--- title: "DAH Solar DHN-72R20/DG(BW)-615 615W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-72R20/DG(BW)-615 615W solar panel. Specs: 22.77% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-72r20-dg-bw-615" updated: 2026-09-11 --- # DAH Solar DHN-72R20/DG(BW)-615 Solid all-round for its segment 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-72R20/DG(BW)-615 - **Series:** DHN-72R20/DG(BW) - **Rated power:** 615 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 615 W | 620 W | Typical | | | Module efficiency | 22.77% | 22.80% | Typical | 3,073 | | Power density | 227.7 | 227.7 | Typical | 3,077 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.6 kg | 32.7 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.77% | 22.80% | Typical | 3,073 | | Power density | 227.7 | 227.7 | Typical | 3,077 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.0 | 53.1 | Typical | 6,755 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Utility-scale and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 615 W - **Efficiency:** 22.77 % - **Voltage at Pmax (Vmp):** 44.80 V - **Current at Pmax (Imp):** 13.73 A - **Open-circuit voltage (Voc):** 52.60 V - **Short-circuit current (Isc):** 14.78 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:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.6 kg - **Area:** 2.70 m2 - **Power density:** 227.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 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:** 538 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3073 of 14005 | | Power density | 3077 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 6755 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23.14% Efficiency – Segment Leader** - A peak module efficiency of 23.14% places this series on par with the Techwise Solar Sun-Pursuit Plus (23.14%) and ahead of the Longi Hi-MO 7 (23.1%) and Leapton LP182 (22.36%) at the same 625 Wp power class. Higher efficiency directly translates into a smaller installation footprint for the same energy yield. - **Full-Screen – Patented Self-Cleaning Design** - The absence of an aluminum frame protruding above the glass surface eliminates edge accumulation of dust, pollen, and moss — the phenomenon known as frame soiling, which under typical Polish field conditions reduces annual energy yield by 1–3%. For PV plants above 1 MWp, this represents a tangible reduction in both the frequency and cost of module cleaning. - **Low Temperature Coefficient of -0.29%/°C** - A Pmax temperature coefficient of -0.29%/°C outperforms the PERC standard of approximately -0.35%/°C. At a cell temperature of 65°C — typical on a summer day — the module loses roughly 10.2% of its rated power compared to 12.3% for PERC, a difference that is clearly noticeable in Poland's climate during summer production peaks. - **BNEF Tier 1 Throughout 2025 (Q1–Q4)** - DAH Solar maintained BloombergNEF Tier 1 status across all four quarters of 2025, satisfying the tightened criterion — effective from 2025 — of 10 MW in bankable projects. Bankability is a prerequisite for project finance on PV plants above 1 MWp and a condition for access to project insurance. - **30-Year Power Warranty + Glass-Glass Construction** - The 30-year linear power warranty exceeds the 25-year standard offered by most peer comparables. The bifacial double-glass construction eliminates backsheet degradation — typically manifesting as cracking and yellowing after 10–15 years — and enables energy harvest from ground-reflected irradiance, increasing yield by 5–25% depending on surface albedo (gravel, snow, light-colored membrane). ## Cons - **Frameless Module Requires Dedicated Mounting Hardware** - The Full-Screen frameless design is incompatible with standard mid-clamp and end-clamp hardware engineered for framed modules. Installation requires specialized clamping mounts with EPDM pads — such as frameless-compatible systems from Clenergy, K2, or Schletter — which increases BoS costs and limits the availability of compatible racking solutions through Polish distributors. - **Higher Weight of Glass-Glass Construction** - At module dimensions of 2382×1134×30 mm, double-glass units typically weigh 32–36 kg versus 26–28 kg for glass-backsheet equivalents in the same power class. For rooftop installations, this may necessitate a structural engineering assessment of the roof framing, particularly in buildings more than 20 years old. ## About this series The DAH DHN-72R20/DG(BW) series redefines efficiency standards through the use of a patented **Full-Screen** design, which completely eliminates the problem of dust and water accumulation on the module edges. The absence of a traditional frame protruding above the glass surface means that rainfall naturally cleans the surface, preventing energy losses and the formation of hot spots that are dangerous to the cells. The use of modern **N-type TOPCon** technology ensures higher conversion efficiency and excellent performance in low-light conditions, which is crucial in the Polish climate. An additional advantage is the **Bifacial Double Glass** construction, which enables energy harvesting from both sides of the panel, maximizing the return on investment, especially on surfaces with a high reflection coefficient. This product is primarily dedicated to solar farms and large commercial installations, where the costs of regular panel cleaning could significantly reduce