** - Bottom 10% of the TOPCon 400-450 W segment, against a median of 22.00%. - **212.7 watts per square metre** - Bottom 13% of the TOPCon 400-450 W segment, against a median of 220.2. - **56.2 kg per kWp** - Bottom 21% of the TOPCon 400-450 W segment, against a median of 51.4. - **Best for:** Residential and commercial. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.27 % - **Voltage at Pmax (Vmp):** 29.60 V - **Current at Pmax (Imp):** 14.36 A - **Open-circuit voltage (Voc):** 35.00 V - **Short-circuit current (Isc):** 15.34 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 - **Bifacial gain:** 25.00 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.9 kg - **Area:** 2.00 m2 - **Power density:** 212.7 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 | 8849 of 14005 | | Power density | 8733 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 10505 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Low Temperature Coefficient — TOPCon Advantage** - N-type TOPCon cells exhibit a Pmax temperature coefficient of -0.29%/°C, compared to the typical -0.35 to -0.40%/°C of PERC technology. This translates into measurably higher energy yield during hot summer months, when cell temperatures routinely exceed 50–60°C. - **30-Year Linear Power Warranty** - The manufacturer guarantees ≥87.4% of nominal power output after 30 years, with degradation ≤0.4%/year beyond year one. The comparable Waaree ARKA offers the same peak power of 455 W but at only 20.93% efficiency and a standard 25-year power warranty, resulting in a significantly weaker long-term performance balance. - **Bifacial Double Glass — Additional Energy Generation** - The bifacial double-glass construction enables 5–25% additional energy generation from ground-reflected irradiance, depending on surface albedo. The rear glass layer eliminates the delamination risk inherent to glass-foil modules, effectively extending system service life beyond 30 years. - **22.77% Efficiency — On Par with Segment Leaders** - The 455 W variant achieves 22.77% efficiency, virtually identical to the Sunlike Solar SKT420~455M10-108D6 (22.80%) and IBC Solar LS-TA2 (22.80%), while offering a 5-year longer power warranty advantage (30 years vs. the competitors' standard 25 years). - **BNEF Tier 1 — Bankability Confirmed** - DAH Solar has maintained BNEF Tier 1 status continuously at least since Q1 2025 (confirmed through Q3 2025), enabling bank financing for commercial projects and reducing manufacturer residual risk for institutional investors and system insurers. ## Cons - **23.9 kg Weight — Roof Structure Loading** - The Double Glass construction (2+2 mm glass, 30 mm total thickness) results in a per-module weight of 23.9 kg — approximately 14–20% heavier than standard glass-foil modules in the same power class (~20–21 kg). For installations on older rooftops or lightweight steel structures, a structural load assessment by a licensed structural engineer is required. ## About this series The DAH DHN-48Z16/DG(BW) solar panel series redefines efficiency standards through the use of unique, patented **Full-Screen** technology. Unlike traditional modules, this design lacks a protruding frame on the edges, which prevents the accumulation of dust and water and allows them to flow freely off the glass surface. This solves one of the industry's biggest problems - a drop in efficiency caused by dirt at the edges - ensuring higher annual yields without the need for frequent cleaning of the installation. At the heart of these modules are advanced **N-type TOPCon** cells, which offer significantly higher efficiency in low-light conditions and minimal power degradation over the long term. The use of **Double Glass** technology provides the panels with extreme durability and resistance to external factors, making them an excellent choice for both modern single-family homes and demanding commercial installations. This series stands out from the competition with its double-sided capability, or **bifacial**, which allows it to generate additional energy from rays reflected off the ground. It is an ideal solution for investors who value innovations that realistically increase system profitability throughout its entire service life, eliminating energy losses resulting from traditional, restrictive frame construction. Choosing these modules is a guarantee of reliability and maximum utilization of the available roof area. ## Notable figures - At 21.3% efficiency, this panel is 0.7pp below the \*\*TOPCon 400-450W\*\* median of 22.0% - Power density of 212.7 W/m² is 7.5 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - needs more roof space - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - At 23.9 kg, this panel is 1.9 kg heavier than the \*\*TOPCon 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What is the Full-Screen technology in the DAH Solar DHN-48Z16/DG(BW) panels, and does it genuinely reduce