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Hounen Solar HNM7-UHLDD144-570/M
Hounen Solar Brand review

HNM7-UHLDD144-570/M

570 Wp N-type Bifacial 80%
ComparePV verdict

Middle of its segment, weak in heat

Rank 5,298 of 14,005
Compare panels Datasheet PDF
Power (Wp)
570
Typical for its class
Efficiency (%)
22.07
Weak · bottom 24%
Density (Wp/m²)
220.7
Typical · median 224.5
Temp (%/°C)
-0.300
Weak · bottom 17%
Weight (kg)
31.5
Weak · 2.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The HNM7-UHLDD144 series comprises advanced solar modules built on N-Type TOPCon cells, engineered for commercial and utility-scale installations where every percentage point of energy yield matters. The applied half-cell technology with a 16-busbar layout reduces resistive losses and improves current collection, resulting in more stable panel performance even under partial shading. The double-glass, bifacial construction captures light reflected from the ground, boosting total energy production without requiring additional installation area - a solution particularly valuable for industrial rooftops and utility-scale solar farms. Thanks to its N-Type architecture, the modules feature a lower long-term degradation rate compared to traditional P-Type panels, translating into longer service life and a more predictable return on investment. The dual glass layer further enhances mechanical resistance and structural durability under demanding weather conditions. The HNM7-UHLDD144 series meets the needs of investors and system integrators seeking proven technology that meaningfully lowers LCOE and minimizes operating costs over the entire lifetime of an installation.

Ranking

259 panels in the segment N-type 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.07% 22.45% Weak · bottom 24% 6,136
Power density 220.7 224.5 Typical 6,058
Temperature coefficient -0.300 -0.290 Weak · bottom 17% 6,093
Weight per kWp 55.3 52.3 Weak · bottom 20% 9,702
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 · 5 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Hot climates, weight-limited structures and tight roof space.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 17% of the N-type 550-600 W segment, against a median of -0.290.

55.3 kg per kWp

Bottom 20% of the N-type 550-600 W segment, against a median of 52.3.

22.07% module efficiency

Bottom 24% of the N-type 550-600 W segment, against a median of 22.45%.

What owners get
N-Type TOPCon cells with 16 busbars

N-Type TOPCon technology combined with half-cut cells and a 16-busbar layout reduces resistive losses and LID degradation, delivering higher efficiency (up to 22.65%) and more stable output under partial shading than legacy P-Type PERC modules.

Efficiency matches segment leaders

Peak efficiency of 22.65% matches the best comparable N-Type series on the market (Hanersun Hitouch 5N - 22.65%, Q-SUN Qrystal N8 - 22.65%) and exceeds Risen RSM144-9 (22.6%), placing the HNM7-UHLDD144 at the top of its 565-585 Wp power class.

Bifacial dual-glass construction

Dual-glass bifacial laminate captures light reflected off the ground, boosting energy yield without increasing installation footprint, while also improving mechanical resistance to hail and snow loads.

30-year linear power warranty

The 30-year power warranty aligns with the current premium standard for bifacial N-Type TOPCon modules and matches offerings from leading manufacturers, supporting predictable long-term investment returns.

Established manufacturer with global scale

Hounen Solar has operated since 2010 and, per manufacturer data, has shipped over 320 GW of modules globally, with US-based assembly expanding since 2022 to improve service support and logistics for large commercial projects.

Trade-offs
12-year product warranty below premium segment

The product warranty is limited to 12 years, shorter than the 15-25 years now offered by many N-Type TOPCon manufacturers in this power class as of 2025-2026, which may reduce competitiveness on total cost of ownership for large-scale projects.

No confirmed BNEF Tier 1 status

Publicly available BloombergNEF Tier 1 listings (Q1 2026) do not clearly confirm Hounen Solar's inclusion, unlike competitor Hanersun, which officially communicates Tier 1 status for its 600W+ technology - a potentially significant factor for investors requiring bankable financing.

