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DAH Solar Brand review

DHN-48Z16/DG(BW)-425

425 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, modest efficiency

Rank 8,711 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.27
Weak · bottom 10%
Density (Wp/m²)
212.7
Weak · bottom 13%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
23.9
Weak · 1.9 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The DAH DHN-48Z16/DG(BW) solar panel series redefines efficiency standards through the use of unique, patented Full-Screen technology. Unlike traditional modules, this design lacks a protruding frame on the edges, which prevents the accumulation of dust and water and allows them to flow freely off the glass surface. This solves one of the industry's biggest problems - a drop in efficiency caused by dirt at the edges - ensuring higher annual yields without the need for frequent cleaning of the installation. At the heart of these modules are advanced N-type TOPCon cells, which offer significantly higher efficiency in low-light conditions and minimal power degradation over the long term. The use of Double Glass technology provides the panels with extreme durability and resistance to external factors, making them an excellent choice for both modern single-family homes and demanding commercial installations. This series stands out from the competition with its double-sided capability, or bifacial, which allows it to generate additional energy from rays reflected off the ground. It is an ideal solution for investors who value innovations that realistically increase system profitability throughout its entire service life, eliminating energy losses resulting from traditional, restrictive frame construction. Choosing these modules is a guarantee of reliability and maximum utilization of the available roof area.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.27% 22.00% Weak · bottom 10% 8,849
Power density 212.7 220.2 Weak · bottom 13% 8,733
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 56.2 51.4 Weak · bottom 21% 10,505
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Residential and commercial.

Not ideal for

Tight roof space, roofs where every square metre has to count and weight-limited structures.

Watch-outs
21.27% module efficiency

Bottom 10% of the TOPCon 400-450 W segment, against a median of 22.00%.

212.7 watts per square metre

Bottom 13% of the TOPCon 400-450 W segment, against a median of 220.2.

56.2 kg per kWp

Bottom 21% of the TOPCon 400-450 W segment, against a median of 51.4.

What owners get
Low Temperature Coefficient — TOPCon Advantage

N-type TOPCon cells exhibit a Pmax temperature coefficient of -0.29%/°C, compared to the typical -0.35 to -0.40%/°C of PERC technology. This translates into measurably higher energy yield during hot summer months, when cell temperatures routinely exceed 50–60°C.

30-Year Linear Power Warranty

The manufacturer guarantees ≥87.4% of nominal power output after 30 years, with degradation ≤0.4%/year beyond year one. The comparable Waaree ARKA offers the same peak power of 455 W but at only 20.93% efficiency and a standard 25-year power warranty, resulting in a significantly weaker long-term performance balance.

Bifacial Double Glass — Additional Energy Generation

The bifacial double-glass construction enables 5–25% additional energy generation from ground-reflected irradiance, depending on surface albedo. The rear glass layer eliminates the delamination risk inherent to glass-foil modules, effectively extending system service life beyond 30 years.

22.77% Efficiency — On Par with Segment Leaders

The 455 W variant achieves 22.77% efficiency, virtually identical to the Sunlike Solar SKT420~455M10-108D6 (22.80%) and IBC Solar LS-TA2 (22.80%), while offering a 5-year longer power warranty advantage (30 years vs. the competitors' standard 25 years).

BNEF Tier 1 — Bankability Confirmed

DAH Solar has maintained BNEF Tier 1 status continuously at least since Q1 2025 (confirmed through Q3 2025), enabling bank financing for commercial projects and reducing manufacturer residual risk for institutional investors and system insurers.

Trade-offs
23.9 kg Weight — Roof Structure Loading

The Double Glass construction (2+2 mm glass, 30 mm total thickness) results in a per-module weight of 23.9 kg — approximately 14–20% heavier than standard glass-foil modules in the same power class (~20–21 kg). For installations on older rooftops or lightweight steel structures, a structural load assessment by a licensed structural engineer is required.

Notes from the database
  • At 21.3% efficiency, this panel is 0.7pp below the TOPCon 400-450W median of 22.0%
  • Power density of 212.7 W/m² is 7.5 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • 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
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.27 % Weak Segment median 22.00%
Vmpp · Impp 29.60 V · 14.36 A Operating point at max power
Voc · Isc 35.00 V · 15.34 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1762×1134×30 mm · 2.00 m² of roof
Weight 23.9 kg Weak Weak · 1.9 kg above median
Cells 96 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 371 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

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 425 Wp appear here. The rest cover the whole series.

