Solid all-round for its segment
DAH DHN-48Z20/DG panels are revolutionizing the market thanks to the patented Full Screen design, which eliminates the problem of sediment buildup on the edges of the module. The absence of a protruding frame allows water to freely wash away dust and dirt, which directly translates into higher energy yields without the need for frequent maintenance. The use of N-type TOPCon cells guarantees excellent efficiency even in low light conditions and significantly lower power degradation over time. Thanks to Double Glass technology, the modules are characterized by exceptional mechanical resistance and a longer lifespan, making them an ideal choice for demanding rooftop and ground-mounted installations. The use of bifaciality allows for additional absorption of reflected rays, which optimizes system performance in diverse terrain. This series is dedicated to investors looking for maintenance-free solutions that effectively solve the problem of efficiency drops caused by soiling. Compared to the competition, the DHN-48Z20/DG model stands out with its unique combination of compact size and maximum surface efficiency, facilitating installation on roofs with complex geometry. It is a professional tool for achieving the highest return on investment in the Polish climate.
Ranking
Signals from the data
Residential, commercial and hot-climate.
The frameless front eliminates the edge-accumulation effect of dust and deposits — DAH Solar claims 6–15% higher energy yield compared to conventional framed modules without additional maintenance. The patent protects the uniqueness of the solution in the market and is a direct response to real-world efficiency losses caused by edge soiling.
Cells exhibit a maximum degradation of 1% in Year 1, followed by ≤0.4%/year, guaranteeing ≥87.4% of rated power after 30 years. The Pmax temperature coefficient of -0.29%/°C compares favorably to the typical -0.34%/°C for PERC, translating into measurably higher yield during hot summer conditions.
The manufacturer guarantees output power for 30 years with clearly defined thresholds (≥87.4% after 30 years), while the peer-comparable Waaree ARKA offers a standard 25-year warranty. The extended warranty directly reduces investment risk when modeling project NPV and IRR, and facilitates project financing.
A bifaciality of ~80% enables absorption of irradiance reflected from the ground surface, yielding a real additional output gain of approximately 3–8% per year under local conditions (winter snow cover, light-colored membranes, white gravel). The glass-glass construction replaces the backsheet, improving mechanical resilience and eliminating the risk of delamination.
DAH Solar appears on the BNEF Tier-1 list continuously in Q1 and Q3 2025, facilitating project financing with lenders, acceptance by insurers, and compliance with due diligence requirements for utility-scale projects.
The frameless Full Screen design is incompatible with standard framed-module clamps (e.g., Schletter, K2 Systems). DAH Solar has certified a dedicated ARaymond PowAR Snap® S+ / PowAR Slot mounting system, which may limit the choice of BoS suppliers and requires verification of certified accessory availability with the specific installation contractor.
- Efficiency of 22.0% matches the TOPCon 400-450W median
- At 220.2 W/m² power density, roof space requirements are typical for TOPCon 400-450W panels
- Temperature coefficient of -0.29%/°C matches the TOPCon 400-450W median
- At 23.9 kg, this panel is 1.9 kg heavier than the TOPCon 400-450W median (22.0 kg) - more demanding for installation crews
- 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 440 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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