--- title: "AIKO AIKO-A660-MDE72Dw vs Longi Solar LR7-72HVHF-645M - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A660-MDE72Dw vs Longi Solar LR7-72HVHF-645M 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-a660-mde72dw/longi-lr7-72hvhf-645m" updated: 2026-09-11 --- # AIKO AIKO-A660-MDE72Dw vs Longi Solar LR7-72HVHF-645M 7 differences, and they point both ways The largest is module efficiency: 0.50 pp more efficient. 12 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A660-MDE72Dw](https://comparepv.com/panel/aiko-aiko-a660-mde72dw) | [Longi Solar LR7-72HVHF-645M](https://comparepv.com/panel/longi-lr7-72hvhf-645m) | | Manufacturer | AIKO | Longi Solar | | Power | 660 Wp | 645 Wp | | Efficiency | 24.40 % | 23.90 % | | Technology | Back Contact | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AIKO-A660-MDE72Dw | LR7-72HVHF-645M | Difference | | --- | --- | --- | --- | | Module efficiency | 24.40 % | 23.90 % | +0.50 pp for AIKO-A660-MDE72Dw | | Weight | 33.0 kg | 28.5 kg | -4.5 kg for LR7-72HVHF-645M | | Weight per kWp | 50.0 kg/kWp | 44.2 kg/kWp | -5.8 kg/kWp for LR7-72HVHF-645M | | Power density | 244.3 Wp/m² | 238.8 Wp/m² | +5.6 Wp/m² for AIKO-A660-MDE72Dw | | Rated power | 660 Wp | 645 Wp | +15 W for AIKO-A660-MDE72Dw | | Cell technology | Back Contact | N-type | Back Contact vs N-type | | Voltage at max power | 45.50 V | 44.46 V | 1.04 V apart | ## Every compared parameter | Parameter | AIKO-A660-MDE72Dw | LR7-72HVHF-645M | | --- | --- | --- | | Rated power | 660 Wp | 645 Wp | | Module efficiency | 24.40 % | 23.90 % | | Power density | 244.3 Wp/m² | 238.8 Wp/m² | | Open-circuit voltage | 54.20 V | 53.80 V | | Voltage at max power | 45.50 V | 44.46 V | | Short-circuit current | 15.18 A | 15.21 A | | Current at max power | 14.51 A | 14.51 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 33.0 kg | 28.5 kg | | Weight per kWp | 50.0 kg/kWp | 44.2 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 | 144 | 144 | | 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, AIKO-A660-MDE72Dw:** 22,317 kWh - **Cumulative output, LR7-72HVHF-645M:** 21,809 kWh - **Gap:** 508 kWh ## Output when hot | Condition | Cell temperature | AIKO-A660-MDE72Dw | LR7-72HVHF-645M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 660 W | 645 W | 100.0% of rated power | | Cool, bright day | 40 °C | 634 W | 620 W | 96.1% of rated power | | Typical summer roof | 55 °C | 609 W | 595 W | 92.2% of rated power | | Hot roof | 70 °C | 583 W | 570 W | 88.3% of rated power | ## Against the whole database | Measure | AIKO-A660-MDE72Dw | LR7-72HVHF-645M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #99 | #351 | 14,005 | AIKO-A660-MDE72Dw leads by 252 places | | Power density | #88 | #356 | 14,005 | AIKO-A660-MDE72Dw leads by 268 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #3,317 | #388 | 14,005 | LR7-72HVHF-645M leads by 2,929 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #576 | #1,001 | 14,005 | AIKO-A660-MDE72Dw leads by 425 places | ## Questions ### Which panel is better: AIKO AIKO-A660-MDE72Dw or Longi Solar LR7-72HVHF-645M? According to our database: **AIKO AIKO-A660-MDE72Dw** has higher module efficiency (**24.40%** vs **23.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-A660-MDE72Dw and Longi Solar LR7-72HVHF-645M? **AIKO AIKO-A660-MDE72Dw** has a module efficiency of **24.40%**, while **Longi Solar LR7-72HVHF-645M** is **23.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A660-MDE72Dw use vs Longi Solar LR7-72HVHF-645M? **AIKO AIKO-A660-MDE72Dw** uses **Back Contact** cells; **Longi Solar LR7-72HVHF-645M** 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-A660-MDE72Dw and Longi Solar LR7-72HVHF-645M? **AIKO AIKO-A660-MDE72Dw** has a **30 years** power warranty; **Longi Solar LR7-72HVHF-645M** 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-A660-MDE72Dw vs AIKO AIKO-A675-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a660-mde72dw/aiko-aiko-a675-mde72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A660-MDE72Dw vs AIKO AIKO-A670-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a660-mde72dw/aiko-aiko-a670-mde72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A660-MDE72Dw vs AIKO AIKO-A665-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a660-mde72dw/aiko-aiko-a665-mde72dw) - One difference: module efficiency - [AIKO AIKO-A660-MDE72Dw vs AIKO AIKO-A655-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a660-mde72dw/aiko-aiko-a655-mde72dw) - One difference: module efficiency - [AIKO AIKO-A660-MDE72Dw vs AIKO AIKO-A650-MDE72Dw](https://comparepv.com/compare/aiko-aiko-a660-mde72dw/aiko-aiko-a650-mde72dw) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HVHF-645M vs Longi Solar LR7-72HVHF-670M](https://comparepv.com/compare/longi-lr7-72hvhf-645m/longi-lr7-72hvhf-670m) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a660-mde72dw/longi-lr7-72hvhf-645m 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.