--- title: "Lexron 405W vs Lexron 425W - Solar Panel Comparison | ComparePV" description: "Compare Lexron 405W vs Lexron 425W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/lexron-405w/lexron-425w" updated: 2026-09-11 --- # Lexron 405W vs Lexron 425W 425W leads on the differences that matter The largest is module efficiency: 1.01 pp more efficient. 15 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Lexron 405W](https://comparepv.com/panel/lexron-405w) | [Lexron 425W](https://comparepv.com/panel/lexron-425w) | | Manufacturer | Lexron | Lexron | | Power | 405 Wp | 425 Wp | | Efficiency | 20.36 % | 21.37 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 405W | 425W | Difference | | --- | --- | --- | --- | | Module efficiency | 20.36 % | 21.37 % | +1.01 pp for 425W | | Power density | 203.6 Wp/m² | 213.7 Wp/m² | +10.1 Wp/m² for 425W | | Rated power | 405 Wp | 425 Wp | +20 W for 425W | | Weight per kWp | 54.3 kg/kWp | 51.8 kg/kWp | -2.6 kg/kWp for 425W | ## Every compared parameter | Parameter | 405W | 425W | | --- | --- | --- | | Rated power | 405 Wp | 425 Wp | | Module efficiency | 20.36 % | 21.37 % | | Power density | 203.6 Wp/m² | 213.7 Wp/m² | | Open-circuit voltage | 49.66 V | 50.38 V | | Voltage at max power | 41.38 V | 41.98 V | | Short-circuit current | 10.32 A | 10.68 A | | Current at max power | 9.79 A | 10.12 A | | Temperature coefficient | -0.350 %/°C | -0.350 %/°C | | Dimensions | 1987x1001x35 mm | 1987x1001x35 mm | | Module area | 1.989 m² | 1.989 m² | | Weight | 22.0 kg | 22.0 kg | | Weight per kWp | 54.3 kg/kWp | 51.8 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.45 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 72 | 72 | | 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 (-0.350 %/°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, 405W:** 13,337 kWh - **Cumulative output, 425W:** 13,996 kWh - **Gap:** 659 kWh ## Output when hot | Condition | Cell temperature | 405W | 425W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 405 W | 425 W | 100.0% of rated power | | Cool, bright day | 40 °C | 384 W | 403 W | 94.8% of rated power | | Typical summer roof | 55 °C | 362 W | 380 W | 89.5% of rated power | | Hot roof | 70 °C | 341 W | 358 W | 84.2% of rated power | ## Against the whole database | Measure | 405W | 425W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #11,709 | #8,448 | 14,005 | 425W leads by 3,261 places | | Power density | #11,674 | #8,404 | 14,005 | 425W leads by 3,270 places | | Heat behaviour | #10,419 | #10,419 | 14,005 | Tied - the same position in the database | | Weight | #8,586 | #5,132 | 14,005 | 425W leads by 3,454 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #11,615 | #10,571 | 14,005 | 425W leads by 1,044 places | ## Questions ### Which panel is better: Lexron 405W or Lexron 425W? According to our database: **Lexron **425 W**** has higher module efficiency (**21.37%** vs **20.36%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Lexron 405W and Lexron 425W? **Lexron **405 W**** has a module efficiency of **20.36%**, while **Lexron **425 W**** is **21.37%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Lexron 405W use vs Lexron 425W? **Lexron **405 W**** uses **PERC** cells; **Lexron **425 W**** uses **PERC**. 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 Lexron 405W and Lexron 425W? **Lexron **405 W**** has a **30 years** power warranty; **Lexron **425 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. ## Related comparisons - [Lexron 405W vs Lexron 430W](https://comparepv.com/compare/lexron-405w/lexron-430w) - 4 differences, the largest is module efficiency - [Lexron 405W vs Lexron 420W](https://comparepv.com/compare/lexron-405w/lexron-420w) - 3 differences, the largest is module efficiency - [Lexron 405W vs Lexron 415W](https://comparepv.com/compare/lexron-405w/lexron-415w) - 3 differences, the largest is module efficiency - [Lexron 405W vs Lexron 410W](https://comparepv.com/compare/lexron-405w/lexron-410w) - One difference: module efficiency - [Lexron 405W vs Lexron LEXRON 600W](https://comparepv.com/compare/lexron-405w/lexron-lexron-600w) - 14 differences, the largest is module efficiency - [Lexron 405W vs Lexron LEXRON 595W](https://comparepv.com/compare/lexron-405w/lexron-lexron-595w) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/lexron-405w/lexron-425w 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.