--- title: "Solar-Fabrik MS4 HC V 425 BF-DG 425W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik MS4 HC V 425 BF-DG 425W solar panel. Specs: 21.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solar-fabrik-ms4-hc-v-425-bf-dg" updated: 2026-09-11 --- # Solar-Fabrik MS4 HC V 425 BF-DG Solid all-round for its segment 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Solar-Fabrik - **Model:** MS4 HC V 425 BF-DG - **Series:** Mono S4 Halfcut \| Innovation Powerline - **Rated power:** 425 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 425 W | 435 W | Typical | | | Module efficiency | 21.80% | 22.00% | Typical | 7,022 | | Power density | 217.6 | 220.2 | Typical | 7,172 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 23.7 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.80% | 22.00% | Typical | 7,022 | | Power density | 217.6 | 220.2 | Typical | 7,172 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 55.8 | 51.4 | Typical | 10,153 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.80 % - **Voltage at Pmax (Vmp):** 32.22 V - **Current at Pmax (Imp):** 13.19 A - **Open-circuit voltage (Voc):** 37.75 V - **Short-circuit current (Isc):** 13.99 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.7 kg - **Area:** 1.95 m2 - **Power density:** 217.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 371 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7022 of 14005 | | Power density | 7172 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 10153 of 14005 | | Warranty | 21 of 14005 | ## About this series The **Mono S4 Halfcut Innovation Powerline** series from Solar-Fabrik is the answer to the growing demands of both residential and commercial installations - wherever reliability and maximum use of available roof space are paramount. At the heart of the module are **N-Type TopCon cells in halfcut technology**, which, compared to traditional PERC cells, offer a significantly lower temperature coefficient and higher efficiency in low-light conditions - which has a real impact on annual energy yields in the Polish climate. The use of **bifacial technology** allows for energy generation from both sides of the panel, which is particularly beneficial on bright surfaces or when mounted at a distance. The **glass-glass structure** provides exceptional mechanical strength and protection against moisture, extending the actual lifespan of the module. The halfcut design eliminates hot spots and allows the panel to lose significantly less power when partially shaded compared to traditional modules - **up to 50% of power can be retained even with half the surface shaded**. The entire product is covered by a 30-year manufacturer's warranty - a rarity in this price range. ## Notable figures - At 21.8% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 217.6 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 400-450W\*\* median - Weight of 23.7 kg is 1.7 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - Bifaciality factor of 87% can add 4-13% extra yield with reflective mounting surface ## Questions ### How do N-Type TOPCon cells in the Mono S4 Halfcut Innovation Powerline differ from standard PERC modules? N-Type TOPCon cells have a lower temperature coefficient than PERC, meaning they lose less power on hot days. They also perform better in low-light conditions typical of overcast fall and winter weather. In practice, this translates into higher annual energy yields from the same roof area compared to PERC modules with the same 425 Wp nameplate rating. ### Does the bifacial design of the Solar-Fabrik Mono S4 Innovation Powerline actually increase energy output? Yes, bifacial cells generate electricity from both faces of the panel by capturing light reflected off the surface below — light-colored roofing, gravel, or snow. The manufacturer indicates potential gains of up to 30% under favorable conditions. The benefit is most pronounced on elevated mounts above bright surfaces; on a typical dark roof the gain is smaller but still measurable. ### What warranty does the Solar-Fabrik Mono S4 Halfcut Innovation Powerline series carry? The series comes with a 30-year product warranty and a 30-year power output warranty, both issued directly by Solar-Fabrik, headquartered in Germany. That provides assurance backed by EU consumer law. The industry standard is typically a 10–12 year product warranty, making 30 years genuinely exceptional at this price point. ### How does the Solar-Fabrik Mono S4 Innovation Powerline 425W handle partial shading from chimneys or dormers? The half-cut cell design splits each cell into two parallel halves, significantly reducing mismatch losses under partial shading. Even when half the module surface is shaded, it retains a substantial share of its rated output. This is especially relevant on residential rooftops with chimneys, skylights, or antennas where unobstructed exposure throughout the entire day is rarely achievable. ### What are the dimensions and weight of the Mono S4 Halfcut Innovation Powerline — is it manageable to carry up to the roof? The module measures 1762 × 1134 × 30 mm and weighs approximately 24.9 kg. The glass-glass enclosure adds some weight compared to glass-backsheet modules, so a two-person crew is recommended on steep pitches. The footprint is standard for the 425 Wp class, making it compatible with most off-the-shelf racking and mounting systems. ### Why is the glass-glass enclosure on the Solar-Fabrik Mono S4 Innovation Powerline better than a standard backsheet? The glass-glass construction provides superior protection against moisture ingress, UV degradation, and mechanical stress compared to conventional glass-backsheet modules. It also offers better resistance to Potential Induced Degradation (PID), which gradually reduces module output over time. This durability is a key reason Solar-Fabrik can back the series with a full 30-year product warranty — the enclosure simply ages more slowly and maintains its seal for decades. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/d_mono_s4_ivp_425_hc_108_en-e94e168bab81.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +50 W, +2.2 pp, +10 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +40 W, lighter, +2.0 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, lighter, +2.0 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, cooler, +2.0 pp | | [Astronergy CHSM48RN(DG)/F-BH-475](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-475) | 475 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +2.0 pp | | [Solar-Fabrik S4-DG290-72APV](https://comparepv.com/panel/solar-fabrik-s4-dg290-72apv) | 290 W | -135 W, cooler, -7.0 pp | | [Solar-Fabrik S4-DG295-72APV](https://comparepv.com/panel/solar-fabrik-s4-dg295-72apv) | 295 W | -130 W, cooler, -6.7 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +2.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +75 W, cooler, +2.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +75 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/solar-fabrik-ms4-hc-v-425-bf-dg Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.