--- title: "DAH Solar DHN-66Z16/DG(BW)-605 605W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-66Z16/DG(BW)-605 605W solar panel. Specs: 22.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-66z16-dg-bw-605" updated: 2026-09-11 --- # DAH Solar DHN-66Z16/DG(BW)-605 Middle of its segment, modest efficiency 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-66Z16/DG(BW)-605 - **Series:** DHN-66Z16/DG(BW) - **Rated power:** 605 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 605 W | 620 W | Weak - bottom 15% | | | Module efficiency | 22.40% | 22.80% | Weak - bottom 23% | 4,774 | | Power density | 224.0 | 227.7 | Weak - bottom 23% | 4,780 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.5 kg | 32.7 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.40% | 22.80% | Weak - bottom 23% | 4,774 | | Power density | 224.0 | 227.7 | Weak - bottom 23% | 4,780 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.7 | 53.1 | Typical | 7,739 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **22.40% module efficiency** - Bottom 23% of the TOPCon 600-650 W segment, against a median of 22.80%. - **224.0 watts per square metre** - Bottom 23% of the TOPCon 600-650 W segment, against a median of 227.7. - **Best for:** Commercial, utility-scale and hot-climate. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 605 W - **Efficiency:** 22.40 % - **Voltage at Pmax (Vmp):** 40.70 V - **Current at Pmax (Imp):** 14.86 A - **Open-circuit voltage (Voc):** 48.00 V - **Short-circuit current (Isc):** 15.82 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:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.5 kg - **Area:** 2.70 m2 - **Power density:** 224.0 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:** 529 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4774 of 14005 | | Power density | 4780 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 7739 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Patented Full-Screen Technology – Measurable Yield Gain** - The frameless front surface effectively eliminates dust and water accumulation at module edges. DAH Solar reports a 6–15% generation increase under dusty conditions versus standard aluminum-framed panels. With approximately 4.5 GW of cumulative global shipments, the technology has been validated in real-world conditions, not just in the laboratory. - **Up to 23.14% Efficiency – Top of the Segment** - A peak efficiency of 23.14% places this series on par with direct peer comparables such as Longi Hi-MO 7 (23.1%) and Techwise Solar TOPCon (23.14%). Leapton LP182 reaches only 22.36%, giving DAH a tangible ~0.78 percentage-point advantage at an identical 182 mm cell format. - **N-Type TOPCon + Bifacial – Lower Degradation, Higher Yield** - N-type TOPCon cells are free from the LID (Light-Induced Degradation) effect characteristic of P-type PERC cells and exhibit a lower temperature coefficient (−0.29%/°C), translating into better performance during summer months. The bifacial Double Glass structure captures additional energy from reflected irradiance (bifacial factor up to 85%), realistically increasing annual yield by 5–15% depending on ground albedo. - **30-Year Power Warranty (>87.4%)** - The manufacturer guarantees retention of more than 87.4% of nominal power output after 30 years of operation. This is among the longest warranty standards in the segment — the Double Glass construction (glass–glass instead of glass–backsheet) directly underpins this warranty by eliminating the rear-laminate degradation of PVF/EVA typical of conventional modules. - **Confirmed Tier-1 BNEF Status (Q4 2025)** - DAH Solar maintains an uninterrupted Tier-1 ranking according to BloombergNEF, confirmed in both Q1 and Q4 2025 under tightened criteria (project threshold raised from 5 MW to 10 MW). The manufacturer's bankability reduces financing risk for installations funded by banks and investment funds. ## Cons - **32.5 kg Weight – Structural Requirements** - The Double Glass construction (2 mm + 2 mm) results in a module weight of approximately 32.5 kg, compared to the ~22–25 kg typical of glass-backsheet panels in the same format. At high roof-coverage densities, this may necessitate a structural engineering assessment or rafter reinforcement, adding to installation costs — particularly in older buildings. ## About this series The DAH DHN-66Z16/DG(BW) panel series is a breakthrough solution utilizing **patented Full-Screen technology**, which effectively eliminates the accumulation of water and dust on the module edges. Thanks to a unique design without traditional frames on the edges, these panels solve the common problem of energy losses resulting from accumulated dirt, which translates into a real increase in efficiency by up to several percent per year. The use of high-efficiency **N-Type TOPCon cells** ensures higher efficiency and significantly lower material degradation over time, guaranteeing stable profits for the investor for decades. The use of a **bifacial Double Glass structure** significantly increases mechanical resistance and ensures the modules perform excellently in harsh weather conditions while maintaining an aesthetic appearance. It is an ideal choice for installations on low-tilt roofs, where traditional panels require frequent cleaning and maintenance. Standing out from the competition, this model