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DAH Solar Brand review

DHN-60R20/DG-505

505 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, needs the roof space

Rank 4,595 of 14,005
Compare panels Datasheet PDF
Power (Wp)
505
Typical for its class
Efficiency (%)
22.33
Weak · bottom 24%
Density (Wp/m²)
223.3
Weak · bottom 23%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
27.0
Typical · median 27.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The DAH DHN-60R20/DG series redefines performance standards thanks to the use of patented Full-Screen technology, which eliminates the problem of sediment accumulation at the frame edges. Unlike traditional modules, the flat front surface allows rainwater to flow freely along with impurities, which eliminates the risk of hot-spots and significantly reduces maintenance costs. This series is based on advanced N-type cells, which are characterized by higher efficiency and a much better temperature coefficient compared to standard P-type solutions. The use of a bifacial double-glass design makes the modules exceptionally resistant to extreme mechanical loads and corrosive factors, while simultaneously generating additional energy from reflected radiation. This is a solution dedicated to demanding rooftop and ground-mounted installations, where maintaining maximum yields without the need for frequent panel cleaning is key. Thanks to the absence of a frame rim, this series beats the competition in real-world power generation tests, especially on surfaces with a low tilt angle. Investing in these modules is a guarantee of stable system operation for decades, combining modern aesthetics with technical innovations that solve real operational problems for photovoltaic installation owners in Poland.

Ranking

432 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.33% 22.73% Weak · bottom 24% 5,054
Power density 223.3 227.4 Weak · bottom 23% 5,028
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 53.5 52.4 Typical 7,409
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
223.3 watts per square metre

Bottom 23% of the TOPCon 500-550 W segment, against a median of 227.4.

22.33% module efficiency

Bottom 24% of the TOPCon 500-550 W segment, against a median of 22.73%.

What owners get
Patented Full-Screen Technology

The frameless front surface eliminates edge sediment buildup — a genuine issue for installations in Poland, where roof pitch angles frequently range from 15–30°. This translates to lower maintenance costs and reduced hot-spot risk without investment in cleaning systems.

30-Year Linear Power Warranty

DAH guarantees power output for 30 years, while the industry standard for most manufacturers (Silfab, JA Solar, Trina) is 25 years. This is a tangible advantage when calculating LCOE for commercial and prosumer installations with a 25+ year horizon.

N-Type TOPCon — Lower LID and Better Thermal Performance

N-type cells exhibit LID degradation below 1% (vs. 1.5–2% for P-type PERC) and a typical temperature coefficient of -0.30%/°C (vs. -0.35%/°C for PERC), delivering measurably higher yield during summer months when Polish module temperatures regularly reach 60–70°C.

Bifacial Double-Glass — Durability and Additional Yield

The dual-glass construction eliminates the risk of EVA corrosion and PID degradation, while a bifaciality factor of ~80% enables an additional 5–15% yield gain in ground-mounted installations with high-albedo surfaces. Mechanical load rating: >5,400 Pa front / >2,400 Pa rear.

BNEF Tier 1 — Confirmed Bankability

DAH Solar has maintained continuous BNEF Tier 1 status throughout 2025 (confirmed for Q1 and Q4 2025), enabling access to project financing without additional collateral and reducing counterparty risk in commercial installations.

Trade-offs
Efficiency Below Segment Leaders

The series reaches a maximum efficiency of 23.0%, while direct peer comparables achieve 23.8% (HT-SAAE HT54-18X(N)) and 23.5% (TCL Zhonghuan HSM-BD60-LA). The 0.5–0.8 percentage point gap translates to approximately 3–5 cm² of additional module area per kWp — a relevant constraint for roof-mounted installations with limited available surface.

