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Solar-Fabrik Brand review

MS4 HC V 425 BF-DG

425 Wp TOPCon Bifacial 87%
ComparePV verdict

Solid all-round for its segment

Rank 6,929 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.80
Typical · median 22.00%
Density (Wp/m²)
217.6
Typical · median 220.2
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
23.7
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

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.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall 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
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 0 caution
Best for

Residential, commercial and shaded-installations.

Notes from the database
  • 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

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.80 % Typical Segment median 22.00%
Vmpp · Impp 32.22 V · 13.19 A Operating point at max power
Voc · Isc 37.75 V · 13.99 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 23.7 kg Typical Typical · median 22.0 kg
Cells 108 · TOPCon Monocrystalline
Bifaciality 87 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 371 W guaranteed

Datasheet charts

Open datasheet PDF

Measured curves published by Solar-Fabrik in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 425 Wp appear here. The rest cover the whole series.

30-year Linear Performance Warranty for Double-Glass Solar Modules 30-year Linear Performance Warranty for Double-Glass Solar Modules Whole series Current-Voltage and Power-Voltage Curves at Varying Irradiance (200-1000 W/m²) Current-Voltage and Power-Voltage Curves at Varying Irradiance (200-1000 W/m²) Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.300 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solar-Fabrik MS4 HC V 425 BF-DG 425 W 21.80% -0.300 23.7 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, lighter, +2.0 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, lighter, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, cooler, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, cooler, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, cooler, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.0 pp
S4-DG290-72APV 290 W 14.85% -0.290 23.4 kg -135 W, cooler, -7.0 pp
S4-DG295-72APV 295 W 15.11% -0.290 23.4 kg -130 W, cooler, -6.7 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, cooler, +3.0 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +80 W, cooler, +2.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +65 W, cooler, +2.7 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +75 W, cooler, +2.7 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +75 W, cooler, +2.7 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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