--- title: "JA Solar JAM60D41-510/LB vs Longi Solar LR7-54HVB-480M - Solar Panel Comparison | ComparePV" description: "Compare JA Solar JAM60D41-510/LB vs Longi Solar LR7-54HVB-480M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/longi-lr7-54hvb-480m" updated: 2026-09-11 --- # JA Solar JAM60D41-510/LB vs Longi Solar LR7-54HVB-480M LR7-54HVB-480M leads on the differences that matter The largest is temperature coefficient: 0.030 %/°C better in heat. 2 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 | [JA Solar JAM60D41-510/LB](https://comparepv.com/panel/ja-solar-jam60d41-510-lb-1) | [Longi Solar LR7-54HVB-480M](https://comparepv.com/panel/longi-lr7-54hvb-480m) | | Manufacturer | JA Solar | Longi Solar | | Power | 510 Wp | 480 Wp | | Efficiency | 23.00 % | 23.50 % | | Technology | TOPCon | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | JAM60D41-510/LB | LR7-54HVB-480M | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | +0.030 %/°C for LR7-54HVB-480M | | Module efficiency | 23.00 % | 23.50 % | +0.50 pp for LR7-54HVB-480M | | Rated power | 510 Wp | 480 Wp | +30 W for JAM60D41-510/LB | | Weight | 27.3 kg | 21.6 kg | -5.7 kg for LR7-54HVB-480M | | Weight per kWp | 53.5 kg/kWp | 45.0 kg/kWp | -8.5 kg/kWp for LR7-54HVB-480M | | Module area | 2.215 m² | 2.041 m² | 0.174 m² apart | | Open-circuit voltage | 44.25 V | 40.29 V | 3.96 V apart | | Power density | 230.3 Wp/m² | 235.2 Wp/m² | +4.9 Wp/m² for LR7-54HVB-480M | | Cell technology | TOPCon | N-type | TOPCon vs N-type | | Annual degradation | 0.40 %/yr | 0.35 %/yr | -0.05 %/yr for LR7-54HVB-480M | | Voltage at max power | 37.31 V | 33.28 V | 4.03 V apart | | Cell count | 120 | 108 | 12 cells apart | | Bifacial | Yes | No | Yes vs No | | Short-circuit current | 14.54 A | 15.13 A | 0.59 A apart | | Dimensions | 1953x1134x30 mm | 1800x1134x30 mm | 1953x1134x30 mm vs 1800x1134x30 mm | | Current at max power | 13.67 A | 14.43 A | 0.76 A apart | ## Every compared parameter | Parameter | JAM60D41-510/LB | LR7-54HVB-480M | | --- | --- | --- | | Rated power | 510 Wp | 480 Wp | | Module efficiency | 23.00 % | 23.50 % | | Power density | 230.3 Wp/m² | 235.2 Wp/m² | | Open-circuit voltage | 44.25 V | 40.29 V | | Voltage at max power | 37.31 V | 33.28 V | | Short-circuit current | 14.54 A | 15.13 A | | Current at max power | 13.67 A | 14.43 A | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | | Dimensions | 1953x1134x30 mm | 1800x1134x30 mm | | Module area | 2.215 m² | 2.041 m² | | Weight | 27.3 kg | 21.6 kg | | Weight per kWp | 53.5 kg/kWp | 45.0 kg/kWp | | Product warranty | 12 yrs | - | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.35 %/yr | | Cell technology | TOPCon | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 108 | | Bifacial | Yes | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, JAM60D41-510/LB:** 17,112 kWh - **Cumulative output, LR7-54HVB-480M:** 16,230 kWh - **Gap:** 882 kWh ## Output when hot | Condition | Cell temperature | JAM60D41-510/LB | LR7-54HVB-480M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 510 W | 480 W | 100.0% of rated power | | Cool, bright day | 40 °C | 488 W | 461 W | 95.7% of rated power | | Typical summer roof | 55 °C | 466 W | 443 W | 91.3% of rated power | | Hot roof | 70 °C | 443 W | 424 W | 87.0% of rated power | ## Against the whole database | Measure | JAM60D41-510/LB | LR7-54HVB-480M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,919 | #716 | 14,005 | LR7-54HVB-480M leads by 1,203 places | | Power density | #1,849 | #718 | 14,005 | LR7-54HVB-480M leads by 1,131 places | | Heat behaviour | #2,165 | #511 | 14,005 | LR7-54HVB-480M leads by 1,654 places | | Weight | #7,509 | #598 | 14,005 | LR7-54HVB-480M leads by 6,911 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #6,280 | #9,198 | 14,005 | JAM60D41-510/LB leads by 2,918 places | ## Questions ### Which panel is better: JA Solar JAM60D41-510/LB or Longi Solar LR7-54HVB-480M? According to our database: **Longi Solar LR7-54HVB-480M** has higher module efficiency (**23.50%** vs **23.00%**); **Longi Solar LR7-54HVB-480M** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of JA Solar JAM60D41-510/LB and Longi Solar LR7-54HVB-480M? **JA Solar JAM60D41-510/LB** has a module efficiency of **23.00%**, while **Longi Solar LR7-54HVB-480M** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does JA Solar JAM60D41-510/LB use vs Longi Solar LR7-54HVB-480M? **JA Solar JAM60D41-510/LB** uses **TOPCon** cells; **Longi Solar LR7-54HVB-480M** 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 JA Solar JAM60D41-510/LB and Longi Solar LR7-54HVB-480M? **JA Solar JAM60D41-510/LB** has a **30 years** power warranty; **Longi Solar LR7-54HVB-480M** 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 JA Solar JAM60D41-510/LB and Longi Solar LR7-54HVB-480M bifacial panels? **JA Solar JAM60D41-510/LB** is bifacial (captures light from both faces); **Longi Solar LR7-54HVB-480M** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-630/LB](https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/ja-solar-jam66d45-630-lb) - 10 differences, the largest is rated power - [JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-625/LB](https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/ja-solar-jam66d45-625-lb) - 9 differences, the largest is rated power - [JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-620/LB](https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/ja-solar-jam66d45-620-lb) - 9 differences, the largest is rated power - [JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-615/LB](https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/ja-solar-jam66d45-615-lb) - 10 differences, the largest is rated power - [JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-610/LB](https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/ja-solar-jam66d45-610-lb) - 11 differences, the largest is rated power - [JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-605/LB](https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/ja-solar-jam66d45-605-lb) - 11 differences, the largest is rated power --- Source: https://comparepv.com/compare/ja-solar-jam60d41-510-lb-1/longi-lr7-54hvb-480m 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.