--- title: "DAH Solar DHN-66Y18/DG-725 725W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-66Y18/DG-725 725W solar panel. Specs: 23.34% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-66y18-dg-725" updated: 2026-09-11 --- # DAH Solar DHN-66Y18/DG-725 Efficiency leader, no clear weak spot 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-66Y18/DG-725 - **Series:** DHN-66Y18/DG - **Rated power:** 725 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 700-750 W (420 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 725 W | 715 W | Strong - top 17% | | | Module efficiency | 23.34% | 23.00% | Strong - top 15% | 943 | | Power density | 233.4 | 230.2 | Strong - top 18% | 936 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 36.7 kg | 38.0 kg | Strong - top 19% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.34% | 23.00% | Strong - top 15% | 943 | | Power density | 233.4 | 230.2 | Strong - top 18% | 936 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 50.6 | 52.9 | Strong - top 19% | 4,067 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **23.34% module efficiency** - Top 15% of the TOPCon 700-750 W segment, against a median of 23.00%. - **233.4 watts per square metre** - Top 18% of the TOPCon 700-750 W segment, against a median of 230.2. - **50.6 kg per kWp** - Top 19% of the TOPCon 700-750 W segment, against a median of 52.9. - **Best for:** Commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 725 W - **Efficiency:** 23.34 % - **Voltage at Pmax (Vmp):** 41.00 V - **Current at Pmax (Imp):** 17.68 A - **Open-circuit voltage (Voc):** 48.60 V - **Short-circuit current (Isc):** 18.79 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:** 132 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 36.7 kg - **Area:** 3.11 m2 - **Power density:** 233.4 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:** 634 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 943 of 14005 | | Power density | 936 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 4067 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Patented Full Screen Technology** - The absence of a protruding front frame eliminates dust and debris accumulation along module edges. DAH Solar claims up to 15% reduction in soiling-related power losses per year compared to standard framed modules, which directly translates into higher annual energy yield without additional cleaning expenditure. - **N-type TOPCon – Low Degradation and Enhanced Low-Light Performance** - N-type TOPCon cells exhibit an annual degradation rate of ~0.43%/year (derived from the ≥87% power output warranty after 30 years), outperforming the typical ~0.55%/year of PERC cells. N-type technology also delivers a higher bifaciality factor and superior efficiency under diffuse irradiance conditions, which is particularly relevant in the Polish climate. - **Bifacial Dual Glass – Rear-Side Yield and Long-Term Durability** - A bifaciality factor of ~80% (±5%) enables an additional 5–25% energy gain from ground-reflected irradiance, depending on the installation's albedo. The glass-glass construction eliminates PID risk, provides resistance to moisture and UV degradation, and offers mechanical load resistance of up to 5,400 Pa (snow) / 2,400 Pa (wind) per manufacturer datasheets. - **30-Year Linear Power Warranty (≥87% Output)** - DAH Solar offers a 30-year linear power warranty with a minimum threshold of ≥87% of nominal output after 30 years, alongside a 15-year product warranty. This is comparable to the best offerings in the bifacial dual glass Tier-1 segment (Tongwei, TCL Zhonghuan), providing a solid foundation for project bankability. - **BNEF Tier 1 – Bankability Confirmed Quarterly** - DAH Solar has maintained BNEF Tier 1 status throughout all quarters of 2025 (Q1–Q4 2025 confirmed). This status is required by the majority of project finance institutions and insurance underwriters, facilitating financing for commercial and utility-scale PV projects. ## Cons - **High Module Weight – 39.5 kg** - The dual glass construction results in a module weight of 39.5 kg, approximately 5–7 kg more than comparable monofacial modules in the same power class (~32–34 kg). This necessitates roof load-bearing verification and may increase installation labor costs; the frameless front also reduces compatibility with some racking systems designed for standard aluminum-framed modules. ## About this series The DAH DHN-66Y18/DG photovoltaic panel series revolutionizes the approach to efficiency through the use of unique, patented **Full Screen** technology. The lack of a protruding frame at the edges allows water and sediment to flow off freely, which effectively eliminates the problem of dust and mud accumulation at the module boundaries. This innovative solution directly translates to higher energy yield, reducing power losses caused by dirt by up to 15 percent annually compared to traditional designs. The use of advanced **N-type TOPCon cells** ensures not only higher base efficiency but also significantly better performance in diffused light conditions and lower degradation over time. The robust **Bifacial Dual Glass** construction enables double-sided energy generation while maintaining the highest resistance to harsh weather conditions, making these modules an ideal choice for modern home installations and professional photovoltaic farms. Thanks to the **minimalist front frameless design**, the system requires significantly less frequent maintenance, which is a key advantage for investors who value time and money savings. Choosing this series is an investment in technology that realistically solves the problem of edge