--- title: "Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-490M - Solar Panel Comparison | ComparePV" description: "Compare Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-490M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-54hvb-490m" updated: 2026-09-11 --- # Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-490M 490M leads on the differences that matter The largest is module efficiency: 0.70 pp more efficient. 15 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 | [Longi Solar LR7-54HVB-475M](https://comparepv.com/panel/longi-lr7-54hvb-475m) | [Longi Solar LR7-54HVB-490M](https://comparepv.com/panel/longi-lr7-54hvb-490m) | | Manufacturer | Longi Solar | Longi Solar | | Power | 475 Wp | 490 Wp | | Efficiency | 23.30 % | 24.00 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 475M | 490M | Difference | | --- | --- | --- | --- | | Module efficiency | 23.30 % | 24.00 % | +0.70 pp for 490M | | Power density | 232.7 Wp/m² | 240.1 Wp/m² | +7.3 Wp/m² for 490M | | Rated power | 475 Wp | 490 Wp | +15 W for 490M | ## Every compared parameter | Parameter | 475M | 490M | | --- | --- | --- | | Rated power | 475 Wp | 490 Wp | | Module efficiency | 23.30 % | 24.00 % | | Power density | 232.7 Wp/m² | 240.1 Wp/m² | | Open-circuit voltage | 40.18 V | 40.52 V | | Voltage at max power | 33.16 V | 33.51 V | | Short-circuit current | 15.03 A | 15.33 A | | Current at max power | 14.33 A | 14.63 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 1800x1134x30 mm | 1800x1134x30 mm | | Module area | 2.041 m² | 2.041 m² | | Weight | 21.6 kg | 21.6 kg | | Weight per kWp | 45.5 kg/kWp | 44.1 kg/kWp | | Product warranty | - | - | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | 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 (-0.260 %/°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, 475M:** 16,061 kWh - **Cumulative output, 490M:** 16,568 kWh - **Gap:** 507 kWh ## Output when hot | Condition | Cell temperature | 475M | 490M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 475 W | 490 W | 100.0% of rated power | | Cool, bright day | 40 °C | 456 W | 471 W | 96.1% of rated power | | Typical summer roof | 55 °C | 438 W | 452 W | 92.2% of rated power | | Hot roof | 70 °C | 419 W | 433 W | 88.3% of rated power | ## Against the whole database | Measure | 475M | 490M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,017 | #303 | 14,005 | 490M leads by 714 places | | Power density | #1,189 | #313 | 14,005 | 490M leads by 876 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #743 | #377 | 14,005 | 490M leads by 366 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,535 | #8,306 | 14,005 | 490M leads by 1,229 places | ## Questions ### Which panel is better: Longi Solar LR7-54HVB-475M or Longi Solar LR7-54HVB-490M? According to our database: **Longi Solar LR7-54HVB-490M** has higher module efficiency (**24.00%** vs **23.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Longi Solar LR7-54HVB-475M and Longi Solar LR7-54HVB-490M? **Longi Solar LR7-54HVB-475M** has a module efficiency of **23.30%**, while **Longi Solar LR7-54HVB-490M** is **24.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Longi Solar LR7-54HVB-475M use vs Longi Solar LR7-54HVB-490M? **Longi Solar LR7-54HVB-475M** uses **N-type** cells; **Longi Solar LR7-54HVB-490M** uses **N-type**. 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 Longi Solar LR7-54HVB-475M and Longi Solar LR7-54HVB-490M? **Longi Solar LR7-54HVB-475M** has a **30 years** power warranty; **Longi Solar LR7-54HVB-490M** 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 - [Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-495M](https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-54hvb-495m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-485M](https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-54hvb-485m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-54HVB-475M vs Longi Solar LR7-54HVB-480M](https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-54hvb-480m) - One difference: module efficiency - [Longi Solar LR7-54HVB-475M vs Longi Solar LR7-72HVHF-670M](https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-72hvhf-670m) - 12 differences, the largest is module efficiency - [Longi Solar LR7-54HVB-475M vs Longi Solar LR8-66HYD-670M](https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr8-66hyd-670m) - 14 differences, the largest is module efficiency - [Longi Solar LR7-54HVB-475M vs Longi Solar LR7-72HVH-670M](https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-72hvh-670m) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/longi-lr7-54hvb-475m/longi-lr7-54hvb-490m 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.