Middle of its segment, needs the roof space
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.
Roofs where every square metre has to count, tight roof space and weight-limited structures.
Bottom 7% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 7,637th in the whole database.
Bottom 8% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 7,734th in the whole database.
Bottom 13% of the TOPCon 450-500 W segment, against a median of 52.2.
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.
- Module efficiency of 21.6% is 0.9pp below average for TOPCon 450-500W panels (median: 22.5%)
- At 215.7 W/m², this panel generates 9.5 W/m² less per unit area than TOPCon 450-500W median (225.2 W/m²)
- Temperature coefficient of -0.29%/°C matches the TOPCon 450-500W median
- Weight of 26.6 kg is 2.6 kg above TOPCon 450-500W median (24.0 kg) - verify structural support
- 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
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 480 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.
Found 471 panels of the same or similar size to this one, within ±10 mm. See them here Found 505 panels of the same or similar size to this one, within ±25 mm. See them here Found 657 panels of the same or similar size to this one, within ±50 mm. See them here Found 1471 panels of the same or similar size to this one, within ±100 mm. See them here