--- title: "DAH Solar DHN-590Z16/DG(BW) 590W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-590Z16/DG(BW) 590W solar panel. Specs: 21.84% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-590z16-dg-bw" updated: 2026-09-11 --- # DAH Solar DHN-590Z16/DG(BW) Middle of its segment, modest efficiency 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-590Z16/DG(BW) - **Series:** DHN-66Z16/DG(BW) 585~625W - **Rated power:** 590 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 21.84% | 22.44% | Weak - bottom 15% | 6,985 | | Power density | 218.4 | 224.4 | Weak - bottom 15% | 6,954 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.5 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.84% | 22.44% | Weak - bottom 15% | 6,985 | | Power density | 218.4 | 224.4 | Weak - bottom 15% | 6,954 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.1 | 53.8 | Typical | 9,503 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.84% module efficiency** - Bottom 15% of the TOPCon 550-600 W segment, against a median of 22.44%. - **218.4 watts per square metre** - Bottom 15% of the TOPCon 550-600 W segment, against a median of 224.4. - **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):** 590 W - **Efficiency:** 21.84 % - **Voltage at Pmax (Vmp):** 39.70 V - **Current at Pmax (Imp):** 14.71 A - **Open-circuit voltage (Voc):** 47.20 V - **Short-circuit current (Isc):** 15.64 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:** 218.4 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:** 516 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6985 of 14005 | | Power density | 6954 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9503 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Premium-Grade Temperature Coefficient** - The Pmax temperature coefficient of -0.29%/°C is significantly better than typical PERC cells (-0.35%/°C) and on par with key competitors (LONGi Hi-MO 7: -0.29%/°C). In Polish climatic conditions, where summer module temperatures routinely reach 65–70°C, this difference translates into measurably higher annual energy yield. - **30-Year Power Warranty (87.4%)** - DAH guarantees at least 87.4% of nominal power output after 30 years of operation, with an annual degradation rate of approximately 0.4% following the first year. This represents one of the longest warranty horizons in the volume segment — a peer-comparable module, the Leapton LP182-M-78-NH, carries a standard 25-year warranty, not 30. - **Efficiency at the Top of the Market** - The top variant in the series achieves 23.14% module efficiency — identical to the Techwise Sun-Pursuit Plus TOPCon and higher than the Leapton LP182-M-78-NH (22.36%). This reduces the roof or ground area required to reach the target system capacity, which is a key advantage on constrained rooftops or sites. - **Dual-Glass + Bifacial Construction** - The glass-glass design (2 mm/2 mm) eliminates backsheet cracking risk and minimizes moisture ingress — critical for installations exposed to condensation or freeze-thaw cycles. The bifacial configuration, with a bifaciality factor of ~80%, enables meaningful rear-side energy harvest from ground-reflected irradiance, particularly on light-colored industrial floors or snow-covered surfaces. - **BNEF Tier 1 — Confirmed Bankability Q4 2025** - DAH Solar has maintained BloombergNEF Tier 1 status across consecutive quarters, including Q4 2025, under BNEF's tightened criteria requiring project financing of ≥10 MW. This directly supports access to project finance and lowers residual risk for both installers and investors. ## Cons - **32.5 kg Weight — Structural Constraints** - At 32.5 kg, the module is above average for the 132-cell format. Older roof structures on industrial halls or commercial buildings may require an additional structural engineering assessment prior to installation, adding cost and lead time that lighter competing modules would not necessitate. - **Smaller Production Volume and Service Network Than the Top-5** - Despite its Tier 1 status, DAH Solar falls outside the top five global manufacturers by shipment volume, which is dominated by LONGi, JA Solar, Trina Solar, Jinko Solar, and Canadian Solar. In the Polish market, this may translate into longer warranty claim processing times and a more limited local service footprint compared to the market leaders. ## About this series The DAH DHN-66Z16/DG(BW) 585-625W series is designed to maximize energy yield on large mounting areas - without compromising on durability. These are **bifacial** modules that can effectively utilize reflected light from the ground, making it easier to increase energy production in real-world conditions where every additional percentage of yield matters. A key advantage of this series is the **N-type TOPCon technology** - which ensures stable performance over time, good efficiency in low-light conditions, and better performance at high temperatures. The **dual glass** construction enhances resistance to moisture, UV radiation, and corrosive agents, which is particularly important in installations exposed to harsh environments. The use of **LECO** technology supports more efficient current flow in the module, leading to better efficiency without the need for "marketing hype." This is a good choice for PV