--- title: "AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A805-GRH78Dw - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A805-GRH78Dw 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-a655-mde72mw/aiko-aiko-a805-grh78dw" updated: 2026-09-11 --- # AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A805-GRH78Dw A805-GRH78Dw leads on the differences that matter The largest is module efficiency: 0.90 pp more efficient. 5 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A655-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a655-mde72mw) | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | | Manufacturer | AIKO | AIKO | | Power | 655 Wp | 805 Wp | | Efficiency | 24.20 % | 25.10 % | | Technology | Back Contact | Back Contact | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | A655-MDE72Mw | A805-GRH78Dw | Difference | | --- | --- | --- | --- | | Module efficiency | 24.20 % | 25.10 % | +0.90 pp for A805-GRH78Dw | | Rated power | 655 Wp | 805 Wp | +150 W for A805-GRH78Dw | | Weight | 29.0 kg | 39.8 kg | -10.8 kg for A655-MDE72Mw | | Power density | 242.5 Wp/m² | 250.6 Wp/m² | +8.1 Wp/m² for A805-GRH78Dw | | Open-circuit voltage | 54.50 V | 59.42 V | 4.92 V apart | | Module area | 2.701 m² | 3.212 m² | 0.511 m² apart | | Short-circuit current | 15.18 A | 17.13 A | 1.95 A apart | | Weight per kWp | 44.3 kg/kWp | 49.4 kg/kWp | -5.2 kg/kWp for A655-MDE72Mw | | Voltage at max power | 45.20 V | 49.46 V | 4.26 V apart | | Cell count | 144 | 156 | 12 cells apart | | Current at max power | 14.50 A | 16.28 A | 1.78 A apart | | Bifacial | No | Yes | No vs Yes | | Dimensions | 2382x1134x30 mm | 2465x1303x33 mm | 2382x1134x30 mm vs 2465x1303x33 mm | ## Every compared parameter | Parameter | A655-MDE72Mw | A805-GRH78Dw | | --- | --- | --- | | Rated power | 655 Wp | 805 Wp | | Module efficiency | 24.20 % | 25.10 % | | Power density | 242.5 Wp/m² | 250.6 Wp/m² | | Open-circuit voltage | 54.50 V | 59.42 V | | Voltage at max power | 45.20 V | 49.46 V | | Short-circuit current | 15.18 A | 17.13 A | | Current at max power | 14.50 A | 16.28 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2465x1303x33 mm | | Module area | 2.701 m² | 3.212 m² | | Weight | 29.0 kg | 39.8 kg | | Weight per kWp | 44.3 kg/kWp | 49.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | - | | Cell technology | Back Contact | Back Contact | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 156 | | Bifacial | No | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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, A655-MDE72Mw:** 21,977 kWh - **Cumulative output, A805-GRH78Dw:** 27,009 kWh - **Gap:** 5,032 kWh ## Output when hot | Condition | Cell temperature | A655-MDE72Mw | A805-GRH78Dw | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 655 W | 805 W | 100.0% of rated power | | Cool, bright day | 40 °C | 629 W | 774 W | 96.1% of rated power | | Typical summer roof | 55 °C | 604 W | 742 W | 92.2% of rated power | | Hot roof | 70 °C | 578 W | 711 W | 88.3% of rated power | ## Against the whole database | Measure | A655-MDE72Mw | A805-GRH78Dw | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #184 | #3 | 14,005 | A805-GRH78Dw leads by 181 places | | Power density | #172 | #3 | 14,005 | A805-GRH78Dw leads by 169 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #415 | #2,977 | 14,005 | A655-MDE72Mw leads by 2,562 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #665 | #1 | 14,005 | A805-GRH78Dw leads by 664 places | ## Questions ### Which panel is better: AIKO AIKO-A655-MDE72Mw or AIKO AIKO-A805-GRH78Dw? According to our database: **AIKO AIKO-A805-GRH78Dw** has higher module efficiency (**25.10%** vs **24.20%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-A655-MDE72Mw and AIKO AIKO-A805-GRH78Dw? **AIKO AIKO-A655-MDE72Mw** has a module efficiency of **24.20%**, while **AIKO AIKO-A805-GRH78Dw** is **25.10%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A655-MDE72Mw use vs AIKO AIKO-A805-GRH78Dw? **AIKO AIKO-A655-MDE72Mw** uses **Back Contact** cells; **AIKO AIKO-A805-GRH78Dw** 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-A655-MDE72Mw and AIKO AIKO-A805-GRH78Dw? **AIKO AIKO-A655-MDE72Mw** has a **30 years** power warranty; **AIKO AIKO-A805-GRH78Dw** 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-A655-MDE72Mw and AIKO AIKO-A805-GRH78Dw bifacial panels? **AIKO AIKO-A805-GRH78Dw** is bifacial (captures light from both faces); **AIKO AIKO-A655-MDE72Mw** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A680-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a655-mde72mw/aiko-aiko-a680-mde72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A675-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a655-mde72mw/aiko-aiko-a675-mde72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A670-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a655-mde72mw/aiko-aiko-a670-mde72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A665-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a655-mde72mw/aiko-aiko-a665-mde72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A655-MDE72Mw vs AIKO AIKO-A660-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a655-mde72mw/aiko-aiko-a660-mde72mw) - One difference: module efficiency - [AIKO AIKO-A805-GRH78Dw vs AIKO AIKO-A800-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a805-grh78dw/aiko-aiko-a800-grh78dw) - One difference: module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a655-mde72mw/aiko-aiko-a805-grh78dw 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.