--- title: "Selfa SV120M.3.2-310 Solar Panel: Specs & Datasheet | ComparePV" description: "Selfa SV120M.3.2-310 solar panel. Specs: 17.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/selfa-sv120m-3-2-310" image: "https://comparepv.com/og/panel/selfa-sv120m-3-2-310.png" updated: 2026-09-11 --- # Selfa SV120M.3.2-310 Middle of its segment, needs the roof space 291 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Selfa - **Model:** SV120M.3.2-310 - **Series:** SV120M.3.2 - **Rated power:** 310 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 300-350 W (291 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 310 W | 325 W | Weak - bottom 18% | | | Module efficiency | 17.00% | 19.00% | Weak - bottom 16% | 13,569 | | Power density | 169.9 | 190.0 | Weak - bottom 16% | 13,570 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,425 | | Weight (kg) | 20.3 kg | 19.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 17.00% | 19.00% | Weak - bottom 16% | 13,569 | | Power density | 169.9 | 190.0 | Weak - bottom 16% | 13,570 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,425 | | Weight per kWp | 65.5 | 60.3 | Typical | 13,193 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Watch out for - **169.9 watts per square metre** - Bottom 16% of the PERC 300-350 W segment, against a median of 190.0. - **17.00% module efficiency** - Bottom 16% of the PERC 300-350 W segment, against a median of 19.00%. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 310 W - **Efficiency:** 17.00 % - **Voltage at Pmax (Vmp):** 33.10 V - **Current at Pmax (Imp):** 9.37 A - **Open-circuit voltage (Voc):** 40.20 V - **Short-circuit current (Isc):** 9.87 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.310 %/degC - **Temperature coefficient of Isc:** 0.060 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1756 mm - **Width:** 1039 mm - **Thickness:** 35 mm - **Weight:** 20.3 kg - **Area:** 1.82 m2 - **Power density:** 169.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 83.0 % - **First-year degradation:** 3.00 % - **Annual degradation:** 0.58 % - **Output after 30 years:** 249 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13569 of 14129 | | Power density | 13570 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 13193 of 14129 | | Warranty | 9912 of 14129 | ## About this series The SV120M.3.2 series consists of monocrystalline photovoltaic modules manufactured in Poland, designed for installations where both reliable performance and mounting aesthetics matter. The panels feature **half-cut cells** built on PERC technology along with a **9 busbar** layout, resulting in reduced resistive losses, better resistance to microcracks, and improved efficiency even under partial shading. The distinctive, elegant **black anodized frame** combined with tempered anti-reflective glass makes the series an excellent fit for residential roofs, where visual appeal matters just as much as energy output. An **IP68-rated** junction box with three bypass diodes ensures safe operation and resistance to moisture and dirt in demanding weather conditions. An additional advantage is the **positive power tolerance only**, giving investors confidence that the installation will reach or exceed its declared output. This makes the series a solid choice for those seeking a proven European manufacturer that combines robust build quality with a competitive price, suitable for both residential and commercial installations. ## Notable figures - Efficiency of 17.0% is 2.4pp below the \*\*PERC 0-400W\*\* median (19.4%) - At 169.9 W/m², this panel generates 24.3 W/m² less per unit area than \*\*PERC 0-400W\*\* median (194.2 W/m²) - Temperature coefficient of -0.36%/°C matches the \*\*PERC 0-400W\*\* median - #13569 for efficiency, #12425 for temperature performance out of 14129 panels ## Questions ### Is the Selfa SV120M.3.2 series still available for purchase? The SV120M.3.2 series has been discontinued by Selfa and replaced by newer models, such as the SV120M.3.3. Units may still be found at distributors selling off remaining stock, but once inventory is depleted, new purchases will no longer be possible. The manufacturer's warranty remains fully valid for panels already purchased and installed, regardless of the series being discontinued. ### What warranty comes with the Selfa SV120M.3.2 panels? The panels are covered by a 12-year product warranty against material and workmanship defects, plus a 25-year linear power output warranty. Thanks to a positive-only power tolerance from the factory, the installation performs at the rated 370 Wp or higher from day one, reducing the risk of underestimated yield during system design. ### Are SV120M.3.2 panels suitable for mounting on a sloped residential roof? Yes, with dimensions of 1756×1039×35 mm and a weight of about 20.3 kg, these panels work well on typical sloped-roof mounting structures. The sleek black anodized frame blends with roof coverings, while half-cut cells improve tolerance to partial shading from chimneys, antennas, or dormers, a common issue in residential installations. ### What do half-cut cells and 9 busbars deliver in the Selfa SV120M.3.2 panels? Half-cut cells are physically split in half, which reduces current losses and internal resistance while increasing resistance to microcracks that can form during transport and installation. The 9-busbar layout on PERC cells improves current collection across the cell surface, giving the panel around 20.3% efficiency and more stable output even under partial shading. ### Do Selfa SV120M.3.2 panels perform well in low temperatures? Yes, the module has a power temperature coefficient of -0.36%/°C, meaning a relatively small output drop as ambient temperature rises. In practice, this means that in cooler conditions, such as spring or autumn in Poland, the panel can reach output close to or above its rated 370 Wp power. ### How does the positive-only power tolerance of the Selfa SV120M.3.2 differ from typical panels? Many panels have a bidirectional power tolerance, for example ±3%, meaning the purchased module could underperform its rated power. The SV120M.3.2 has a positive-only power tolerance, so actual panel output is never below the stated 370 Wp and may be slightly higher. This gives investors confidence in the real yield of the entire installation already at the design stage. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/292-ffa62d9e15c0.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, +6.3 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +6.3 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +6.3 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +6.1 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +6.1 pp | | [Heckert Solar ZEUS 3.2 285WP FullBlack](https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack) | 285 W | Cooler, +6.1 pp, +5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter, +6.0 pp, +5 yr warranty | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | -50 W, lighter, +6.0 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | Lighter, +6.0 pp, +5 yr warranty | | [Selfa SV120M.3.2-360](https://comparepv.com/panel/tcl-zhonghuan-sv120m-3-2-360) | 360 W | +50 W, +2.7 pp | | [Selfa SV120M.2.2-360](https://comparepv.com/panel/tcl-zhonghuan-sv120m-2-2-360) | 360 W | +50 W, +2.7 pp | | [Selfa SV120M.3.2-365](https://comparepv.com/panel/tcl-zhonghuan-sv120m-3-2-365) | 365 W | +55 W, +3.0 pp | | [Selfa SV120M.3.3-370](https://comparepv.com/panel/selfa-sv120m-3-3-370) | 370 W | +60 W, +3.0 pp | | [Selfa SV120M.3.2-370](https://comparepv.com/panel/tcl-zhonghuan-sv120m-3-2-370) | 370 W | +60 W, +3.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +200 W, cooler, +8.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +185 W, cooler, +7.8 pp | --- Source: https://comparepv.com/panel/selfa-sv120m-3-2-310 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.