--- title: "Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-425-R - Solar Panel Comparison | ComparePV" description: "Compare Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-425-R side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-425-r" updated: 2026-09-11 --- # Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-425-R 400-COM leads on the differences that matter The largest is rated power: 25 W more power. 8 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | [Maxeon SPR-MAX3-425-R](https://comparepv.com/panel/maxeon-spr-max3-425-r) | | Manufacturer | Maxeon | Maxeon | | Power | 400 Wp | 425 Wp | | Efficiency | 22.60 % | 22.40 % | | Technology | Back Contact | Back Contact | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 400-COM | 425-R | Difference | | --- | --- | --- | --- | | Rated power | 400 Wp | 425 Wp | +25 W for 425-R | | Open-circuit voltage | 75.40 V | 40.70 V | 34.70 V apart | | Short-circuit current | 6.57 A | 13.13 A | 6.56 A apart | | Module area | 1.768 m² | 1.895 m² | 0.128 m² apart | | Weight | 19.0 kg | 21.2 kg | -2.2 kg for 400-COM | | Module efficiency | 22.60 % | 22.40 % | +0.20 pp for 400-COM | | Voltage at max power | 66.00 V | 34.90 V | 31.10 V apart | | Current at max power | 6.07 A | 12.18 A | 6.11 A apart | | Cell count | 104 | 112 | 8 cells apart | | Weight per kWp | 47.5 kg/kWp | 49.9 kg/kWp | -2.4 kg/kWp for 400-COM | | Dimensions | 1690x1046x40 mm | 1812x1046x40 mm | 1690x1046x40 mm vs 1812x1046x40 mm | ## Every compared parameter | Parameter | 400-COM | 425-R | | --- | --- | --- | | Rated power | 400 Wp | 425 Wp | | Module efficiency | 22.60 % | 22.40 % | | Power density | 226.3 Wp/m² | 224.2 Wp/m² | | Open-circuit voltage | 75.40 V | 40.70 V | | Voltage at max power | 66.00 V | 34.90 V | | Short-circuit current | 6.57 A | 13.13 A | | Current at max power | 6.07 A | 12.18 A | | Temperature coefficient | -0.270 %/°C | -0.270 %/°C | | Dimensions | 1690x1046x40 mm | 1812x1046x40 mm | | Module area | 1.768 m² | 1.895 m² | | Weight | 19.0 kg | 21.2 kg | | Weight per kWp | 47.5 kg/kWp | 49.9 kg/kWp | | Product warranty | 40 yrs | 40 yrs | | Performance warranty | 40 yrs | 40 yrs | | Annual degradation | 0.25 %/yr | 0.25 %/yr | | Cell technology | Back Contact | Back Contact | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 104 | 112 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.270 %/°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, 400-COM:** 13,590 kWh - **Cumulative output, 425-R:** 14,439 kWh - **Gap:** 849 kWh ## Output when hot | Condition | Cell temperature | 400-COM | 425-R | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 400 W | 425 W | 100.0% of rated power | | Cool, bright day | 40 °C | 384 W | 408 W | 96.0% of rated power | | Typical summer roof | 55 °C | 368 W | 391 W | 91.9% of rated power | | Hot roof | 70 °C | 351 W | 373 W | 87.8% of rated power | ## Against the whole database | Measure | 400-COM | 425-R | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,658 | #4,774 | 14,005 | 400-COM leads by 1,116 places | | Power density | #3,671 | #4,759 | 14,005 | 400-COM leads by 1,088 places | | Heat behaviour | #1,280 | #1,280 | 14,005 | Tied - the same position in the database | | Weight | #1,726 | #3,266 | 14,005 | 400-COM leads by 1,540 places | | Warranty | #1 | #1 | 14,005 | Tied - the same position in the database | | Overall | #2,534 | #2,122 | 14,005 | 425-R leads by 412 places | ## Questions ### Which panel is better: Maxeon SPR-MAX3-400-COM or Maxeon SPR-MAX3-425-R? According to our database: **Maxeon SPR-MAX3-400-COM** has higher module efficiency (**22.60%** vs **22.40%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Maxeon SPR-MAX3-400-COM and Maxeon SPR-MAX3-425-R? **Maxeon SPR-MAX3-400-COM** has a module efficiency of **22.60%**, while **Maxeon SPR-MAX3-425-R** is **22.40%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Maxeon SPR-MAX3-400-COM use vs Maxeon SPR-MAX3-425-R? **Maxeon SPR-MAX3-400-COM** uses **Back Contact** cells; **Maxeon SPR-MAX3-425-R** uses **Back Contact**. 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 Maxeon SPR-MAX3-400-COM and Maxeon SPR-MAX3-425-R? **Maxeon SPR-MAX3-400-COM** has a **40 years** power warranty; **Maxeon SPR-MAX3-425-R** has a **40 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. ## Related comparisons - [Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-430-R](https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-430-r) - 9 differences, the largest is rated power - [Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-415-R](https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-415-r) - 12 differences, the largest is module efficiency - [Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-390-COM](https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-390-com) - 4 differences, the largest is module efficiency - [Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-380-COM](https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-380-com) - 5 differences, the largest is module efficiency - [Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-375-BLK](https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-375-blk) - 5 differences, the largest is module efficiency - [Maxeon SPR-MAX3-400-COM vs Maxeon SPR-MAX3-370-COM](https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-370-com) - 7 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/maxeon-spr-max3-400-com/maxeon-spr-max3-425-r 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.