--- title: "DAH Solar DHN-66Z16/DG-625W 625W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-66Z16/DG-625W 625W solar panel. Specs: 23.14% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-66z16-dg-625w" updated: 2026-09-11 --- # DAH Solar DHN-66Z16/DG-625W Solid all-round for its segment 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-66Z16/DG-625W - **Series:** DHN-66Z16/DG 585~625W - **Rated power:** 625 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) | 625 W | 620 W | Typical | | | Module efficiency | 23.14% | 22.80% | Typical | 1,509 | | Power density | 231.4 | 227.7 | Typical | 1,513 | | 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 | 23.14% | 22.80% | Typical | 1,509 | | Power density | 231.4 | 227.7 | Typical | 1,513 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 52.0 | 53.1 | Typical | 5,417 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 625 W - **Efficiency:** 23.14 % - **Voltage at Pmax (Vmp):** 41.50 V - **Current at Pmax (Imp):** 15.01 A - **Open-circuit voltage (Voc):** 50.00 V - **Short-circuit current (Isc):** 16.06 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 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.5 kg - **Area:** 2.70 m2 - **Power density:** 231.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 546 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1509 of 14005 | | Power density | 1513 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 5417 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23.14% Efficiency – Segment-Leading Performance** - A peak efficiency of 23.14% places this series at the top of its peer group — on par with Techwise Solar (23.14%) and Longi Hi-MO 7 (23.1%), and well above the Leapton LP182 (22.36%). In practical terms, this translates to a meaningfully smaller roof or ground footprint required to achieve the same installed capacity. - **Low Temperature Coefficient of –0.29%/°C** - A Pmax temperature coefficient of –0.29%/°C outperforms the PERC baseline (typically –0.35%/°C). Under Central European summer conditions — with module temperatures reaching approximately 70°C — this results in roughly 2–3% higher energy yield compared to PERC modules of equivalent STC power rating. - **30-Year Linear Power Warranty** - The manufacturer guarantees a minimum of 87.4% of rated power after 30 years of operation. Many competing Tier-1 modules — including older Leapton series and Longi Hi-MO 5/6 — offer warranties of up to 25 years at ~84.8–86%. The extended warranty horizon improves project IRR in financial models for utility-scale plants exceeding 10 MW. - **BNEF Tier 1 – Full Bankability Q1–Q4 2025** - DAH Solar has maintained BNEF Tier 1 status continuously across all quarters of 2025 (confirmed for Q1 and Q4 2025). This enables utility-scale project financing through banks and investment funds without additional manufacturer credit enhancement requirements. - **Bifacial Glass-Glass Construction with N-Type TOPCon Technology** - The combination of N-type TOPCon cells — with inherently low LID/LeTID — and a glass-glass construction eliminates moisture- and UV-induced degradation while reducing PID to virtually zero. Bifacial gain is estimated at 5–15% depending on ground albedo, providing a tangible energy bonus particularly in ground-mounted installations with light-colored gravel or white geomembrane surfaces. ## Cons - **Weight of 32.5 kg – Rooftop Load Constraint** - The glass-glass construction results in a module weight of 32.5 kg at dimensions of 2,382×1,134×30 mm. Comparable glass-backsheet modules — such as the Longi Hi-MO 7 in its single-glass configuration — typically weigh approximately 22–25 kg. On rooftops with limited structural capacity (older industrial buildings, lightweight steel structures), an additional structural engineering assessment is required, increasing overall project cost. ## About this series The DAH DHN-66Z16/DG 585-625W series is a range of modules designed to maximize energy yields on large roof areas and in PV farms, where every square meter counts, and stable operation under variable conditions is crucial. These modules utilize **N-type TOPCon cells**, which are known for their lower degradation over time and better performance at high temperatures and in low-light conditions - making energy production more predictable in the Polish climate. The **bifacial design** combined with **double glass** allows for the utilization of reflected light from the ground, while also increasing resistance to environmental factors. This is a significant advantage in areas where competing modules degrade more quickly due to moisture, UV radiation, or PID. Furthermore, manufacturing processes, such as **LECO (laser-assisted sintering)**, support high efficiency without compromising durability. This is a good choice for installers, investors, and