--- title: "Selfa SV120M.3.4-480 480W Solar Panel - Specs & Review | ComparePV" description: "Selfa SV120M.3.4-480 480W solar panel. Specs: 21.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/selfa-sv120m-3-4-480" updated: 2026-09-11 --- # Selfa SV120M.3.4-480 Middle of its segment, weak in heat 301 panels in the segment N-type 450-500 W ## Identity - **Manufacturer:** Selfa - **Model:** SV120M.3.4-480 - **Series:** PREMIUM - **Rated power:** 480 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 450-500 W (301 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 480 W | 470 W | Typical | | | Module efficiency | 21.70% | 22.52% | Weak - bottom 7% | 7,421 | | Power density | 216.5 | 225.2 | Weak - bottom 7% | 7,597 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 5% | 6,093 | | Weight (kg) | 23.5 kg | 23.7 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.70% | 22.52% | Weak - bottom 7% | 7,421 | | Power density | 216.5 | 225.2 | Weak - bottom 7% | 7,597 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 5% | 6,093 | | Weight per kWp | 49.0 | 49.5 | Typical | 2,641 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 5% of the N-type 450-500 W segment, against a median of -0.290. Ranked 6,093rd in the whole database. - **216.5 watts per square metre** - Bottom 7% of the N-type 450-500 W segment, against a median of 225.2. Ranked 7,597th in the whole database. - **21.70% module efficiency** - Bottom 7% of the N-type 450-500 W segment, against a median of 22.52%. Ranked 7,421st in the whole database. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 480 W - **Efficiency:** 21.70 % - **Voltage at Pmax (Vmp):** 35.91 V - **Current at Pmax (Imp):** 13.37 A - **Open-circuit voltage (Voc):** 43.20 V - **Short-circuit current (Isc):** 13.90 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 41 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 120 ### Physical - **Length:** 1955 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.5 kg - **Area:** 2.22 m2 - **Power density:** 216.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.0 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.31 % - **Output after 30 years:** 432 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7421 of 14005 | | Power density | 7597 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 2641 of 14005 | | Warranty | 21 of 14005 | ## About this series The Selfa PREMIUM photovoltaic panel series is a technologically advanced solution that combines Polish engineering with the highest standards of resistance to harsh weather conditions. These panels are based on the innovative structure of **Half-Cut cell technology**, which significantly minimizes energy losses resulting from partial shading and lowers the module's operating temperature. A key distinguishing feature of the series is the use of a unique **Self-Cleaning** coating, which actively limits the accumulation of dust and pollutants, translating into higher energy yields in the long term without the need for frequent maintenance. Unlike mass-produced modules, the PREMIUM line places special emphasis on fire safety and the mechanical strength of the frame, making it an ideal choice for **demanding prosumer installations** and large commercial projects. Users gain a real benefit in the form of **local technical support** and full resistance to potential-induced degradation (PID), which guarantees power production stability for decades. Choosing this series is a conscious investment in components with **increased resistance to extreme snow and wind loads**, which in the variable Polish climate is a key selling point, effectively distinguishing these modules from cheaper, foreign competition. ## Notable figures - Module efficiency of 21.7% is 0.8pp below average for \*\*N-type 450-500W\*\* panels (median: 22.5%) - Power density of 216.5 W/m² is 8.7 W/m² below \*\*N-type 450-500W\*\* median (225.2 W/m²) - needs more roof space - At -0.30%/°C, hot weather performance is typical for \*\*N-type 450-500W\*\* panels - In the top 53% for efficiency among all N-type panels ## Questions ### What warranty comes with the Selfa PREMIUM panels and what does it cover? The Selfa PREMIUM series carries a 20-year product warranty covering material and manufacturing defects, plus a 30-year linear power output warranty. The manufacturer guarantees that the panels will retain at least 80% of their rated power after 30 years. An added advantage is local technical support provided by a Polish manufacturer, which translates to faster warranty claims processing compared to brands operating from distant Asian markets. ### What are the benefits of the Half-Cut PERC cell technology used in Selfa PREMIUM panels? Half-cut cells are physically split in half, reducing internal resistance and lowering thermal losses. Combined with PERC technology, which reflects unused photons back into the cell for a second absorption pass, Selfa PREMIUM panels achieve higher conversion efficiency. In practice, this means better performance under partial shading, for example from a chimney or dormer window, and a lower cell operating temperature that extends the module's service life. ### Can Selfa PREMIUM 550 Wp panels handle heavy snowfall and strong winds in Polish conditions? Yes, the PREMIUM series is engineered with Poland's variable climate in mind. The manufacturer places particular emphasis on the mechanical strength of the frame, and the modules meet rigorous snow and wind load standards. This makes the panels a reliable choice for both pitched roof installations and ground-mounted systems in regions with significant snow accumulation or high wind exposure. ### What is the Self-Cleaning coating on Selfa PREMIUM panels and does it actually work? The Self-Cleaning coating is a hydrophobic treatment applied to the front glass that causes rainwater to collect dust and contaminants and carry them off the module surface. In practice, this reduces the need for manual cleaning, especially in areas with moderate rainfall. The effect is most pronounced at roof tilt angles above 15 degrees. It does not eliminate maintenance entirely, but it measurably reduces energy yield losses caused by soiling. ### What is PID resistance and why does it matter for Selfa PREMIUM panels? PID, or Potential Induced Degradation, is the gradual loss of module power caused by high system voltage, especially in high-humidity environments. Selfa PREMIUM panels are fully PID-resistant, which is critical for long-term prosumer and commercial installations. Without this protection, irreversible power losses can occur within just a few years of operation, significantly reducing the return on investment. ### Are Selfa PREMIUM panels suitable for large commercial projects or only for residential use? The PREMIUM series, with modules rated up to 550 Wp, is designed for both demanding prosumer installations and large-scale commercial projects. High per-module power output reduces the total number of modules needed, lowering balance-of-system and labor costs per MW. The elevated fire safety standards and mechanical durability make this series especially well-suited for projects with stricter technical and regulatory requirements, such as public or industrial buildings. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/532-0f060902bf3b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +30 W, cooler, +3.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +25 W, cooler, +3.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +20 W, cooler, +2.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.8 pp | | [Selfa SV120M.3.4-500](https://comparepv.com/panel/selfa-sv120m-3-4-500) | 500 W | +20 W, heavier, +0.9 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +80 W, cooler, +3.1 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +75 W, cooler, +2.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +70 W, lighter, +2.7 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +60 W, cooler, +2.7 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +60 W, cooler, +2.7 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +65 W, heavier, +2.6 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +65 W, cooler, +2.5 pp | --- Source: https://comparepv.com/panel/selfa-sv120m-3-4-480 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.