---
title: "AU Optronics vs Canadian Solar - Brand Comparison | ComparePV"
description: "Compare AU Optronics vs Canadian Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/au-optronics-vs-canadian-solar"
---

# AU Optronics vs Canadian Solar

Canadian Solar has the broader catalog (292 vs 1 models). Canadian Solar leads on peak efficiency at 24.40%. Canadian Solar leans bifacial (46% of lineup).


## The two companies


| Attribute | AU Optronics | Canadian Solar |
| --- | --- | --- |
| Country | Taiwan | Canada |
| Headquarters | Hsinchu | Kitchener |
| Founded | 1996 | 2001 |
| Employees | 41000+ | 17,113 |
| Annual capacity |  | 51 GW/year |
| Tier 1 | yes | yes |
| Listed | TWSE (Taiwan Stock Exchange): 2409 | NASDAQ: CSIQ |
| Website | [https://www.auo.com/en-global](https://www.auo.com/en-global) | [https://www.canadiansolar.com](https://www.canadiansolar.com) |

AU Optronics (AUO) is a technology-driven company based in Taiwan, specializing in optoelectronics and display solutions. They deliver products and services that advance innovation in areas like display technology, system solutions, industrial intelligence, healthcare, and energy. AUO operates globally across Asia...

Canadian Solar Inc. is a global renewable energy company founded in 2001. Headquartered in Kitchener, Ontario, it manufactures solar PV modules and provides battery energy storage solutions. The company also develops utility-scale solar power and battery energy storage projects.


## Catalog & Power


| Measure | AU Optronics | Canadian Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 1 | 292 | +291 |
| Max Power | 170 W | 730 W | +560 W |
| Avg Power | 170 W | 472 W | +302 W |


## Efficiency


| Measure | AU Optronics | Canadian Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 16.00% | 24.40% | +8.40 pp |
| Avg Efficiency | 16.00% | 20.66% | +4.66 pp |


## Reliability & Warranty


| Measure | AU Optronics | Canadian Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.438%/°C | -0.331%/°C | +0.107 |
| Bifacial Share | 0 (0%) | 133 (46%) | +46 pp |
| Avg Warranty | - | 28.2 yrs |  |


## Efficiency distribution

Canadian Solar skews to higher efficiency: 13% of lineup is 23%+


| Efficiency band | AU Optronics | Canadian Solar |
| --- | --- | --- |
| \<20% | 1 (100.0%) | 128 (43.8%) |
| 20-21% | 0 | 36 (12.3%) |
| 21-22% | 0 | 41 (14.0%) |
| 22-23% | 0 | 50 (17.1%) |
| 23%+ | 0 | 37 (12.7%) |


## Power distribution

Canadian Solar offers more 600W+ panels (24% of lineup)


| Power band | AU Optronics | Canadian Solar |
| --- | --- | --- |
| \<400W | 1 (100.0%) | 104 (35.6%) |
| 400-499W | 0 | 72 (24.7%) |
| 500-599W | 0 | 45 (15.4%) |
| 600-699W | 0 | 64 (21.9%) |
| 700W+ | 0 | 7 (2.4%) |


## Cell technology

Dominant cell tech: **PERC** (67%)


| Technology | AU Optronics | Canadian Solar |
| --- | --- | --- |
| Unknown | 1 (100.0%) | 0 |
| PERC | 0 | 195 (66.8%) |
| TOPCon | 0 | 85 (29.1%) |
| HJT | 0 | 12 (4.1%) |


## Top panels, AU Optronics


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [ASM170M](https://comparepv.com/panel/au-optronics-asm170m) | 170 | 16.0 | -0.438 | Monocrystalline |


## Top panels, Canadian Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [CS7N-730TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-730tb-ag) | 730 | 23.5 | -0.290 | Monocrystalline |
| 2 | [CS7N-725TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-725tb-ag) | 725 | 23.3 | -0.290 | Monocrystalline |
| 3 | [CS7N-720TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-720tb-ag) | 720 | 23.2 | -0.290 | Monocrystalline |
| 4 | [CS7N-715TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-715tb-ag) | 715 | 23.0 | -0.290 | Monocrystalline |
| 5 | [CS7N-710TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-710tb-ag) | 710 | 22.9 | -0.290 | Monocrystalline |
| 6 | [CS7N-705TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-705tb-ag) | 705 | 22.7 | -0.290 | Monocrystalline |
| 7 | [CS7N-700TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-700tb-ag) | 700 | 22.5 | -0.290 | Monocrystalline |
| 8 | [CS7N-695TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-695tb-ag) | 695 | 22.4 | -0.290 | Monocrystalline |
| 9 | [CS7N-690TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-690tb-ag) | 690 | 22.2 | -0.290 | Monocrystalline |
| 10 | [CS7N-675MS](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-675ms) | 675 | 21.7 | -0.340 | Monocrystalline |