designers seeking modules for **industrial, commercial, and utility applications**, with a focus on long-term reliability and high energy yields. ## Notable figures - At 23.1% efficiency, this panel is on par with typical \*\*TOPCon 600-650W\*\* modules - Power density of 231.4 W/m² packs 3.7 W/m² more into the same footprint vs \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface - In the top 11% for efficiency among all TOPCon panels ## Questions ### What warranty coverage applies to DAH Solar DHN-66Z16/DG 585–625W panels? The DHN-66Z16/DG series carries a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty — after 30 years, the module retains at least 87.4% of its nominal power rating. This represents one of the longest power warranty standards currently available on the market, directly enhancing investment security for commercial and utility-scale installations. ### Do DAH Solar DHN-66Z16/DG bifacial modules genuinely generate more energy than monofacial equivalents? Yes, the dual-sided design allows the rear surface of the module to capture light reflected from the ground (albedo effect). The actual energy gain depends on the ground surface type and mounting angle — on bright gravel or concrete surfaces, the yield improvement typically ranges from 5% to 15% compared to a monofacial equivalent. Combined with a dual-glass construction and TOPCon cells, the DHN-66Z16/DG series is particularly well-suited for ground-mounted solar farms and flat industrial rooftops. ### Will DAH Solar DHN-66Z16/DG 585–625W panels perform well in the Polish climate with its high number of overcast days? TOPCon N-type cells feature a power temperature coefficient of approximately -0.29%/°C, which is among the best in their class — the module loses less power during hot summer periods. TOPCon technology also delivers superior efficiency under diffuse, low-irradiance conditions typical of Polish autumn and winter seasons. This represents a direct performance advantage over older PERC-based modules in Central European climatic conditions. ### How much does a DAH Solar DHN-66Z16/DG panel weigh, and is a standard roof structure sufficient to support this series? The module weighs approximately 33.5 kg, with dimensions of 2382 × 1134 × 30 mm. Due to its dual-glass construction, it is heavier than conventional backsheet modules (typically 21–26 kg). A structural engineering assessment is recommended before installing on an existing building roof, particularly for larger-scale systems. For ground-mounted arrays and structurally robust industrial rooftops, the additional weight is generally not a limiting factor. ### How does TOPCon technology differ from the PERC cells used in older panels? PERC cells are P-type with a rear-side passivation layer, whereas TOPCon (Tunnel Oxide Passivated Contact) cells are N-type and incorporate an additional ultra-thin silicon oxide tunnel layer. The result is reduced charge carrier recombination, higher cell efficiency (up to 23.14% in this series), slower long-term degradation, and improved performance at elevated temperatures and low irradiance levels. For the end investor, this translates to more kWh generated from the same roof area over the entire operational lifetime of the system. ### Is DAH Solar a reputable manufacturer — is the brand recognized in the European market? DAH Solar is classified as a Tier 1 manufacturer according to the BloombergNEF bankability ranking, which reflects verified financial stability and production capacity to honor long-term warranty commitments. The company holds IEC and MCS certifications and actively supplies modules to European markets, including large utility-scale projects. For installers and investors, Tier 1 status is a key risk-mitigation factor when evaluating multi-year service contracts and project financing. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-66z16-dg-585-625w-28acb879c87e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +50 W, lighter, +1.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +45 W, lighter, +1.7 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +45 W, lighter, +1.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.7 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +45 W, cooler, +1.7 pp | | [DAH Solar DHN-66Z20/DG(BW)-585W](https://comparepv.com/panel/dah-dhn-66z20-dg-bw-585w) | 585 W | -40 W, -1.5 pp | | [DAH Solar DHN-590Z16/DG(BW)](https://comparepv.com/panel/dah-dhn-590z16-dg-bw) | 590 W | -35 W, -1.3 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +55 W, lighter, +2.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +75 W, cooler, +1.9 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +70 W, cooler, +1.8 pp | --- Source: https://comparepv.com/panel/dah-dhn-66z16-dg-625w 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.