offers a unique combination of innovative engineering and functionality, providing **zero risk of the so-called edge shading effect**. It is a professional tool for investors focused on maximizing yields with minimal involvement in the maintenance of the photovoltaic system. ## Notable figures - Efficiency of 22.4% matches the \*\*TOPCon 600-650W\*\* median - At 224.0 W/m², this panel generates 3.7 W/m² less per unit area than \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - In the top 34% for efficiency among all TOPCon panels ## Questions ### What is the Full-Screen technology used in DAH Solar DHN-66Z16/DG(BW) panels, and does it actually reduce soiling losses? Full-Screen technology eliminates the traditional front frame from the module, allowing water and dust to drain freely off the glass edges rather than accumulating in the frame channel. According to manufacturer data, this removes 6–15% of energy losses caused by soiling and particulate buildup. This is a particularly significant advantage on low-tilt rooftop installations (below 15°), where conventional framed panels typically require frequent manual cleaning to maintain output. ### What warranty does the DAH Solar DHN-66Z16/DG(BW) series carry? The manufacturer provides a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. At the end of the 30-year period, the panel is guaranteed to retain at least 87.4% of its original nominal power. This is among the longest power warranties currently available in the market, making it a compelling choice for projects where long-term return on investment is a primary consideration. ### What is the real-world energy yield of the bifacial DAH DHN-66Z16/DG(BW) panel compared to a monofacial module? The DHN-66Z16/DG(BW) series features a dual-glass bifacial structure with a bifaciality factor of approximately 80–85%. On installations with high-albedo surfaces — such as light-colored gravel, TPO membranes, or snow cover — the rear side of the module can contribute an additional 5–25% of energy yield relative to a comparable monofacial module. The greatest bifacial gains are observed on flat rooftops and ground-mounted systems equipped with reflective or light-colored ground cover beneath the array. ### How does the DAH DHN-66Z16/DG(BW) panel perform in winter and on overcast days? The N-Type TOPCon cells used in this series have a power temperature coefficient of just -0.29%/°C, meaning reduced thermal losses during hot summer conditions and excellent performance on cold, clear winter days. N-Type cell architecture also exhibits significantly lower Light-Induced Degradation (LID) compared to standard P-Type cells, resulting in higher energy production across all seasons and better retention of rated output over the module's lifetime. ### What is the maximum power output of the DAH Solar DHN-66Z16/DG(BW), and is it compatible with standard inverters? The top power rating in this series is 625 Wp, with a module efficiency of up to 23.14%. The panel dimensions are 2382×1134×30 mm and the module weighs 32.5 kg. The electrical parameters are compatible with standard string inverters available on the European market. Before sizing an inverter, it is advisable to verify the open-circuit voltage (Voc) for the specific wattage variant selected, as the series spans models from 585 Wp to 625 Wp with correspondingly varying Voc values. ### Does the Double Glass frameless design of the DHN-66Z16/DG(BW) series require a specialized racking system? Yes. The absence of a front aluminum frame means the module must be clamped exclusively at the designated mid-clamp zones or using dedicated frameless module clamps that comply with DAH Solar's mounting specifications. Standard edge clamps designed for aluminum-framed panels are not suitable for this module. Most reputable racking system manufacturers — including K2 Systems and Mounting Systems — already offer compatible solutions specifically engineered for frameless dual-glass modules. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-66z16-dg-bw-585-625w-8ee8ea026a9f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +45 W, lighter, +2.8 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +40 W, lighter, +2.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -45 W, lighter, +2.4 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +35 W, lighter, +2.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -50 W, lighter, +2.2 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +30 W, lighter, +2.2 pp | | [DAH Solar DHN-66Z20/DG(BW)-585W](https://comparepv.com/panel/dah-dhn-66z20-dg-bw-585w) | 585 W | -20 W, -0.7 pp | | [DAH Solar DHN-590Z16/DG(BW)](https://comparepv.com/panel/dah-dhn-590z16-dg-bw) | 590 W | -15 W, -0.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +75 W, lighter, +2.8 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +70 W, lighter, +2.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +95 W, cooler, +2.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +90 W, cooler, +2.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +65 W, lighter, +2.4 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +65 W, lighter, +2.4 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +65 W, cooler, +2.4 pp | --- Source: https://comparepv.com/panel/dah-dhn-66z16-dg-bw-605 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.