--- title: "DAH Solar DHN-60R18/DG(BB)-505 505W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-60R18/DG(BB)-505 505W solar panel. Specs: 22.33% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-60r18-dg-bb-505" updated: 2026-09-11 --- # DAH Solar DHN-60R18/DG(BB)-505 Middle of its segment, needs the roof space 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-60R18/DG(BB)-505 - **Series:** DHN-60R18/DG(BB) - **Rated power:** 505 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) | 505 W | 510 W | Typical | | | Module efficiency | 22.33% | 22.73% | Weak - bottom 24% | 5,054 | | Power density | 223.3 | 227.4 | Weak - bottom 23% | 5,028 | | 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 | 22.33% | 22.73% | Weak - bottom 24% | 5,054 | | Power density | 223.3 | 227.4 | Weak - bottom 23% | 5,028 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.5 | 52.4 | Typical | 7,409 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **223.3 watts per square metre** - Bottom 23% of the TOPCon 500-550 W segment, against a median of 227.4. - **22.33% module efficiency** - Bottom 24% of the TOPCon 500-550 W segment, against a median of 22.73%. - **Best for:** Residential and commercial. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 505 W - **Efficiency:** 22.33 % - **Voltage at Pmax (Vmp):** 37.30 V - **Current at Pmax (Imp):** 13.54 A - **Open-circuit voltage (Voc):** 43.90 V - **Short-circuit current (Isc):** 14.54 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 - **Bifacial gain:** 25.00 ### Physical - **Length:** 1994 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 27.0 kg - **Area:** 2.26 m2 - **Power density:** 223.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 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:** 441 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5054 of 14005 | | Power density | 5028 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 7409 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Full-Screen Technology – +11.5% Energy Yield (TÜV Nord)** - The patented frameless front design eliminates dust accumulation and water pooling at module edges. An independent TÜV Nord field test (Xixia, Ningxia) recorded 11.5% higher energy yield compared to a standard 182 mm module (161.17 kWh/kW vs. 144.54 kWh/kW) — a verified measured figure, not a marketing claim. - **Low Temperature Coefficient (-0.29%/°C)** - N-type TOPCon technology delivers a Pmax temperature coefficient of -0.29%/°C, versus -0.34 to -0.35%/°C typical of PERC modules. At a cell temperature of 70°C, power loss is approximately 1.5 percentage points lower than PERC, translating to tens of additional kWh per year for a residential prosumer system under Central European climatic conditions. - **30-Year Power Warranty – 87.4% Pnom** - The manufacturer guarantees ≥87.4% of nominal power after 30 years, exceeding the industry-standard 25-year warranty with ~84.8% end-of-life retention offered by comparable products such as the Trina Solar Vertex S or JA Solar DeepBlue 4.0. The extended warranty horizon directly improves project IRR in financial models used to bankroll PV installations. - **Confirmed BNEF Tier 1 – Q1–Q4 2025** - DAH Solar maintained BNEF Tier 1 status throughout the full year 2025, including after the qualification criteria were tightened from a 5 MW to a 10 MW minimum reference project size in Q1 2025. Bankable classification removes financing and re-insurance risk for projects funded by institutional lenders. - **Double Glass Bifacial – Durability and Albedo Gain** - The bifacial double-glass construction (2 mm + 2 mm) meets IEC 61730-certified mechanical load ratings: 5,400 Pa snow load and 2,400 Pa wind load. When installed over high-albedo surfaces (sand, gravel, or white TPO membrane), bifaciality delivers a real-world yield gain of 5–15% at no additional cell cost. ## Cons - **Module Efficiency Below Top Peer Comparables** - The series peaks at 23.0% efficiency, while direct segment competitors reach higher values: HT-SAAE HT54-18X(N) at 23.8% (+0.8 pp.) and TCL Zhonghuan HSM-BD60-LA at 23.5% (+0.5 pp.). In a 1 MWp utility-scale array, an 0.8 pp. efficiency gap requires approximately 3–4 additional modules to achieve the same peak power output. - **Frameless Design Requires Dedicated Mounting Hardware** - The absence of a front aluminum frame necessitates specialized frameless end-clamps that are incompatible with standard framed-module racking systems. This increases BoS cost and extends engineering time, particularly during an installer's first deployment of this module type. ## About this series The DAH DHN-60R18/DG(BB) series is a breakthrough solution utilizing patented **Full-Screen** technology, which completely eliminates dust accumulation and water stagnation on the module edges. Thanks to the innovative design without a protruding frame at the top, these panels effectively solve the common problem of energy loss resulting from dirt buildup, which translates into a real increase in yields by several to over a dozen percent annually. The use of advanced N-type cells in **TOPCon** architecture guarantees excellent efficiency and minimal annual degradation, providing investors with high profitability for decades. This model stands out with its **Double Glass** construction, which, combined