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DAH Solar Brand review

DHN-54Z16/DG-490W

490 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, needs the roof space

Rank 5,399 of 14,005
Compare panels Datasheet PDF
Power (Wp)
490
Strong · top 12%
Efficiency (%)
22.02
Weak · bottom 20%
Density (Wp/m²)
220.2
Weak · bottom 18%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
26.6
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The DAH DHN-54Z16/DG series, with a power output of 480-510W, is designed to maximize energy yield in situations where every square meter of roof or ground space is valuable. A key advantage is the combination of N-type TOPCon cell technology with a dual-glass construction, which results in more stable performance over time and better resistance to environmental factors compared to many standard single-sided modules. Furthermore, the module is bifacial, meaning it can utilize reflected light from the ground - a real advantage for roofs, membranes, and ground-mounted installations.

In practice, this series solves common problems faced by installers and investors: limited space, declining performance over time, and increased risk of mechanical damage. Thanks to the SMBB (multi-busbar) connection architecture, the module is better able to withstand microcracks and withstand loads.

This is a good choice for premium home installations, commercial buildings, and PV farms, especially where durability, high power density, and predictable energy production are important.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.02% 22.52% Weak · bottom 20% 6,329
Power density 220.2 225.2 Weak · bottom 18% 6,321
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.3 52.2 Typical 8,524
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 · 3 caution
Best for

Residential, commercial and hot-climate.

Not ideal for

Roofs where every square metre has to count and tight roof space.

Watch-outs
220.2 watts per square metre

Bottom 18% of the TOPCon 450-500 W segment, against a median of 225.2.

22.02% module efficiency

Bottom 20% of the TOPCon 450-500 W segment, against a median of 22.52%.

What owners get
N-type TOPCon + bifacial: real-world energy yield gains

N-type TOPCon cells exhibit lower LID/LeTID degradation rates and better high-temperature performance than standard PERC. Combined with a bifacial construction, the module harvests additional energy from reflected irradiance (typical bifacial gain: +5–15%), delivering a measurable advantage in ground-mount installations and systems deployed over light-colored membranes.

30-year linear power output warranty

DAH guarantees linear power retention for 30 years — 5 years longer than the Trina Solar Vertex (25 years) in the same power class. The extended warranty horizon directly improves project bankability and reduces investment risk in ROI calculations.

Dual-glass construction: 5,400 Pa mechanical resistance

The double-glass design (replacing a conventional backsheet) raises snow load resistance to 5,400 Pa and wind load resistance to 2,400 Pa, eliminates moisture ingress responsible for PID, and significantly reduces the risk of microcracks. For rooftop installations in Central European climates (snow loads up to 2.5 kN/m²), this provides a meaningful structural safety margin.

BNEF Tier 1 Q4 2025 — bankability confirmed

DAH Solar has maintained BloombergNEF Tier 1 status continuously from at least Q1 2025 through Q4 2025, confirming the manufacturer's ability to secure project finance. For institutional investors and utility-scale PV farms, Tier 1 classification is a prerequisite when pursuing bank financing.

SMBB — reduced sensitivity to microcracks

The Super Multi Busbar architecture distributes current across a greater number of contact points, allowing the module to retain a higher percentage of its rated power even after cell microcracks develop. This is particularly relevant during transport of large-format modules and during installation on uneven substrates.

Trade-offs
26.6 kg weight — a constraint for low load-bearing roofs

The dual-glass construction raises module weight to 26.6 kg, approximately 15–20% more than a typical monofacial backsheet module (~22–24 kg) in the same power class. For dense array layouts on roofs with limited structural capacity (e.g., older metal roof tiles, precast concrete decks), a structural engineering review is required before specifying this series.