the project's profitability. Unlike standard modules, the DHN-72R20/DG(BW) series guarantees long-term energy production stability without the need for frequent maintenance, placing it among the most cost-effective solutions on the PV market. ## Notable figures - At 22.8% efficiency, this panel is on par with typical \*\*TOPCon 600-650W\*\* modules - Power density of 227.7 W/m² matches the \*\*TOPCon 600-650W\*\* median - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - Ranked #3073 out of 14005 panels for efficiency in the database ## Questions ### What warranty coverage applies to the DAH Solar DHN-72R20/DG(BW) panels? The DHN-72R20/DG(BW) series carries a 15-year product warranty covering materials and workmanship, as well as a 30-year linear power output warranty. After 30 years of operation, the panel retains at least 87.4% of its nominal power. This is one of the longest warranty schedules available on the market, making this series particularly attractive for long-term investments such as utility-scale PV farms. ### What is the Full-Screen technology in the DAH Solar DHN-72R20/DG(BW) panels, and why does it matter? The Full-Screen design eliminates the traditional aluminum frame that protrudes above the glass surface. As a result, rainwater flows freely across the entire panel surface, naturally washing away dust and contaminants from the edges. This prevents the formation of hot spots caused by localized soiling, and the panel maintains higher energy output without requiring frequent cleaning — thereby reducing the operations and maintenance costs of a PV plant. ### Do the DAH Solar DHN-72R20/DG(BW) panels perform well under overcast conditions and in the Polish climate? Yes. The N-type TOPCon technology used in this series features a low temperature coefficient of just -0.29%/°C and excellent low-light performance. This means the panel generates power efficiently even on the cloudy days that are typical of the Polish climate, and it loses less power during summer heat than legacy PERC modules of comparable size. ### What are the advantages of bifaciality in the DAH Solar DHN-72R20/DG(BW) panels, and when is it worth leveraging? The Bifacial Double Glass construction allows the panel to harvest energy from both the front and rear sides of the module by capturing light reflected from the ground surface. The greatest gain — which can reach several to more than ten percent of additional annual energy yield — is achieved when the modules are installed above light-colored gravel, a white rooftop, or snow. In standard utility-scale PV farms with adequate ground clearance, bifaciality meaningfully increases annual energy yield at no additional module cost. ### Is the DAH Solar DHN-72R20/DG(BW) panel suitable for installation on a single-family residential rooftop? The DHN-72R20/DG(BW) series is designed primarily for utility-scale PV farms and large commercial installations. The module measures 2382×1134×30 mm and weighs 32.6 kg, which complicates handling and installation on steep pitched roofs and requires a reinforced mounting structure. For prosumer rooftop installations on residential buildings, it is advisable to consider the smaller and lighter modules from DAH Solar's residential product line. ### What is the peak power output of the highest-rated panel in the DAH Solar DHN-72R20/DG(BW) series, and what is its efficiency? The top variant in the series achieves a power output of 625 Wp at a module efficiency of 23.14%. This result is above the market average for 144-cell modules in the 2382×1134 mm format. The high power density means that, for the same roof or ground area, an installation using these modules will generate more energy than one using previous-generation PERC modules of comparable physical size. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dhn-72r20-dg-bw-610-625w-f655fc4c2bd6.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +35 W, lighter, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +30 W, lighter, +2.2 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +2.0 pp | | [Longi Solar LR8-66HVD-665M](https://comparepv.com/panel/longi-lr8-66hvd-665m) | 665 W | +50 W, cooler, +1.9 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (665W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-665w-class) | 665 W | +50 W, cooler, +1.9 pp | | [Huayao HY665-B144DSS](https://comparepv.com/panel/huayao-hy665-b144dss) | 665 W | +50 W, lighter, +1.9 pp | | [Sunpro Power SPDG665-BC132R12](https://comparepv.com/panel/sunpro-spdg665-bc132r12) | 665 W | +50 W, cooler, +1.9 pp | | [DAH Solar DHN-66Z20/DG(BW)-585W](https://comparepv.com/panel/dah-dhn-66z20-dg-bw-585w) | 585 W | -30 W, -1.1 pp | | [DAH Solar DHN-590Z16/DG(BW)](https://comparepv.com/panel/dah-dhn-590z16-dg-bw) | 590 W | -25 W, -0.9 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +65 W, lighter, +2.4 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +60 W, lighter, +2.2 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +85 W, cooler, +2.2 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +80 W, cooler, +2.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +55 W, lighter, +2.0 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +55 W, lighter, +2.0 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +55 W, cooler, +2.0 pp | --- Source: https://comparepv.com/panel/dah-dhn-72r20-dg-bw-615 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.