--- title: "DAH Solar DHN-48Z20/DG-435 435W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-48Z20/DG-435 435W solar panel. Specs: 21.77% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-48z20-dg-435" updated: 2026-09-11 --- # DAH Solar DHN-48Z20/DG-435 Solid all-round for its segment 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-48Z20/DG-435 - **Series:** DHN-48Z20/DG - **Rated power:** 435 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) | 435 W | 435 W | Typical | | | Module efficiency | 21.77% | 22.00% | Typical | 7,233 | | Power density | 217.7 | 220.2 | Typical | 7,066 | | 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 | 21.77% | 22.00% | Typical | 7,233 | | Power density | 217.7 | 220.2 | Typical | 7,066 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 54.9 | 51.4 | Typical | 9,316 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 435 W - **Efficiency:** 21.77 % - **Voltage at Pmax (Vmp):** 30.00 V - **Current at Pmax (Imp):** 14.50 A - **Open-circuit voltage (Voc):** 35.40 V - **Short-circuit current (Isc):** 15.46 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:** 217.7 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:** 380 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7233 of 14005 | | Power density | 7066 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9316 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Patented Full Screen Technology** - The frameless front eliminates the edge-accumulation effect of dust and deposits — DAH Solar claims 6–15% higher energy yield compared to conventional framed modules without additional maintenance. The patent protects the uniqueness of the solution in the market and is a direct response to real-world efficiency losses caused by edge soiling. - **Low Degradation of N-type TOPCon Cells** - Cells exhibit a maximum degradation of 1% in Year 1, followed by ≤0.4%/year, guaranteeing ≥87.4% of rated power after 30 years. The Pmax temperature coefficient of -0.29%/°C compares favorably to the typical -0.34%/°C for PERC, translating into measurably higher yield during hot summer conditions. - **30-Year Linear Power Warranty** - The manufacturer guarantees output power for 30 years with clearly defined thresholds (≥87.4% after 30 years), while the peer-comparable Waaree ARKA offers a standard 25-year warranty. The extended warranty directly reduces investment risk when modeling project NPV and IRR, and facilitates project financing. - **Bifacial Glass-Glass Construction ~80%** - A bifaciality of ~80% enables absorption of irradiance reflected from the ground surface, yielding a real additional output gain of approximately 3–8% per year under local conditions (winter snow cover, light-colored membranes, white gravel). The glass-glass construction replaces the backsheet, improving mechanical resilience and eliminating the risk of delamination. - **BNEF Tier-1 Bankable (Q1–Q3 2025)** - DAH Solar appears on the BNEF Tier-1 list continuously in Q1 and Q3 2025, facilitating project financing with lenders, acceptance by insurers, and compliance with due diligence requirements for utility-scale projects. ## Cons - **Requirement for Dedicated Mounting Clamps** - The frameless Full Screen design is incompatible with standard framed-module clamps (e.g., Schletter, K2 Systems). DAH Solar has certified a dedicated ARaymond PowAR Snap® S+ / PowAR Slot mounting system, which may limit the choice of BoS suppliers and requires verification of certified accessory availability with the specific installation contractor. ## About this series DAH DHN-48Z20/DG panels are revolutionizing the market thanks to the patented **Full Screen** design, which eliminates the problem of sediment buildup on the edges of the module. The absence of a protruding frame allows water to freely wash away dust and dirt, which directly translates into higher energy yields without the need for frequent maintenance. The use of **N-type TOPCon** cells guarantees excellent efficiency even in low light conditions and significantly lower power degradation over time. Thanks to **Double Glass** technology, the modules are characterized by exceptional mechanical resistance and a longer lifespan, making them an ideal choice for demanding rooftop and ground-mounted installations. The use of **bifaciality** allows for additional absorption of reflected rays, which optimizes system performance in diverse terrain. This series is dedicated to investors looking for maintenance-free solutions that effectively solve the problem of efficiency drops caused by soiling. Compared to the competition, the DHN-48Z20/DG model stands out with its unique combination of **compact size** and maximum surface efficiency, facilitating installation on roofs with complex geometry. It is a professional tool for achieving the highest return on investment in the Polish climate. ## Notable figures - Efficiency of 21.8% matches