--- title: "AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G645-MCH72Mw - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G645-MCH72Mw 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-g630-mch72mw/aiko-aiko-g645-mch72mw" updated: 2026-09-11 --- # AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G645-MCH72Mw G645-MCH72Mw leads on the differences that matter The largest is module efficiency: 0.60 pp more efficient. 15 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-G630-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g630-mch72mw) | [AIKO AIKO-G645-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g645-mch72mw) | | Manufacturer | AIKO | AIKO | | Power | 630 Wp | 645 Wp | | Efficiency | 23.30 % | 23.90 % | | Technology | Back Contact | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | G630-MCH72Mw | G645-MCH72Mw | Difference | | --- | --- | --- | --- | | Module efficiency | 23.30 % | 23.90 % | +0.60 pp for G645-MCH72Mw | | Power density | 233.2 Wp/m² | 238.8 Wp/m² | +5.6 Wp/m² for G645-MCH72Mw | | Rated power | 630 Wp | 645 Wp | +15 W for G645-MCH72Mw | | Cell technology | Back Contact | N-type | Back Contact vs N-type | ## Every compared parameter | Parameter | G630-MCH72Mw | G645-MCH72Mw | | --- | --- | --- | | Rated power | 630 Wp | 645 Wp | | Module efficiency | 23.30 % | 23.90 % | | Power density | 233.2 Wp/m² | 238.8 Wp/m² | | Open-circuit voltage | 54.00 V | 54.30 V | | Voltage at max power | 44.70 V | 45.00 V | | Short-circuit current | 14.88 A | 15.06 A | | Current at max power | 14.10 A | 14.34 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 31.5 kg | 31.5 kg | | Weight per kWp | 50.0 kg/kWp | 48.8 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, G630-MCH72Mw:** 21,302 kWh - **Cumulative output, G645-MCH72Mw:** 21,809 kWh - **Gap:** 507 kWh ## Output when hot | Condition | Cell temperature | G630-MCH72Mw | G645-MCH72Mw | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 630 W | 645 W | 100.0% of rated power | | Cool, bright day | 40 °C | 605 W | 620 W | 96.1% of rated power | | Typical summer roof | 55 °C | 581 W | 595 W | 92.2% of rated power | | Hot roof | 70 °C | 556 W | 570 W | 88.3% of rated power | ## Against the whole database | Measure | G630-MCH72Mw | G645-MCH72Mw | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,017 | #351 | 14,005 | G645-MCH72Mw leads by 666 places | | Power density | #1,003 | #356 | 14,005 | G645-MCH72Mw leads by 647 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #3,317 | #2,492 | 14,005 | G645-MCH72Mw leads by 825 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,617 | #1,065 | 14,005 | G645-MCH72Mw leads by 552 places | ## Questions ### Which panel is better: AIKO AIKO-G630-MCH72Mw or AIKO AIKO-G645-MCH72Mw? According to our database: **AIKO AIKO-G645-MCH72Mw** has higher module efficiency (**23.90%** 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-G630-MCH72Mw and AIKO AIKO-G645-MCH72Mw? **AIKO AIKO-G630-MCH72Mw** has a module efficiency of **23.30%**, while **AIKO AIKO-G645-MCH72Mw** is **23.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-G630-MCH72Mw use vs AIKO AIKO-G645-MCH72Mw? **AIKO AIKO-G630-MCH72Mw** uses **Back Contact** cells; **AIKO AIKO-G645-MCH72Mw** 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-G630-MCH72Mw and AIKO AIKO-G645-MCH72Mw? **AIKO AIKO-G630-MCH72Mw** has a **30 years** power warranty; **AIKO AIKO-G645-MCH72Mw** 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-G630-MCH72Mw vs AIKO AIKO-G660-MCH72Mw](https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g660-mch72mw) - 5 differences, the largest is module efficiency - [AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G655-MCH72Mw](https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g655-mch72mw) - 4 differences, the largest is module efficiency - [AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G650-MCH72Mw](https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g650-mch72mw) - 4 differences, the largest is module efficiency - [AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G640-MCH72Mw](https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g640-mch72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G635-MCH72Mw](https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g635-mch72mw) - One difference: module efficiency - [AIKO AIKO-G630-MCH72Mw vs AIKO AIKO-G625-MCH72Mw](https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g625-mch72mw) - One difference: module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-g630-mch72mw/aiko-aiko-g645-mch72mw 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.