--- title: "DAH Solar DHN-60R20/DG(BB)-510W 510W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-60R20/DG(BB)-510W 510W solar panel. Specs: 22.55% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-60r20-dg-bb-510w" updated: 2026-09-11 --- # DAH Solar DHN-60R20/DG(BB)-510W Solid all-round for its segment 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-60R20/DG(BB)-510W - **Series:** DHN-60R20/DG(BB) - **Rated power:** 510 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 510 W | 510 W | Typical | | | Module efficiency | 22.55% | 22.73% | Typical | 3,905 | | Power density | 225.5 | 227.4 | Typical | 3,869 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 27.0 kg | 27.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.55% | 22.73% | Typical | 3,905 | | Power density | 225.5 | 227.4 | Typical | 3,869 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 52.9 | 52.4 | Typical | 6,639 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 510 W - **Efficiency:** 22.55 % - **Voltage at Pmax (Vmp):** 37.50 V - **Current at Pmax (Imp):** 13.60 A - **Open-circuit voltage (Voc):** 44.10 V - **Short-circuit current (Isc):** 14.60 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:** 120 - **Bifacial:** yes ### Physical - **Length:** 1994 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 27.0 kg - **Area:** 2.26 m2 - **Power density:** 225.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 446 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3905 of 14005 | | Power density | 3869 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 6639 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Low temperature coefficient (-0.29%/°C)** - The Pmax temperature coefficient of -0.29%/°C places this series clearly above typical PERC modules (-0.35%/°C). In the Polish climate, where rooftops reach 60–70°C in summer, this difference translates into several additional kWh of annual yield for every installed kWp. - **Double glass construction with bifacial technology** - The dual-glass encapsulation eliminates the rear EVA backsheet — the weakest point for moisture and ammonia resistance — which is particularly relevant for agricultural installations and coastal climates. The bifacial design captures an additional 5–15% of energy from reflection off high-albedo surfaces (gravel, concrete, snow) without increasing the installation footprint. - **30-year linear power warranty (≥87.4%)** - The market standard in this segment is a 25-year power warranty. DAH guarantees ≥87.4% of nominal power after 30 years, which — given the increasingly long financing horizons for PV installations (20–25-year loans) — represents a tangible contractual advantage over comparable series such as Silfab Commercial NTC, which offers 25-year coverage. - **BNEF Tier 1 — confirmed bankability** - DAH Solar has appeared on the BNEF Tier 1 list continuously from Q1 2025 through Q3 2025 (confirmed by manufacturer communications and the BNEF database). Tier 1 status is required by the majority of banks and investment funds for financing commercial projects in Poland and the EU — manufacturers without this status are effectively excluded from B2B tenders. - **Full black variant (BB) with no performance compromise** - The DHN-60R20/DG(BB) series combines an all-black aesthetic (black backsheet and black frame) with double glass and bifacial technology — a rare combination, as most full-black modules on the market sacrifice either the rear glass or bifaciality. The power range of 495–520 Wp is identical to the standard version, with no efficiency trade-off. ## Cons - **Lower peak efficiency than the comparison leaders** - The maximum module efficiency of this series is 23.0%, while direct peer comparables — HT-SAAE HT54-18X(N) achieves 23.8% and TCL Zhonghuan HSM-BD60-LA500~520 reaches 23.5%. The 0.8–0.9 percentage-point gap means that on the same roof area, those competing series will deliver meaningfully higher energy yield; this is most relevant for space-constrained installations. ## About this series The DAH DHN-60R20/DG(BB) series are modules designed for maximum yield, where both appearance and stable performance under varying conditions are crucial. The use of **N-type TOPCon cells** helps minimize losses at high temperatures and maintain good performance even under weaker sunlight - which, in the Polish climate, translates to more predictable annual energy production. The **double-glass construction** increases resistance to environmental factors, and in practice, makes it easier to select panels for installations exposed to humidity, fog, or air salinity. They are also **bifacial modules**, which can utilize reflected light from the ground, increasing yield without increasing the roof or ground area. The **full black (BB) variant** is well-suited for modern residential and commercial roofs, where a consistent aesthetic is important. The series is characterized by an approach of "more energy from the