--- title: "AIKO AIKO-A800-GRH78Dw vs AIKO M550M-144 - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A800-GRH78Dw vs AIKO M550M-144 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-a800-grh78dw/aiko-m550m-144" image: "https://comparepv.com/og/compare/panels/aiko-aiko-a800-grh78dw/aiko-m550m-144.png" updated: 2026-09-11 --- # AIKO AIKO-A800-GRH78Dw vs AIKO M550M-144 AIKO-A800-GRH78Dw leads on the differences that matter The largest is module efficiency: 3.60 pp more efficient. 1 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-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | [AIKO M550M-144](https://comparepv.com/panel/aiko-m550m-144) | | Manufacturer | AIKO | AIKO | | Power | 800 Wp | 550 Wp | | Efficiency | 24.90 % | 21.30 % | | Technology | Back Contact | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AIKO-A800-GRH78Dw | M550M-144 | Difference | | --- | --- | --- | --- | | Module efficiency | 24.90 % | 21.30 % | +3.60 pp for AIKO-A800-GRH78Dw | | Temperature coefficient | -0.260 %/°C | -0.360 %/°C | +0.100 %/°C for AIKO-A800-GRH78Dw | | Rated power | 800 Wp | 550 Wp | +250 W for AIKO-A800-GRH78Dw | | Power density | 249.1 Wp/m² | 212.8 Wp/m² | +36.3 Wp/m² for AIKO-A800-GRH78Dw | | Performance warranty | 30 yrs | 25 yrs | +5 yrs for AIKO-A800-GRH78Dw | | Weight | 39.8 kg | 29.0 kg | -10.8 kg for M550M-144 | | Product warranty | 15 yrs | 12 yrs | +3 yrs for AIKO-A800-GRH78Dw | | Open-circuit voltage | 59.32 V | 49.90 V | 9.42 V apart | | Short-circuit current | 17.06 A | 13.80 A | 3.26 A apart | | Module area | 3.212 m² | 2.584 m² | 0.628 m² apart | | Cell technology | Back Contact | PERC | Back Contact vs PERC | | Weight per kWp | 49.7 kg/kWp | 52.7 kg/kWp | -3.0 kg/kWp for AIKO-A800-GRH78Dw | | Voltage at max power | 49.36 V | 42.10 V | 7.26 V apart | | Current at max power | 16.21 A | 13.07 A | 3.14 A apart | | Cell count | 156 | 144 | 12 cells apart | | Bifacial | Yes | No | Yes vs No | | Dimensions | 2465x1303x33 mm | 2279x1134x35 mm | 2465x1303x33 mm vs 2279x1134x35 mm | ## Every compared parameter | Parameter | AIKO-A800-GRH78Dw | M550M-144 | | --- | --- | --- | | Rated power | 800 Wp | 550 Wp | | Module efficiency | 24.90 % | 21.30 % | | Power density | 249.1 Wp/m² | 212.8 Wp/m² | | Open-circuit voltage | 59.32 V | 49.90 V | | Voltage at max power | 49.36 V | 42.10 V | | Short-circuit current | 17.06 A | 13.80 A | | Current at max power | 16.21 A | 13.07 A | | Temperature coefficient | -0.260 %/°C | -0.360 %/°C | | Dimensions | 2465x1303x33 mm | 2279x1134x35 mm | | Module area | 3.212 m² | 2.584 m² | | Weight | 39.8 kg | 29.0 kg | | Weight per kWp | 49.7 kg/kWp | 52.7 kg/kWp | | Product warranty | 15 yrs | 12 yrs | | Performance warranty | 30 yrs | 25 yrs | | Annual degradation | - | 0.55 %/yr | | Cell technology | Back Contact | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 144 | | Bifacial | Yes | No | ## 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 - **Cumulative output, AIKO-A800-GRH78Dw:** 26,842 kWh - **Cumulative output, M550M-144:** 18,454 kWh - **Gap:** 8,388 kWh ## Output when hot | Condition | Cell temperature | AIKO-A800-GRH78Dw | M550M-144 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 800 W | 550 W | 100.0% of rated power | | Cool, bright day | 40 °C | 769 W | 520 W | 94.6% of rated power | | Typical summer roof | 55 °C | 738 W | 491 W | 89.2% of rated power | | Hot roof | 70 °C | 706 W | 461 W | 83.8% of rated power | ## Against the whole database | Measure | AIKO-A800-GRH78Dw | M550M-144 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #11 | #8,585 | 14,129 | AIKO-A800-GRH78Dw leads by 8,574 places | | Power density | #11 | #8,709 | 14,129 | AIKO-A800-GRH78Dw leads by 8,698 places | | Heat behaviour | #515 | #12,425 | 14,129 | AIKO-A800-GRH78Dw leads by 11,910 places | | Weight | #3,225 | #6,427 | 14,129 | AIKO-A800-GRH78Dw leads by 3,202 places | | Warranty | #21 | #9,912 | 14,129 | AIKO-A800-GRH78Dw leads by 9,891 places | | Overall | #2 | #8,140 | 14,129 | AIKO-A800-GRH78Dw leads by 8,138 places | ## Questions ### Which panel is better: AIKO AIKO-A800-GRH78Dw or AIKO M550M-144? According to our database: **AIKO AIKO-A800-GRH78Dw** has higher module efficiency (**24.90%** vs **21.30%**); **AIKO AIKO-A800-GRH78Dw** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.360%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-A800-GRH78Dw and AIKO M550M-144? **AIKO AIKO-A800-GRH78Dw** has a module efficiency of **24.90%**, while **AIKO M550M-144** is **21.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A800-GRH78Dw use vs AIKO M550M-144? **AIKO AIKO-A800-GRH78Dw** uses **Back Contact** cells; **AIKO M550M-144** 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 AIKO AIKO-A800-GRH78Dw and AIKO M550M-144? **AIKO AIKO-A800-GRH78Dw** has a **30 years** power warranty; **AIKO M550M-144** has a **25 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-A800-GRH78Dw and AIKO M550M-144 bifacial panels? **AIKO AIKO-A800-GRH78Dw** is bifacial (captures light from both faces); **AIKO M550M-144** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A805-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-aiko-a805-grh78dw) - One difference: module efficiency - [AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A795-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-aiko-a795-grh78dw) - The same specification on paper - [AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A790-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-aiko-a790-grh78dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A785-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-aiko-a785-grh78dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A780-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-aiko-a780-grh78dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A800-GRH78Dw vs AIKO AIKO-A775-GRH78Dw](https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-aiko-a775-grh78dw) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a800-grh78dw/aiko-m550m-144 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.