Solid all-round for its segment
The DAH DHN-54Z20/DG(BW) series is designed for high energy production on a limited surface area - without compromising durability and aesthetics. These double-sided, glass-glass modules can utilize reflected light from the ground, effectively increasing energy yield where other panels stop functioning at the front. In practice, this means more cost-effective installations on sunny roofs, carports, ground-mounted structures, or in modern commercial projects.
The N-type (TOPCon) cells are particularly noteworthy, as they help maintain stable performance over time and perform well in challenging conditions. The series also features technology to minimize the risk of microcracks, which translates into greater reliability during transportation and installation on roofs. Another key feature is low degradation and a long linear warranty, which is important for investors who are planning for long-term energy costs. This is the choice for those who expect maximum yield and predictable performance of the installation in the Polish climate.
Ranking
Signals from the data
Residential, commercial and hot-climate.
DAH Solar guarantees a minimum of 87.4% of nominal power output after 30 years of operation, clearly outperforming JA Solar DeepBlue 4.0 (84.7% after 30 years) — a direct competitor in the same 510 Wp peak-power class. The 2.7 percentage-point difference over a thirty-year installation lifetime translates into measurably higher cumulative energy yield and a superior LCOE.
The -0.29%/°C temperature coefficient is significantly better than that of standard PERC modules (-0.35%/°C). At typical summer module operating temperatures in Poland of 55–65°C, this difference yields approximately 1.7–2.1% higher instantaneous power output compared to PERC technology, with a direct positive impact on annual summer energy yield.
The glass-glass design with a bifaciality factor of ~80% enables utilization of light reflected from the ground surface, realistically increasing energy yield by 5–25% over a monofacial equivalent. The greatest gains are achieved on high-albedo surfaces (white TPO/PVC membranes, gravel, snow), carports, and ground-mounted farms — all typical commercial and prosumer applications in the Polish climate.
DAH Solar is continuously listed on the BloombergNEF Tier-1 module manufacturer ranking, confirmed for at least Q1 2025 and Q4 2025. This status is a standard qualification requirement for project bankability reviews conducted by financial institutions and leasing providers in Poland, effectively reducing financing risk for the investor.
The top variant of the series (510 Wp) achieves 22.92% module efficiency, placing it just below JA Solar JAM60S40 LR (23.0%) and Sunlike Solar SKT510 (22.93%), and 1.72 percentage points above Trina Solar Vertex (21.2%). The series competes directly with the highest-efficiency modules available in the 480–510 Wp power class.
- At 22.5% efficiency, this panel is on par with typical TOPCon 500-550W modules
- At 224.7 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
- 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
- #4576 for efficiency, #2165 for temperature performance out of 14005 panels
Specifications
Datasheet charts
Measured curves published by DAH Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 500 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
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