same surface area" - without compromising durability or architectural integration. ## Notable figures - At 22.6% efficiency, this panel is on par with typical \*\*TOPCon 500-550W\*\* modules - Power density of 225.5 W/m² matches the \*\*TOPCon 500-550W\*\* median - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 500-550W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - In the top 28% for efficiency among all TOPCon panels ## Questions ### What warranty coverage applies to DAH Solar DHN-60R20/DG(BB) panels? The DHN-60R20/DG(BB) series carries a 25-year product warranty covering material defects and workmanship, along with a 30-year power output warranty. DAH Solar guarantees a degradation rate of approximately 0.4% per year after the first year, which translates to retention of more than 87% of the original rated power over a 30-year horizon. This is one of the most comprehensive warranty packages available in the photovoltaic module market. ### Are the DHN-60R20/DG(BB) modules suitable for the Polish climate with frequent overcast conditions? Yes. The N-type TOPCon cells used in this series feature a low temperature coefficient of approximately -0.29%/°C and superior low-irradiance response compared to standard PERC modules. In practice, this means the DHN-60R20/DG(BB) panels perform more efficiently under typical Polish conditions characterized by cloud cover, fog, and diffuse light, generating more energy on an annual basis than older P-type technologies. ### What advantages does the double glass construction offer in DAH Solar DHN-60R20/DG(BB) panels? The double glass encapsulation, replacing a conventional polymer backsheet, significantly enhances the module's mechanical strength and protects it against moisture ingress, UV radiation, salt mist, and chemical exposure. This is a critical feature for installations near coastal areas, lakes, or agricultural facilities. It also contributes to a longer service life and underpins the 30-year power output warranty offered by the manufacturer. ### How much additional energy do the bifacial DHN-60R20/DG(BB) panels generate compared to standard modules? The DHN-60R20/DG(BB) series consists of bifacial modules with a bifaciality factor of approximately 85%, which according to DAH Solar data yields an energy gain of 5% to 25% by capturing light reflected from the ground surface. The actual benefit depends on the albedo of the underlying surface — light-colored gravel or a white roofing membrane outperform black bitumen felt — as well as the tilt angle. In ground-mounted installations, the bifacial gain is typically higher than in rooftop applications. ### Does the full black (BB) variant of the DHN-60R20/DG(BB) series suit a dark roof or façade on a single-family home? Yes. The BB (Black Back) variant features a uniform all-black aesthetic, with both the frame and the rear of the module finished in a dark color. Modules rated up to 520 W with dimensions of approximately 1994×1134 mm integrate well with modern pitched roofs on single-family homes. It is advisable, however, to coordinate the choice of mounting system with the installer, as the double glass construction adds a slight weight increase compared to the backsheet version. ### Is DAH Solar a reliable manufacturer, and do the DHN-60R20/DG(BB) panels hold the necessary certifications? DAH Solar is classified as a Tier 1 manufacturer according to the BNEF bankability rating, indicating financial stability and large-scale production capacity that supports long-term warranty claim fulfillment. The DHN-60R20/DG(BB) series holds a CE Declaration of Conformity along with IEC 61215 and IEC 61730 certifications, which are mandatory for the legal deployment of modules in prosumer and commercial installations within the European Union. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-60r20-dg-bb-495-520w-479900112b24.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +2.4 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +50 W, cooler, +2.2 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.1 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +45 W, cooler, +2.1 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +1.9 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +1.9 pp | | [DAH Solar DHN-60R20/DG(BB)-495W](https://comparepv.com/panel/dah-dhn-60r20-dg-bb-495w) | 495 W | -15 W, -0.7 pp | | [DAH Solar DHN-60R18/DG-500](https://comparepv.com/panel/dah-dhn-60r18-dg-500) | 500 W | -10 W, -0.4 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +40 W, lighter, +1.8 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +30 W, lighter, +1.8 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +30 W, lighter, +1.8 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +35 W, cooler, +1.7 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +35 W, cooler, +1.6 pp | --- Source: https://comparepv.com/panel/dah-dhn-60r20-dg-bb-510w 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.