---
title: "AU Optronics vs Tongwei - Brand Comparison | ComparePV"
description: "Compare AU Optronics vs Tongwei solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/au-optronics-vs-tongwei"
image: "https://comparepv.com/og/compare/manufacturers/au-optronics/tongwei.png"
---

# AU Optronics vs Tongwei

Tongwei has the broader catalog (122 vs 1 models). Tongwei leads on peak efficiency at 24.20%. Tongwei leans bifacial (69% of lineup).


## The two companies


| Attribute | AU Optronics | Tongwei |
| --- | --- | --- |
| Country | Taiwan | China |
| Headquarters | Hsinchu | Chengdu |
| Founded | 1996 | 2013 |
| Employees | 41000+ |  |
| Annual capacity |  |  |
| Tier 1 | yes | yes |
| Listed | TWSE (Taiwan Stock Exchange): 2409 | SSE: 600438 |
| Website | [https://www.auo.com/en-global](https://www.auo.com/en-global) | [https://en.tongwei.com.cn](https://en.tongwei.com.cn) |

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...


## Catalog & Power


| Measure | AU Optronics | Tongwei | Margin |
| --- | --- | --- | --- |
| Panel Models | 1 | 122 | +121 |
| Max Power | 170 W | 750 W | +580 W |
| Avg Power | 170 W | 584 W | +414 W |


## Efficiency


| Measure | AU Optronics | Tongwei | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 16.00% | 24.20% | +8.20 pp |
| Avg Efficiency | 16.00% | 22.59% | +6.59 pp |


## Reliability & Warranty


| Measure | AU Optronics | Tongwei | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.438%/°C | -0.284%/°C | +0.154 |
| Bifacial Share | 0 (0%) | 84 (69%) | +69 pp |
| Avg Warranty | - | 29.5 yrs |  |


## Efficiency distribution

Tongwei skews to higher efficiency: 41% of lineup is 23%+


| Efficiency band | AU Optronics | Tongwei |
| --- | --- | --- |
| \<20% | 1 (100.0%) | 2 (1.6%) |
| 20-21% | 0 | 6 (4.9%) |
| 21-22% | 0 | 14 (11.5%) |
| 22-23% | 0 | 50 (41.0%) |
| 23%+ | 0 | 50 (41.0%) |


## Power distribution

Tongwei offers more 600W+ panels (53% of lineup)


| Power band | AU Optronics | Tongwei |
| --- | --- | --- |
| \<400W | 1 (100.0%) | 0 |
| 400-499W | 0 | 41 (33.6%) |
| 500-599W | 0 | 16 (13.1%) |
| 600-699W | 0 | 33 (27.0%) |
| 700W+ | 0 | 32 (26.2%) |


## Cell technology

Dominant cell tech: TOPCon (47%)


| Technology | AU Optronics | Tongwei |
| --- | --- | --- |
| Unknown | 1 (100.0%) | 6 (4.9%) |
| TOPCon | 0 | 57 (46.7%) |
| N-type | 0 | 44 (36.1%) |
| PERC | 0 | 10 (8.2%) |
| HJT | 0 | 5 (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, Tongwei


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TWMNF-66HD750](https://comparepv.com/panel/tongwei-solar-twmnf-66hd750) | 750 | 24.1 | -0.280 | Monocrystalline |
| 2 | [TWMNF-66HD745](https://comparepv.com/panel/tongwei-solar-twmnf-66hd745) | 745 | 24.0 | -0.280 | Monocrystalline |
| 3 | [TWMNF-66HD740](https://comparepv.com/panel/tongwei-solar-twmnf-66hd740) | 740 | 23.8 | -0.280 | Monocrystalline |
| 4 | [TWMHF-66HD740X](https://comparepv.com/panel/tw-solar-twmhf-66hd740x) | 740 | 23.8 | -0.240 | Monocrystalline |
| 5 | [THC G12-66 Bifacial](https://comparepv.com/panel/tongwei-thc-g12-66-bifacial) | 740 | 23.8 | -0.280 | Monocrystalline |
| 6 | [TWMNF-66HD735](https://comparepv.com/panel/tongwei-solar-twmnf-66hd735) | 735 | 23.7 | -0.280 | Monocrystalline |
| 7 | [TWMHF-66HD735X](https://comparepv.com/panel/tw-solar-twmhf-66hd735x) | 735 | 23.7 | -0.240 | Monocrystalline |
| 8 | [TWMHF-66HD730X](https://comparepv.com/panel/tw-solar-twmhf-66hd730x) | 730 | 23.5 | -0.240 | Monocrystalline |
| 9 | [TWMNF-66HD730](https://comparepv.com/panel/tongwei-solar-twmnf-66hd730) | 730 | 23.5 | -0.280 | Monocrystalline |
| 10 | [TWMNF-66HD725](https://comparepv.com/panel/tongwei-solar-twmnf-66hd725) | 725 | 23.3 | -0.280 | Monocrystalline |


## Other comparisons

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


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Source: https://comparepv.com/au-optronics-vs-tongwei

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