--- title: "Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik S4-DG455-96TMax (White) - Solar Panel Comparison | ComparePV" description: "Compare Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik S4-DG455-96TMax (White) side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-s4-dg455-96tmax-white" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik S4-DG455-96TMax (White) Mono S4 Halfcut BC White 490 leads on the differences that matter The largest is module efficiency: 1.20 pp more efficient. 5 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Solar-Fabrik Mono S4 Halfcut BC White 490](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-490) | [Solar-Fabrik S4-DG455-96TMax (White)](https://comparepv.com/panel/solar-fabrik-s4-dg455-96tmax-white) | | Manufacturer | Solar-Fabrik | Solar-Fabrik | | Power | 490 Wp | 455 Wp | | Efficiency | 24.00 % | 22.80 % | | Technology | Back Contact | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Mono S4 Halfcut BC White 490 | S4-DG455-96TMax (White) | Difference | | --- | --- | --- | --- | | Module efficiency | 24.00 % | 22.80 % | +1.20 pp for Mono S4 Halfcut BC White 490 | | Power density | 240.1 Wp/m² | 227.7 Wp/m² | +12.3 Wp/m² for Mono S4 Halfcut BC White 490 | | Temperature coefficient | -0.260 %/°C | -0.290 %/°C | +0.030 %/°C for Mono S4 Halfcut BC White 490 | | Rated power | 490 Wp | 455 Wp | +35 W for Mono S4 Halfcut BC White 490 | | Open-circuit voltage | 40.75 V | 36.21 V | 4.54 V apart | | Weight per kWp | 51.0 kg/kWp | 54.7 kg/kWp | -3.7 kg/kWp for Mono S4 Halfcut BC White 490 | | Cell technology | Back Contact | TOPCon | Back Contact vs TOPCon | | Module area | 2.041 m² | 1.998 m² | 0.043 m² apart | | Cell count | 108 | 96 | 12 cells apart | | Voltage at max power | 33.72 V | 30.28 V | 3.44 V apart | | Short-circuit current | 15.18 A | 15.75 A | 0.57 A apart | | Dimensions | 1800x1134x30 mm | 1762x1134x30 mm | 1800x1134x30 mm vs 1762x1134x30 mm | | Current at max power | 14.53 A | 15.03 A | 0.50 A apart | ## Every compared parameter | Parameter | Mono S4 Halfcut BC White 490 | S4-DG455-96TMax (White) | | --- | --- | --- | | Rated power | 490 Wp | 455 Wp | | Module efficiency | 24.00 % | 22.80 % | | Power density | 240.1 Wp/m² | 227.7 Wp/m² | | Open-circuit voltage | 40.75 V | 36.21 V | | Voltage at max power | 33.72 V | 30.28 V | | Short-circuit current | 15.18 A | 15.75 A | | Current at max power | 14.53 A | 15.03 A | | Temperature coefficient | -0.260 %/°C | -0.290 %/°C | | Dimensions | 1800x1134x30 mm | 1762x1134x30 mm | | Module area | 2.041 m² | 1.998 m² | | Weight | 25.0 kg | 24.9 kg | | Weight per kWp | 51.0 kg/kWp | 54.7 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | Back Contact | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 96 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year - **Cumulative output, Mono S4 Halfcut BC White 490:** 16,440 kWh - **Cumulative output, S4-DG455-96TMax (White):** 15,266 kWh - **Gap:** 1,174 kWh ## Output when hot | Condition | Cell temperature | Mono S4 Halfcut BC White 490 | S4-DG455-96TMax (White) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 490 W | 455 W | 100.0% of rated power | | Cool, bright day | 40 °C | 471 W | 435 W | 95.7% of rated power | | Typical summer roof | 55 °C | 452 W | 415 W | 91.3% of rated power | | Hot roof | 70 °C | 433 W | 396 W | 87.0% of rated power | ## Against the whole database | Measure | Mono S4 Halfcut BC White 490 | S4-DG455-96TMax (White) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #303 | #2,714 | 14,005 | Mono S4 Halfcut BC White 490 leads by 2,411 places | | Power density | #313 | #2,888 | 14,005 | Mono S4 Halfcut BC White 490 leads by 2,575 places | | Heat behaviour | #511 | #2,165 | 14,005 | Mono S4 Halfcut BC White 490 leads by 1,654 places | | Weight | #4,360 | #9,129 | 14,005 | Mono S4 Halfcut BC White 490 leads by 4,769 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,188 | #4,712 | 14,005 | Mono S4 Halfcut BC White 490 leads by 2,524 places | ## Questions ### Which panel is better: Solar-Fabrik Mono S4 Halfcut BC White 490 or Solar-Fabrik S4-DG455-96TMax (White)? According to our database: **Solar-Fabrik Mono S4 Halfcut BC White 490** has higher module efficiency (**24.00%** vs **22.80%**); **Solar-Fabrik Mono S4 Halfcut BC White 490** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solar-Fabrik Mono S4 Halfcut BC White 490 and Solar-Fabrik S4-DG455-96TMax (White)? **Solar-Fabrik Mono S4 Halfcut BC White 490** has a module efficiency of **24.00%**, while **Solar-Fabrik S4-DG455-96TMax (White)** is **22.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solar-Fabrik Mono S4 Halfcut BC White 490 use vs Solar-Fabrik S4-DG455-96TMax (White)? **Solar-Fabrik Mono S4 Halfcut BC White 490** uses **Back Contact** cells; **Solar-Fabrik S4-DG455-96TMax (White)** uses **TOPCon**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Solar-Fabrik Mono S4 Halfcut BC White 490 and Solar-Fabrik S4-DG455-96TMax (White)? **Solar-Fabrik Mono S4 Halfcut BC White 490** has a **30 years** power warranty; **Solar-Fabrik S4-DG455-96TMax (White)** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are Solar-Fabrik Mono S4 Halfcut BC White 490 and Solar-Fabrik S4-DG455-96TMax (White) bifacial panels? Both **Solar-Fabrik Mono S4 Halfcut BC White 490** and **Solar-Fabrik S4-DG455-96TMax (White)** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC Series White 490W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-mono-s4-halfcut-bc-series-white-490w) - The same specification on paper - [Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC White 485](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-mono-s4-halfcut-bc-white-485) - One difference: module efficiency - [Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC White 480-490W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-mono-s4-halfcut-bc-white-480-490w) - One difference: module efficiency - [Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC Series White 485W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-mono-s4-halfcut-bc-series-white-485w) - One difference: module efficiency - [Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC White 480](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-mono-s4-halfcut-bc-white-480) - 3 differences, the largest is module efficiency - [Solar-Fabrik S4-DG455-96TMax (White) vs Solar-Fabrik S4-DG460-96TMax (Full Black)](https://comparepv.com/compare/solar-fabrik-s4-dg455-96tmax-white/solar-fabrik-s4-dg460-96tmax-full-black) - One difference: module efficiency --- Source: https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-490/solar-fabrik-s4-dg455-96tmax-white Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.