--- title: "Solar-Fabrik Mono S4 HC V 400 BF-DG 400W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik Mono S4 HC V 400 BF-DG 400W solar panel. Specs: 20.02% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solar-fabrik-mono-s4-hc-v-400-bf-dg" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 HC V 400 BF-DG Middle of its segment, heavy for its output 321 panels in the segment N-type 400-450 W ## Identity - **Manufacturer:** Solar-Fabrik - **Model:** Mono S4 HC V 400 BF-DG - **Series:** Mono S4 Halfcut \| Chroma Orange - **Rated power:** 400 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 400-450 W (321 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 430 W | Weak - bottom 1% | | | Module efficiency | 20.02% | 21.91% | Weak - bottom 4% | 12,182 | | Power density | 200.2 | 218.3 | Weak - bottom 4% | 12,189 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 24.0 kg | 22.0 kg | Weak - bottom 3% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.02% | 21.91% | Weak - bottom 4% | 12,182 | | Power density | 200.2 | 218.3 | Weak - bottom 4% | 12,189 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 60.0 | 51.2 | Weak - bottom 3% | 12,326 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **60.0 kg per kWp** - Bottom 3% of the N-type 400-450 W segment, against a median of 51.2. Ranked 12,326th in the whole database. - **200.2 watts per square metre** - Bottom 4% of the N-type 400-450 W segment, against a median of 218.3. Ranked 12,189th in the whole database. - **20.02% module efficiency** - Bottom 4% of the N-type 400-450 W segment, against a median of 21.91%. Ranked 12,182nd in the whole database. - **Best for:** Residential, shaded-installations and BIPV. - **Not ideal for:** Weight-limited structures, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.02 % - **Voltage at Pmax (Vmp):** 30.48 V - **Current at Pmax (Imp):** 13.13 A - **Open-circuit voltage (Voc):** 35.36 V - **Short-circuit current (Isc):** 13.60 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 96 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.0 kg - **Area:** 2.00 m2 - **Power density:** 200.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 350 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12182 of 14005 | | Power density | 12189 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 12326 of 14005 | | Warranty | 21 of 14005 | ## About this series The **Solar-Fabrik Mono S4 Halfcut \| Chroma Orange** series represents a groundbreaking solution for aesthetically integrating photovoltaic systems with traditional architecture. Thanks to the **front glass tinted in a shade similar to RAL 8004 (copper brown),** the modules seamlessly blend into roofs covered with red or terracotta tiles - without compromising on aesthetics. This solution is primarily designed for **historic buildings and those protected by conservation regulations**, where standard black panels would be aesthetically unacceptable. The **half-cut cell technology** reduces resistive losses and minimizes the impact of partial shading on the overall performance of the system. The **double-glazed construction** provides exceptional mechanical strength, airtightness, and a significant fire safety advantage - the glass does not support combustion, which is particularly important in buildings protected by conservation regulations. The matte, anti-reflective coating of the glass reduces glare, and the aluminum frame in RAL 8011 color complements the overall warm color scheme of the module. The **30-year product and performance warranty** confirms the longevity of this investment. The panel is intended for architects, developers, and owners of prestigious properties who prioritize both aesthetics and energy efficiency. ## Notable figures - Module efficiency of 20.0% is 1.9pp below average for \*\*N-type 400-450W\*\* panels (median: 21.9%) - Power density of 200.2 W/m² is 18.1 W/m² below \*\*N-type 400-450W\*\* median (218.3 W/m²) - needs more roof space - At -0.29%/°C, hot weather performance is typical for \*\*N-type 400-450W\*\* panels - At 24.0 kg, this panel is 2.0 kg heavier than the \*\*N-type 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Ranked #12182 out of 14005 panels for efficiency in the database ## Questions ### Can the Solar-Fabrik Mono S4 Halfcut Chroma Orange be installed on a heritage or conservation-protected building? Yes, this series was specifically designed for such applications. The colored front glass in a shade close to RAL 8004 (copper brown) allows modules to blend visually with roofs covered in red or terracotta tiles. The all-glass construction does not support combustion (fire class A, TÜV-certified), which is often a mandatory condition for obtaining heritage authority approval. It is one of the few PV modules on the market that simultaneously meets both aesthetic and fire-safety requirements for listed buildings. ### What is the warranty on Solar-Fabrik Mono S4 Halfcut Chroma Orange panels? The manufacturer offers a 30-year product warranty and a 30-year linear performance warranty. Throughout that period, the module must retain specified power output parameters, and any manufacturing defects are covered by repair or replacement. A dual 30-year warranty is rare in the market and significantly improves the investment's financial case. Solar-Fabrik is headquartered in Germany, which simplifies warranty claims for customers across Europe. ### What does N-type TOPCon technology mean in the Chroma Orange panels, and why is it better than older PERC cells? N-type TOPCon (Tunnel Oxide Passivated Contact) cells degrade more slowly over time and perform better under low-light conditions compared to older PERC technology. The temperature coefficient is just -0.29%/°C, meaning the panel loses less power on hot days than typical modules. In the Chroma Orange series, 96 half-cut TOPCon cells achieve 20.02% efficiency at 400 Wp. This translates to a real advantage in climates with frequent overcast days and diffuse irradiance. ### How do the Solar-Fabrik Chroma Orange panels perform under partial shading — for example from a chimney or dormer window? The half-cut cell design means that shading one part of the module does not block the other half's output, so power losses under partial shading are significantly lower than in standard full-cell modules. N-type TOPCon technology further reduces the PID (Potential Induced Degradation) effect and improves performance under diffuse light. This is especially important on heritage building rooftops, where chimneys and decorative architectural elements frequently cast shadows. ### How much does the Solar-Fabrik Mono S4 Halfcut Chroma Orange weigh, and is installation on an older roof problematic? The panel weighs approximately 24 kg with dimensions of 1,762 × 1,134 × 30 mm. The glass-glass construction makes it heavier than a typical polymer-backsheet module, requiring a robust roof structure and at least two installers. Before mounting, it is advisable to have the roof's load-bearing capacity assessed, especially on older heritage buildings. The high resistance to snow loads (up to 5,400 Pa) and hail (Class 4 per IEC) fully offsets the additional weight. ### Is the Solar-Fabrik Chroma Orange a bifacial module, and what does that mean in practice? Yes, the Chroma Orange is a bifacial module, meaning the rear glass also generates electricity from reflected light. In practice, with a light-colored surface beneath (pale roofing, concrete, gravel), energy yield can exceed the nameplate 400 Wp by several percent. The bifacial gain depends on the albedo of the surface below the array, so the benefit is greatest with lighter substrates — whether on a rooftop or a ground-mounted installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/d_mono_s4_chroma_400_en-7f6fe3f2ceb1.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +40 W, cooler, +3.1 pp | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, lighter, +3.0 pp | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, +3.0 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, hotter, +3.0 pp | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, lighter, +3.0 pp | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, +3.0 pp | | [Solar-Fabrik Mono S4 Halfcut Chroma Orange 420W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-chroma-orange-420w) | 420 W | +20 W, +1.0 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 | +45 W, +2.3 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 | +50 W, +2.5 pp | | [Solar-Fabrik Mono S4 Halfcut Trend White 455W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-trend-white-455w) | 455 W | +55 W, hotter, +2.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, cooler, +5.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, lighter, +4.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, cooler, +4.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, lighter, +4.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, cooler, +4.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +100 W, cooler, +4.5 pp | --- Source: https://comparepv.com/panel/solar-fabrik-mono-s4-hc-v-400-bf-dg Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.