--- title: "Solar-Fabrik S4-DG620-132TMax 620W Solar Panel - Specs & Review | ComparePV" description: "Solar-Fabrik S4-DG620-132TMax 620W solar panel. Specs: 22.95% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solar-fabrik-s4-dg620-132tmax" updated: 2026-09-11 --- # Solar-Fabrik S4-DG620-132TMax Middle of its segment, short guarantee 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Solar-Fabrik - **Model:** S4-DG620-132TMax - **Series:** Mono S4 Halfcut Trend White Project - **Rated power:** 620 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 620 W | 620 W | Typical | | | 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 (kg) | 33.6 kg | 32.7 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 3% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | ### Watch out for - **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. - **Best for:** Utility-scale, commercial, shaded-installations and agrivoltaic. - **Not ideal for:** Owners who want a long output guarantee and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 620 W - **Efficiency:** 22.95 % - **Voltage at Pmax (Vmp):** 41.32 V - **Current at Pmax (Imp):** 15.02 A - **Open-circuit voltage (Voc):** 49.10 V - **Short-circuit current (Isc):** 15.95 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:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 33.6 kg - **Area:** 2.70 m2 - **Power density:** 229.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2268 of 14005 | | Power density | 2191 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 8420 of 14005 | | Warranty | 9798 of 14005 | ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/d_p_mono_s4_tw_620-625_hc_132_de-6a215cb14935.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Lighter, +2.2 pp, +5 yr warranty | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Lighter, +2.1 pp, +5 yr warranty | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +50 W, lighter, +1.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +50 W, lighter, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Lighter, +1.9 pp, +5 yr warranty | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +50 W, +1.9 pp, +5 yr warranty | | [Solar-Fabrik S4-DG625-132TMax](https://comparepv.com/panel/solar-fabrik-s4-dg625-132tmax) | 625 W | Very close match | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +60 W, +2.2 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +55 W, +2.1 pp, +5 yr warranty | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +80 W, +2.1 pp, +5 yr warranty | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +75 W, +1.9 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/solar-fabrik-s4-dg620-132tmax Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.