--- title: "AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A685-MAE78Dw - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A685-MAE78Dw 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-a675-mae78dw/aiko-aiko-a685-mae78dw" updated: 2026-09-11 --- # AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A685-MAE78Dw A685-MAE78Dw leads on the differences that matter The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A675-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a675-mae78dw) | [AIKO AIKO-A685-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a685-mae78dw) | | Manufacturer | AIKO | AIKO | | Power | 675 Wp | 685 Wp | | Efficiency | 24.10 % | 24.50 % | | Technology | Back Contact | Back Contact | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | A675-MAE78Dw | A685-MAE78Dw | Difference | | --- | --- | --- | --- | | Module efficiency | 24.10 % | 24.50 % | +0.40 pp for A685-MAE78Dw | | Power density | 241.5 Wp/m² | 245.1 Wp/m² | +3.6 Wp/m² for A685-MAE78Dw | | Rated power | 675 Wp | 685 Wp | +10 W for A685-MAE78Dw | ## Every compared parameter | Parameter | A675-MAE78Dw | A685-MAE78Dw | | --- | --- | --- | | Rated power | 675 Wp | 685 Wp | | Module efficiency | 24.10 % | 24.50 % | | Power density | 241.5 Wp/m² | 245.1 Wp/m² | | Open-circuit voltage | 58.98 V | 59.10 V | | Voltage at max power | 48.85 V | 48.97 V | | Short-circuit current | 14.49 A | 14.63 A | | Current at max power | 13.82 A | 13.99 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2465x1134x30 mm | 2465x1134x30 mm | | Module area | 2.795 m² | 2.795 m² | | Weight | 34.5 kg | 34.5 kg | | Weight per kWp | 51.1 kg/kWp | 50.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | Back Contact | Back Contact | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 156 | | 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, A675-MAE78Dw:** 22,824 kWh - **Cumulative output, A685-MAE78Dw:** 23,162 kWh - **Gap:** 338 kWh ## Output when hot | Condition | Cell temperature | A675-MAE78Dw | A685-MAE78Dw | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 675 W | 685 W | 100.0% of rated power | | Cool, bright day | 40 °C | 649 W | 658 W | 96.1% of rated power | | Typical summer roof | 55 °C | 622 W | 632 W | 92.2% of rated power | | Hot roof | 70 °C | 596 W | 605 W | 88.3% of rated power | ## Against the whole database | Measure | A675-MAE78Dw | A685-MAE78Dw | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #219 | #74 | 14,005 | A685-MAE78Dw leads by 145 places | | Power density | #216 | #76 | 14,005 | A685-MAE78Dw leads by 140 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #4,436 | #3,732 | 14,005 | A685-MAE78Dw leads by 704 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #494 | #271 | 14,005 | A685-MAE78Dw leads by 223 places | ## Questions ### Which panel is better: AIKO AIKO-A675-MAE78Dw or AIKO AIKO-A685-MAE78Dw? According to our database: **AIKO AIKO-A685-MAE78Dw** has higher module efficiency (**24.50%** vs **24.10%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-A675-MAE78Dw and AIKO AIKO-A685-MAE78Dw? **AIKO AIKO-A675-MAE78Dw** has a module efficiency of **24.10%**, while **AIKO AIKO-A685-MAE78Dw** is **24.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A675-MAE78Dw use vs AIKO AIKO-A685-MAE78Dw? **AIKO AIKO-A675-MAE78Dw** uses **Back Contact** cells; **AIKO AIKO-A685-MAE78Dw** uses **Back Contact**. 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-A675-MAE78Dw and AIKO AIKO-A685-MAE78Dw? **AIKO AIKO-A675-MAE78Dw** has a **30 years** power warranty; **AIKO AIKO-A685-MAE78Dw** 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 - [AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A700-MAE78Dw](https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a700-mae78dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A695-MAE78Dw](https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a695-mae78dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A690-MAE78Dw](https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a690-mae78dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A680-MAE78Dw](https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a680-mae78dw) - One difference: module efficiency - [AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A805-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a805-grh78dw) - 9 differences, the largest is module efficiency - [AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A800-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a800-grh78dw) - 9 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a675-mae78dw/aiko-aiko-a685-mae78dw 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.