sediments, offering stable and high power production where standard solutions lose their efficiency. ## Notable figures - At 23.3% efficiency, this panel is on par with typical \*\*TOPCon 700-750W\*\* modules - At 233.4 W/m² power density, this panel generates 3.2 W/m² more per unit area than \*\*TOPCon 700-750W\*\* median (230.2 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 700-750W\*\* panels - At 36.7 kg, this panel is 1.3 kg lighter than \*\*TOPCon 700-750W\*\* median (38.0 kg) - easier handling during installation - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What is the maximum power output and efficiency of the DAH Solar DHN-66Y18/DG panel? The DHN-66Y18/DG series achieves a maximum power output of 725 Wp at a module efficiency of approximately 22.5%, placing it among the top-performing large-format modules currently available on the market. The architecture, based on 132 N-type TOPCon cells, enables high energy yield even under low-irradiance conditions, resulting in better annual production figures in the Polish climate compared to older PERC-based technologies. ### What is the patented Full Screen technology in the DHN-66Y18/DG series, and does it genuinely reduce soiling losses? The Full Screen technology eliminates the protruding front-edge frame of the module, allowing water, mud, and dust to drain freely rather than accumulating at the perimeter. DAH Solar states that the self-cleaning effect reduces power losses caused by soiling by up to 15 percent per year compared to conventional framed module designs. This translates into tangible financial benefits and a reduced need for manual cleaning, particularly on hard-to-access rooftops. ### What warranty does DAH Solar provide for the DHN-66Y18/DG series? DAH Solar offers a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty for this series. The manufacturer holds Tier 1 status, which reflects a stable financial position and a credible ability to honor warranty obligations over the course of decades. Prior to purchase, it is advisable to confirm whether the selected distributor in Poland provides local warranty support. ### Does the DAH Solar DHN-66Y18/DG perform well in winter and on overcast days typical of Poland? Yes. N-type TOPCon cells feature a low temperature coefficient of power at −0.29% per degree Celsius, which means reduced losses on hot days and better performance during cooler months. TOPCon technology also exhibits higher sensitivity to diffuse irradiance compared to P-type cells, which is a significant advantage in the Polish climate where overcast days account for a substantial share of annual solar exposure. ### Is the heavy DHN-66Y18/DG module, weighing approximately 39 kg, suitable for a typical single-family home? The DHN-66Y18/DG panel weighs approximately 39.5 kg with dimensions of 2,384 × 1,303 mm, which is typical for high-power glass-glass modules. A structural load-bearing assessment of the roof should be commissioned before installation, especially on older buildings. However, the large form factor simplifies installation on larger roof surfaces, as fewer modules are required to achieve the same system power output compared to standard 400–500 Wp panels. ### What are the benefits of bifacial energy generation in the DHN-66Y18/DG series, and when is it worth leveraging? A bifaciality factor of approximately 80 percent means the rear side of the module can generate up to 80 percent of the front-side power output by absorbing light reflected from the surface below. Real-world gains depend on the albedo of the ground beneath the array: light-colored gravel, a white membrane, or snow cover can increase annual energy production by several to over ten percent. For rooftop installations on dark roof tiles the effect is minimal, whereas on ground-mounted systems or flat roofs with a light-colored ballast layer, bifaciality measurably improves the overall system economics. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-66y18-dg-700-725w-bf49e5132220.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -45 W, lighter, +1.9 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -50 W, lighter, +1.7 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | -25 W, cooler, +1.7 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | -30 W, cooler, +1.6 pp | | [AIKO AIKO-A690-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a690-mae78dw) | 690 W | -35 W, cooler, +1.4 pp | | [AIKO AIKO-A685-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a685-mae78dw) | 685 W | -40 W, cooler, +1.2 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +35 W, cooler, +1.2 pp | | [AIKO AIKO-A680-MAH78Dw](https://comparepv.com/panel/aiko-aiko-a680-mah78dw) | 680 W | -45 W, cooler, +1.0 pp | | [DAH Solar DAS-DH132NC-695](https://comparepv.com/panel/dah-solar-das-dh132nc-695) | 695 W | -30 W, heavier, -0.9 pp | | [DAH Solar DHN-66Y18/DG-700](https://comparepv.com/panel/dah-dhn-66y18-dg-700) | 700 W | -25 W, -0.8 pp | | [DAH Solar DHN-66Y18/DG-705](https://comparepv.com/panel/dah-dhn-66y18-dg-705) | 705 W | -20 W, -0.6 pp | | [DAH Solar DHN-66Y18/DG-710](https://comparepv.com/panel/dah-dhn-66y18-dg-710) | 710 W | -15 W, -0.5 pp | | [DAH Solar DHN-66Y18/DG-715](https://comparepv.com/panel/dah-dhn-66y18-dg-715) | 715 W | -10 W, -0.3 pp | | [DAH Solar DHN-66Y18/DG-720](https://comparepv.com/panel/dah-dhn-66y18-dg-720) | 720 W | Very close match | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +80 W, heavier, +1.8 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +75 W, heavier, +1.6 pp | --- Source: https://comparepv.com/panel/dah-dhn-66y18-dg-725 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.