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

# AU Optronics vs GCL

GCL has the broader catalog (232 vs 1 models). GCL leads on peak efficiency at 24.50%. GCL leans bifacial (65% of lineup).


## The two companies


| Attribute | AU Optronics | GCL |
| --- | --- | --- |
| Country | Taiwan | China |
| Headquarters | Hsinchu | Suzhou/Hong Kong |
| Founded | 1996 | 1990 |
| Employees | 41000+ | 6000+ |
| Annual capacity |  | 30+ GW/year |
| Tier 1 | yes | yes |
| Listed | TWSE (Taiwan Stock Exchange): 2409 | Hong Kong Stock Exchange/Shenzhen Stock Exchange: 03800.HK/002506.SZ |
| Website | [https://www.auo.com/en-global](https://www.auo.com/en-global) | [http://www.gcltech.com/](http://www.gcltech.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...

GCL is a global company focusing on green energy and high-efficiency photovoltaic materials. They are known for their innovation in polysilicon and wafer technologies, with a focus on low-carbon solutions. GCL is committed to building a low-carbon PV value chain and advancing global clean energy transformation.


## Catalog & Power


| Measure | AU Optronics | GCL | Margin |
| --- | --- | --- | --- |
| Panel Models | 1 | 232 | +231 |
| Max Power | 170 W | 740 W | +570 W |
| Avg Power | 170 W | 558 W | +388 W |


## Efficiency


| Measure | AU Optronics | GCL | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 16.00% | 24.50% | +8.50 pp |
| Avg Efficiency | 16.00% | 22.03% | +6.03 pp |


## Reliability & Warranty


| Measure | AU Optronics | GCL | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.438%/°C | -0.320%/°C | +0.118 |
| Bifacial Share | 0 (0%) | 151 (65%) | +65 pp |
| Avg Warranty | - | 28.4 yrs |  |


## Efficiency distribution

GCL skews to higher efficiency: 28% of lineup is 23%+


| Efficiency band | AU Optronics | GCL |
| --- | --- | --- |
| \<20% | 1 (100.0%) | 2 (0.9%) |
| 20-21% | 0 | 43 (18.5%) |
| 21-22% | 0 | 73 (31.5%) |
| 22-23% | 0 | 48 (20.7%) |
| 23%+ | 0 | 66 (28.4%) |


## Power distribution

GCL offers more 600W+ panels (44% of lineup)


| Power band | AU Optronics | GCL |
| --- | --- | --- |
| \<400W | 1 (100.0%) | 6 (2.6%) |
| 400-499W | 0 | 60 (25.9%) |
| 500-599W | 0 | 63 (27.2%) |
| 600-699W | 0 | 81 (34.9%) |
| 700W+ | 0 | 22 (9.5%) |


## Cell technology

Dominant cell tech: **TOPCon** (47%)


| Technology | AU Optronics | GCL |
| --- | --- | --- |
| Unknown | 1 (100.0%) | 0 |
| TOPCon | 0 | 108 (46.6%) |
| PERC | 0 | 102 (44.0%) |
| N-type | 0 | 10 (4.3%) |
| HJT | 0 | 7 (3.0%) |
| BIPV | 0 | 5 (2.2%) |


## 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, GCL


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [GCL-NT12/66GDF-740](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-740) | 740 | 23.8 | -0.290 | Monocrystalline |
| 2 | [GCL-NT12/66GDF-735](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-735) | 735 | 23.7 | -0.290 | Monocrystalline |
| 3 | [GCL-NT12/66GDF-730](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-730) | 730 | 23.5 | -0.290 | Monocrystalline |
| 4 | [NT12/66GDF-730](https://comparepv.com/panel/gcl-nt12-66gdf-730) | 730 | 23.5 | -0.290 | Monocrystalline |
| 5 | [GCL-NT12/66GDF-725](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 6 | [NT12/66GDF-725](https://comparepv.com/panel/gcl-nt12-66gdf-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 7 | [GCL-NT12/66GDF 725](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-725-1) | 725 | 23.3 | -0.290 | Monocrystalline |
| 8 | [GCL-NH12/66GDF-720](https://comparepv.com/panel/gcl-gcl-nh12-66gdf-720) | 720 | 23.2 | -0.240 | Monocrystalline |
| 9 | [GCL-NT12/66GDF-720](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-720) | 720 | 23.2 | -0.290 | Monocrystalline |
| 10 | [NT12/66GDF-720](https://comparepv.com/panel/gcl-nt12-66gdf-720) | 720 | 23.2 | -0.290 | Monocrystalline |


## Other comparisons

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


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

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