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DAH Solar Brand review

DHN-54R20/DG(BW)-465

465 Wp TOPCon Bifacial 80%
ComparePV verdict

Space saver, no clear weak spot

Rank 4,802 of 14,005
Compare panels Datasheet PDF
Power (Wp)
465
Typical for its class
Efficiency (%)
23.27
Strong · top 12%
Density (Wp/m²)
232.7
Strong · top 10%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
23.9
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The DAH DHN-54R20/DG(BW) series is a range of modules designed for high energy production in a limited space - thanks to n-type TOPCon cells and optimized operation at higher temperatures, the installation maintains its real efficiency for a longer period during the summer season. A key feature is the glass-glass construction, which improves resistance to moisture, saline fog, and material fatigue, resulting in more stable operation in Polish conditions. The modules are also bifacial, meaning they can utilize reflected light from bright roofs, ground, or gravel - this is a practical way to achieve additional gains without increasing the number of panels. The DG(BW) version with a black frame makes it easy to aesthetically match with modern roofs and facades.

This is a good choice for homes with limited space, businesses looking for maximum output per square meter, and for installations on flat roofs and carports, where the gains from bifacial operation can be realistically felt.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.27% 22.52% Strong · top 12% 1,202
Power density 232.7 225.2 Strong · top 10% 1,115
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 51.4 52.2 Typical 4,788
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 1 caution
Best for

Residential and commercial.

Strengths
232.7 watts per square metre

Top 10% of the TOPCon 450-500 W segment, against a median of 225.2.

23.27% module efficiency

Top 12% of the TOPCon 450-500 W segment, against a median of 22.52%.

What owners get
Premium-class efficiency: up to 23.27%

The DHN-54R20/DG(BW) series delivers module efficiency of 22.52–23.27%, while the supplied peer comparables top out at 21.48% (Jinko Solar JS182MHC120, JS Solar JS182MHC120) and 20.91% (Vikram SOMERA). This translates to 5%–11%+ higher power density per square meter — a compelling advantage on space-constrained rooftops.

Low temperature coefficient: −0.29%/°C

N-type TOPCon technology delivers a Pmax temperature coefficient of −0.29%/°C. Under Polish summer conditions, when cell temperatures exceed 65°C, power loss is approximately 20–30% lower than in PERC modules (typically −0.35 to −0.40%/°C), directly boosting energy yield during the peak generation season.

30-year power warranty at ≥87%

The manufacturer guarantees at least 87% of nominal power output after 30 years of operation. Comparable models — Jinko JS182MHC120 and Vikram SOMERA — offer standard 25-year linear warranties. DAH extends coverage by an additional 5 years, a meaningful factor in the financial modeling of both commercial and prosumer installations.

Glass-glass construction with ~80% bifaciality

The dual-glass design (2+2 mm) eliminates PID degradation risk and moisture-induced delamination, while enhancing resistance to salt fog and freezing conditions. A bifaciality factor of ~80% enables energy harvest from ground-reflected irradiance — particularly advantageous on flat-roof installations, carports, and light-colored gravel ballast systems.

BNEF Tier 1 — bankable through at least Q4 2025

DAH Solar maintained BNEF Tier 1 status throughout every quarter of 2025, including Q4 2025, following the tightened threshold of 10 MW reference projects. Bankable manufacturer status is a prerequisite for most C&I project financiers and is required to qualify for portfolio-level insurance coverage.

Trade-offs
Higher weight: 23.9 kg (glass-glass)

The dual-glass construction raises module weight to 23.9 kg — approximately 2–3 kg more than typical glass-backsheet modules in the same power class (~21 kg). On large rooftop installations on existing buildings, this may necessitate a structural load assessment and the use of dedicated racking systems certified for heavier modules.

