--- title: "AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A620-MAH72Dw G - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A620-MAH72Dw G 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-a615-mah72dw-g/aiko-aiko-a620-mah72dw-g" updated: 2026-09-11 --- # AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A620-MAH72Dw G A620-MAH72Dw G leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A615-MAH72Dw G](https://comparepv.com/panel/aiko-aiko-a615-mah72dw-g) | [AIKO AIKO-A620-MAH72Dw G](https://comparepv.com/panel/aiko-aiko-a620-mah72dw-g) | | Manufacturer | AIKO | AIKO | | Power | 615 Wp | 620 Wp | | Efficiency | 23.30 % | 23.50 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | A615-MAH72Dw G | A620-MAH72Dw G | Difference | | --- | --- | --- | --- | | Module efficiency | 23.30 % | 23.50 % | +0.20 pp for A620-MAH72Dw G | ## Every compared parameter | Parameter | A615-MAH72Dw G | A620-MAH72Dw G | | --- | --- | --- | | Rated power | 615 Wp | 620 Wp | | Module efficiency | 23.30 % | 23.50 % | | Power density | 233.5 Wp/m² | 235.4 Wp/m² | | Open-circuit voltage | 53.45 V | 53.55 V | | Voltage at max power | 44.98 V | 45.08 V | | Short-circuit current | 14.17 A | 14.23 A | | Current at max power | 13.68 A | 13.76 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2323x1134x35 mm | 2323x1134x35 mm | | Module area | 2.634 m² | 2.634 m² | | Weight | 33.0 kg | 33.0 kg | | Weight per kWp | 53.7 kg/kWp | 53.2 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | N-type | N-type | | 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 (-0.290 %/°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, A615-MAH72Dw G:** 20,795 kWh - **Cumulative output, A620-MAH72Dw G:** 20,964 kWh - **Gap:** 169 kWh ## Output when hot | Condition | Cell temperature | A615-MAH72Dw G | A620-MAH72Dw G | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 615 W | 620 W | 100.0% of rated power | | Cool, bright day | 40 °C | 588 W | 593 W | 95.7% of rated power | | Typical summer roof | 55 °C | 561 W | 566 W | 91.3% of rated power | | Hot roof | 70 °C | 535 W | 539 W | 87.0% of rated power | ## Against the whole database | Measure | A615-MAH72Dw G | A620-MAH72Dw G | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,017 | #716 | 14,005 | A620-MAH72Dw G leads by 301 places | | Power density | #930 | #669 | 14,005 | A620-MAH72Dw G leads by 261 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #7,656 | #7,064 | 14,005 | A620-MAH72Dw G leads by 592 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,943 | #1,716 | 14,005 | A620-MAH72Dw G leads by 227 places | ## Questions ### Which panel is better: AIKO AIKO-A615-MAH72Dw G or AIKO AIKO-A620-MAH72Dw G? According to our database: **AIKO AIKO-A620-MAH72Dw G** has higher module efficiency (**23.50%** vs **23.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-A615-MAH72Dw G and AIKO AIKO-A620-MAH72Dw G? **AIKO AIKO-A615-MAH72Dw G** has a module efficiency of **23.30%**, while **AIKO AIKO-A620-MAH72Dw G** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A615-MAH72Dw G use vs AIKO AIKO-A620-MAH72Dw G? **AIKO AIKO-A615-MAH72Dw G** uses **N-type** cells; **AIKO AIKO-A620-MAH72Dw G** 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 AIKO AIKO-A615-MAH72Dw G and AIKO AIKO-A620-MAH72Dw G? **AIKO AIKO-A615-MAH72Dw G** has a **30 years** power warranty; **AIKO AIKO-A620-MAH72Dw G** 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-A615-MAH72Dw G and AIKO AIKO-A620-MAH72Dw G bifacial panels? Both **AIKO AIKO-A615-MAH72Dw G** and **AIKO AIKO-A620-MAH72Dw G** 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 - [AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A625-MAH72Dw G](https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a625-mah72dw-g) - 3 differences, the largest is module efficiency - [AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A610-MAH72Dw G](https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a610-mah72dw-g) - The same specification on paper - [AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A605-MAH72Dw G](https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a605-mah72dw-g) - 3 differences, the largest is module efficiency - [AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A805-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a805-grh78dw) - 14 differences, the largest is module efficiency - [AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A800-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a800-grh78dw) - 14 differences, the largest is module efficiency - [AIKO AIKO-A615-MAH72Dw G vs AIKO AIKO-A795-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a795-grh78dw) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a615-mah72dw-g/aiko-aiko-a620-mah72dw-g 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.