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Solar-Fabrik Brand review

S4-DG620-132TMax

620 Wp TOPCon Bifacial
ComparePV verdict

Middle of its segment, short guarantee

Rank 2,976 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.95
Typical · median 22.80%
Density (Wp/m²)
229.5
Typical · median 227.7
Temp (%/°C)
-0.300
Weak · bottom 19%
Weight (kg)
33.6
Typical · median 32.7 kg
Warranty (yrs)
25
Weak · bottom 3%

The Mono S4 Halfcut Trend White Project series from Solar-Fabrik is engineered for large-scale commercial installations and solar parks, where both energy yield and visual consistency of the array matter. The panels use N-type TOPCon half-cut cells, which reduce power losses from partial shading and deliver more stable energy output over the module's lifetime. The distinctive glass-glass construction with a white grid and transparent backsheet gives installations a clean, uniform appearance, while enabling bifacial operation that boosts energy yield without added installation costs. Modules in this series stand out with a top fire protection class A, certified by TÜV, and mechanical load resistance up to 8,100 Pa, making them well suited to demanding snow and wind conditions. A reinforced aluminum frame provides resistance to corrosion, ammonia, and salt mist, extending suitability to agricultural and coastal projects. This is a solution for investors and developers of utility-scale projects who expect German manufacturing quality, long-term reliability, and a predictable return on investment through a lower LCOE.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.95% 22.80% Typical 2,268
Power density 229.5 227.7 Typical 2,191
Temperature coefficient -0.300 -0.290 Weak · bottom 19% 6,093
Weight per kWp 54.2 53.1 Typical 8,420
Performance warranty 25 yrs 30 yrs Weak · bottom 3% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Utility-scale, commercial, shaded-installations and agrivoltaic.

Not ideal for

Owners who want a long output guarantee and hot climates.

Watch-outs
25 year performance warranty

Bottom 3% of the TOPCon 600-650 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database.

-0.300 %/°C temperature coefficient

Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290.

Notes from the database
  • At 22.9% efficiency, this panel is on par with typical TOPCon 600-650W modules
  • At 229.5 W/m² power density, roof space requirements are typical for TOPCon 600-650W panels
  • Temperature coefficient of -0.30%/°C matches the TOPCon 600-650W median
  • In the top 16% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.95 % Typical Segment median 22.80%
Vmpp · Impp 41.32 V · 15.02 A Operating point at max power
Voc · Isc 49.10 V · 15.95 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 33.6 kg Typical Typical · median 32.7 kg
Cells 132 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Weak bottom 19% of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 25 years Weak bottom 3% · median 30 yrs

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
-

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
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solar-Fabrik S4-DG620-132TMax 620 W 22.95% -0.300 33.6 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Lighter, +2.2 pp, +5 yr warranty
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Lighter, +2.1 pp, +5 yr warranty
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +1.9 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +1.9 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Lighter, +1.9 pp, +5 yr warranty
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, +1.9 pp, +5 yr warranty
S4-DG625-132TMax 625 W 23.14% -0.300 33.6 kg Very close match
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, +2.2 pp, +5 yr warranty
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, +2.1 pp, +5 yr warranty
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, +2.1 pp, +5 yr warranty
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +75 W, +1.9 pp, +5 yr warranty

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is N-TOPCon cell technology used in the Mono S4 Halfcut Trend White Project panels, and how does it differ from PERC?
N-TOPCon is a newer generation of silicon cells that, compared to the widely used PERC technology, achieves higher efficiency and lower power degradation over time. Combined with half-cut cell design, where each cell is cut in half, current losses are reduced and the module performs better under partial shading. This allows the series to reach up to 625 Wp while maintaining stable energy output over its lifetime.
Is the Mono S4 Halfcut Trend White Project suitable for large commercial installations and solar farms?
Yes, the series was specifically designed for large-scale commercial and utility PV projects. The uniform appearance created by the white grid and transparent backsheet gives a clean, consistent look across large rooftop or ground-mounted arrays, while the high per-module power of up to 625 Wp reduces the number of panels needed to reach the target system capacity, lowering mounting structure and cabling costs.
How does bifacial operation work in these panels, and how much extra energy does it produce?
The glass-glass construction with a transparent backsheet allows the module to also capture light reflected off the ground on its rear side, not just from the front. In practice, with a bright surface below (such as white gravel or snow) and adequate mounting height, the energy gain can range from a few to over ten percent compared to a monofacial module, at no additional installation cost.
What warranty comes with the Mono S4 Halfcut Trend White Project panels?
Solar-Fabrik provides a 15-year product warranty covering material and workmanship defects, plus a 25-year power output warranty guaranteeing a minimum generation level over a quarter century. This is one of the longer coverage periods on the market, consistent with German manufacturing standards, and matters when calculating long-term LCOE and return on investment for large projects.
Can these panels withstand heavy snow loads and strong wind?
Yes, modules in this series have a certified mechanical load rating of up to 8100 Pa, well above typical market requirements. This ensures safe operation in regions with heavy snowfall as well as on structures exposed to strong wind gusts, such as large industrial rooftops or open-field solar farm installations.
Are the Mono S4 Halfcut Trend White Project panels suitable for agricultural and coastal installations?
Yes, thanks to a reinforced aluminum frame, the panels resist corrosion, ammonia, and salt mist, confirmed by relevant certifications. This makes the series suitable for agrivoltaic applications, such as near livestock housing, as well as coastal installations exposed to salty air, where standard frames would corrode faster.
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