Notes from the database
  • 23.3% module efficiency - 0.8pp better than the TOPCon 450-500W median of 22.5%
  • At 232.7 W/m² power density, this panel generates 7.5 W/m² more per unit area than TOPCon 450-500W median (225.2 W/m²)
  • Temperature coefficient of -0.29%/°C matches the TOPCon 450-500W median
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • #1202 for efficiency, #2165 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 465 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.27 % Strong Segment median 22.52%
Vmpp · Impp 34.10 V · 13.64 A Operating point at max power
Voc · Isc 40.00 V · 14.60 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 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 406 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 465 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-54R20/DG(BW)-465 465 W 23.27% -0.290 23.9 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +45 W, cooler, +1.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +30 W, cooler, +1.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +40 W, cooler, +1.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +1.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +35 W, cooler, +1.2 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +35 W, cooler, +1.2 pp
DHN-48Z16/DG(RR)-380W 380 W 19.02% -0.290 23.9 kg -85 W, -4.2 pp
DHN-48Z16/DG(RR)-385W 385 W 19.27% -0.290 23.9 kg -80 W, -4.0 pp
DHN-48Z16/DG(RR)-390W 390 W 19.52% -0.290 23.9 kg -75 W, -3.8 pp
DHN-48Z16/DG(RR)-395W 395 W 19.77% -0.290 23.9 kg -70 W, -3.5 pp
DHN-48Z16/DG(RR)-400W 400 W 20.02% -0.290 23.9 kg -65 W, -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 warranty coverage applies to the DAH Solar DHN-54R20/DG(BW) panels?
The DHN-54R20/DG(BW) series comes with a 25-year product warranty and a 30-year linear power output warranty — after 30 years, the module retains at least 87.4% of its nominal power. This is one of the longest power warranties available on the market, which is particularly significant for investments with a long-term payback horizon.
What does bifaciality mean for the DHN-54R20/DG(BW) series, and how much additional energy can be gained?
The DHN-54R20/DG(BW) modules generate power from both sides — the rear glass absorbs light reflected from the ground, rooftop surface, or surrounding environment. In a typical rooftop installation over a light-colored substrate or gravel ballast, the realistic bifacial energy gain ranges from 5% to 15% annually. The greatest benefit is achieved on flat roofs, carports, and ground-mounted systems, where the angle of incidence of reflected light is most favorable.
Are the DAH Solar DHN-54R20/DG(BW) panels suitable for a pitched roof with limited available area?
Yes. The modules measure 1762×1134×30 mm and weigh 23.9 kg, which is well within the handling capabilities of standard installation crews. With power output up to 465 Wp and efficiency exceeding 23%, they allow maximum energy yield to be extracted from every available square meter — a critical advantage on smaller rooftops where every panel counts.
How does TOPCon technology affect the performance of DHN-54R20 panels in the Polish climate?
The n-type TOPCon cells feature a temperature coefficient of Pmax of only −0.29%/°C, meaning reduced power loss during hot weather compared to older PERC modules (approximately −0.35%/°C). In practice, this translates to better energy production under Polish summer conditions. In winter, n-type technology is characterized by low dark current and strong performance under diffuse and low-irradiance light, which is common during overcast Central European conditions.
Does the glass-glass construction of the DHN-54R20/DG(BW) series matter for the long-term durability of the installation?
Yes. Instead of a conventional polymer backsheet, a second glass pane is used, which significantly reduces moisture ingress and material fatigue caused by thermal cycling and freeze-thaw stresses. The modules withstand snow loads up to 5,400 Pa and wind loads up to 2,400 Pa, enabling safe installation in regions with harsh winters and strong winds — conditions typical of Polish mountain and coastal areas.
Is DAH Solar a reputable manufacturer, and can the DHN-54R20/DG(BW) panels be trusted as a long-term investment?
DAH Solar is a Bloomberg NEF Tier 1 listed manufacturer, a designation that reflects verified financial strength and production capacity sufficient to honor warranty obligations over the long term. The company holds IEC and CE certifications, and its modules are regularly tested by independent laboratories. For customers in Poland, this is a critical consideration: a 25/30-year warranty only holds value if the issuing company remains solvent and operational throughout that period.
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