--- title: "Selfa SV120M.5(3)-320 Solar Panel: Specs & Datasheet | ComparePV" description: "Selfa SV120M.5(3)-320 solar panel. Specs: 19.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/selfa-sv120m-5-3-320" image: "https://comparepv.com/og/panel/selfa-sv120m-5-3-320.png" updated: 2026-09-11 --- # Selfa SV120M.5(3)-320 Middle of its segment, weak in heat 291 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Selfa - **Model:** SV120M.5(3)-320 - **Series:** SV120M.5(3) - **Rated power:** 320 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) | 320 W | 325 W | Typical | | | Module efficiency | 19.30% | 19.00% | Typical | 12,889 | | Power density | 193.2 | 190.0 | Typical | 12,869 | | Temperature coefficient | -0.390 | -0.360 | Weak - bottom 16% | 13,659 | | Weight (kg) | 18.5 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 | 19.30% | 19.00% | Typical | 12,889 | | Power density | 193.2 | 190.0 | Typical | 12,869 | | Temperature coefficient | -0.390 | -0.360 | Weak - bottom 16% | 13,659 | | Weight per kWp | 57.8 | 60.3 | Typical | 11,515 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Watch out for - **-0.390 %/°C temperature coefficient** - Bottom 16% of the PERC 300-350 W segment, against a median of -0.360. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 19.30 % - **Voltage at Pmax (Vmp):** 33.30 V - **Current at Pmax (Imp):** 9.61 A - **Open-circuit voltage (Voc):** 40.10 V - **Short-circuit current (Isc):** 10.04 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.390 %/degC - **Temperature coefficient of Voc:** -0.340 %/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:** 1670 mm - **Width:** 992 mm - **Thickness:** 35 mm - **Weight:** 18.5 kg - **Area:** 1.66 m2 - **Power density:** 193.2 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:** 257 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12889 of 14129 | | Power density | 12869 of 14129 | | Temperature coefficient | 13659 of 14129 | | Weight | 11515 of 14129 | | Warranty | 9912 of 14129 | ## About this series The SV120M.5(3) series consists of monocrystalline PV modules designed for investors who expect high reliability without compromising on price or the visual finish of their installation. The panels are built on **PERC** cells connected in a **half-cut** configuration, significantly reducing power losses caused by shading or microcracks and allowing the module to perform more stably throughout its service life. The use of **5 busbars** improves current collection from the cells and increases mechanical resistance to microdamage, resulting in fewer failures under harsh weather conditions. A key advantage of the series is **SELF-C** technology, giving the module surface self-cleaning properties that help maintain system performance with minimal maintenance, especially in locations prone to dirt and residue buildup. The modules are **PID free**, protecting against potential-induced degradation and preserving declared output over the years. The frame withstands heavy wind and snow loads, making it suitable for both sloped roofs and larger ground-mounted installations. The exclusively positive power tolerance eliminates the risk of underestimating parameters during system design. The SV120M.5(3) series is aimed at installers and investors looking for a premium Polish-made product backed by an extensive service network and a long-term manufacturer warranty. ## Notable figures - At 19.3% efficiency, this panel is on par with typical \*\*PERC 0-400W\*\* modules - Power density of 193.2 W/m² matches the \*\*PERC 0-400W\*\* median - Temperature coefficient of -0.39%/°C is 0.03pp worse than \*\*PERC 0-400W\*\* median (-0.36%/°C) - higher losses in summer heat - Weight of 18.5 kg (2.0 kg below \*\*PERC 0-400W\*\* median of 20.5 kg) allows easier transport and roof mounting - In the top 91% for efficiency among all PERC panels ## Questions ### Is the Selfa SV120M.5(3) series still available for purchase? The SV120M.5(3) series has been discontinued by Selfa and replaced by newer, higher-power models. Units may still be found through distributors clearing warehouse stock, but availability is limited and depends on local inventory. The manufacturer's warranty remains valid regardless of discontinuation, so buying from an authorized Polish distributor is still safe. ### What does the SV120M.5(3) model designation mean? The digit after the dot indicates the frame color: "5" denotes the silver-frame version, while the "3" in parentheses refers to the black-frame variant (SV120M.3). Aside from appearance, both variants share identical electrical and structural specifications, so the choice comes down to aesthetic preference relative to the roof covering or ground-mount structure. ### What warranty does the Selfa SV120M.5(3) come with, and is it reliable? Selfa provides a 12-year product warranty and a 25-year linear power output warranty. The manufacturer is headquartered in Poland with an extensive service network, making claims easier compared to panels sourced exclusively from Asia. Despite this series being discontinued, the warranty terms remain valid as originally issued for previously purchased modules. ### How do the half-cut cells with 5 busbars in the SV120M.5(3) differ from standard PERC cells? Half-cut technology splits a standard PERC cell in two, significantly reducing power loss from partial shading, such as from a leaf or chimney, compared to a full-cell module. Additionally, 5 busbars instead of the typical 3-4 improve current collection and increase mechanical resistance to microcracks, resulting in lower failure rates under large temperature swings and snow loads. ### What is Selfa's SELF-C coating, and does it actually reduce maintenance? SELF-C is a proprietary surface coating developed by Selfa that gives the module self-cleaning properties, reducing the adhesion of dust, pollen, and other deposits. In practice, this means less frequent panel washing and smaller performance drops between cleanings, which is especially noticeable in agricultural areas, near roads, or close to trees where soiling accumulates faster than on a typical urban rooftop. ### Can the actual power output of the SV120M.5(3) 335 Wp panel be lower than rated? No, this series carries a positive-only power tolerance, meaning a delivered module is never below the rated 335 Wp and may only be slightly higher. This matters for system design because it eliminates the risk of underestimating total energy yield, a concern investors face with panels rated at negative or symmetric tolerance. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/296-979023a46101.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, +4.0 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +4.0 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, +4.0 pp, +5 yr warranty | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.8 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.8 pp | | [Heckert Solar ZEUS 3.2 285WP FullBlack](https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack) | 285 W | Cooler, +3.8 pp, +5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter, +3.7 pp, +5 yr warranty | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +3.7 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | Lighter, +3.7 pp, +5 yr warranty | | [Selfa SV60M.2.1-315](https://comparepv.com/panel/selfa-sv60m-2-1-315) | 315 W | Cooler, -0.5 pp | | [Selfa SV120M.5(3)-315](https://comparepv.com/panel/selfa-sv120m-5-3-315) | 315 W | -0.3 pp | | [Selfa SV60M.2.1-320](https://comparepv.com/panel/selfa-sv60m-2-1-320) | 320 W | Cooler | | [Selfa SV60M.2.1-325](https://comparepv.com/panel/selfa-sv60m-2-1-325) | 325 W | Cooler | | [Selfa SV120M.5.0-330](https://comparepv.com/panel/selfa-sv120m-5-0-330) | 330 W | +10 W, cooler, +0.3 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +3.3 pp, +15 yr warranty | | [Lina Energy LEPV 400](https://comparepv.com/panel/lina-energy-lepv-400) | 400 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/selfa-sv120m-5-3-320 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.