30-Year Linear Power Output Warranty 30-Year Linear Power Output Warranty Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
DAH Solar DHN-48Z16/DG(BW)-425 425 W 21.27% -0.290 23.9 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.7 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, lighter, +2.5 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, lighter, +2.5 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, +2.5 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, +2.5 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, cooler, +2.5 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.5 pp
DHN-48Z16/DG(RR)-380W 380 W 19.02% -0.290 23.9 kg -45 W, -2.2 pp
DHN-48Z16/DG(RR)-385W 385 W 19.27% -0.290 23.9 kg -40 W, -2.0 pp
DHN-48Z16/DG(RR)-390W 390 W 19.52% -0.290 23.9 kg -35 W, -1.8 pp
DHN-48Z16/DG(RR)-395W 395 W 19.77% -0.290 23.9 kg -30 W, -1.5 pp
DHN-48Z16/DG(RR)-400W 400 W 20.02% -0.290 23.9 kg -25 W, -1.2 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, cooler, +3.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +80 W, cooler, +3.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +65 W, cooler, +3.2 pp

Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the Full-Screen technology in the DAH Solar DHN-48Z16/DG(BW) panels, and does it genuinely reduce soiling losses?
Full-Screen technology eliminates the protruding aluminum frame along the panel edges. As a result, dust, leaves, and water do not accumulate at the glass perimeter but instead flow freely across the surface. In practice, this translates to lower performance losses caused by soiling — a particularly noticeable benefit in installations that are not cleaned regularly. DAH Solar has patented this solution as a direct response to one of the most common operational issues associated with conventional framed modules.
What warranty do the DAH Solar DHN-48Z16/DG(BW) panels carry, and how much power will they retain after 30 years?
The DHN-48Z16/DG(BW) series comes with a 25-year product warranty covering materials and workmanship, as well as a 30-year linear power output warranty. Annual degradation after the first year of operation is approximately 0.4%, meaning the panel retains more than 87% of its original nominal power of 455 Wp after 30 years. This represents one of the longest power output warranties currently available in the photovoltaic panel market.
Are the DAH Solar DHN-48Z16/DG(BW) panels suitable for ground-mount or flat-roof installations?
Yes. The Double Glass construction — tempered glass on both sides instead of a rear backsheet — makes these panels exceptionally resistant to moisture and condensation, which is critical in ground-mount systems and flat-roof installations where air circulation beneath the module is limited. Furthermore, the bifacial design means that installations over high-albedo surfaces such as gravel, concrete, or snow can generate several to over ten percent additional energy from the rear glass, improving the overall system's return on investment.
Does the bifacial operation of the DHN-48Z16/DG(BW) panels deliver real gains under Polish climatic conditions?
Yes, the bifacial effect yields measurable gains even in Poland. The DHN-48Z16/DG(BW) achieves a bifaciality factor of approximately 80%, which — in installations over a high-albedo surface — translates into several to over ten percent additional annual energy yield. The effect is most pronounced in ground-mount systems with adequate module clearance height and during winter months, when reflected irradiance from snow cover significantly boosts energy production from the rear side.
What are N-type TOPCon cells, and why do DAH DHN-48Z16/DG(BW) panels degrade more slowly than older PERC modules?
N-type TOPCon cells incorporate a tunnel oxide passivation layer that suppresses charge carrier recombination within the cell. In practice, this delivers a module efficiency of 22.77%, superior performance under low-irradiance conditions (early morning, late evening, and overcast skies), and an annual power degradation rate of only approximately 0.4% — roughly half that of PERC technology. Over a 30-year service life, this difference amounts to several additional megawatt-hours of energy generated from the same roof area.
Is DAH Solar a reliable manufacturer, and are the DHN-48Z16/DG(BW) panels readily available in Poland?
DAH Solar is recognized as a Tier 1 manufacturer according to industry rankings, confirming its financial and production stability. The DHN-48Z16/DG(BW) series, rated up to 455 Wp, is currently in production and available through Polish distributors and photovoltaic wholesalers. The manufacturer holds IEC certifications and provides warranty service across Europe — an important consideration for potential warranty claims over the 25-year product warranty period.
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