Notes from the database
  • At 22.1% efficiency, this panel is on par with typical N-type 550-600W modules
  • At 220.7 W/m², this panel generates 3.8 W/m² less per unit area than N-type 550-600W median (224.5 W/m²)
  • At -0.30%/°C, hot weather performance is typical for N-type 550-600W panels
  • At 31.5 kg, this panel is 2.0 kg heavier than the N-type 550-600W median (29.5 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) 570 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.07 % Weak Segment median 22.45%
Vmpp · Impp 42.40 V · 13.45 A Operating point at max power
Voc · Isc 51.10 V · 14.23 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 31.5 kg Weak Weak · 2.0 kg above median
Cells 144 · N-type Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 17% of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 498 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Hounen Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 570 Wp appear here. The rest cover the whole series.

Linear Performance Warranty Linear Performance Warranty Whole series I-V & P-V Curves (570W) I-V & P-V Curves (570W) 570 W P-V Curve P-V Curve 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
-0.300 %/°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
Hounen Solar HNM7-UHLDD144-570/M 570 W 22.07% -0.300 31.5 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +2.7 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +2.5 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 15 kg lighter, +2.3 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, lighter, +2.3 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg Cooler, lighter, +2.3 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg Cooler, lighter, +2.2 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg Cooler, lighter, +2.1 pp
HNM7-SHDB144-535/M 535 W 20.71% -0.350 28.0 kg Hotter, -1.4 pp, -5 yr warranty
HNM7-SHDB144-540/M 540 W 20.90% -0.350 28.0 kg Hotter, -1.2 pp, -5 yr warranty
HNM7-SHDB144-545/M 545 W 21.10% -0.350 28.0 kg Hotter, -1.0 pp, -5 yr warranty
HNM7-SHDB144-550/M 550 W 21.29% -0.350 28.0 kg Hotter, -0.8 pp, -5 yr warranty
HNM7-SHDB144-555/M 555 W 21.48% -0.350 28.0 kg Hotter, lighter, -5 yr warranty
HNM7-SHDB144-560/M 560 W 21.68% -0.350 28.0 kg Hotter, lighter, -5 yr warranty
HNM7-UHLDD144-565/M 565 W 21.87% -0.300 31.5 kg Very close match
HNM7-UHLDD144-575/M 575 W 22.26% -0.300 31.5 kg Very close match
HNM7-UHLDD144-580/M 580 W 22.45% -0.300 31.5 kg +10 W, +0.4 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +80 W, lighter, +3.1 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2547 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How much power does one HNM7-UHLDD144 series panel generate?
HNM7-UHLDD144 series modules reach up to 585 Wp maximum power. That's a high output for a panel aimed at commercial and utility-scale installations, thanks to N-type TOPCon cells and half-cell technology with 16 busbars, which reduce resistive losses and improve module efficiency.
What's the difference between N-type TOPCon technology and standard P-type panels?
N-type TOPCon cells have a lower degradation rate over time and higher initial efficiency than traditional P-type cells. In practice, this means HNM7-UHLDD144 panels lose less power over the years of operation, resulting in higher lifetime energy yield and a better return on investment.
Are HNM7-UHLDD144 panels bifacial, and is it worth it?
Yes, the series uses a dual-glass bifacial design that generates additional energy from the rear side of the module using light reflected off the ground. This is especially valuable on industrial roofs with light-colored coverings and in ground-mounted PV farms, where output can increase without expanding the installation footprint.
What warranty comes with HNM7-UHLDD144 panels?
Manufacturer Hounen Solar provides a 12-year product warranty and a 30-year power output warranty. This warranty length is typical for high-end N-type modules and reflects the manufacturer's confidence in the durability of TOPCon technology and the dual-glass construction.
Are HNM7-UHLDD144 panels suitable for industrial roofs and utility-scale PV farms?
Yes, the series is designed for commercial and utility-scale installations. High unit power up to 585 Wp, half-cell technology that limits losses from partial shading, and bifacial design make these modules well-suited for both large flat roofs and ground-mounted solar farms.
Who manufactures HNM7-UHLDD144 panels and where is the manufacturer based?
The HNM7-UHLDD144 series is manufactured by Hounen Solar, a company based in China. The manufacturer specializes in PV modules using advanced N-type TOPCon technology and bifacial designs, primarily targeting the commercial and industrial segment.
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