--- title: "Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik S4-DG625-132TMax - Solar Panel Comparison | ComparePV" description: "Compare Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik S4-DG625-132TMax 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-s4-dg620-132tmax/solar-fabrik-s4-dg625-132tmax" updated: 2026-09-11 --- # Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik S4-DG625-132TMax Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Solar-Fabrik S4-DG620-132TMax](https://comparepv.com/panel/solar-fabrik-s4-dg620-132tmax) | [Solar-Fabrik S4-DG625-132TMax](https://comparepv.com/panel/solar-fabrik-s4-dg625-132tmax) | | Manufacturer | Solar-Fabrik | Solar-Fabrik | | Power | 620 Wp | 625 Wp | | Efficiency | 22.95 % | 23.14 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | DG620-132TMax | DG625-132TMax | | --- | --- | --- | | Rated power | 620 Wp | 625 Wp | | Module efficiency | 22.95 % | 23.14 % | | Power density | 229.5 Wp/m² | 231.4 Wp/m² | | Open-circuit voltage | 49.10 V | 49.30 V | | Voltage at max power | 41.32 V | 41.52 V | | Short-circuit current | 15.95 A | 15.97 A | | Current at max power | 15.02 A | 15.07 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 33.6 kg | 33.6 kg | | Weight per kWp | 54.2 kg/kWp | 53.8 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | 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 (-0.300 %/°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, DG620-132TMax:** 20,802 kWh - **Cumulative output, DG625-132TMax:** 20,970 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | DG620-132TMax | DG625-132TMax | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 620 W | 625 W | 100.0% of rated power | | Cool, bright day | 40 °C | 592 W | 597 W | 95.5% of rated power | | Typical summer roof | 55 °C | 564 W | 569 W | 91.0% of rated power | | Hot roof | 70 °C | 536 W | 541 W | 86.5% of rated power | ## Against the whole database | Measure | DG620-132TMax | DG625-132TMax | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,268 | #1,509 | 14,005 | DG625-132TMax leads by 759 places | | Power density | #2,191 | #1,513 | 14,005 | DG625-132TMax leads by 678 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #8,420 | #7,818 | 14,005 | DG625-132TMax leads by 602 places | | Warranty | #9,798 | #9,798 | 14,005 | Tied - the same position in the database | | Overall | #2,976 | #2,619 | 14,005 | DG625-132TMax leads by 357 places | ## Questions ### Which panel is better: Solar-Fabrik S4-DG620-132TMax or Solar-Fabrik S4-DG625-132TMax? According to our database: **Solar-Fabrik S4-DG625-132TMax** has higher module efficiency (**23.14%** vs **22.95%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solar-Fabrik S4-DG620-132TMax and Solar-Fabrik S4-DG625-132TMax? **Solar-Fabrik S4-DG620-132TMax** has a module efficiency of **22.95%**, while **Solar-Fabrik S4-DG625-132TMax** is **23.14%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solar-Fabrik S4-DG620-132TMax use vs Solar-Fabrik S4-DG625-132TMax? **Solar-Fabrik S4-DG620-132TMax** uses **TOPCon** cells; **Solar-Fabrik S4-DG625-132TMax** 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 S4-DG620-132TMax and Solar-Fabrik S4-DG625-132TMax? **Solar-Fabrik S4-DG620-132TMax** has a **25 years** power warranty; **Solar-Fabrik S4-DG625-132TMax** has a **25 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 S4-DG620-132TMax and Solar-Fabrik S4-DG625-132TMax bifacial panels? Both **Solar-Fabrik S4-DG620-132TMax** and **Solar-Fabrik S4-DG625-132TMax** 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 S4-DG620-132TMax vs Solar-Fabrik Mono S4 Halfcut BC White 490](https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-mono-s4-halfcut-bc-white-490) - 15 differences, the largest is module efficiency - [Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik Mono S4 Halfcut BC Series White 490W](https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-mono-s4-halfcut-bc-series-white-490w) - 14 differences, the largest is module efficiency - [Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik Mono S4 Halfcut BC White 485](https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-mono-s4-halfcut-bc-white-485) - 16 differences, the largest is module efficiency - [Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W](https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-mono-s4-quartercut-premium-de-series-485w) - 13 differences, the largest is module efficiency - [Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik Mono S4 Halfcut BC White 480-490W](https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-mono-s4-halfcut-bc-white-480-490w) - 16 differences, the largest is module efficiency - [Solar-Fabrik S4-DG620-132TMax vs Solar-Fabrik Mono S4 Halfcut BC Series White 485W](https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-mono-s4-halfcut-bc-series-white-485w) - 15 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/solar-fabrik-s4-dg620-132tmax/solar-fabrik-s4-dg625-132tmax 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.