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

# AU Optronics vs Phono Solar

Phono Solar has the broader catalog (174 vs 1 models). Phono Solar leads on peak efficiency at 23.50%. Phono Solar leans bifacial (43% of lineup).


## The two companies


| Attribute | AU Optronics | Phono Solar |
| --- | --- | --- |
| Country | Taiwan | China |
| Headquarters | Hsinchu | Nanjing |
| Founded | 1996 | 2004 |
| Employees | 41000+ | 13000+ |
| Annual capacity |  | 3-4 GW/year |
| Tier 1 | yes | yes |
| Listed | TWSE (Taiwan Stock Exchange): 2409 |  |
| Website | [https://www.auo.com/en-global](https://www.auo.com/en-global) | [https://www.phonosolar.com](https://www.phonosolar.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...

Phono Solar Technology Co., Ltd. specializes in the research, development, and manufacture of photovoltaic solar panels and is a global provider of solar products and services. The company is affiliated with SUMEC Group, a subsidiary of China National Machinery Industry Corporation (SINOMACH). Phono Solar has been...


## Catalog & Power


| Measure | AU Optronics | Phono Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 1 | 174 | +173 |
| Max Power | 170 W | 730 W | +560 W |
| Avg Power | 170 W | 515 W | +345 W |


## Efficiency


| Measure | AU Optronics | Phono Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 16.00% | 23.50% | +7.50 pp |
| Avg Efficiency | 16.00% | 21.77% | +5.77 pp |


## Reliability & Warranty


| Measure | AU Optronics | Phono Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.438%/°C | -0.306%/°C | +0.132 |
| Bifacial Share | 0 (0%) | 74 (43%) | +43 pp |
| Avg Warranty | - | 27.1 yrs |  |


## Efficiency distribution

Phono Solar skews to higher efficiency: 11% of lineup is 23%+


| Efficiency band | AU Optronics | Phono Solar |
| --- | --- | --- |
| \<20% | 1 (100.0%) | 3 (1.7%) |
| 20-21% | 0 | 37 (21.3%) |
| 21-22% | 0 | 53 (30.5%) |
| 22-23% | 0 | 62 (35.6%) |
| 23%+ | 0 | 19 (10.9%) |


## Power distribution

Phono Solar offers more 600W+ panels (20% of lineup)


| Power band | AU Optronics | Phono Solar |
| --- | --- | --- |
| \<400W | 1 (100.0%) | 10 (5.7%) |
| 400-499W | 0 | 78 (44.8%) |
| 500-599W | 0 | 51 (29.3%) |
| 600-699W | 0 | 23 (13.2%) |
| 700W+ | 0 | 12 (6.9%) |


## Cell technology

Dominant cell tech: **PERC** (37%)


| Technology | AU Optronics | Phono Solar |
| --- | --- | --- |
| Unknown | 1 (100.0%) | 0 |
| PERC | 0 | 65 (37.4%) |
| TOPCon | 0 | 53 (30.5%) |
| N-type | 0 | 50 (28.7%) |
| HJT | 0 | 5 (2.9%) |
| Back Contact | 0 | 1 (0.6%) |


## 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, Phono Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [PS730M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps730m13gfh-22-wshw) | 730 | 23.5 | -0.240 | Monocrystalline |
| 2 | [NS-730MH-132](https://comparepv.com/panel/phono-solar-ns-730mh-132) | 730 | 23.5 | -0.290 | Monocrystalline |
| 3 | [PS725M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps725m13gfh-22-wshw) | 725 | 23.3 | -0.240 | Monocrystalline |
| 4 | [PS720M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps720m13gfh-22-wshw) | 720 | 23.2 | -0.240 | Monocrystalline |
| 5 | [NS-720MH-132](https://comparepv.com/panel/phono-solar-ns-720mh-132) | 720 | 23.2 | -0.290 | Monocrystalline |
| 6 | [PS715M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps715m13gfh-22-wshw) | 715 | 23.0 | -0.240 | Monocrystalline |
| 7 | [PS710M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps710m13gfh-22-wnh) | 710 | 22.9 | -0.290 | Monocrystalline |
| 8 | [PS710M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps710m13gfh-22-wshw) | 710 | 22.9 | -0.240 | Monocrystalline |
| 9 | [NS-710MH-132](https://comparepv.com/panel/phono-solar-ns-710mh-132) | 710 | 22.9 | -0.290 | Monocrystalline |
| 10 | [PS705M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps705m13gfh-22-wnh) | 705 | 22.7 | -0.290 | Monocrystalline |


## Other comparisons

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


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

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