--- title: "AIKO AIKO-A665-MDE72Dw vs JA Solar JAM72D40-610/LB - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A665-MDE72Dw vs JA Solar JAM72D40-610/LB side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/aiko-aiko-a665-mde72dw/ja-solar-jam72d40-610-lb" updated: 2026-09-11 --- # AIKO AIKO-A665-MDE72Dw vs JA Solar JAM72D40-610/LB AIKO-A665-MDE72Dw leads on the differences that matter The largest is module efficiency: 1.50 pp more efficient. 4 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A665-MDE72Dw](https://comparepv.com/panel/aiko-aiko-a665-mde72dw) | [JA Solar JAM72D40-610/LB](https://comparepv.com/panel/ja-solar-jam72d40-610-lb) | | Manufacturer | AIKO | JA Solar | | Power | 665 Wp | 610 Wp | | Efficiency | 24.60 % | 23.10 % | | Technology | Back Contact | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AIKO-A665-MDE72Dw | JAM72D40-610/LB | Difference | | --- | --- | --- | --- | | Module efficiency | 24.60 % | 23.10 % | +1.50 pp for AIKO-A665-MDE72Dw | | Rated power | 665 Wp | 610 Wp | +55 W for AIKO-A665-MDE72Dw | | Power density | 246.2 Wp/m² | 230.6 Wp/m² | +15.6 Wp/m² for AIKO-A665-MDE72Dw | | Temperature coefficient | -0.260 %/°C | -0.290 %/°C | +0.030 %/°C for AIKO-A665-MDE72Dw | | Product warranty | 15 yrs | 12 yrs | +3 yrs for AIKO-A665-MDE72Dw | | Module area | 2.701 m² | 2.646 m² | 0.056 m² apart | | Weight per kWp | 49.6 kg/kWp | 53.3 kg/kWp | -3.7 kg/kWp for AIKO-A665-MDE72Dw | | Cell technology | Back Contact | TOPCon | Back Contact vs TOPCon | | Annual degradation | 0.35 %/yr | 0.40 %/yr | -0.05 %/yr for AIKO-A665-MDE72Dw | | Open-circuit voltage | 54.40 V | 52.80 V | 1.60 V apart | | Bifacial | No | Yes | No vs Yes | | Short-circuit current | 15.24 A | 14.57 A | 0.67 A apart | | Dimensions | 2382x1134x30 mm | 2333x1134x30 mm | 2382x1134x30 mm vs 2333x1134x30 mm | | Current at max power | 14.59 A | 13.83 A | 0.76 A apart | | Voltage at max power | 45.60 V | 44.11 V | 1.49 V apart | ## Every compared parameter | Parameter | AIKO-A665-MDE72Dw | JAM72D40-610/LB | | --- | --- | --- | | Rated power | 665 Wp | 610 Wp | | Module efficiency | 24.60 % | 23.10 % | | Power density | 246.2 Wp/m² | 230.6 Wp/m² | | Open-circuit voltage | 54.40 V | 52.80 V | | Voltage at max power | 45.60 V | 44.11 V | | Short-circuit current | 15.24 A | 14.57 A | | Current at max power | 14.59 A | 13.83 A | | Temperature coefficient | -0.260 %/°C | -0.290 %/°C | | Dimensions | 2382x1134x30 mm | 2333x1134x30 mm | | Module area | 2.701 m² | 2.646 m² | | Weight | 33.0 kg | 32.5 kg | | Weight per kWp | 49.6 kg/kWp | 53.3 kg/kWp | | Product warranty | 15 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.40 %/yr | | Cell technology | Back Contact | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, AIKO-A665-MDE72Dw:** 22,486 kWh - **Cumulative output, JAM72D40-610/LB:** 20,467 kWh - **Gap:** 2,019 kWh ## Output when hot | Condition | Cell temperature | AIKO-A665-MDE72Dw | JAM72D40-610/LB | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 665 W | 610 W | 100.0% of rated power | | Cool, bright day | 40 °C | 639 W | 583 W | 95.7% of rated power | | Typical summer roof | 55 °C | 613 W | 557 W | 91.3% of rated power | | Hot roof | 70 °C | 587 W | 530 W | 87.0% of rated power | ## Against the whole database | Measure | AIKO-A665-MDE72Dw | JAM72D40-610/LB | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #51 | #1,570 | 14,005 | AIKO-A665-MDE72Dw leads by 1,519 places | | Power density | #42 | #1,689 | 14,005 | AIKO-A665-MDE72Dw leads by 1,647 places | | Heat behaviour | #511 | #2,165 | 14,005 | AIKO-A665-MDE72Dw leads by 1,654 places | | Weight | #3,172 | #7,135 | 14,005 | AIKO-A665-MDE72Dw leads by 3,963 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #414 | #2,742 | 14,005 | AIKO-A665-MDE72Dw leads by 2,328 places | ## Questions ### Which panel is better: AIKO AIKO-A665-MDE72Dw or JA Solar JAM72D40-610/LB? According to our database: **AIKO AIKO-A665-MDE72Dw** has higher module efficiency (**24.60%** vs **23.10%**); **AIKO AIKO-A665-MDE72Dw** 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 AIKO AIKO-A665-MDE72Dw and JA Solar JAM72D40-610/LB? **AIKO AIKO-A665-MDE72Dw** has a module efficiency of **24.60%**, while **JA Solar JAM72D40-610/LB** is **23.10%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A665-MDE72Dw use vs JA Solar JAM72D40-610/LB? **AIKO AIKO-A665-MDE72Dw** uses **Back Contact** cells; **JA Solar JAM72D40-610/LB** 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 AIKO AIKO-A665-MDE72Dw and JA Solar JAM72D40-610/LB? **AIKO AIKO-A665-MDE72Dw** has a **30 years** power warranty; **JA Solar JAM72D40-610/LB** 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 AIKO AIKO-A665-MDE72Dw and JA Solar JAM72D40-610/LB bifacial panels? **JA Solar JAM72D40-610/LB** is bifacial (captures light from both faces); **AIKO AIKO-A665-MDE72Dw** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [AIKO AIKO-A665-MDE72Dw vs AIKO AIKO-A675-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a665-mde72dw/aiko-aiko-a675-mde72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A665-MDE72Dw vs AIKO AIKO-A670-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a665-mde72dw/aiko-aiko-a670-mde72dw) - One difference: module efficiency - [AIKO AIKO-A665-MDE72Dw vs AIKO AIKO-A660-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a665-mde72dw/aiko-aiko-a660-mde72dw) - One difference: module efficiency - [AIKO AIKO-A665-MDE72Dw vs AIKO AIKO-A655-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a665-mde72dw/aiko-aiko-a655-mde72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A665-MDE72Dw vs AIKO AIKO-A650-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a665-mde72dw/aiko-aiko-a650-mde72dw) - 3 differences, the largest is module efficiency - [JA Solar JAM72D40-610/LB vs JA Solar JAM72D42-650/LB](https://comparepv.com/compare/ja-solar-jam72d40-610-lb/ja-solar-jam72d42-650-lb) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/aiko-aiko-a665-mde72dw/ja-solar-jam72d40-610-lb 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.