--- title: "Solar-Fabrik Mono S4 Halfcut BC White 480-490W 485W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik Mono S4 Halfcut BC White 480-490W 485W solar panel. Specs: 23.75% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-480-490w" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Halfcut BC White 480-490W 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 White 480-490W - **Series:** Mono S4 Halfcut BC White - **Rated power:** 485 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) | 485 W | 475 W | Strong - top 21% | | | Module efficiency | 23.75% | 23.50% | Typical | 513 | | Power density | 237.6 | 235.2 | Typical | 495 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 25.0 kg | 23.5 kg | Weak - bottom 16% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.75% | 23.50% | Typical | 513 | | Power density | 237.6 | 235.2 | Typical | 495 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 51.5 | 48.0 | Weak - bottom 16% | 4,932 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **51.5 kg per kWp** - Bottom 16% of the Back Contact 450-500 W segment, against a median of 48.0. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 485 W - **Efficiency:** 23.75 % - **Voltage at Pmax (Vmp):** 33.61 V - **Current at Pmax (Imp):** 14.43 A - **Open-circuit voltage (Voc):** 40.64 V - **Short-circuit current (Isc):** 15.08 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:** 237.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 513 of 14005 | | Power density | 495 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 4932 of 14005 | | Warranty | 21 of 14005 | ## About this series The Solar-Fabrik Mono S4 Halfcut BC White is a sophisticated half-cut module that combines the technology of **back contact** with bifacial N-type monocrystalline solar cells in a half-cut configuration. The white grid on the rear glass gives the module an aesthetically pleasing appearance, which is particularly valued in installations on visible roof areas. Thanks to the **glass-to-glass construction**, the module exhibits exceptional fire resistance (Class A), resistance to ammonia, salt, and hail - qualifying it for Class 4 lightning protection. The **back contact** technology eliminates front busbars, which increases the active surface area of the cells and improves the overall aesthetics of the installation. The integrated **anti-shading** technology minimizes losses due to partial shading, making this module an ideal choice for complex roof geometries. The high mechanical load capacity allows for installation in areas with harsh weather conditions. The **bifaciality of N-type cells** enables additional energy generation from reflected light from the ground, increasing the annual yield of the entire installation. The entire product is completed by an impressive **30-year product warranty and a linear performance warranty**, making this series particularly attractive for long-term investments in both residential and commercial sectors. ## Notable figures - Efficiency of 23.8% matches the \*\*Back Contact 450-500W\*\* median - At 237.6 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 - At 25.0 kg (1.5 kg above \*\*Back Contact 450-500W\*\* median of 23.5 kg), requires checking roof load capacity - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### How does the back contact technology in the Solar-Fabrik Mono S4 Halfcut BC White differ from conventional solar panels? In back contact technology, all electrical conductors are routed to the rear of the cell, leaving the front glass completely free of busbars. This allows the entire front surface to absorb light, boosting efficiency and delivering a clean, uniform appearance. Combined with N-type half-cut cells, the module reaches up to 490 Wp while eliminating power losses caused by busbar shading — a key limitation of standard panels. ### Is the Solar-Fabrik Mono S4 Halfcut BC White suitable for architecturally prominent rooftop installations? Yes, the BC White series is specifically designed for installations where aesthetics matter. The white printed mesh on the rear glass creates a neat, modern look visible through the transparent back. Zero front busbars deliver a clean, uninterrupted front surface. This makes the series a popular choice for visible residential rooftops and commercial buildings with glass atriums or curtain-wall facades where panel appearance is part of the architectural concept. ### What warranty does the Solar-Fabrik Mono S4 Halfcut BC White carry and what does it cover? Solar-Fabrik provides a 30-year product warranty and a 30-year linear power output warranty — among the longest standards available on the market. As a German-headquartered manufacturer, the warranty is governed by European law. The linear degradation model means the guaranteed minimum output decreases gradually each year with no sudden drops, giving investors predictable yield protection across the full lifetime of the system. ### Will the Solar-Fabrik Mono S4 Halfcut BC White perform well under partial shading from chimneys or dormers? Yes, the built-in anti-shading technology combined with the half-cut cell layout significantly reduces power losses under partial shading. Splitting each cell in half lowers the operating current per string, so shading one section of the module does not shut down the entire circuit. This is especially valuable on complex roof geometries with chimneys, dormers, or nearby trees, where standard panels lose a disproportionate share of their output. ### What advantage does bifacial N-type technology offer in the Solar-Fabrik Mono S4 Halfcut BC White, and when does it pay off most? Bifacial N-type cells generate power from both direct irradiance and light reflected off the surface beneath the module — such as white gravel, a light-colored roofing membrane, or snow. Real-world rear-side energy gains typically range from 5 to 20 percent annually, depending on the albedo of the surroundings. The technology pays off most on flat roofs with white waterproof coatings or ground-mounted systems with light-colored aggregate beneath the array. ### How does the Solar-Fabrik Mono S4 Halfcut BC White handle harsh weather conditions — hail, snow loads, and corrosion? The BC White series uses a glass-glass construction rated at hail protection class 4, fire class A, and is certified resistant to ammonia and salt-laden coastal air. Its high mechanical load rating supports installation in regions with heavy snowfall or strong winds. The double-glass design also eliminates the long-term laminate degradation risk common in modules with polymer backsheets, improving reliability over the full 30-year service life. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/au_s4_bc_w_480-490_hc_108_de-02db979ea66d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +25 W, cooler, +1.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +10 W, lighter, +1.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +20 W, cooler, +0.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Lighter, +0.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +15 W, cooler, +0.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +15 W, lighter, +0.8 pp | | [Solar-Fabrik Mono S4 Halfcut BC Full Black 475W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-full-black-475w) | 475 W | -10 W, -0.4 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 | -0.2 pp | --- Source: https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-480-490w 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.