the \*\*TOPCon 400-450W\*\* median - At 217.7 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - 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 - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What warranty is provided for DAH Solar DHN-48Z20/DG panels? The DHN-48Z20/DG series comes with a 25-year product warranty covering physical defects and workmanship. In addition, the manufacturer provides a 30-year linear power output warranty, guaranteeing that after three decades of operation the module retains at least 87.4% of its original rated power. This is one of the longest power warranties available on the market and is a material factor when calculating return on investment. ### What is Full Screen technology in the DHN-48Z20/DG panels and why does it matter? Full Screen is a proprietary DAH Solar structural design that eliminates the protruding aluminum frame around the module's perimeter. As a result, rainwater can freely wash dust and bird droppings from the entire panel surface without deposits accumulating along the edges. In practice, this translates into higher annual energy yields and less frequent cleaning of the installation — a particularly valuable feature on hard-to-access rooftops. ### Are DAH Solar DHN-48Z20/DG panels suitable for pitched roof installations? Yes, the DHN-48Z20/DG series is well suited to standard rooftop installations. Module dimensions are 1762 × 1134 × 30 mm and the weight is approximately 23.9 kg, both within typical structural load requirements for residential roofs. The Double Glass construction provides strong resistance to snow and wind loads. The compact width also simplifies installation on roofs with complex geometry or dormers. ### How do DHN-48Z20/DG panels perform in winter and under overcast conditions? The N-type TOPCon technology used in the DHN-48Z20/DG series features a temperature coefficient of Pmax of only −0.29%/°C, which is superior to that of older PERC cells and results in lower power losses on hot days. Under overcast skies and low-irradiance conditions, N-type cells generate more energy than standard modules, which leads to better performance in the Polish climate for a significant portion of the year. ### Does the bifacial design of the DHN-48Z20/DG panels offer any benefit on a residential roof? Bifacial technology works by capturing albedo light reflected from the ground surface through the rear side of the module. On a typical pitched roof, the additional yield from bifaciality is modest, because there is no reflective surface directly behind the panel. The technology delivers the most pronounced benefits in ground-mount installations over high-albedo surfaces or in configurations with an appropriate tilt angle. When selecting the DHN-48Z20/DG series for a rooftop application, the primary advantages to consider are the Double Glass construction and the Full Screen design. ### Is DAH Solar a reputable manufacturer and are DHN-48Z20/DG panels available in Poland? DAH Solar holds Tier 1 status according to the Bloomberg NEF classification, confirming the company's financial stability and manufacturing quality. Headquartered in China, DAH Solar ranks among the world's leading PV module manufacturers. The DHN-48Z20/DG series is in active production and available through Polish distributors. When purchasing, it is advisable to verify the location of the nearest service center in Poland or the EU to ensure that warranty claims can be processed without unnecessary administrative burden. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-48z20-dg-425-455w-b54e5ade4459.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +50 W, lighter, +2.5 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +50 W, cooler, +2.5 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +50 W, cooler, +2.5 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 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 | -55 W, -2.8 pp | | [DAH Solar DHN-48Z16/DG(RR)-385W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-385w) | 385 W | -50 W, -2.5 pp | | [DAH Solar DHN-48Z16/DG(RR)-390W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-390w) | 390 W | -45 W, -2.2 pp | | [DAH Solar DHN-48Z16/DG(RR)-395W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-395w) | 395 W | -40 W, -2.0 pp | | [DAH Solar DHN-48Z16/DG(RR)-400W](https://comparepv.com/panel/dah-dhn-48z16-dg-rr-400w) | 400 W | -35 W, -1.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +75 W, cooler, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +60 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +70 W, cooler, +2.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +55 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +65 W, cooler, +2.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +65 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/dah-dhn-48z20-dg-435 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.