--- title: "Solar-Fabrik Mono S4 Halfcut BC Full Black 475W 475W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik Mono S4 Halfcut BC Full Black 475W 475W solar panel. Specs: 23.30% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-full-black-475w" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Halfcut BC Full Black 475W Middle of its segment, heavy for its output 156 panels in the segment Back Contact 450-500 W ## Identity - **Manufacturer:** Solar-Fabrik - **Model:** Mono S4 Halfcut BC Full Black 475W - **Series:** Mono S4 Halfcut BC Full Black - **Rated power:** 475 W - **Cell technology:** Back Contact - **Bifacial:** yes ## How it compares Compared against segment Back Contact 450-500 W (156 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 475 W | 475 W | Typical | | | Module efficiency | 23.30% | 23.50% | Typical | 1,017 | | Power density | 232.7 | 235.2 | Typical | 1,189 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 25.0 kg | 23.5 kg | Weak - bottom 6% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.30% | 23.50% | Typical | 1,017 | | Power density | 232.7 | 235.2 | Typical | 1,189 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 52.6 | 48.0 | Weak - bottom 6% | 6,259 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **52.6 kg per kWp** - Bottom 6% of the Back Contact 450-500 W segment, against a median of 48.0. Ranked 6,259th in the whole database. - **Best for:** Residential, commercial, shaded-installations and BIPV. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 475 W - **Efficiency:** 23.30 % - **Voltage at Pmax (Vmp):** 33.38 V - **Current at Pmax (Imp):** 14.23 A - **Open-circuit voltage (Voc):** 40.42 V - **Short-circuit current (Isc):** 14.88 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.200 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1800 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 25.0 kg - **Area:** 2.04 m2 - **Power density:** 232.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1017 of 14005 | | Power density | 1189 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 6259 of 14005 | | Warranty | 21 of 14005 | ## About this series Mono S4 Halfcut BC Full Black is a series in which **Back Contact technology** eliminates visible busbars and ribbons from the front surface, giving the entire module a uniform all-black appearance that suits virtually any roof architecture. The **n-type half-cut cells** arranged in a bifacial layout capture reflected light from the ground as well, boosting real-world energy yield without compromising the panel's clean look. A proprietary cell design with a passivation layer delivers strong **partial shading resistance**, so a single leaf, chimney, or antenna doesn't drag down the output of the entire string the way it would in conventional modules. Tempered solar glass on both sides in a **double-glass construction** increases mechanical rigidity and resistance to microcracks, salt, ammonia, and hail, making the series a solid choice for outbuildings, coastal installations, and industrial sites. A black anodized aluminum frame rounds out the seamless, premium aesthetic. It's built for investors who want long-term reliability, minimal power degradation, and a look tailored to modern, high-end rooftop or ground-mount projects. ## Notable figures - Efficiency of 23.3% matches the \*\*Back Contact 450-500W\*\* median - At 232.7 W/m² power density, roof space requirements are typical for \*\*Back Contact 450-500W\*\* panels - Temperature coefficient of -0.26%/°C matches the \*\*Back Contact 450-500W\*\* median - Weight of 25.0 kg is 1.5 kg above \*\*Back Contact 450-500W\*\* median (23.5 kg) - verify structural support - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What is Back Contact technology in the Solar-Fabrik Mono S4 Halfcut BC Full Black panels, and is it worth paying extra for? Back Contact means all electrical connections on the cell sit on its rear side, giving the front surface a uniform black look with no visible grids or ribbons. Beyond aesthetics, this design increases the cell's light-exposed active area, boosting efficiency to 23.5% and power output up to 480 Wp. The premium makes sense for visually exposed roofs or installations with limited mounting space. ### What warranty comes with Solar-Fabrik Mono S4 Halfcut BC Full Black panels? Solar-Fabrik, headquartered in Germany, provides a 30-year product warranty and a 30-year power output warranty. This is among the longest warranty coverage available on the PV market, well beyond the typical 10-12 year product warranty and 25-year power warranty offered by most competing modules, resulting in lower long-term power degradation and greater investment security. ### Do the bifacial cells in the Mono S4 BC Full Black require special mounting to work? No, the panel functions normally even in a standard sloped-roof installation, but full bifacial potential is realized with elevated mounting that leaves a gap beneath the module, such as ground-mount racking, carports, or flat roofs with a bright surface below. Under typical conditions, the rear-side gain adds roughly a few to over ten percent extra yield, depending on ground albedo and mounting height. ### Are Solar-Fabrik BC Full Black panels suitable for coastal or industrial installations exposed to salt and ammonia? Yes, the double tempered glass-glass construction with solar glass on both sides delivers high resistance to salt corrosion, ammonia vapors (common near livestock farms), and hail, backed by the manufacturer's environmental durability certifications. This makes the series a popular choice for agricultural buildings and coastal installations, where classic backsheet panels degrade faster. ### How many Mono S4 BC Full Black 480 Wp panels are needed for a typical 6-8 kWp residential system? At 480 Wp per module, a 6 kWp system needs roughly 12-13 panels, while an 8 kWp system needs about 16-17. Thanks to the high single-panel wattage and 23.5% efficiency, you can hit the target system capacity with fewer modules than standard 400-420 Wp panels, reducing the required roof area and shortening installation time. ### How do Solar-Fabrik BC Full Black panels perform in cold winter temperatures? The n-type silicon cells used in this series have a low power temperature coefficient, meaning the panel actually operates at higher efficiency in cold ambient temperatures than during summer heat, with output drops only occurring from cell overheating. The passivation layer construction also limits losses from partial shading, such as snow lingering along the module edge. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/au_s4_bc_fb_475-480_hc_108_de-adb7f7fd4380.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +35 W, cooler, +1.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +20 W, lighter, +1.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +30 W, cooler, +1.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +15 W, lighter, +1.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +25 W, cooler, +1.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +25 W, lighter, +1.2 pp | | [Solar-Fabrik Mono S4 Halfcut BC Full Black 480W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-full-black-480w) | 480 W | Very close match | | [Solar-Fabrik Mono S4 Halfcut BC White 485](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-485) | 485 W | +10 W, +0.4 pp | --- Source: https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-full-black-475w Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.