--- title: "DAH Solar DHN-66Z20/DG(BW)-610 610W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-66Z20/DG(BW)-610 610W solar panel. Specs: 22.58% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-66z20-dg-bw-610" updated: 2026-09-11 --- # DAH Solar DHN-66Z20/DG(BW)-610 Solid all-round for its segment 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-66Z20/DG(BW)-610 - **Series:** DHN-66Z20/DG(BW) - **Rated power:** 610 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) | 610 W | 620 W | Typical | | | Module efficiency | 22.58% | 22.80% | Typical | 3,828 | | Power density | 225.8 | 227.7 | Typical | 3,729 | | 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 | 22.58% | 22.80% | Typical | 3,828 | | Power density | 225.8 | 227.7 | Typical | 3,729 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.3 | 53.1 | Typical | 7,135 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential, commercial and utility-scale. ## Specification ### Electrical - **Rated power (Pmax):** 610 W - **Efficiency:** 22.58 % - **Voltage at Pmax (Vmp):** 40.90 V - **Current at Pmax (Imp):** 14.91 A - **Open-circuit voltage (Voc):** 48.20 V - **Short-circuit current (Isc):** 15.88 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:** 225.8 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:** 533 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3828 of 14005 | | Power density | 3729 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 7135 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23.14% Efficiency – Top Tier in Its Class** - Peak efficiency of 23.14% (625 Wp variant) places the series on par with the Techwise Solar Sun-Pursuit Plus TOPCon (23.14%) and ahead of the LONGi Hi-MO 7 (23.1%), with a clear margin over the Leapton LP182 (22.36%). The wide power range of 585–625 Wp across 9 variants enables precise system sizing without wasting usable roof area. - **Full-Screen – Patented Elimination of Edge-Soiling Losses** - The frameless front surface prevents accumulation of dust, water, and moss at the module edge — a critical concern for installations at tilt angles below 15°. DAH Solar reports cumulative Full-Screen shipments exceeding 4.5 GW across global markets, confirming field-proven technology maturity. - **N-Type TOPCon + Bifacial Design: Lower Degradation, Higher Yield** - N-Type TOPCon cells exhibit an annual degradation rate of ~0.4% (vs. ~0.55% for PERC) and are free from light-induced degradation (LID), translating into meaningfully higher cumulative energy yield over a 30-year service life. Bifacial gain (typically +5–15% rear-side energy contribution depending on ground albedo) further improves system economics on light-colored roofing surfaces or gravel ballast. - **30-Year Linear Power Warranty + BNEF Tier 1** - DAH Solar has maintained BNEF Tier 1 status continuously since 2024 (confirmed Q1–Q4 2025 and Q1 2026), a prerequisite imposed by financial institutions for bankable PV project financing. The 30-year linear power warranty represents the maximum offered in the dual-glass TOPCon segment. - **TÜV-Certified Mechanical Resistance: 5400/2400 Pa** - TÜV testing confirms a front-side load rating of 5400 Pa and a rear-side rating of 2400 Pa — identical to the benchmark set by premium framed modules. The dual-glass construction additionally provides superior UV and moisture resistance compared to conventional polymer backsheets, a particularly relevant advantage in the Polish climate. ## Cons - **Weight ~32.5 kg – Approximately 25% Heavier Than Framed Equivalents** - The frameless dual-glass construction weighs approximately 32.5 kg, compared to ~25–26 kg for framed modules of comparable power output (e.g., LONGi Hi-MO 7 625M). A per-panel weight difference of ~6–7 kg translates to roughly 130 kg of additional roof load for a 20-module array, and increases the complexity of rooftop installation logistics. - **Requires Dedicated Dual-Glass (DG) Clamps** - The Full-Screen frameless design is incompatible with standard mid- and end-clamps used for framed modules. Installation requires specialized dual-glass clamps (DG-clamps, e.g., Schletter or K2 Systems), which are not included in typical racking kits available through Polish distributors. This may increase BoS costs by 5–15% and necessitates compatibility verification with the mounting structure prior to project award. ## About this series The DAH DHN-66Z20/DG(BW) series redefines performance standards through the use of patented **Full-Screen** technology. Unlike traditional modules, these panels lack a protruding frame at the edges, which completely eliminates the problem of water accumulation and dust or dirt deposits. This solves the key problem of power drops caused by soiling, which is particularly important at low roof tilt angles where traditional solutions often fail. The use of advanced **N-Type TOPCon** cells ensures significantly higher efficiency and better performance in low-light conditions, translating into stable and high energy yields throughout the year. The durable **Dual Glass** construction combined with bifaciality makes the modules extremely resistant to extreme weather conditions and capable of generating additional energy from reflected light. This is an ideal solution for demanding investors seeking maximum self-consumption and minimal system maintenance costs. This series stands out from the competition due to the **absence of losses resulting from edge