soiling losses? Full-Screen technology eliminates the protruding aluminum frame along the panel edges. As a result, dust, leaves, and water do not accumulate at the glass perimeter but instead flow freely across the surface. In practice, this translates to lower performance losses caused by soiling — a particularly noticeable benefit in installations that are not cleaned regularly. DAH Solar has patented this solution as a direct response to one of the most common operational issues associated with conventional framed modules. ### What warranty do the DAH Solar DHN-48Z16/DG(BW) panels carry, and how much power will they retain after 30 years? The DHN-48Z16/DG(BW) series comes with a 25-year product warranty covering materials and workmanship, as well as a 30-year linear power output warranty. Annual degradation after the first year of operation is approximately 0.4%, meaning the panel retains more than 87% of its original nominal power of 455 Wp after 30 years. This represents one of the longest power output warranties currently available in the photovoltaic panel market. ### Are the DAH Solar DHN-48Z16/DG(BW) panels suitable for ground-mount or flat-roof installations? Yes. The Double Glass construction — tempered glass on both sides instead of a rear backsheet — makes these panels exceptionally resistant to moisture and condensation, which is critical in ground-mount systems and flat-roof installations where air circulation beneath the module is limited. Furthermore, the bifacial design means that installations over high-albedo surfaces such as gravel, concrete, or snow can generate several to over ten percent additional energy from the rear glass, improving the overall system's return on investment. ### Does the bifacial operation of the DHN-48Z16/DG(BW) panels deliver real gains under Polish climatic conditions? Yes, the bifacial effect yields measurable gains even in Poland. The DHN-48Z16/DG(BW) achieves a bifaciality factor of approximately 80%, which — in installations over a high-albedo surface — translates into several to over ten percent additional annual energy yield. The effect is most pronounced in ground-mount systems with adequate module clearance height and during winter months, when reflected irradiance from snow cover significantly boosts energy production from the rear side. ### What are N-type TOPCon cells, and why do DAH DHN-48Z16/DG(BW) panels degrade more slowly than older PERC modules? N-type TOPCon cells incorporate a tunnel oxide passivation layer that suppresses charge carrier recombination within the cell. In practice, this delivers a module efficiency of 22.77%, superior performance under low-irradiance conditions (early morning, late evening, and overcast skies), and an annual power degradation rate of only approximately 0.4% — roughly half that of PERC technology. Over a 30-year service life, this difference amounts to several additional megawatt-hours of energy generated from the same roof area. ### Is DAH Solar a reliable manufacturer, and are the DHN-48Z16/DG(BW) panels readily available in Poland? DAH Solar is recognized as a Tier 1 manufacturer according to industry rankings, confirming its financial and production stability. The DHN-48Z16/DG(BW) series, rated up to 455 Wp, is currently in production and available through Polish distributors and photovoltaic wholesalers. The manufacturer holds IEC certifications and provides warranty service across Europe — an important consideration for potential warranty claims over the 25-year product warranty period. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-48z16-dg-bw-425-455w-145940a00494.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +50 W, +2.7 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, +2.5 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, lighter, +2.5 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, +2.5 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, +2.5 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +2.5 pp | | [DAH Solar DHN-48Z16/DG(RR)-380W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-380w) | 380 W | -45 W, -2.2 pp | | [DAH Solar DHN-48Z16/DG(RR)-385W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-385w) | 385 W | -40 W, -2.0 pp | | [DAH Solar DHN-48Z16/DG(RR)-390W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-390w) | 390 W | -35 W, -1.8 pp | | [DAH Solar DHN-48Z16/DG(RR)-395W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-395w) | 395 W | -30 W, -1.5 pp | | [DAH Solar DHN-48Z16/DG(RR)-400W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-400w) | 400 W | -25 W, -1.2 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, cooler, +3.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +3.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +3.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/dah-dhn-48z16-dg-bw-425 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.