--- title: "Solar-Fabrik Mono S4 Quartercut Premium DE Series 480W 480W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik Mono S4 Quartercut Premium DE Series 480W 480W solar panel. Specs: 24.02% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solar-fabrik-mono-s4-quartercut-premium-de-series-480w" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Quartercut Premium DE Series 480W Efficiency leader, no clear weak spot 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Solar-Fabrik - **Model:** Mono S4 Quartercut Premium DE Series 480W - **Series:** Mono S4 Quartercut Premium DE Series - **Rated power:** 480 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 480 W | 465 W | Typical | | | Module efficiency | 24.02% | 22.52% | Strong - top 1% | 294 | | Power density | 240.2 | 225.2 | Strong - top 1% | 294 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 3% | 511 | | Weight (kg) | 24.0 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.02% | 22.52% | Strong - top 1% | 294 | | Power density | 240.2 | 225.2 | Strong - top 1% | 294 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 3% | 511 | | Weight per kWp | 50.0 | 52.2 | Typical | 3,317 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **24.02% module efficiency** - Top 1% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 294th in the whole database. - **240.2 watts per square metre** - Top 1% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 294th in the whole database. - **-0.260 %/°C temperature coefficient** - Top 3% of the TOPCon 450-500 W segment, against a median of -0.290. Ranked 511th in the whole database. - **Best for:** Small roofs that need every watt, roofs where every square metre counts and hot roofs and southern climates. ## Specification ### Electrical - **Rated power (Pmax):** 480 W - **Efficiency:** 24.02 % - **Voltage at Pmax (Vmp):** 31.17 V - **Current at Pmax (Imp):** 15.40 A - **Open-circuit voltage (Voc):** 36.83 V - **Short-circuit current (Isc):** 15.98 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 41 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 192 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.0 kg - **Area:** 2.00 m2 - **Power density:** 240.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **Output after 30 years:** 426 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 294 of 14005 | | Power density | 294 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 3317 of 14005 | | Warranty | 21 of 14005 | ## About this series The Mono S4 Quartercut Premium DE series combines German manufacturing precision with the latest cell architecture, resulting in a panel suited for both residential and commercial installations. At its core are **bifacial monocrystalline N-Type TOPCon 3.0 cells**, split into four quarter-cut segments, which reduce resistive losses and help the module maintain high efficiency even under partial shading. Thanks to its dual-sided design, the panel also **captures light reflected from the ground to generate power from its rear side**, meaningfully boosting the energy yield of an installation without requiring additional roof space. The build quality is confirmed by its **top fire rating class A and hail resistance class 4**, making this panel a solid choice for sites exposed to harsh weather conditions, including heavy hail and significant snow loads. For investors focused on long-term stability, the series offers a **30-year product warranty and 30-year linear power warranty**, placing it firmly in the premium segment of PV modules on the market. A sleek, uniform black frame and production at the German Factory One further underline the aesthetic and quality-driven character of this line, built for customers who value the reliability behind the "Made in Germany" label. ## Notable figures - 24.0% module efficiency - 1.5pp better than the \*\*TOPCon 450-500W\*\* median of 22.5% - Power density of 240.2 W/m² packs 15.0 W/m² more into the same footprint vs \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - Temperature coefficient of -0.26%/°C vs median -0.29%/°C means ~1% less power loss at 65°C - In the top 2% for efficiency among all TOPCon panels ## Questions ### What is N-Type TOPCon 3.0 cell technology used in the Solar-Fabrik Mono S4 Quartercut Premium DE panels, and how does it differ from standard monocrystalline panels? TOPCon 3.0 is an N-Type cell technology featuring an additional passivation layer on the rear side of the cell, which reduces electron recombination and boosts efficiency compared to conventional P-Type PERC cells. Combined with quartercut cell division, the panel achieves higher power output with lower resistive losses and handles high temperatures and partial shading better than older technologies. ### Are Mono S4 Quartercut Premium DE panels suitable for roofs exposed to hail and heavy snow loads? Yes, the series holds the highest fire resistance class A and hail resistance class 4, meaning it withstands impacts from large hailstones without mechanical damage. The robust construction and reinforced frame also handle heavy snow loads well, making it a safe choice for installations in regions with harsh weather conditions. ### How much extra energy does the bifacial design of the Mono S4 Quartercut Premium DE panels generate? Thanks to bifacial cells, the panel also generates energy from its rear side, capturing light reflected off the roof, ground, or snow. Actual gain depends on the color and reflectivity of the mounting surface and installation height, but in practice this can mean several to over ten percent more energy output than a comparable monofacial panel, without increasing roof footprint. ### What warranty does Solar-Fabrik offer on the Mono S4 Quartercut Premium DE series, and what does it cover? The manufacturer provides a 30-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing a minimum performance level throughout the module's service life. This is one of the longest warranty periods currently available on the PV market, placing the series in the premium segment and increasing the long-term investment's security. ### How many Solar-Fabrik Mono S4 Quartercut Premium DE panels are needed for a 10 kWp installation? With a unit power of 485 Wp, roughly 21 panels are needed to reach an installation of about 10 kWp (10,000 W ÷ 485 W ≈ 20.6, rounded up to 21 units). Thanks to the high per-panel wattage, the array requires less roof space than an equivalent system built with lower-power modules, which matters when usable roof area is limited. ### Is it worth paying more for panels manufactured in Germany, like the Solar-Fabrik Mono S4 Quartercut Premium DE? Production at Solar-Fabrik's German Factory One involves strict quality control and compliance with EU standards, resulting in more consistent parameters and lower risk of factory defects compared to cheaper non-European modules. The higher purchase price is typically offset by longer service life, a solid 30/30-year warranty, and reliable access to warranty support within Europe. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/d_mono_s4_premium_series_de-bd52d28d65cb.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, +1.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +15 W, lighter, +0.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +25 W, cooler, +0.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +10 W, lighter, +0.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +20 W, cooler, +0.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +20 W, lighter, +0.5 pp | | [Solar-Fabrik Mono S4 HC V 400 BF-DG](https://comparepv.com/panel/solar-fabrik-mono-s4-hc-v-400-bf-dg) | 400 W | -80 W, hotter, -4.0 pp | | [Solar-Fabrik Mono S4 Halfcut Chroma Orange 420W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-chroma-orange-420w) | 420 W | -60 W, hotter, -3.0 pp | | [Solar-Fabrik Mono S4 Halfcut Trend Full Black 445 W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-trend-full-black-445-w) | 445 W | -35 W, hotter, -1.7 pp | | [Solar-Fabrik Mono S4 Halfcut Trend Full Black 450 W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-trend-full-black-450-w) | 450 W | -30 W, hotter, -1.5 pp | | [Solar-Fabrik Mono S4 Halfcut Trend White 455W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-trend-white-455w) | 455 W | -25 W, hotter, -1.2 pp | --- Source: https://comparepv.com/panel/solar-fabrik-mono-s4-quartercut-premium-de-series-480w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.