Notes from the database
  • At 22.0% efficiency, this panel is on par with typical TOPCon 450-500W modules
  • Power density of 220.2 W/m² is 5.0 W/m² below TOPCon 450-500W median (225.2 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 450-500W panels
  • At 26.6 kg, this panel is 2.6 kg heavier than the TOPCon 450-500W median (24.0 kg) - more demanding for installation crews
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 490 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.02 % Weak Segment median 22.52%
Vmpp · Impp 33.50 V · 14.63 A Operating point at max power
Voc · Isc 39.50 V · 15.58 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1962×1134×30 mm · 2.22 m² of roof
Weight 26.6 kg Typical Typical · median 24.0 kg
Cells 108 · 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 428 W guaranteed

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 490 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-54Z16/DG-490W 490 W 22.02% -0.290 26.6 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +3.0 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.8 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +2.7 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.5 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +2.5 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +2.5 pp
DHN-54Z20/DG(BW)-480 480 W 21.57% -0.290 26.6 kg -10 W, -0.4 pp
DHN-54Z20/DG(BW)-485 485 W 21.80% -0.290 26.6 kg -0.2 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +70 W, cooler, +2.8 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +65 W, cooler, +2.6 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +60 W, lighter, +2.4 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +50 W, lighter, +2.4 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +50 W, lighter, +2.4 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +55 W, cooler, +2.2 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +55 W, cooler, +2.2 pp

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

Common questions

6 answered
What is the TOPCon technology used in the DAH Solar DHN-54Z16/DG series, and is the premium price really justified?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture featuring an additional passivation layer that minimizes electron recombination losses. In practice, this translates to higher module efficiency — the DHN-54Z16/DG series achieves approximately 22.9% — and a slower power degradation rate over time compared to conventional PERC cells. For the end investor, this means more kilowatt-hours generated from the same roof area over the full system lifetime.
Are the DAH Solar DHN-54Z16/DG 510W modules suitable for installation on steep pitched roofs?
Yes, although the physical dimensions and weight must be taken into account: the module measures approximately 1962×1134 mm and weighs approximately 26.6 kg. The dual-glass construction increases frame rigidity, which facilitates secure fastening on standard hook-based racking systems. The module withstands wind loads up to 2400 Pa and snow loads up to 5400 Pa, making it well suited for roofs exposed to typical Central European winter conditions.
What does bifacial mean for the DHN-54Z16/DG panel, and how much additional energy does the rear side actually generate?
Bifacial means the cells harvest light from both the front side and the rear side — through a transparent glass backsheet. The actual energy gain depends on the albedo of the surface below: a light-colored roofing membrane or white gravel can contribute 5–15% additional energy yield, while a dark bituminous felt will deliver significantly less. The greatest bifacial gains are achieved in ground-mounted installations where sufficient clearance between the module and the ground is maintained.
What warranty does DAH Solar offer on the DHN-54Z16/DG series modules, and what does it cover?
DAH Solar provides a 25-year product warranty covering physical defects and material faults, as well as a 30-year linear power output warranty. In practice, this means the manufacturer guarantees a specified minimum performance level for three decades. DAH Solar holds Tier 1 manufacturer status, providing additional confidence in the company's long-term ability to honor warranty claims.
Does the DHN-54Z16/DG series perform well on overcast days and at the lower temperatures typical of the Polish climate?
N-type TOPCon cells have a lower temperature coefficient than standard PERC cells, meaning power output drops less during high-temperature conditions. At low temperatures and under diffuse irradiance, the module performs at least on par with other modern monocrystalline modules. The dual-glass encapsulation provides additional protection against moisture ingress, which is particularly important in climates characterized by frequent freeze-thaw cycles.
Are the DAH Solar DHN-54Z16/DG 480–510W modules compatible with the inverters commonly available in Poland?
Yes. The series operates at an open-circuit voltage of approximately 37–38 V (STC) and is compatible with both 1000 V and 1500 V DC systems, ensuring broad compatibility with inverters from Fronius, SMA, Huawei, Growatt, and other widely available brands. Before configuring string layouts, it is advisable to consult the datasheet for the specific power variant (480–510 W), as the electrical parameters vary slightly across the power range.
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