--- title: "Solar-Fabrik Mono S4 Halfcut BC Series Full Black 475W 475W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik Mono S4 Halfcut BC Series Full Black 475W 475W solar panel. Specs: 23.30% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-series-full-black-475w" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Halfcut BC Series 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 Series Full Black 475W - **Series:** Mono S4 Halfcut BC Series - **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 | | | | 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 | | | | 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):** 33.40 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 ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### 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 | 13924 of 14005 | | Weight | 6259 of 14005 | | Warranty | 21 of 14005 | ## About this series The Mono S4 Halfcut BC Series is Solar-Fabrik's latest offering, combining sleek aesthetics with high energy efficiency. At the heart of this series is **Back Contact (BC) technology**, which moves the cell's conductive pathways to the rear side, resulting in a uniform, all-black module surface with no visible connectors - ideal for roofs where the appearance of the installation matters. The panels feature **busbar-free N-Type cells**, which reduce current losses and improve light capture even under diffuse sunlight conditions. Thanks to its **double-glass, bifacial construction**, the module also captures light reflected from the ground, boosting energy yield without increasing the installation's footprint - a solution for investors who want to make the most of available roof space. The series also stands out for its resistance to hail, ammonia, and salt spray, making it suitable for residential buildings as well as agricultural and industrial facilities. The manufacturer backs the modules with a **30-year warranty** on product and performance, and production takes place under a **Made in Germany** program at the new Factory One plant, ensuring short supply chains and consistently high quality. ## Notable figures - Efficiency of 23.3% matches the \*\*Back Contact 450-500W\*\* median - Power density of 232.7 W/m² matches the \*\*Back Contact 450-500W\*\* median - At 25.0 kg (1.5 kg above \*\*Back Contact 450-500W\*\* median of 23.5 kg), requires checking roof load capacity - #1017 for efficiency, #13924 for temperature performance out of 14005 panels ## Questions ### What is Back Contact (BC) technology in the Solar-Fabrik Mono S4 Halfcut panels? Back Contact is a design where all conductive pathways and soldering connections of the cell are moved to the rear side of the module. This gives the front surface a uniform black appearance with no visible busbars or interconnect ribbons. Beyond aesthetics, the technology reduces shading of the cell caused by conductive elements, improving overall energy conversion efficiency. ### Are the Mono S4 Halfcut BC panels suitable for a single-family home roof in terms of appearance? Yes, this is one of the series' main strengths. Thanks to Back Contact technology, the front side of the panel is fully black with no visible interconnections or metallic grid lines, creating a smooth, uniform surface. This look works especially well on pitched residential roofs, where aesthetics matter a lot to the investor. ### What does the bifacial, dual-glass construction of the Mono S4 Halfcut BC module provide? The bifacial design lets the panel capture sunlight not only on the front but also light reflected off the ground (such as a light-colored roof, gravel, or snow) through the rear side of the module. This allows more energy yield from the same roof area without adding more panels. It works particularly well on flat roofs and ground-mounted installations with a light-colored surface. ### What is the maximum power output and what warranty does Solar-Fabrik offer on the Mono S4 Halfcut BC series? Modules in this series reach a maximum power output of up to 490 Wp, thanks to N-Type cells without busbars that reduce current losses. The manufacturer covers the panels with a 30-year product warranty and a 30-year performance warranty, one of the longer coverage periods currently available in the PV market and a sign of the durability of the glass-glass construction. ### Are the Mono S4 Halfcut BC panels suitable for farms and industrial buildings? Yes, the series features enhanced resistance to hail, ammonia vapors, and salt mist, making it suitable for livestock buildings, barns, and coastal or industrial installations where standard modules could corrode faster. It still retains the aesthetic all-black look, so it also works well on residential roofs. ### Where are the Solar-Fabrik Mono S4 Halfcut BC panels manufactured, and does that matter for quality? The modules are made in Germany at the new Factory One plant in Hösbach near Aschaffenburg, part of Solar-Fabrik's return to domestic manufacturing. Made in Germany production means shorter supply chains, tighter quality control at every step, and lower risk of delivery delays compared to panels sourced from distant Asian markets. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/b_produkte-gesamt_de-en-c95e9992471f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +35 W, lighter, +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, lighter, +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, lighter, +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-series-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.