--- title: "JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-575/LB/1500V - Solar Panel Comparison | ComparePV" description: "Compare JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-575/LB/1500V 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-jam72d30-555-lb-1500v/ja-solar-jam72d30-575-lb-1500v" updated: 2026-09-11 --- # JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-575/LB/1500V 575/LB/1500V leads on the differences that matter The largest is module efficiency: 0.70 pp more efficient. 15 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [JA Solar JAM72D30-555/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-555-lb-1500v) | [JA Solar JAM72D30-575/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-575-lb-1500v) | | Manufacturer | JA Solar | JA Solar | | Power | 555 Wp | 575 Wp | | Efficiency | 21.00 % | 21.70 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 555/LB/1500V | 575/LB/1500V | Difference | | --- | --- | --- | --- | | Module efficiency | 21.00 % | 21.70 % | +0.70 pp for 575/LB/1500V | | Power density | 209.8 Wp/m² | 217.3 Wp/m² | +7.6 Wp/m² for 575/LB/1500V | | Rated power | 555 Wp | 575 Wp | +20 W for 575/LB/1500V | | Weight per kWp | 58.6 kg/kWp | 56.5 kg/kWp | -2.0 kg/kWp for 575/LB/1500V | ## Every compared parameter | Parameter | 555/LB/1500V | 575/LB/1500V | | --- | --- | --- | | Rated power | 555 Wp | 575 Wp | | Module efficiency | 21.00 % | 21.70 % | | Power density | 209.8 Wp/m² | 217.3 Wp/m² | | Open-circuit voltage | 50.14 V | 50.86 V | | Voltage at max power | 41.29 V | 42.05 V | | Short-circuit current | 14.19 A | 14.44 A | | Current at max power | 13.44 A | 13.67 A | | Temperature coefficient | -0.350 %/°C | -0.350 %/°C | | Dimensions | 2333x1134x30 mm | 2333x1134x30 mm | | Module area | 2.646 m² | 2.646 m² | | Weight | 32.5 kg | 32.5 kg | | Weight per kWp | 58.6 kg/kWp | 56.5 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 | 144 | 144 | | Bifacial | Yes | Yes | ## 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, 555/LB/1500V:** 18,277 kWh - **Cumulative output, 575/LB/1500V:** 18,935 kWh - **Gap:** 658 kWh ## Output when hot | Condition | Cell temperature | 555/LB/1500V | 575/LB/1500V | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 555 W | 575 W | 100.0% of rated power | | Cool, bright day | 40 °C | 526 W | 545 W | 94.8% of rated power | | Typical summer roof | 55 °C | 497 W | 515 W | 89.5% of rated power | | Hot roof | 70 °C | 468 W | 484 W | 84.2% of rated power | ## Against the whole database | Measure | 555/LB/1500V | 575/LB/1500V | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #9,758 | #7,421 | 14,005 | 575/LB/1500V leads by 2,337 places | | Power density | #9,904 | #7,324 | 14,005 | 575/LB/1500V leads by 2,580 places | | Heat behaviour | #10,419 | #10,419 | 14,005 | Tied - the same position in the database | | Weight | #11,787 | #10,695 | 14,005 | 575/LB/1500V leads by 1,092 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #7,209 | #5,574 | 14,005 | 575/LB/1500V leads by 1,635 places | ## Questions ### Which panel is better: JA Solar JAM72D30-555/LB/1500V or JA Solar JAM72D30-575/LB/1500V? According to our database: **JA Solar JAM72D30-575/LB/1500V** has higher module efficiency (**21.70%** vs **21.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of JA Solar JAM72D30-555/LB/1500V and JA Solar JAM72D30-575/LB/1500V? **JA Solar JAM72D30-555/LB/1500V** has a module efficiency of **21.00%**, while **JA Solar JAM72D30-575/LB/1500V** is **21.70%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does JA Solar JAM72D30-555/LB/1500V use vs JA Solar JAM72D30-575/LB/1500V? **JA Solar JAM72D30-555/LB/1500V** uses **PERC** cells; **JA Solar JAM72D30-575/LB/1500V** 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 JA Solar JAM72D30-555/LB/1500V and JA Solar JAM72D30-575/LB/1500V? **JA Solar JAM72D30-555/LB/1500V** has a **30 years** power warranty; **JA Solar JAM72D30-575/LB/1500V** 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 JAM72D30-555/LB/1500V and JA Solar JAM72D30-575/LB/1500V bifacial panels? Both **JA Solar JAM72D30-555/LB/1500V** and **JA Solar JAM72D30-575/LB/1500V** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-580/LB/1500V](https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam72d30-580-lb-1500v) - 4 differences, the largest is module efficiency - [JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-570/LB/1500V](https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam72d30-570-lb-1500v) - 3 differences, the largest is module efficiency - [JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-565/LB/1500V](https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam72d30-565-lb-1500v) - 3 differences, the largest is module efficiency - [JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM72D30-560/LB/1500V](https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam72d30-560-lb-1500v) - One difference: module efficiency - [JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM66D46-740/LB](https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam66d46-740-lb) - 13 differences, the largest is module efficiency - [JA Solar JAM72D30-555/LB/1500V vs JA Solar JAM66D46-735/LB](https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam66d46-735-lb) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/ja-solar-jam72d30-555-lb-1500v/ja-solar-jam72d30-575-lb-1500v 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.