Middle of its segment, needs the roof space
The DAH DHN-66Z16/DG solar panel series introduces a new level of quality to commercial and residential installations thanks to the use of advanced N-type TOPCon cells. This solution effectively eliminates the problem of light- and temperature-induced degradation, which translates into significantly higher efficiency in the long-term perspective. The bifacial double glass construction allows for active energy harvesting from both sides of the module, which is crucial for installations on high-albedo surfaces, such as bright roofs or the ground. The use of half-cut cell technology minimizes energy losses resulting from shading, ensuring stable operation even in difficult weather conditions. Exceptional mechanical strength and a double glass coating make these modules handle extreme snow loads and strong winds perfectly, offering maximum resistance to external factors. This series is dedicated to investors seeking uncompromising performance and investment security for years. Compared to standard P-type modules, these units are characterized by a lower temperature coefficient, which means smaller power drops on hot days. It is an ideal choice for large-scale projects and modern micro-installations where every kilowatt-hour obtained per square meter counts. The innovative sealed edge design further protects the panels against moisture, putting them a step ahead of traditional competition.
Ranking
Signals from the data
Residential, commercial, utility-scale, shaded-installations and hot-climate.
Roofs where every square metre has to count and tight roof space.
Bottom 8% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 7,581st in the whole database.
Bottom 9% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 7,615th in the whole database.
The peak efficiency of 23.14% matches the Techwise Sun-Pursuit Plus (23.14%) and exceeds the Leapton LP182 (22.36%). Achieving the same result as the LONGi Hi-MO 7 (23.1%) at an identical peak power of 625 Wp places this series at the very front of the competitive field among comparable products.
The Pmax temperature coefficient of -0.29%/°C is approximately 15–20% better than that of typical PERC modules (-0.34 to -0.36%/°C). At a module temperature of 65°C — common during Polish summers — power loss is approximately 11.6% versus roughly 13.6–14.4% for PERC modules, resulting in a measurable improvement in summertime energy yield.
N-type cells exhibit Light-Induced Degradation (LID) below 1%, compared to 2–3% for PERC cells. The double-glass construction eliminates moisture ingress and the risk of Potential-Induced Degradation (PID), ensuring more stable power output throughout the module's entire service life. According to the ENF datasheet, guaranteed power output after 30 years is ≥87.4%.
DAH Solar maintains bankable Tier 1 status according to BloombergNEF for Q1, Q3, and Q4 2025 — a key acceptance criterion for project financing by banks, PV funds, and insurers, applicable to both subsidized residential installations and utility-scale commercial projects.
The 15-year product warranty is 3 years longer than that offered by LONGi Solar for the Hi-MO 7 series (12 years), while the guaranteed power output level after 30 years is identical at 87.4%. This represents a favorable relationship for investors comparing TCO (Total Cost of Ownership).
The double-glass construction increases module weight to 32.5 kg (ENF datasheet dimensions: 2382×1134×30 mm), compared to approximately 22–25 kg for typical single-glass framed modules. On older roofs with limited load-bearing capacity (<15 kg/m²), a structural engineering assessment is required, which adds cost and extends project timelines.
Despite its BNEF Tier 1 status, DAH Solar has a significantly narrower network of authorized distributors and service points in Poland compared to LONGi, Trina Solar, or JA Solar. For warranty claims outside major metropolitan areas, response times and logistical availability may be longer.
- Module efficiency of 21.7% is 0.8pp below average for TOPCon 550-600W panels (median: 22.4%)
- Power density of 216.6 W/m² is 7.8 W/m² below TOPCon 550-600W median (224.4 W/m²) - needs more roof space
- At -0.29%/°C, hot weather performance is typical for TOPCon 550-600W panels
- At 32.5 kg (1.3 kg above TOPCon 550-600W median of 31.2 kg), requires checking roof load capacity
- Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
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 585 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 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here