--- title: "AIKO AIKO-A655-GRH66Dw vs Longi Solar LR7-54HVH-500M - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A655-GRH66Dw vs Longi Solar LR7-54HVH-500M 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-grh66dw/longi-lr7-54hvh-500m" updated: 2026-09-11 --- # AIKO AIKO-A655-GRH66Dw vs Longi Solar LR7-54HVH-500M LR7-54HVH-500M leads on the differences that matter The largest is rated power: 155 W more power. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A655-GRH66Dw](https://comparepv.com/panel/aiko-aiko-a655-grh66dw) | [Longi Solar LR7-54HVH-500M](https://comparepv.com/panel/longi-lr7-54hvh-500m) | | Manufacturer | AIKO | Longi Solar | | Power | 655 Wp | 500 Wp | | Efficiency | 24.20 % | 24.50 % | | Technology | Back Contact | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AIKO-A655-GRH66Dw | LR7-54HVH-500M | Difference | | --- | --- | --- | --- | | Rated power | 655 Wp | 500 Wp | +155 W for AIKO-A655-GRH66Dw | | Weight | 32.5 kg | 21.6 kg | -10.9 kg for LR7-54HVH-500M | | Weight per kWp | 49.6 kg/kWp | 43.2 kg/kWp | -6.4 kg/kWp for LR7-54HVH-500M | | Open-circuit voltage | 49.40 V | 40.75 V | 8.65 V apart | | Module area | 2.701 m² | 2.041 m² | 0.660 m² apart | | Module efficiency | 24.20 % | 24.50 % | +0.30 pp for LR7-54HVH-500M | | Cell technology | Back Contact | N-type | Back Contact vs N-type | | Short-circuit current | 16.69 A | 15.53 A | 1.16 A apart | | Voltage at max power | 42.10 V | 33.73 V | 8.37 V apart | | Cell count | 132 | 108 | 24 cells apart | | Bifacial | Yes | No | Yes vs No | | Dimensions | 2382x1134x30 mm | 1800x1134x30 mm | 2382x1134x30 mm vs 1800x1134x30 mm | | Current at max power | 15.56 A | 14.83 A | 0.73 A apart | ## Every compared parameter | Parameter | AIKO-A655-GRH66Dw | LR7-54HVH-500M | | --- | --- | --- | | Rated power | 655 Wp | 500 Wp | | Module efficiency | 24.20 % | 24.50 % | | Power density | 242.5 Wp/m² | 245.0 Wp/m² | | Open-circuit voltage | 49.40 V | 40.75 V | | Voltage at max power | 42.10 V | 33.73 V | | Short-circuit current | 16.69 A | 15.53 A | | Current at max power | 15.56 A | 14.83 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 1800x1134x30 mm | | Module area | 2.701 m² | 2.041 m² | | Weight | 32.5 kg | 21.6 kg | | Weight per kWp | 49.6 kg/kWp | 43.2 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | Back Contact | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 108 | | Bifacial | Yes | 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, AIKO-A655-GRH66Dw:** 22,148 kWh - **Cumulative output, LR7-54HVH-500M:** 16,907 kWh - **Gap:** 5,241 kWh ## Output when hot | Condition | Cell temperature | AIKO-A655-GRH66Dw | LR7-54HVH-500M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 655 W | 500 W | 100.0% of rated power | | Cool, bright day | 40 °C | 629 W | 481 W | 96.1% of rated power | | Typical summer roof | 55 °C | 604 W | 461 W | 92.2% of rated power | | Hot roof | 70 °C | 578 W | 442 W | 88.3% of rated power | ## Against the whole database | Measure | AIKO-A655-GRH66Dw | LR7-54HVH-500M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #184 | #74 | 14,005 | LR7-54HVH-500M leads by 110 places | | Power density | #172 | #77 | 14,005 | LR7-54HVH-500M leads by 95 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #3,162 | #274 | 14,005 | LR7-54HVH-500M leads by 2,888 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #738 | #4,105 | 14,005 | AIKO-A655-GRH66Dw leads by 3,367 places | ## Questions ### Which panel is better: AIKO AIKO-A655-GRH66Dw or Longi Solar LR7-54HVH-500M? According to our database: **Longi Solar LR7-54HVH-500M** has higher module efficiency (**24.50%** 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-GRH66Dw and Longi Solar LR7-54HVH-500M? **AIKO AIKO-A655-GRH66Dw** has a module efficiency of **24.20%**, while **Longi Solar LR7-54HVH-500M** is **24.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A655-GRH66Dw use vs Longi Solar LR7-54HVH-500M? **AIKO AIKO-A655-GRH66Dw** uses **Back Contact** cells; **Longi Solar LR7-54HVH-500M** 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-A655-GRH66Dw and Longi Solar LR7-54HVH-500M? **AIKO AIKO-A655-GRH66Dw** has a **30 years** power warranty; **Longi Solar LR7-54HVH-500M** 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-GRH66Dw and Longi Solar LR7-54HVH-500M bifacial panels? **AIKO AIKO-A655-GRH66Dw** is bifacial (captures light from both faces); **Longi Solar LR7-54HVH-500M** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [AIKO AIKO-A655-GRH66Dw vs AIKO AIKO-G660-MCH72Dw](https://comparepv.com/compare/aiko-aiko-a655-grh66dw/aiko-aiko-g660-mch72dw) - 7 differences, the largest is open-circuit voltage - [AIKO AIKO-A655-GRH66Dw vs AIKO AIKO-A660-GRH66Dw](https://comparepv.com/compare/aiko-aiko-a655-grh66dw/aiko-aiko-a660-grh66dw) - One difference: module efficiency - [AIKO AIKO-A655-GRH66Dw vs AIKO AIKO-A650-GRH66Dw](https://comparepv.com/compare/aiko-aiko-a655-grh66dw/aiko-aiko-a650-grh66dw) - The same specification on paper - [AIKO AIKO-A655-GRH66Dw vs AIKO AIKO-A645-GRH66Dw](https://comparepv.com/compare/aiko-aiko-a655-grh66dw/aiko-aiko-a645-grh66dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A655-GRH66Dw vs AIKO AIKO-A640-GRH66Dw](https://comparepv.com/compare/aiko-aiko-a655-grh66dw/aiko-aiko-a640-grh66dw) - 3 differences, the largest is module efficiency - [Longi Solar LR7-54HVH-500M vs Longi Solar LR7-54HVH-495M](https://comparepv.com/compare/longi-lr7-54hvh-500m/longi-lr7-54hvh-495m) - One difference: module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a655-grh66dw/longi-lr7-54hvh-500m 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.