--- title: "Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W - Solar Panel Comparison | ComparePV" description: "Compare Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W 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-485/solar-fabrik-mono-s4-quartercut-premium-de-series-475w" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W 10 differences, and they point both ways The largest is open-circuit voltage: 4.06 V apart. 8 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 485](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-485) | [Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W](https://comparepv.com/panel/solar-fabrik-mono-s4-quartercut-premium-de-series-475w) | | Manufacturer | Solar-Fabrik | Solar-Fabrik | | Power | 485 Wp | 475 Wp | | Efficiency | 23.75 % | 23.77 % | | Technology | Back Contact | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Halfcut BC White 485 | Quartercut Premium DE Series 475W | Difference | | --- | --- | --- | --- | | Open-circuit voltage | 40.64 V | 36.58 V | 4.06 V apart | | Cell technology | Back Contact | TOPCon | Back Contact vs TOPCon | | Module area | 2.041 m² | 1.998 m² | 0.043 m² apart | | Rated power | 485 Wp | 475 Wp | +10 W for Halfcut BC White 485 | | Cell count | 108 | 192 | 84 cells apart | | Short-circuit current | 15.08 A | 15.93 A | 0.85 A apart | | Weight | 25.0 kg | 24.0 kg | -1.0 kg for Quartercut Premium DE Series 475W | | Voltage at max power | 33.61 V | 31.05 V | 2.56 V apart | | Dimensions | 1800x1134x30 mm | 1762x1134x30 mm | 1800x1134x30 mm vs 1762x1134x30 mm | | Current at max power | 14.43 A | 15.30 A | 0.87 A apart | ## Every compared parameter | Parameter | Halfcut BC White 485 | Quartercut Premium DE Series 475W | | --- | --- | --- | | Rated power | 485 Wp | 475 Wp | | Module efficiency | 23.75 % | 23.77 % | | Power density | 237.6 Wp/m² | 237.7 Wp/m² | | Open-circuit voltage | 40.64 V | 36.58 V | | Voltage at max power | 33.61 V | 31.05 V | | Short-circuit current | 15.08 A | 15.93 A | | Current at max power | 14.43 A | 15.30 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 1800x1134x30 mm | 1762x1134x30 mm | | Module area | 2.041 m² | 1.998 m² | | Weight | 25.0 kg | 24.0 kg | | Weight per kWp | 51.5 kg/kWp | 50.5 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 | 192 | | 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 Same temp coeff. for both panels (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, Halfcut BC White 485:** 16,273 kWh - **Cumulative output, Quartercut Premium DE Series 475W:** 15,937 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | Halfcut BC White 485 | Quartercut Premium DE Series 475W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 485 W | 475 W | 100.0% of rated power | | Cool, bright day | 40 °C | 466 W | 456 W | 96.1% of rated power | | Typical summer roof | 55 °C | 447 W | 438 W | 92.2% of rated power | | Hot roof | 70 °C | 428 W | 419 W | 88.3% of rated power | ## Against the whole database | Measure | Halfcut BC White 485 | Quartercut Premium DE Series 475W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #513 | #499 | 14,005 | Quartercut Premium DE Series 475W leads by 14 places | | Power density | #495 | #467 | 14,005 | Quartercut Premium DE Series 475W leads by 28 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #4,932 | #3,892 | 14,005 | Quartercut Premium DE Series 475W leads by 1,040 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,601 | #2,861 | 14,005 | Halfcut BC White 485 leads by 260 places | ## Questions ### Which panel is better: Solar-Fabrik Mono S4 Halfcut BC White 485 or Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W? According to our database: **Solar-Fabrik Mono S4 Quartercut Premium DE Series **475 W**** has higher module efficiency (**23.77%** vs **23.75%**). 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 485 and Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W? **Solar-Fabrik Mono S4 Halfcut BC White 485** has a module efficiency of **23.75%**, while **Solar-Fabrik Mono S4 Quartercut Premium DE Series **475 W**** is **23.77%**. 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 485 use vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W? **Solar-Fabrik Mono S4 Halfcut BC White 485** uses **Back Contact** cells; **Solar-Fabrik Mono S4 Quartercut Premium DE Series **475 W**** 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 485 and Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W? **Solar-Fabrik Mono S4 Halfcut BC White 485** has a **30 years** power warranty; **Solar-Fabrik Mono S4 Quartercut Premium DE Series **475 W**** 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 485 and Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W bifacial panels? Both **Solar-Fabrik Mono S4 Halfcut BC White 485** and **Solar-Fabrik Mono S4 Quartercut Premium DE Series **475 W**** 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 485 vs Solar-Fabrik Mono S4 Halfcut BC White 490](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-485/solar-fabrik-mono-s4-halfcut-bc-white-490) - One difference: module efficiency - [Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Halfcut BC Series White 490W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-485/solar-fabrik-mono-s4-halfcut-bc-series-white-490w) - One difference: module efficiency - [Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Halfcut BC White 480-490W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-485/solar-fabrik-mono-s4-halfcut-bc-white-480-490w) - The same specification on paper - [Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Halfcut BC Series White 485W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-485/solar-fabrik-mono-s4-halfcut-bc-series-white-485w) - The same specification on paper - [Solar-Fabrik Mono S4 Halfcut BC White 485 vs Solar-Fabrik Mono S4 Halfcut BC White 480](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-485/solar-fabrik-mono-s4-halfcut-bc-white-480) - One difference: module efficiency - [Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W](https://comparepv.com/compare/solar-fabrik-mono-s4-quartercut-premium-de-series-475w/solar-fabrik-mono-s4-quartercut-premium-de-series-485w) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-bc-white-485/solar-fabrik-mono-s4-quartercut-premium-de-series-475w 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.