--- title: "DAH Solar DHN-60R18/DG 505W 505W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-60R18/DG 505W 505W solar panel. Specs: 22.33% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-60r18-dg-505w" updated: 2026-09-11 --- # DAH Solar DHN-60R18/DG 505W 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 505W - **Series:** DHN-60R18/DG - **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, commercial and hot-climate. - **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 Design – Active Self-Cleaning** - The patented frameless front-edge design eliminates sediment retention along the module's bottom edge. In practice, this prevents hot spots caused by shading from accumulated soiling; on low-tilt installations (\< 15°), this can translate into a +2–5% gain in annual energy yield compared to conventional framed modules under identical conditions. - **Low Temperature Coefficient** - The Pmax temperature coefficient is -0.29%/°C, while typical PERC modules range from -0.34 to -0.38%/°C. On hot summer days (e.g., 65°C cell temperature), this results in approximately 3 percentage points less power loss relative to PERC — a meaningful advantage given Poland's extended summer irradiance periods. - **30-Year Linear Power Warranty** - The manufacturer guarantees ≥89.4% of rated power after 25 years and ≥87.4% after 30 years. By comparison, the Silfab Commercial NTC (peer comparable) offers a standard 25-year warranty. The extended coverage directly improves project bankability and reduces risk in DCF models for commercial installations. - **BNEF Tier 1 – Bankability Confirmed** - DAH Solar has maintained BNEF Tier 1 status continuously across all quarters of 2025 (Q1, Q3, and Q4 publicly confirmed). This designation is required by the majority of EU PV project lenders and reduces the cost of debt financing for commercial and utility-scale installations. - **Double Glass Mechanical Durability** - The dual-glass construction withstands snow loads up to 5,400 Pa and wind loads up to 2,400 Pa. Eliminating the front EVA encapsulant and using a glass backsheet removes the risk of PID degradation and backsheet delamination (snail trails) — particularly important for assets with extended service lives (>20 years without module replacement). ## Cons - **Efficiency Below Segment Leaders** - The maximum efficiency of 23.0% is lower than the HT-SAAE HT54-18X(N) (23.8%) and TCL Zhonghuan HSM-BD60-LA (23.5%) at the same 520 Wp rating. On roof areas where space is constrained (e.g., \<30 m²), the DHN-60R18/DG series requires approximately 3–4% more area to achieve the same system output as the highest-efficiency peer comparables. - **27 kg Weight – Constraint for Low-Load-Bearing Roofs** - The module weighs 27 kg, owing to its dual-glass construction, versus ~21–23 kg for typical backsheet modules. On roofs with limited structural capacity (older buildings, lightweight industrial structures), an additional structural engineering assessment is required, adding approximately PLN 500–1,500 to the project cost per installation. ## About this series The DAH DHN-60R18/DG photovoltaic panel series sets completely new efficiency standards thanks to the use of an innovative, patented **Full-Screen** design. Unlike traditional modules, the front side of these panels is completely free of a protruding frame, allowing rainwater to freely wash away dust and any contaminants from the entire surface. This solution effectively eliminates the problem of sediment accumulation on the lower edge, which in classic installations often leads to cell shading, dangerous power drops, and the formation of hot-spots. The use of advanced **N-type TOPCon** cells guarantees excellent yields even in low, diffused sunlight and exceptionally low annual parameter degradation. Additionally, these modules are manufactured using **Bifacial Double Glass** technology, which not only significantly increases their mechanical resistance to harsh weather conditions but also enables additional energy production from the back side of the panel. It is an ideal solution for demanding roofs with a low inclination angle and modern commercial installations, where maintenance-free operation and maximized cost-effectiveness are priorities. By choosing the DHN-60R18/DG series, the user gains **energy yields higher by up to 15 percent** on an annual scale, while enjoying unique aesthetics and the highest reliability, confirmed by the manufacturer's extended warranty. ## 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 - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - #5054 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What is the Full-Screen design used in DAH Solar DHN-60R18/DG panels and what difference does it make in practice? In the DHN-60R18/DG series, the front edge of the module has no protruding aluminum frame. As a result, rainwater flows freely across the entire surface, washing away dust and contaminants without forming sediment deposits along the lower edge. In conventional panels, dirt accumulated there causes cell shading, which can lead to hot-spot formation and permanent power degradation. The Full-Screen design mitigates this effect without the need for manual cleaning. ### How much additional energy does the bifacial technology in DAH Solar DHN-60R18/DG panels generate? The DHN-60R18/DG modules are built using Bifacial Double Glass technology, meaning the rear glass also transmits light and allows the cells to generate current from energy reflected off the ground or surrounding surfaces. With a bright albedo surface (gravel, white membrane, snow), the rear-side energy gain can reach several to over ten percent. The manufacturer claims annual energy yield gains of up to 15% compared to standard monofacial modules. ### How do DAH Solar DHN-60R18/DG panels perform in overcast conditions or at low irradiance levels? The DHN-60R18/DG series uses N-type TOPCon cells, which feature a very low temperature coefficient of Pmax at -0.29%/°C and excellent response to diffuse irradiance. In practice, this means the modules maintain high efficiency under overcast skies and on cooler days — a particularly important characteristic given Poland's climate, where limited solar irradiance is common for a significant portion of the year. ### What warranty is offered on DAH Solar DHN-60R18/DG photovoltaic panels? DAH Solar provides a 25-year product warranty on the DHN-60R18/DG series, covering manufacturing defects and material faults. In addition, a 30-year linear power output warranty applies, guaranteeing at least 87.4% of nominal power at the end of that period. Such an extended linear warranty is the standard for modules built with N-type TOPCon cells and confirms the manufacturer's standing as a Tier-1 supplier. ### Is the DAH Solar DHN-60R18/DG series suitable for roofs with a low tilt angle? Yes, the DHN-60R18/DG series was designed with low-pitch roofs in mind. The Full-Screen construction without a front frame eliminates the dirt and water accumulation problem at the module edge, which is especially pronounced on flat and low-slope roof surfaces in conventional modules. The double glass construction also provides high resistance to snow loads of up to 5,400 Pa and wind loads of up to 2,400 Pa. ### Are DAH Solar DHN-60R18/DG panels still available for purchase? The DHN-60R18/DG series has been discontinued by DAH Solar and is no longer offered as new stock through regular distribution channels. Individual units or pallets may occasionally surface from intermediate warehouses; however, availability is limited and supply continuity cannot be guaranteed. When planning a new installation, it is advisable to consider currently manufactured DAH Solar series based on the same N-type TOPCon technology. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-60r18-dg-500-520w-0303ee25cb5a.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-505w 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.