## Summary

AU Optronics, headquartered in Hsinchu, Taiwan, is best known as a global manufacturer of TFT-LCD displays; its solar business has operated under the BenQ Solar brand since 2012. The company built a vertically integrated solar value chain spanning ingot, wafer, cell, and module production, and appeared on Tier 1 bankability lists in the early-to-mid 2020s. However, recent search results surface only older panel models in the 250-290 W range on platforms such as EnergySage, and no significant new product launches for 2025 could be confirmed, suggesting its solar division has either scaled back considerably or refocused away from open-market module sales. Canadian Solar, incorporated in 2001 in Guelph, Ontario, is a publicly traded company (NASDAQ: CSIQ) with manufacturing concentrated in China. It holds confirmed BloombergNEF Tier 1 status and reported module manufacturing capacity of roughly 59 GW in mid-2025 SEC filings, placing it firmly among the handful of global-scale producers. Canadian Solar has a substantially stronger and more current institutional footprint.

Canadian Solar's active product lineup centers on N-type TOPCon technology, marketed under the HiKu6 and TOPHiKu6 series for residential and commercial rooftops, and the bifacial TOPBiHiKu6 line for commercial and utility-scale ground mounts. The TOPHiKu6 carries a 25-year product warranty and a 30-year linear performance guarantee. BenQ Solar's historical catalog covered residential and commercial segments, but no current TOPCon or high-wattage product line could be confirmed through recent sources.

For a buyer evaluating panels in 2025, Canadian Solar is the clear default choice. Its active product roadmap, confirmed Tier 1 bankability, broad installer network, and well-documented warranty terms reduce project risk substantially. AU Optronics - BenQ Solar - may be a viable option for buyers with existing inventory or legacy system expansions, but the lack of visible current product activity makes it difficult to recommend as a primary supplier for new installations.

\---LINKS---

\- https://www.energysage.com/supplier/21601/auo-benq-solar/ \| AUO BenQ Solar profile and panel listings - EnergySage \| review

\- https://www.solarreviews.com/blog/canadian-solar-panels-expert-review \| Canadian Solar Panels 2025 Expert Review - SolarReviews \| review

\- https://www.vicoexport.com/en/67499/tier-1-list-of-solar-panel-manufacturers-q2-2026/ \| Tier 1 List of Solar Panel Manufacturers Q2 2026 - Vico Export \| article

\- https://csesolarusa.com/product/canadian-solar-tophiku6-cs6-1-54tm-455h-455w-black-on-black-1-pallet-31pc/ \| Canadian Solar TOPHiKu6 TOPCon 455W panel - CSE Solar USA \| review

Sources:

\- \[AUO BenQ Solar - Profile & Reviews - 2026 \| EnergySage\](https://www.energysage.com/supplier/21601/auo-benq-solar/)

\- \[Canadian Solar Panels 2025 Expert Review - SolarReviews\](https://www.solarreviews.com/blog/canadian-solar-panels-expert-review)

\- \[Tier 1 List of Solar Panel Manufacturers Q2 2026 - Vico Export\](https://www.vicoexport.com/en/67499/tier-1-list-of-solar-panel-manufacturers-q2-2026/)

\- \[Canadian Solar TOPHiKu6 TOPCon 455W panel - CSE Solar USA\](https://csesolarusa.com/product/canadian-solar-tophiku6-cs6-1-54tm-455h-455w-black-on-black-1-pallet-31pc/)

\- \[Canadian Solar Inc. - Form 6-K FY2025 (SEC filing, capacity data)\](https://www.sec.gov/Archives/edgar/data/0001375877/000110465925081168/tm2524077d1\_ex99-1.htm)

Written by claude-sonnet from the figures above.


## Other comparisons

- [AU Optronics vs A.B. Energy](https://comparepv.com/au-optronics-vs-a-b-energy)
- [AE Solar vs Canadian Solar](https://comparepv.com/ae-solar-vs-canadian-solar)
- [AU Optronics vs AEET](https://comparepv.com/au-optronics-vs-aeet)
- [AIKO vs Canadian Solar](https://comparepv.com/aiko-vs-canadian-solar)
- [AU Optronics vs AKCOME](https://comparepv.com/au-optronics-vs-akcome)
- [ARTsolar vs Canadian Solar](https://comparepv.com/artsolar-vs-canadian-solar)


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Source: https://comparepv.com/au-optronics-vs-canadian-solar

Not in this file, on the page: the distributions above drawn as charts.