--- title: "DAH Solar DHN-60R20/DG-510W 510W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-60R20/DG-510W 510W solar panel. Specs: 22.55% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-60r20-dg-510w" updated: 2026-09-11 --- # DAH Solar DHN-60R20/DG-510W Solid all-round for its segment 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-60R20/DG-510W - **Series:** DHN-60R20/DG 495–520W (Double Glass) - **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 hot-climate. ## 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 - **Confirmed BNEF Tier 1 Status Throughout 2025** - DAH Solar maintained its position on the BNEF Tier 1 list continuously from Q1 through Q4 2025, directly supporting project bankability and access to financing. This is a compelling credential for commercial investors and utility-scale PV projects subject to rigorous due diligence. - **~85% Bifaciality — Real-World Yield Gain of +5–25%** - The rated bifaciality of ~85% enables the module to harvest energy from irradiance reflected off the mounting surface. Under typical installation conditions (light-colored rooftop, ground mount, snow cover), this translates to a 5–25% higher annual energy yield compared to equivalent monofacial modules. - **Double Glass Construction — No EVA Backsheet Degradation** - Replacing the polymer backsheet with a glass rear layer eliminates the primary moisture ingress pathway responsible for delamination and PID degradation. Over a 30-year service life, this means lower risk of hidden power losses and reduced O&M costs compared to single-glass modules. - **N-type TOPCon: Temperature Coefficient Pmax ≈ –0.29%/°C** - N-type TOPCon cells exhibit a Pmax temperature coefficient of approximately –0.29%/°C (confirmed for the closely related DHN-54R20-DG series), significantly better than the typical –0.34%/°C for PERC. At a cell temperature of 70°C, the difference amounts to roughly 1.5 percentage points of yield — a meaningful advantage in dense rooftop installations during summer. - **30-Year Linear Power Warranty (≥87% Pmax)** - The manufacturer offers a 30-year power output warranty with a floor of ≥87% of rated Pmax at year 30 — five years longer than the peer comparable Silfab Commercial NTC (standard 25-year warranty). The extended financial horizon improves installation NPV in DCF modeling. ## Cons - **Efficiency Up to 23% — Below Segment Leaders** - The series peaks at 23.0% efficiency, while peer comparables HT-SAAE HT54-18X(N) and TCL HSM-BD60 reach 23.8% and 23.5%, respectively, at the same 520 Wp power class. On an identical roof area (~30 m²), the HT-SAAE module is estimated to produce approximately 3.5% more energy annually — a difference that can amount to several hundred kWh over a 10-year horizon. ## About this series The DAH DHN-60R20/DG 495-520W (Double Glass) series is designed for maximum operational stability in real-world installation conditions - where resistance to mechanical loads, moisture, and accelerated material aging are crucial. The use of a **double glass** construction minimizes the risk of degradation over time, which will be appreciated by investors who prioritize predictable energy yield and lower maintenance costs. These are **bifacial** modules that can also utilize reflected light from the ground, making them particularly well-suited for bright roofs, ground-mounted installations, and applications with high energy production requirements. The **N-TOPCon cell** technology helps maintain high efficiency and stable performance over time, while the **low temperature coefficient** improves performance on hot days - which is important in densely packed roof installations. This series is a good choice for homes, businesses, and PV farms where durability, a longer lifespan, and a real return on investment per square meter are priorities. ## Notable figures - At 22.6% efficiency, this panel is on par with typical \*\*TOPCon 500-550W\*\* modules - At 225.5 W/m² power density, roof space requirements are typical for \*\*TOPCon 500-550W\*\* panels - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 500-550W\*\* panels - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface - #3905 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What warranty coverage applies to DAH Solar DHN-60R20/DG panels? The DHN-60R20/DG series carries a 25-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. After 25 years the module is guaranteed to retain at least 89.4% of its nominal power, and after 30 years at least 87.4%. DAH Solar is listed as a Tier 1 manufacturer, which indicates financial stability and the practical enforceability of warranty claims. ### What does TOPCon technology mean in the DAH DHN-60R20/DG panels, and is it genuinely superior to PERC? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that minimizes electron recombination losses at the cell contacts. In practice this translates to higher efficiency — the DHN-60R20/DG series reaches up to 23% — and a lower temperature coefficient (-0.29%/°C), meaning the module loses less power during hot weather than a typical PERC module. N-type cells also exhibit slower long-term degradation rates compared to conventional P-type PERC technology. ### Will the bifacial version of the DAH DHN-60R20/DG perform well on a typical pitched roof in Poland? Yes, although the bifacial gain — additional yield from light reflected off the underlying surface — is lower on a pitched roof than in a ground-mounted system. On a light or light-gray roofing substrate, a few percent of additional rear-side generation can reasonably be expected. With dark roof tiles the gain will be minimal. The module weighs approximately 27 kg and measures 1994 × 1134 × 30 mm, which is standard for residential and commercial rooftop installations. ### Which installation types are best suited for the DAH DHN-60R20/DG 520 W series? The series has been engineered for three categories of installation: residential homes and farm buildings, where long-term durability and low failure rates over decades are the primary requirements; commercial facilities and warehouses with large roof surfaces, where the high unit power of 520 W reduces the total module count and associated BoS costs; and ground-mounted utility-scale PV plants, where the bifacial double-glass construction maximizes annual energy yield by harvesting reflected irradiance from both sides of the module. ### How does the double-glass construction of the DHN-60R20/DG series differ from standard backsheet modules? In double-glass modules the conventional polymer backsheet is replaced by a second pane of glass (2 mm thick). This construction provides superior resistance to moisture ingress, UV radiation, and mechanical damage — particularly important for ground-mounted installations and harsh climatic environments. It also extends the realistic operational lifetime of the module and reduces the risk of PID (Potential-Induced Degradation). The primary trade-off is a slightly higher module weight of approximately 27 kg. ### Do DAH Solar DHN-60R20/DG panels perform well in winter and under overcast conditions? Yes. N-type TOPCon cells exhibit better spectral response to diffuse irradiance than older PERC technology, which results in higher energy yield on overcast days — a common condition during Polish autumn and winter. The low temperature coefficient (-0.29%/°C) is equally relevant in summer: the hotter the ambient temperature, the smaller the power loss compared to modules with a higher (more negative) temperature coefficient, contributing to improved overall LCOE across the full annual operating cycle. ## 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, +2.4 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-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.