--- title: "AE Solar AE CMD-108BDS-420 vs AE Solar AE440CMD-108BDE - Solar Panel Comparison | ComparePV" description: "Compare AE Solar AE CMD-108BDS-420 vs AE Solar AE440CMD-108BDE side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-ae440cmd-108bde" updated: 2026-09-11 --- # AE Solar AE CMD-108BDS-420 vs AE Solar AE440CMD-108BDE AE440CMD-108BDE leads on the differences that matter The largest is module efficiency: 1.03 pp more efficient. 12 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AE Solar AE CMD-108BDS-420](https://comparepv.com/panel/ae-solar-ae-cmd-108bds-420) | [AE Solar AE440CMD-108BDE](https://comparepv.com/panel/ae-solar-ae440cmd-108bde) | | Manufacturer | AE Solar | AE Solar | | Power | 420 Wp | 440 Wp | | Efficiency | 21.54 % | 22.57 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AE CMD-108BDS-420 | AE440CMD-108BDE | Difference | | --- | --- | --- | --- | | Module efficiency | 21.54 % | 22.57 % | +1.03 pp for AE440CMD-108BDE | | Power density | 215.4 Wp/m² | 225.7 Wp/m² | +10.3 Wp/m² for AE440CMD-108BDE | | Weight | 23.5 kg | 19.5 kg | -4.0 kg for AE440CMD-108BDE | | Weight per kWp | 56.0 kg/kWp | 44.3 kg/kWp | -11.6 kg/kWp for AE440CMD-108BDE | | Product warranty | 30 yrs | 15 yrs | +15 yrs for AE CMD-108BDS-420 | | Rated power | 420 Wp | 440 Wp | +20 W for AE440CMD-108BDE | | Open-circuit voltage | 37.86 V | 38.95 V | 1.09 V apart | ## Every compared parameter | Parameter | AE CMD-108BDS-420 | AE440CMD-108BDE | | --- | --- | --- | | Rated power | 420 Wp | 440 Wp | | Module efficiency | 21.54 % | 22.57 % | | Power density | 215.4 Wp/m² | 225.7 Wp/m² | | Open-circuit voltage | 37.86 V | 38.95 V | | Voltage at max power | 32.04 V | 33.01 V | | Short-circuit current | 14.03 A | 14.12 A | | Current at max power | 13.11 A | 13.33 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1721x1133x30 mm | 1721x1133x30 mm | | Module area | 1.950 m² | 1.950 m² | | Weight | 23.5 kg | 19.5 kg | | Weight per kWp | 56.0 kg/kWp | 44.3 kg/kWp | | Product warranty | 30 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.290 %/°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, AE CMD-108BDS-420:** 14,092 kWh - **Cumulative output, AE440CMD-108BDE:** 14,763 kWh - **Gap:** 671 kWh ## Output when hot | Condition | Cell temperature | AE CMD-108BDS-420 | AE440CMD-108BDE | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 420 W | 440 W | 100.0% of rated power | | Cool, bright day | 40 °C | 402 W | 421 W | 95.7% of rated power | | Typical summer roof | 55 °C | 383 W | 402 W | 91.3% of rated power | | Hot roof | 70 °C | 365 W | 383 W | 87.0% of rated power | ## Against the whole database | Measure | AE CMD-108BDS-420 | AE440CMD-108BDE | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,823 | #3,882 | 14,005 | AE440CMD-108BDE leads by 3,941 places | | Power density | #7,783 | #3,848 | 14,005 | AE440CMD-108BDE leads by 3,935 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #10,286 | #422 | 14,005 | AE440CMD-108BDE leads by 9,864 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #7,399 | #8,577 | 14,005 | AE CMD-108BDS-420 leads by 1,178 places | ## Questions ### Which panel is better: AE Solar AE CMD-108BDS-420 or AE Solar AE440CMD-108BDE? According to our database: **AE Solar AE440CMD-108BDE** has higher module efficiency (**22.57%** vs **21.54%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AE Solar AE CMD-108BDS-420 and AE Solar AE440CMD-108BDE? **AE Solar AE CMD-108BDS-420** has a module efficiency of **21.54%**, while **AE Solar AE440CMD-108BDE** is **22.57%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AE Solar AE CMD-108BDS-420 use vs AE Solar AE440CMD-108BDE? **AE Solar AE CMD-108BDS-420** uses **TOPCon** cells; **AE Solar AE440CMD-108BDE** uses **TOPCon**. 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 AE Solar AE CMD-108BDS-420 and AE Solar AE440CMD-108BDE? **AE Solar AE CMD-108BDS-420** has a **30 years** power warranty; **AE Solar AE440CMD-108BDE** 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 AE Solar AE CMD-108BDS-420 and AE Solar AE440CMD-108BDE bifacial panels? Both **AE Solar AE CMD-108BDS-420** and **AE Solar AE440CMD-108BDE** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [AE Solar AE CMD-108BDS-420 vs AE Solar CMD-108BDS-440W](https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-cmd-108bds-440w) - 4 differences, the largest is module efficiency - [AE Solar AE CMD-108BDS-420 vs AE Solar AE CMD-108BDS-440](https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-ae-cmd-108bds-440) - 4 differences, the largest is module efficiency - [AE Solar AE CMD-108BDS-420 vs AE Solar AExxxCMD-108BDE](https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-aexxxcmd-108bde) - 7 differences, the largest is module efficiency - [AE Solar AE CMD-108BDS-420 vs AE Solar CMD-108BDS-435W](https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-cmd-108bds-435w) - 3 differences, the largest is module efficiency - [AE Solar AE CMD-108BDS-420 vs AE Solar CMD-108BDE-435W](https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-cmd-108bde-435w) - 3 differences, the largest is module efficiency - [AE Solar AE CMD-108BDS-420 vs AE Solar AE CMD-108BDE-435](https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-ae-cmd-108bde-435) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/ae-solar-ae-cmd-108bds-420/ae-solar-ae440cmd-108bde 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.