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

# AU Optronics vs Runtech China

Runtech China has the broader catalog (21 vs 1 models). Runtech China leads on peak efficiency at 24.30%.


## The two companies


| Attribute | AU Optronics | Runtech China |
| --- | --- | --- |
| Country | Taiwan | China |
| Headquarters | Hsinchu | Xi'an |
| Founded | 1996 | 2008 |
| Employees | 41000+ | 50+ |
| Annual capacity |  |  |
| Tier 1 | yes |  |
| Listed | TWSE (Taiwan Stock Exchange): 2409 |  |
| Website | [https://www.auo.com/en-global](https://www.auo.com/en-global) | [http://www.runtechenergy.com](http://www.runtechenergy.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...

Runtech Energy, founded in 2008, is a leading independent solar production supplier and designer. They are a trader of solar modules and PV project developer, with over 500MW of premium quality modules deployed worldwide. Runtech is committed to providing high-quality solar products and system integration services.


## Catalog & Power


| Measure | AU Optronics | Runtech China | Margin |
| --- | --- | --- | --- |
| Panel Models | 1 | 21 | +20 |
| Max Power | 170 W | 420 W | +250 W |
| Avg Power | 170 W | 301 W | +131 W |


## Efficiency


| Measure | AU Optronics | Runtech China | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 16.00% | 24.30% | +8.30 pp |
| Avg Efficiency | 16.00% | 18.59% | +2.59 pp |


## Reliability & Warranty


| Measure | AU Optronics | Runtech China | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.438%/°C | -0.350%/°C | +0.088 |
| Bifacial Share | 0 (0%) | 1 (5%) | +5 pp |
| Avg Warranty | - | 25.0 yrs |  |


## Efficiency distribution

Runtech China skews to higher efficiency: 5% of lineup is 23%+


| Efficiency band | AU Optronics | Runtech China |
| --- | --- | --- |
| \<20% | 1 (100.0%) | 13 (61.9%) |
| 20-21% | 0 | 4 (19.0%) |
| 21-22% | 0 | 3 (14.3%) |
| 23%+ | 0 | 1 (4.8%) |


## Power distribution


| Power band | AU Optronics | Runtech China |
| --- | --- | --- |
| \<400W | 1 (100.0%) | 16 (76.2%) |
| 400-499W | 0 | 5 (23.8%) |


## Cell technology


| Technology | AU Optronics | Runtech China |
| --- | --- | --- |
| Unknown | 1 (100.0%) | 21 (100.0%) |


## 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, Runtech China


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [RT420WM](https://comparepv.com/panel/runtech-china-rt420wm) | 420 | 21.6 | -0.350 | Monocrystalline |
| 2 | [RT415WM](https://comparepv.com/panel/runtech-china-rt415wm) | 415 | 21.3 | -0.350 | Monocrystalline |
| 3 | [RT410WM](https://comparepv.com/panel/runtech-china-rt410wm) | 410 | 21.0 | -0.350 | Monocrystalline |
| 4 | [RT405WM](https://comparepv.com/panel/runtech-china-rt405wm) | 405 | 20.8 | -0.350 | Monocrystalline |
| 5 | [RT400WM](https://comparepv.com/panel/runtech-china-rt400wm) | 400 | 20.5 | -0.350 | Monocrystalline |
| 6 | [RT395WM](https://comparepv.com/panel/runtech-china-rt395wm) | 395 | 20.2 | -0.350 | Monocrystalline |
| 7 | [RT390WM](https://comparepv.com/panel/runtech-china-rt390wm) | 390 | 20.0 | -0.350 | Monocrystalline |
| 8 | [RT-355M](https://comparepv.com/panel/runtech-china-rt-355m) | 355 | 18.5 | -0.410 | Polycrystalline |
| 9 | [RT 355M](https://comparepv.com/panel/runtech-china-rt-355m-1) | 355 | 18.5 | -0.410 | Polycrystalline |
| 10 | [RT-350M](https://comparepv.com/panel/runtech-china-rt-350m) | 350 | 18.0 | -0.410 | Polycrystalline |


## Summary

I have enough sourced information to write a qualitative, hedged comparison given the limited independent coverage, especially for Runtech China.

AU Optronics, now operating as AUO Corporation, is a Taiwanese electronics group headquartered in Hsinchu that was founded in 1996 and rose to prominence as one of the world's major TFT-LCD display manufacturers before diversifying into solar energy, establishing a dedicated Solar Photovoltaic Business Unit in 2009 and later creating subsidiaries for solar plant operation. Its solar activities span upstream and midstream production, including polysilicon, ingots, wafers and cells, in addition to finished modules, reflecting the vertically integrated manufacturing base typical of a large industrial conglomerate. Runtech China, by contrast, is a much smaller operation headquartered in Xi'an with a factory reportedly in Changzhou, Jiangsu, offering OEM/ODM module production at an annual capacity in the range of a few hundred megawatts, a scale several orders below the gigawatt-class output associated with globally recognized Tier 1 brands. Independent sources could not confirm Tier 1 or BloombergNEF bankability status for either company, so neither should be assumed to carry that designation without direct verification against BloombergNEF's current list; however, AUO's decades-long industrial history, broader supply chain integration, and established presence in Taiwan's electronics sector give it a materially stronger institutional footprint than Runtech China, which appears to function more as a smaller-scale manufacturer and distributor.

In terms of product focus, AUO's solar division has historically served both module supply and solar power plant development, suggesting a product mix oriented toward commercial and utility-scale deployment backed by its own vertically integrated cell and wafer production, though detailed current datasheets were not readily available in public searches. Runtech China's listed catalog spans a wide range of monocrystalline and polycrystalline modules from very small wattages up to around 600-630 W, positioning it more as a flexible OEM/ODM supplier for smaller commercial or budget-oriented projects rather than a brand with a defined flagship technology platform; no confirmed information surfaced regarding its use of TOPCon, HJT, or other advanced cell technologies, so its technology mix should be treated as unverified.

Given the limited independent verification available for Runtech China, including inconsistent or outdated company information and no confirmed bankability status, a typical buyer in 2025 seeking a dependable, well-documented option would generally be better served by AU Optronics or its AUO Corporation solar arm, given its longer track record, larger industrial base, and more extensive public documentation. Runtech China may still suit niche OEM or smaller regional procurement needs, but buyers should request current certifications and financial documentation directly rather than relying on legacy online listings.

\---LINKS---

\- https://www.vicoexport.com/en/61277/tier-1-list-of-solar-panel-manufacturers-q2-2025/ \| Tier 1 List of Solar Panel Manufacturers Q2 2025 \| article

\- https://en.wikipedia.org/wiki/List\_of\_photovoltaics\_companies \| List of photovoltaics companies (industry reference) \| article

\- https://www.enfsolar.com/runtech-china \| Runtech China Co., Ltd. company and product profile \| article

\- https://tracxn.com/d/companies/runtechsolarpanels/\_\_MjXSLiy3Y4\_LEq2rtZ-BgbU4g8BD40ihsW8zZtRV2sM \| Runtech Solar Panels - Company Profile & Competitors \| article

Written by claude-sonnet-5 from the figures above.


## Other comparisons

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


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Source: https://comparepv.com/au-optronics-vs-runtech-china

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