--- title: "YS Solar YS335SM-90 335W Solar Panel - Specs & Review | ComparePV" description: "YS Solar YS335SM-90 335W solar panel. Specs: 20.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ys-solar-ys335sm-90" updated: 2026-09-11 --- # YS Solar YS335SM-90 Middle of its segment, heavy for its output 3,392 panels in the 235-435 W band, all technologies ## Identity - **Manufacturer:** YS Solar - **Model:** YS335SM-90 - **Series:** YS SM-90 Mono 90-cell - **Rated power:** 335 W - **Cell technology:** Monocrystalline ## How it compares Compared against 235-435 W band, all technologies (3392 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 335 W | 400 W | Weak - bottom 17% | | | 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 (kg) | 24.0 kg | 21.4 kg | Weak - bottom 8% | | | Performance warranty | - | 25 yrs | | | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | | | ### Watch out for - **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. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 335 W - **Efficiency:** 20.10 % - **Voltage at Pmax (Vmp):** 25.90 V - **Current at Pmax (Imp):** 12.93 A - **Open-circuit voltage (Voc):** 30.40 V - **Short-circuit current (Isc):** 14.13 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.275 %/degC - **Temperature coefficient of Isc:** 0.053 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 90 ### Physical - **Length:** 1722 mm - **Width:** 967 mm - **Thickness:** 35 mm - **Weight:** 24.0 kg - **Area:** 1.67 m2 - **Power density:** 201.2 Wp/m2 ### Warranty and degradation ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12102 of 14005 | | Power density | 12104 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 13484 of 14005 | | Warranty | 13880 of 14005 | ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/YS330-350SM-90-32deb022e00d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +3.2 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +3.2 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.0 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.0 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -50 W, lighter, +2.9 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -35 W, lighter, +2.9 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -15 W, lighter, +2.9 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +2.9 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | +25 W, lighter, +2.9 pp | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | +45 W, lighter, +2.9 pp | | [YS Solar YS330SM-90](https://comparepv.com/panel/ys-solar-ys330sm-90) | 330 W | -0.3 pp | | [YS Solar YS340SM-90](https://comparepv.com/panel/ys-solar-ys340sm-90) | 340 W | +0.3 pp | | [YS Solar YS345SM-90](https://comparepv.com/panel/ys-solar-ys345sm-90) | 345 W | +10 W, +0.6 pp | | [YS Solar YS350SM-90](https://comparepv.com/panel/ys-solar-ys350sm-90) | 350 W | +15 W, +0.9 pp | | [Maxeon SPR-MAX3-430-R](https://comparepv.com/panel/maxeon-spr-max3-430-r) | 430 W | +95 W, cooler, +2.6 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | +65 W, cooler, +2.5 pp | --- Source: https://comparepv.com/panel/ys-solar-ys335sm-90 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.