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YS Solar Brand review

YS335SM-90

335 Wp Monocrystalline
ComparePV verdict

Middle of its segment, heavy for its output

Rank 13,695 of 14,005
Compare panels Datasheet PDF
Power (Wp)
335
Weak · bottom 17%
Efficiency (%)
20.10
Typical · median 20.46%
Density (Wp/m²)
201.2
Typical · median 204.1
Temp (%/°C)
-0.350
Typical · median -0.340
Weight (kg)
24.0
Weak · 2.6 kg above median
Warranty (yrs)
-
Not published

YS Solar YS SM-90 Mono series photovoltaic panels utilize an advanced architecture based on 90 monocrystalline cells, which represents an optimal balance between efficiency and module dimensions. This specific design allows for high power density, which is crucial in locations with limited installation space. The use of high-efficiency monocrystalline technology guarantees excellent energy yields even in lower sunlight conditions, typical for the Polish climate zone. These modules solve the problem of challenging roof surfaces where standard, larger panels cannot be installed effectively. Thanks to the optimized cell layout, the YS SM-90 series minimizes energy losses resulting from partial shading and high operating temperatures. It is an ideal solution for single-family homeowners and off-grid systems where every square centimeter counts, along with exceptional mechanical resistance to harsh weather conditions such as strong winds or snow loads. They are distinguished from the competition by precise craftsmanship and the use of innovative materials, which significantly slow down the cell degradation process over time. By choosing these panels, investors gain the assurance of long-term energy stability and an aesthetic installation appearance that blends perfectly with modern architecture.

Ranking

3,392 panels in the 235-435 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.10% 20.46% Typical 12,102
Power density 201.2 204.1 Typical 12,104
Temperature coefficient -0.350 -0.340 Typical 10,419
Weight per kWp 71.6 55.3 Weak · bottom 8% 13,484
Performance warranty - 25 yrs Not published 13,880
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 1 caution
Not ideal for

Weight-limited structures.

Watch-outs
71.6 kg per kWp

Bottom 8% of the 235-435 W band, against a median of 55.3. Ranked 13,484th in the whole database.

Notes from the database
  • Efficiency of 20.1% is 1.7pp below the database median (21.8%)
  • At 201.2 W/m², this panel generates 16.9 W/m² less per unit area than database median (218.1 W/m²)
  • Temperature coefficient of -0.35%/°C is 0.05pp worse than database median (-0.30%/°C) - higher losses in summer heat
  • 24.0 kg weight - 2.5 kg lighter than database median (26.5 kg), reducing installation effort
  • In the top 86% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 335 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.10 % Typical Segment median 20.46%
Vmpp · Impp 25.90 V · 12.93 A Operating point at max power
Voc · Isc 30.40 V · 14.13 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×967×35 mm · 1.67 m² of roof
Weight 24.0 kg Weak Weak · 2.6 kg above median
Cells 90 Monocrystalline
Coefficient Pmax -0.350 %/°C Typical median -0.340 of its segment
Coefficient Voc · Isc -0.275 · 0.053 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient

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
-

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

Heat losses
-0.350 %/°C against a segment median of -0.340
-

Alternatives

All YS Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
YS Solar YS335SM-90 335 W 20.10% -0.350 24.0 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.2 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.2 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +3.0 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +3.0 pp
GKA182M285W 285 W 23.00% - 10.8 kg -50 W, lighter, +2.9 pp
GKA182M300W 300 W 23.00% - 16.2 kg -35 W, lighter, +2.9 pp
GKA210M320W 320 W 23.00% - 16.2 kg -15 W, lighter, +2.9 pp
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +2.9 pp
GKA210M360W 360 W 23.00% - 16.2 kg +25 W, lighter, +2.9 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +45 W, lighter, +2.9 pp
YS330SM-90 330 W 19.80% -0.350 24.0 kg -0.3 pp
YS340SM-90 340 W 20.40% -0.350 24.0 kg +0.3 pp
YS345SM-90 345 W 20.70% -0.350 24.0 kg +10 W, +0.6 pp
YS350SM-90 350 W 21.00% -0.350 24.0 kg +15 W, +0.9 pp
SPR-MAX3-430-R 430 W 22.70% -0.270 21.2 kg +95 W, cooler, +2.6 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +65 W, cooler, +2.5 pp

Found 5 panels of the same or similar size to this one, within ±10 mm. See them here Found 11 panels of the same or similar size to this one, within ±25 mm. See them here Found 171 panels of the same or similar size to this one, within ±50 mm. See them here Found 764 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the 90-cell design of the YS SM-90 differ from standard 60- or 72-cell panels?
YS SM-90 panels use 90 monocrystalline cells arranged in a narrower, more elongated format than classic 60- or 72-cell modules. This concentrates power output over a smaller module footprint, achieving higher power density while keeping dimensions easier to transport and install on irregular roof sections where standard panels don't fit efficiently.
Are YS SM-90 panels suitable for small or irregularly shaped roof sections?
Yes, that's the primary use case for this series. The optimized cell layout and compact form factor make YS SM-90 modules well-suited for narrow, fragmented, or otherwise difficult roof areas where larger 60- or 72-cell panels wouldn't fit effectively. It's a solid option for single-family homes with limited mounting surface.
What is the maximum power output of YS SM-90 panels, and is it high for this panel type?
The YS SM-90 series reaches a maximum power output of up to 350 Wp. For a module built on 90 monocrystalline cells with compact dimensions, this is a competitive result thanks to the high efficiency of monocrystalline silicon, allowing more energy to be captured per unit of available roof area compared to polycrystalline panels of similar size.
Is the YS SM-90 a bifacial panel?
No, the YS SM-90 series is a standard monofacial panel, not a bifacial module. Energy is generated only through the front side of the panel. This is typical for rooftop installations, where the rear side has no access to reflected light anyway, so bifacial technology wouldn't provide additional benefits in that setup.
Will YS SM-90 panels perform well in off-grid systems and under weaker sunlight conditions?
Yes, the high-efficiency monocrystalline technology used in the YS SM-90 delivers solid energy yields even under diffuse or weaker light conditions, typical of the Polish climate. Combined with its compact size and robust mechanical build, this panel performs well in off-grid systems where every bit of energy captured on a limited installation area matters.
YS Solar is a Chinese manufacturer — is YS SM-90 quality comparable to European brands?
YS Solar, based in China, uses advanced materials and precise manufacturing processes that help slow cell degradation over time. Many Chinese factories, including suppliers in this class, meet international quality standards and export certifications. That said, it's worth verifying the specific batch and warranty documentation with the distributor, as build quality can vary between production lines from the same manufacturer.
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