soiling**, making it unrivaled in residential installations and commercial projects. By choosing these modern modules, you gain a guarantee of longevity and higher investment profitability thanks to **minimal annual degradation** and high resistance to the PID effect. ## Notable figures - Efficiency of 22.6% matches the \*\*TOPCon 600-650W\*\* median - Power density of 225.8 W/m² matches the \*\*TOPCon 600-650W\*\* median - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - #3828 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What is the Full-Screen technology in the DAH Solar DHN-66Z20/DG(BW) panels and why does it matter? Full-Screen technology means there is no protruding frame along the module edges. In conventional framed panels, the frame traps water and dust, causing power output losses of 6–15%. In the DHN-66Z20/DG(BW) series, soiling drains freely from the glass surface, which is particularly important on low-pitch roofs — below 10–15 degrees — where contaminants accumulate most rapidly. The practical result is higher energy yield without the need for additional cleaning cycles. ### How much energy does the DAH Solar DHN-66Z20/DG(BW) panel generate from the rear side through bifacial technology? The DHN-66Z20/DG(BW) series achieves a bifaciality factor of approximately 85%, meaning the rear glass can contribute up to 5–25% additional power relative to the nominal 625 Wp rating, depending on ground albedo. Light-colored facades, white roofing membranes, or gravel ballast significantly increase reflected irradiance and therefore real-world annual yield. The dual-glass construction protects the cells on both sides, extending service life in demanding environmental conditions. ### What warranties apply to the DAH Solar DHN-66Z20/DG(BW) panels — product warranty and power output guarantee? DAH Solar provides a 15-year product warranty covering manufacturing defects and material failures, along with a 30-year linear power output guarantee. Thanks to N-Type TOPCon cell technology, annual degradation is exceptionally low — the manufacturer declares minimal power loss throughout the entire operational lifetime, as well as high resistance to the PID (Potential Induced Degradation) effect, which accelerates aging in conventional P-Type cells. ### Do the DAH Solar DHN-66Z20/DG(BW) panels perform well in winter and under overcast conditions? Yes. N-Type TOPCon cells exhibit superior low-light responsiveness — under diffuse irradiance, overcast skies, fog, and low sun angles — compared to standard P-Type modules. Their low temperature coefficient also means that on cold, sunny winter days the panels operate more efficiently than during summer heat. For installations in Poland this is a significant advantage, as winter mornings and late afternoons make a measurable contribution to the annual energy balance. ### What are the dimensions and weight of the DAH Solar DHN-66Z20/DG(BW) panels — is installation complicated? Modules in the DHN-66Z20/DG(BW) series measure approximately 2382 × 1134 × 30 mm and weigh around 32–33 kg — the dual-glass construction replaces the conventional backsheet and adds to the overall mass. A minimum of two installers is required when placing modules on a roof. The frameless Full-Screen design requires dedicated mounting clamps compatible with glass-glass modules; this should be confirmed with the installer when selecting the racking system. ### Is DAH Solar a reliable manufacturer — is the DHN-66Z20/DG(BW) series a safe choice? DAH Solar is listed on the Bloomberg NEF Tier-1 module manufacturer index, confirming financial stability and the capacity to honor long-term warranties. The company is a Chinese manufacturer with a global distribution network and holds IEC, MCS, and other relevant European certifications. The DHN-66Z20/DG(BW) series is currently an active commercial product — not a discontinued model — which simplifies after-sales service and makes it straightforward to source additional modules for system expansions in the future. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-66z20-dg-bw-585-625w-4e08aff12326.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +40 W, lighter, +2.6 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +35 W, lighter, +2.4 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -50 W, lighter, +2.2 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +30 W, lighter, +2.2 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | Cooler, lighter, +2.0 pp | | [Longi Solar LR8-66HVD-660M](https://comparepv.com/panel/longi-lr8-66hvd-660m) | 660 W | +50 W, cooler, +1.9 pp | | [DAH Solar DHN-66Z20/DG(BW)-585W](https://comparepv.com/panel/dah-dhn-66z20-dg-bw-585w) | 585 W | -25 W, -0.9 pp | | [DAH Solar DHN-590Z16/DG(BW)](https://comparepv.com/panel/dah-dhn-590z16-dg-bw) | 590 W | -20 W, -0.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +70 W, lighter, +2.6 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +65 W, lighter, +2.4 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +90 W, cooler, +2.4 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +85 W, cooler, +2.3 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +60 W, lighter, +2.2 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +60 W, lighter, +2.2 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +60 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/dah-dhn-66z20-dg-bw-610 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.