farms, building roofs, and commercial projects where reliability, long-term performance, and predictable yield are important. ## Notable figures - Module efficiency of 21.8% is 0.6pp below average for \*\*TOPCon 550-600W\*\* panels (median: 22.4%) - At 218.4 W/m², this panel generates 6.0 W/m² less per unit area than \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 550-600W\*\* panels - At 32.5 kg (1.3 kg above \*\*TOPCon 550-600W\*\* median of 31.2 kg), requires checking roof load capacity - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What warranty does the DAH Solar DHN-66Z16/DG(BW) series carry and what does it cover? The DHN-66Z16/DG(BW) series comes with a 15-year product warranty covering material and workmanship defects, as well as a 30-year linear power output warranty. After 30 years, the manufacturer guarantees that modules will retain at least 87.4% of their nominal power. This is one of the longest power warranty standards available on the market, making it particularly significant for commercial installations and utility-scale PV farms with extended return-on-investment horizons. ### Do the DHN-66Z16/DG(BW) modules genuinely produce more energy thanks to bifacial technology, and by how much? Yes, modules in this series are bifacial with a bifaciality factor of approximately 80%. This means the rear glass captures light reflected from the ground surface and can contribute up to several percentage points of additional energy yield compared to a standard monofacial module. The actual gain depends on the albedo of the surface beneath: white gravel, light-colored concrete, or snow deliver a noticeably higher bifacial gain than dark soil or black roofing membrane. ### What is TOPCon cell technology in the DAH Solar DHN-66Z16/DG(BW) series and how does it differ from the widely used PERC? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture featuring an additional passivation layer that reduces electron recombination at the contact interface. In practice, this translates to higher module efficiency (up to 23.14% for this series), improved performance under overcast skies and low-irradiance conditions, and a lower temperature coefficient of -0.29%/°C. PERC cells are P-type and exhibit a steeper power loss at elevated temperatures, which measurably reduces energy output during hot weather. ### How much does the DAH Solar DHN-66Z16/DG(BW) 625W panel weigh and can a typical roof support it? The module weighs approximately 32.5 kg and has dimensions of 2382 × 1134 × 30 mm. This is a direct result of the dual-glass construction, which is heavier than standard backsheet modules. Before mounting on a residential or industrial building roof, a structural engineering assessment is advisable — especially for older structures. For ground-mounted systems and steel-framed utility-scale PV farms, the weight does not present a significant constraint. ### What types of installations is the DHN-66Z16/DG(BW) 585–625W series best suited for? This series is designed primarily with large-scale applications in mind: utility-scale PV farms, warehouse and industrial rooftop systems, and commercial projects. The high per-module power output (up to 625 Wp), combined with a corrosion- and moisture-resistant dual-glass enclosure and a long power output warranty, makes it the right choice wherever reliability and predictable long-term yield take priority over minimizing module weight. ### Does the dual-glass construction of the DAH DHN-66Z16/DG(BW) series genuinely improve durability, and is the module suitable for harsh weather conditions? Yes, the dual-glass design eliminates the backsheet, which is the most common failure point in conventional modules due to moisture ingress and UV degradation. Both glass panes are 2 mm thick, providing high resistance to mechanical stress, thermal gradients, and aggressive environments such as coastal areas, industrial zones, and locations with large diurnal temperature swings. Modules in this series carry TÜV and IEC certifications confirming compliance with applicable snow load and wind load standards. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-66z16-dg-bw-585-625w-8ee8ea026a9f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -30 W, lighter, +3.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, lighter, +3.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -35 W, lighter, +2.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, lighter, +2.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +2.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, 16 kg lighter, +2.6 pp | | [DAH Solar DHN-66Z20/DG(BW)-585W](https://comparepv.com/panel/dah-dhn-66z20-dg-bw-585w) | 585 W | Very close match | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +90 W, lighter, +3.4 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +85 W, lighter, +3.2 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +110 W, cooler, +3.2 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +105 W, cooler, +3.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +80 W, lighter, +3.0 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +80 W, lighter, +3.0 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/dah-dhn-590z16-dg-bw 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.