--- title: "DAH Solar DHN-60R20/DG-505 505W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-60R20/DG-505 505W solar panel. Specs: 22.33% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-60r20-dg-505" updated: 2026-09-11 --- # DAH Solar DHN-60R20/DG-505 Middle of its segment, needs the roof space 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-60R20/DG-505 - **Series:** DHN-60R20/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 - **Patented Full-Screen Technology** - The frameless front surface eliminates edge sediment buildup — a genuine issue for installations in Poland, where roof pitch angles frequently range from 15–30°. This translates to lower maintenance costs and reduced hot-spot risk without investment in cleaning systems. - **30-Year Linear Power Warranty** - DAH guarantees power output for 30 years, while the industry standard for most manufacturers (Silfab, JA Solar, Trina) is 25 years. This is a tangible advantage when calculating LCOE for commercial and prosumer installations with a 25+ year horizon. - **N-Type TOPCon — Lower LID and Better Thermal Performance** - N-type cells exhibit LID degradation below 1% (vs. 1.5–2% for P-type PERC) and a typical temperature coefficient of -0.30%/°C (vs. -0.35%/°C for PERC), delivering measurably higher yield during summer months when Polish module temperatures regularly reach 60–70°C. - **Bifacial Double-Glass — Durability and Additional Yield** - The dual-glass construction eliminates the risk of EVA corrosion and PID degradation, while a bifaciality factor of ~80% enables an additional 5–15% yield gain in ground-mounted installations with high-albedo surfaces. Mechanical load rating: >5,400 Pa front / >2,400 Pa rear. - **BNEF Tier 1 — Confirmed Bankability** - DAH Solar has maintained continuous BNEF Tier 1 status throughout 2025 (confirmed for Q1 and Q4 2025), enabling access to project financing without additional collateral and reducing counterparty risk in commercial installations. ## Cons - **Efficiency Below Segment Leaders** - The series reaches a maximum efficiency of 23.0%, while direct peer comparables achieve 23.8% (HT-SAAE HT54-18X(N)) and 23.5% (TCL Zhonghuan HSM-BD60-LA). The 0.5–0.8 percentage point gap translates to approximately 3–5 cm² of additional module area per kWp — a relevant constraint for roof-mounted installations with limited available surface. ## About this series The DAH DHN-60R20/DG series redefines performance standards thanks to the use of patented **Full-Screen technology**, which eliminates the problem of sediment accumulation at the frame edges. Unlike traditional modules, the flat front surface allows rainwater to flow freely along with impurities, which eliminates the risk of hot-spots and significantly reduces maintenance costs. This series is based on advanced **N-type cells**, which are characterized by higher efficiency and a much better temperature coefficient compared to standard P-type solutions. The use of a **bifacial double-glass** design makes the modules exceptionally resistant to extreme mechanical loads and corrosive factors, while simultaneously generating additional energy from reflected radiation. This is a solution dedicated to demanding rooftop and ground-mounted installations, where maintaining maximum yields without the need for frequent panel cleaning is key. Thanks to the **absence of a frame rim**, this series beats the competition in real-world power generation tests, especially on surfaces with a low tilt angle. Investing in these modules is a guarantee of stable system operation for decades, combining modern aesthetics with technical innovations that solve real operational problems for photovoltaic installation owners in Poland. ## Notable figures - At 22.3% efficiency, this panel is on par with typical \*\*TOPCon 500-550W\*\* modules - Power density of 223.3 W/m² is 4.1 W/m² below \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - needs more roof space - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 500-550W\*\* median - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - Ranked #5054 out of 14005 panels for efficiency in the database ## Questions ### What is the Full-Screen technology in DAH Solar DHN-60R20/DG panels and why does it matter? Full-Screen is a patented DAH Solar design that eliminates the front frame rail on the module. The resulting flush front surface allows rainwater to flow freely across the glass, carrying dust and contaminants with it, rather than pooling against a frame lip as it does in conventional framed panels. This translates into fewer hot-spots, higher real-world energy yields — particularly on low-tilt rooftops — and measurably lower cleaning costs over the full system lifetime. ### What warranty does the DAH Solar DHN-60R20/DG series carry and what does it cover? The DHN-60R20/DG series comes with a 25-year product warranty covering material defects and workmanship, plus a 30-year linear power output warranty. DAH Solar holds Tier 1 manufacturer status, which reflects financial stability and the practical ability to honor warranty claims. The power warranty guarantees that the module will maintain specified minimum output levels for three decades — one of the longest performance guarantees currently available on the market. ### Why are the N-type TOPCon cells in the DHN-60R20/DG superior to standard PERC panels? N-type TOPCon cells deliver higher conversion efficiency and a lower temperature coefficient (approximately -0.29 %/°C) compared to typical P-type PERC cells. In practice, this means the panel loses less power output on hot days than competing PERC-based modules. The additional TOPCon passivation layer also suppresses LID (Light-Induced Degradation), so the module continues to operate closer to its rated 520 W nameplate power over the years. ### Will the DAH Solar DHN-60R20/DG panel perform well in winter and under overcast conditions? Yes. The bifacial double-glass construction allows the module to harvest energy from both the front side and from irradiance reflected off snow or light-colored surfaces, which is particularly advantageous in winter. The low temperature coefficient of TOPCon cells means that on cold, sunny days the panel can approach its STC-rated output. The dual-glass structure also provides strong resistance to snow loads and high wind pressures. ### Is the DHN-60R20/DG series suitable for a pitched roof with a low tilt angle? Yes, and this is one of the series' most notable advantages. The absence of a front frame lip means that even at tilt angles of 5–15°, soiling does not accumulate along the module edge. Conventional framed panels create a ledge at the frame base where dirt and moss collect, reducing system efficiency over time. The DHN-60R20/DG addresses this issue at the design level, removing the need for frequent maintenance interventions. ### What is the peak power output of the DHN-60R20/DG panel and how does it compare to the market? The top variant in the series achieves 520 Wp with a module efficiency approaching approximately 23%. This places it on par with the leading premium panels available in Poland. For a typical residential system in the 6–10 kWp range, between 12 and 20 modules of this series are required. Given the compact dimensions of approximately 1,994 × 1,134 mm, this results in highly efficient use of available roof area. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-60r20-dg-495-520w-a2d347950ec1.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-60r20-dg-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.