--- title: "AIKO AIKO-A665-MDE72Mw vs Trina Solar TSM-DEG21C.20-665 - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-A665-MDE72Mw vs Trina Solar TSM-DEG21C.20-665 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-a665-mde72mw/trina-solar-co-ltd-tsm-deg21c-20-665" updated: 2026-09-11 --- # AIKO AIKO-A665-MDE72Mw vs Trina Solar TSM-DEG21C.20-665 AIKO-A665-MDE72Mw leads on the differences that matter The largest is module efficiency: 3.20 pp more efficient. 3 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-A665-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a665-mde72mw) | [Trina Solar TSM-DEG21C.20-665](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-665) | | Manufacturer | AIKO | Trina Solar | | Power | 665 Wp | 665 Wp | | Efficiency | 24.60 % | 21.40 % | | Technology | Back Contact | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AIKO-A665-MDE72Mw | TSM-DEG21C.20-665 | Difference | | --- | --- | --- | --- | | Module efficiency | 24.60 % | 21.40 % | +3.20 pp for AIKO-A665-MDE72Mw | | Temperature coefficient | -0.260 %/°C | -0.340 %/°C | +0.080 %/°C for AIKO-A665-MDE72Mw | | Power density | 246.2 Wp/m² | 214.1 Wp/m² | +32.1 Wp/m² for AIKO-A665-MDE72Mw | | Weight | 29.0 kg | 38.3 kg | -9.3 kg for AIKO-A665-MDE72Mw | | Weight per kWp | 43.6 kg/kWp | 57.6 kg/kWp | -14.0 kg/kWp for AIKO-A665-MDE72Mw | | Product warranty | 15 yrs | 12 yrs | +3 yrs for AIKO-A665-MDE72Mw | | Annual degradation | 0.35 %/yr | 0.45 %/yr | -0.10 %/yr for AIKO-A665-MDE72Mw | | Open-circuit voltage | 54.70 V | 46.10 V | 8.60 V apart | | Short-circuit current | 15.30 A | 18.50 A | 3.20 A apart | | Module area | 2.701 m² | 3.106 m² | 0.405 m² apart | | Cell technology | Back Contact | PERC | Back Contact vs PERC | | Voltage at max power | 45.40 V | 38.30 V | 7.10 V apart | | Current at max power | 14.65 A | 17.39 A | 2.74 A apart | | Cell count | 144 | 132 | 12 cells apart | | Bifacial | No | Yes | No vs Yes | | Dimensions | 2382x1134x30 mm | 2384x1303x33 mm | 2382x1134x30 mm vs 2384x1303x33 mm | ## Every compared parameter | Parameter | AIKO-A665-MDE72Mw | TSM-DEG21C.20-665 | | --- | --- | --- | | Rated power | 665 Wp | 665 Wp | | Module efficiency | 24.60 % | 21.40 % | | Power density | 246.2 Wp/m² | 214.1 Wp/m² | | Open-circuit voltage | 54.70 V | 46.10 V | | Voltage at max power | 45.40 V | 38.30 V | | Short-circuit current | 15.30 A | 18.50 A | | Current at max power | 14.65 A | 17.39 A | | Temperature coefficient | -0.260 %/°C | -0.340 %/°C | | Dimensions | 2382x1134x30 mm | 2384x1303x33 mm | | Module area | 2.701 m² | 3.106 m² | | Weight | 29.0 kg | 38.3 kg | | Weight per kWp | 43.6 kg/kWp | 57.6 kg/kWp | | Product warranty | 15 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.45 %/yr | | Cell technology | Back Contact | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 132 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, AIKO-A665-MDE72Mw:** 22,486 kWh - **Cumulative output, TSM-DEG21C.20-665:** 21,899 kWh - **Gap:** 587 kWh ## Output when hot | Condition | Cell temperature | AIKO-A665-MDE72Mw | TSM-DEG21C.20-665 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 665 W | 665 W | 100.0% of rated power | | Cool, bright day | 40 °C | 639 W | 631 W | 94.9% of rated power | | Typical summer roof | 55 °C | 613 W | 597 W | 89.8% of rated power | | Hot roof | 70 °C | 587 W | 563 W | 84.7% of rated power | ## Against the whole database | Measure | AIKO-A665-MDE72Mw | TSM-DEG21C.20-665 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #51 | #8,323 | 14,005 | AIKO-A665-MDE72Mw leads by 8,272 places | | Power density | #42 | #8,250 | 14,005 | AIKO-A665-MDE72Mw leads by 8,208 places | | Heat behaviour | #511 | #8,778 | 14,005 | AIKO-A665-MDE72Mw leads by 8,267 places | | Weight | #315 | #11,303 | 14,005 | AIKO-A665-MDE72Mw leads by 10,988 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #390 | #2,833 | 14,005 | AIKO-A665-MDE72Mw leads by 2,443 places | ## Questions ### Which panel is better: AIKO AIKO-A665-MDE72Mw or Trina Solar TSM-DEG21C.20-665? According to our database: **AIKO AIKO-A665-MDE72Mw** has higher module efficiency (**24.60%** vs **21.40%**); **AIKO AIKO-A665-MDE72Mw** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.340%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-A665-MDE72Mw and Trina Solar TSM-DEG21C.20-665? **AIKO AIKO-A665-MDE72Mw** has a module efficiency of **24.60%**, while **Trina Solar TSM-DEG21C.20-665** is **21.40%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-A665-MDE72Mw use vs Trina Solar TSM-DEG21C.20-665? **AIKO AIKO-A665-MDE72Mw** uses **Back Contact** cells; **Trina Solar TSM-DEG21C.20-665** 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-A665-MDE72Mw and Trina Solar TSM-DEG21C.20-665? **AIKO AIKO-A665-MDE72Mw** has a **30 years** power warranty; **Trina Solar TSM-DEG21C.20-665** 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-A665-MDE72Mw and Trina Solar TSM-DEG21C.20-665 bifacial panels? **Trina Solar TSM-DEG21C.20-665** is bifacial (captures light from both faces); **AIKO AIKO-A665-MDE72Mw** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [AIKO AIKO-A665-MDE72Mw vs AIKO AIKO-A680-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a665-mde72mw/aiko-aiko-a680-mde72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A665-MDE72Mw vs AIKO AIKO-A675-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a665-mde72mw/aiko-aiko-a675-mde72mw) - 3 differences, the largest is module efficiency - [AIKO AIKO-A665-MDE72Mw vs AIKO AIKO-A670-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a665-mde72mw/aiko-aiko-a670-mde72mw) - One difference: module efficiency - [AIKO AIKO-A665-MDE72Mw vs AIKO AIKO-A660-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a665-mde72mw/aiko-aiko-a660-mde72mw) - One difference: module efficiency - [AIKO AIKO-A665-MDE72Mw vs AIKO AIKO-A655-MDE72Mw](https://comparepv.com/compare/aiko-aiko-a665-mde72mw/aiko-aiko-a655-mde72mw) - 3 differences, the largest is module efficiency - [Trina Solar TSM-DEG21C.20-665 vs Trina Solar TSM-DEG21C.20-660](https://comparepv.com/compare/trina-solar-co-ltd-tsm-deg21c-20-665/trina-solar-co-ltd-tsm-deg21c-20-660) - One difference: module efficiency --- Source: https://comparepv.com/compare/aiko-aiko-a665-mde72mw/trina-solar-co-ltd-tsm-deg21c-20-665 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.