--- title: "JA Solar JAM54D41-445/LR vs JA Solar JAM54D41-450/LR - Solar Panel Comparison | ComparePV" description: "Compare JA Solar JAM54D41-445/LR vs JA Solar JAM54D41-450/LR 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-jam54d41-445-lr/ja-solar-jam54d41-450-lr" updated: 2026-09-11 --- # JA Solar JAM54D41-445/LR vs JA Solar JAM54D41-450/LR 450/LR leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 17 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [JA Solar JAM54D41-445/LR](https://comparepv.com/panel/ja-solar-jam54d41-445-lr) | [JA Solar JAM54D41-450/LR](https://comparepv.com/panel/ja-solar-jam54d41-450-lr) | | Manufacturer | JA Solar | JA Solar | | Power | 445 Wp | 450 Wp | | Efficiency | 22.30 % | 22.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 445/LR | 450/LR | Difference | | --- | --- | --- | --- | | Module efficiency | 22.30 % | 22.50 % | +0.20 pp for 450/LR | | Open-circuit voltage | 39.10 V | 40.30 V | 1.20 V apart | ## Every compared parameter | Parameter | 445/LR | 450/LR | | --- | --- | --- | | Rated power | 445 Wp | 450 Wp | | Module efficiency | 22.30 % | 22.50 % | | Power density | 222.7 Wp/m² | 225.2 Wp/m² | | Open-circuit voltage | 39.10 V | 40.30 V | | Voltage at max power | 32.65 V | 32.99 V | | Short-circuit current | 14.40 A | 14.41 A | | Current at max power | 13.63 A | 13.64 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 1762x1134x30 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 22.0 kg | 22.0 kg | | Weight per kWp | 49.4 kg/kWp | 48.9 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | 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 (-0.290 %/°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, 445/LR:** 14,931 kWh - **Cumulative output, 450/LR:** 15,098 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | 445/LR | 450/LR | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 445 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 426 W | 430 W | 95.7% of rated power | | Typical summer roof | 55 °C | 406 W | 411 W | 91.3% of rated power | | Hot roof | 70 °C | 387 W | 391 W | 87.0% of rated power | ## Against the whole database | Measure | 445/LR | 450/LR | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,100 | #4,222 | 14,005 | 450/LR leads by 878 places | | Power density | #5,302 | #4,225 | 14,005 | 450/LR leads by 1,077 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #2,959 | #2,563 | 14,005 | 450/LR leads by 396 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #8,801 | #8,397 | 14,005 | 450/LR leads by 404 places | ## Questions ### Which panel is better: JA Solar JAM54D41-445/LR or JA Solar JAM54D41-450/LR? According to our database: **JA Solar JAM54D41-450/LR** has higher module efficiency (**22.50%** vs **22.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of JA Solar JAM54D41-445/LR and JA Solar JAM54D41-450/LR? **JA Solar JAM54D41-445/LR** has a module efficiency of **22.30%**, while **JA Solar JAM54D41-450/LR** is **22.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does JA Solar JAM54D41-445/LR use vs JA Solar JAM54D41-450/LR? **JA Solar JAM54D41-445/LR** uses **TOPCon** cells; **JA Solar JAM54D41-450/LR** 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 JA Solar JAM54D41-445/LR and JA Solar JAM54D41-450/LR? **JA Solar JAM54D41-445/LR** has a **30 years** power warranty; **JA Solar JAM54D41-450/LR** 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 - [JA Solar JAM54D41-445/LR vs JA Solar JAM54D41-455/LR](https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam54d41-455-lr) - 4 differences, the largest is module efficiency - [JA Solar JAM54D41-445/LR vs JA Solar JAM54D41-440/LR](https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam54d41-440-lr) - One difference: module efficiency - [JA Solar JAM54D41-445/LR vs JA Solar JAM66D46-740/LB](https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam66d46-740-lb) - 14 differences, the largest is module efficiency - [JA Solar JAM54D41-445/LR vs JA Solar JAM66D46-735/LB](https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam66d46-735-lb) - 14 differences, the largest is module efficiency - [JA Solar JAM54D41-445/LR vs JA Solar JAM66D46-730/LB](https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam66d46-730-lb) - 14 differences, the largest is module efficiency - [JA Solar JAM54D41-445/LR vs JA Solar JAM66D46-725/LB](https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam66d46-725-lb) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/ja-solar-jam54d41-445-lr/ja-solar-jam54d41-450-lr 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.