with bifaciality, allows for efficient energy generation from reflected radiation, which is crucial for installations on light-colored surfaces. It is an ideal choice for homeowners and large PV farms looking for maintenance-free modules, especially in locations with a low roof pitch angle. Unlike traditional panels from competitors, the DHN-60R18/DG(BB) series combines modern aesthetics with the highest resistance to micro-cracks and **no PID effect**, making it an unrivaled choice for demanding users who focus on longevity and maximum system performance. ## Notable figures - At 22.3% efficiency, this panel is on par with typical \*\*TOPCon 500-550W\*\* modules - 223.3 W/m² power density is 4.1 W/m² below \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - requires larger installation area - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 500-550W\*\* panels - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - #5054 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### Is the DAH Solar DHN-60R18/DG(BB) series still available for purchase? The DHN-60R18/DG(BB) series has been discontinued and is no longer actively offered by the manufacturer. Limited inventory may still exist with certain distributors, though availability cannot be guaranteed. If you are looking for a comparable solution, it is worth considering newer DAH Solar modules featuring TOPCon and Full-Screen technology currently available in the manufacturer's active lineup. ### What is the Full-Screen technology used in the DAH Solar DHN-60R18/DG(BB) panels? Full-Screen technology eliminates the protruding frame along the top edge of the module, allowing rainwater to flow freely across the glass surface and wash away dust and contaminants. Conventional panels accumulate deposits at the frame, causing persistent shading of the bottom cells. According to DAH Solar, the self-cleaning effect translates into a measurable increase in energy yield of several to over ten percent per year, with the benefit being especially pronounced on rooftops with low tilt angles. ### What warranty is offered on the DAH Solar DHN-60R18/DG(BB) panels? The manufacturer provides a 25-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. After 30 years, the module is warranted to retain at least 87.4% of its original rated power. The N-TOPCon cell technology ensures an annual degradation rate of approximately 0.4%, placing this series well above prevailing industry standards. ### Does the DHN-60R18/DG(BB) panel perform better in summer or winter, and how does it handle high temperatures? With a power temperature coefficient of only -0.29%/°C, the DHN-60R18/DG(BB) modules lose less efficiency on hot days than typical polycrystalline panels, which typically exhibit coefficients of approximately -0.40 to -0.45%/°C. This results in meaningfully higher energy yields during summer months. In winter, the Double Glass construction and frameless top edge facilitate faster snow shedding from the module surface, reducing system downtime. ### Does the bifacial design of the DAH Solar DHN-60R18/DG(BB) panels provide a benefit when installed on a pitched roof? Yes, although the bifacial gain is most pronounced in ground-mounted systems over high-albedo surfaces. On a pitched roof the rear-side contribution is lower but still measurable, particularly over light-colored roof tiles or membranes. Bifacial modules are generally estimated to generate 5–15% more energy on an annual basis. The Double Glass construction also provides superior resistance to moisture ingress and microcracks compared to modules with a conventional backsheet. ### Are the 520 Wp DAH Solar DHN-60R18/DG(BB) panels suitable for a residential photovoltaic installation? Yes, modules rated up to 520 Wp are compatible with typical prosumer inverters and standard rooftop mounting structures. However, the dimensions of 1994 × 1134 × 30 mm and a weight of approximately 28 kg require a robust racking system and an experienced installer. The series is suitable for both larger single-family homes and small-scale PV farms. Given the product's discontinued status, it is advisable to confirm stock availability and warranty service terms with your distributor before committing to a purchase. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-60r18-dg-bb-495-520w-c234ecb63854.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +2.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +50 W, cooler, +2.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +2.2 pp | | [DAH Solar DHN-60R20/DG(BB)-495W](https://comparepv.com/panel/dah-dhn-60r20-dg-bb-495w) | 495 W | -10 W, -0.4 pp | | [DAH Solar DHN-60R18/DG-500](https://comparepv.com/panel/dah-dhn-60r18-dg-500) | 500 W | -0.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +55 W, cooler, +2.5 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +45 W, lighter, +2.1 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +35 W, lighter, +2.1 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +35 W, lighter, +2.1 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +40 W, cooler, +1.9 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +40 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/dah-dhn-60r18-dg-bb-505 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.