--- title: "Selfa SV120M.3.3-370 370W Solar Panel - Specs & Review | ComparePV" description: "Selfa SV120M.3.3-370 370W solar panel. Specs: 20.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/selfa-sv120m-3-3-370" updated: 2026-09-11 --- # Selfa SV120M.3.3-370 Solid all-round for its segment 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Selfa - **Model:** SV120M.3.3-370 - **Series:** Slim - **Rated power:** 370 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 370 W | 380 W | Typical | | | Module efficiency | 20.00% | 19.90% | Typical | 12,214 | | Power density | 200.0 | 199.0 | Typical | 12,227 | | Temperature coefficient | -0.360 | -0.350 | Typical | 12,345 | | Weight (kg) | 20.0 kg | 21.4 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.00% | 19.90% | Typical | 12,214 | | Power density | 200.0 | 199.0 | Typical | 12,227 | | Temperature coefficient | -0.360 | -0.350 | Typical | 12,345 | | Weight per kWp | 54.1 | 55.8 | Typical | 8,267 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | - **Best for:** Residential and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 370 W - **Efficiency:** 20.00 % - **Voltage at Pmax (Vmp):** 34.10 V - **Current at Pmax (Imp):** 10.86 A - **Open-circuit voltage (Voc):** 41.30 V - **Short-circuit current (Isc):** 11.37 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.060 %/degC - **NOCT:** 41 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1765 mm - **Width:** 1048 mm - **Thickness:** 30 mm - **Weight:** 20.0 kg - **Area:** 1.85 m2 - **Power density:** 200.0 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:** 297 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12214 of 14005 | | Power density | 12227 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 8267 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Selfa Slim solar panel series sets new standards in combining high efficiency with modern structural design. These modules utilize advanced **N-type cell** technology and half-cut architecture, which significantly reduces energy losses and improves efficiency under lower sunlight conditions. A characteristic feature is the **reduced frame thickness**, which not only results in a lower weight for the entire system, making transport and installation easier, but above all gives the installation a slim, elegant look. This is an ideal solution for investors looking for a compromise between extreme mechanical strength and roof aesthetics. Unlike standard, massive modules, the Slim series from the Polish manufacturer offers **increased resistance to the PID effect** and excellent heat dissipation, which directly translates into a longer cell lifespan. These panels are primarily dedicated to modern residential construction and demanding prosumer installations, where every centimeter of surface area and impeccable appearance count. Choosing this series guarantees stability thanks to **local technical support** and technology optimized for Polish weather conditions. This solves the problem of excessive load on roof structures while maintaining the highest energy yield parameters per square meter. ## Notable figures - Efficiency of 20.0% is 0.6pp above the \*\*PERC 0-400W\*\* median (19.4%) - Power density of 200.0 W/m² packs 5.6 W/m² more into the same footprint vs \*\*PERC 0-400W\*\* median (194.4 W/m²) - At -0.36%/°C, hot weather performance is typical for \*\*PERC 0-400W\*\* panels - In the top 87% for efficiency among all PERC panels ## Questions ### Is the Selfa Slim series still available for purchase? The Selfa Slim series has been discontinued and is no longer available as a new product through regular distribution channels. If you are interested, you may still find remaining stock at some distributors. For a new installation, it is worth asking your reseller about a current Selfa replacement with comparable specifications and aesthetics. ### What warranty does the Selfa Slim solar panel come with? Selfa provides a 12-year product warranty on the Slim series, covering material and manufacturing defects. In addition, a 25-year linear power output warranty guarantees that the panels retain a specified efficiency level throughout that period. These are standard prosumer-grade terms, giving confidence in the long-term performance of your system. ### What is the maximum power output of the Selfa Slim panel and is it enough for a typical household? The Selfa Slim reaches a peak output of up to 370 Wp per panel. For an average household consuming around 3,500–4,500 kWh per year, a system of 8–12 modules (roughly 3–4.4 kWp) is typically sufficient. The exact number of panels should be calculated by a certified installer based on roof orientation and tilt angle. ### What does PERC technology mean in the Selfa Slim and what advantage does the half-cut cell architecture provide? PERC (Passivated Emitter and Rear Cell) adds a passivation layer to the rear of each cell, recovering photons that would otherwise be lost and boosting module efficiency. The half-cut cell architecture reduces internal resistance and limits power loss under partial shading from chimneys or dormers. Together, these features deliver higher energy yield, especially during morning and evening hours. ### Why does the Selfa Slim have a slimmer frame and what does that mean for rooftop installation? The reduced frame thickness is an intentional design choice that lowers the module weight and decreases the load on the roof structure. Lighter panels are easier to carry up to the roof and faster to mount, reducing installer labor time. The slim profile also delivers a sleek, low-profile look on the roof, a key consideration for homeowners who prioritize aesthetics. ### Do Selfa Slim panels perform well in low-light conditions and Poland's climate? Yes, the Slim series was optimized for Polish weather conditions, where overcast days and diffuse irradiance are common. PERC half-cut technology improves output at low sun angles and under partial cloud cover. Enhanced PID resistance and efficient heat dissipation further protect the cells from degradation caused by Poland's variable temperature swings. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/344-84ea80b2f29c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.1 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.1 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -50 W, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +30 W, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +30 W, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +3.0 pp, +5 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.6 pp, +15 yr warranty | | [Selfa SV120M.3.2-310](https://comparepv.com/panel/selfa-sv120m-3-2-310) | 310 W | -60 W, -3.0 pp | | [Selfa SV120M.3.2-360](https://comparepv.com/panel/tcl-zhonghuan-sv120m-3-2-360) | 360 W | -10 W, -0.3 pp | | [Selfa SV120M.2.2-360](https://comparepv.com/panel/tcl-zhonghuan-sv120m-2-2-360) | 360 W | -10 W, -0.3 pp | | [Selfa SV120M.3.2-365](https://comparepv.com/panel/tcl-zhonghuan-sv120m-3-2-365) | 365 W | Very close match | | [Selfa SV120M.3.2-370](https://comparepv.com/panel/tcl-zhonghuan-sv120m-3-2-370) | 370 W | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +140 W, cooler, +5.0 pp | --- Source: https://comparepv.com/panel/selfa-sv120m-3-3-370 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.