Notes from the database
  • At 22.3% efficiency, this panel is on par with typical TOPCon 500-550W modules
  • Power density of 223.3 W/m² is 4.1 W/m² below TOPCon 500-550W median (227.4 W/m²) - needs more roof space
  • Temperature coefficient of -0.29%/°C matches the TOPCon 500-550W median
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • Ranked #5054 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 505 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.33 % Weak Segment median 22.73%
Vmpp · Impp 37.30 V · 13.54 A Operating point at max power
Voc · Isc 43.90 V · 14.54 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1994×1134×30 mm · 2.26 m² of roof
Weight 27.0 kg Typical Typical · median 27.0 kg
Cells 120 · 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 441 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 505 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-60R20/DG-505 505 W 22.33% -0.290 27.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +2.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +2.4 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +50 W, cooler, +2.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +2.2 pp
DHN-60R20/DG(BB)-495W 495 W 21.89% -0.290 27.0 kg -10 W, -0.4 pp
DHN-60R18/DG-500 500 W 22.11% -0.290 27.0 kg -0.2 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +55 W, cooler, +2.5 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +45 W, lighter, +2.1 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +35 W, lighter, +2.1 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +35 W, lighter, +2.1 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +40 W, cooler, +1.9 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +40 W, cooler, +1.9 pp

Found 81 panels of the same or similar size to this one, within ±10 mm. See them here Found 94 panels of the same or similar size to this one, within ±25 mm. See them here Found 588 panels of the same or similar size to this one, within ±50 mm. See them here Found 1900 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 DAH Solar DHN-60R20/DG panels and why does it matter?
Full-Screen is a patented DAH Solar design that eliminates the front frame rail on the module. The resulting flush front surface allows rainwater to flow freely across the glass, carrying dust and contaminants with it, rather than pooling against a frame lip as it does in conventional framed panels. This translates into fewer hot-spots, higher real-world energy yields — particularly on low-tilt rooftops — and measurably lower cleaning costs over the full system lifetime.
What warranty does the DAH Solar DHN-60R20/DG series carry and what does it cover?
The DHN-60R20/DG series comes with a 25-year product warranty covering material defects and workmanship, plus a 30-year linear power output warranty. DAH Solar holds Tier 1 manufacturer status, which reflects financial stability and the practical ability to honor warranty claims. The power warranty guarantees that the module will maintain specified minimum output levels for three decades — one of the longest performance guarantees currently available on the market.
Why are the N-type TOPCon cells in the DHN-60R20/DG superior to standard PERC panels?
N-type TOPCon cells deliver higher conversion efficiency and a lower temperature coefficient (approximately -0.29 %/°C) compared to typical P-type PERC cells. In practice, this means the panel loses less power output on hot days than competing PERC-based modules. The additional TOPCon passivation layer also suppresses LID (Light-Induced Degradation), so the module continues to operate closer to its rated 520 W nameplate power over the years.
Will the DAH Solar DHN-60R20/DG panel perform well in winter and under overcast conditions?
Yes. The bifacial double-glass construction allows the module to harvest energy from both the front side and from irradiance reflected off snow or light-colored surfaces, which is particularly advantageous in winter. The low temperature coefficient of TOPCon cells means that on cold, sunny days the panel can approach its STC-rated output. The dual-glass structure also provides strong resistance to snow loads and high wind pressures.
Is the DHN-60R20/DG series suitable for a pitched roof with a low tilt angle?
Yes, and this is one of the series' most notable advantages. The absence of a front frame lip means that even at tilt angles of 5–15°, soiling does not accumulate along the module edge. Conventional framed panels create a ledge at the frame base where dirt and moss collect, reducing system efficiency over time. The DHN-60R20/DG addresses this issue at the design level, removing the need for frequent maintenance interventions.
What is the peak power output of the DHN-60R20/DG panel and how does it compare to the market?
The top variant in the series achieves 520 Wp with a module efficiency approaching approximately 23%. This places it on par with the leading premium panels available in Poland. For a typical residential system in the 6–10 kWp range, between 12 and 20 modules of this series are required. Given the compact dimensions of approximately 1,994 × 1,134 mm, this results in highly efficient use of available roof area.
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