---
title: "JA Solar vs YS Solar - Brand Comparison | ComparePV"
description: "Compare JA Solar vs YS Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/ja-solar-vs-ys-solar"
---

# JA Solar vs YS Solar

JA Solar has the broader catalog (504 vs 5 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | YS Solar |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Meizhou City, Guangdong Province |
| Founded | 2005 | 2009 |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes |  |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [http://www.ys-solar.com/](http://www.ys-solar.com/) |

JA Solar is a global leader in the manufacturing of high-performance photovoltaic products. Founded in 2005, the company designs, develops, manufactures, and sells solar cells and modules. JA Solar's products are used in ground-mounted power plants, commercial & industrial rooftop PV systems, and residential rooftop...

Guangdong Yaosheng Solar Technology Co., Ltd. (YS SOLAR) is a national high-tech enterprise specializing in the R&D, production, sales, and service of photovoltaic and solar thermal products. The company is a wholly-owned subsidiary of Guangdong Yaosheng-Yifang Group. YS Solar has become a leading enterprise in the...


## Catalog & Power


| Measure | JA Solar | YS Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 5 | +499 |
| Max Power | 740 W | 350 W | +390 W |
| Avg Power | 456 W | 340 W | +116 W |


## Efficiency


| Measure | JA Solar | YS Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 21.00% | +3.80 pp |
| Avg Efficiency | 21.13% | 20.40% | +0.73 pp |


## Reliability & Warranty


| Measure | JA Solar | YS Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.350%/°C | +0.028 |
| Bifacial Share | 238 (47%) | 0 (0%) | +47 pp |
| Avg Warranty | 27.9 yrs | - |  |


## Efficiency distribution

JA Solar skews to higher efficiency: 15% of lineup is 23%+


| Efficiency band | JA Solar | YS Solar |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 1 (20.0%) |
| 20-21% | 99 (19.6%) | 3 (60.0%) |
| 21-22% | 112 (22.2%) | 1 (20.0%) |
| 22-23% | 107 (21.2%) | 0 |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

JA Solar offers more 600W+ panels (14% of lineup)


| Power band | JA Solar | YS Solar |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 5 (100.0%) |
| 400-499W | 173 (34.3%) | 0 |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

Dominant cell tech: **PERC** (49%)


| Technology | JA Solar | YS Solar |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 5 (100.0%) |
| HJT | 5 (1.0%) | 0 |


## Top panels, JA Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [JAM66D46-740/LB](https://comparepv.com/panel/ja-solar-jam66d46-740-lb) | 740 | 23.8 | -0.290 | Monocrystalline |
| 2 | [JAM66D46-735/LB](https://comparepv.com/panel/ja-solar-jam66d46-735-lb) | 735 | 23.7 | -0.290 | Monocrystalline |
| 3 | [JAM66D46-730/LB](https://comparepv.com/panel/ja-solar-jam66d46-730-lb) | 730 | 23.5 | -0.290 | Monocrystalline |
| 4 | [JAM66D46-725/LB](https://comparepv.com/panel/ja-solar-jam66d46-725-lb) | 725 | 23.3 | -0.290 | Monocrystalline |
| 5 | [JAM66D46-720/LB](https://comparepv.com/panel/ja-solar-jam66d46-720-lb) | 720 | 23.2 | -0.290 | Monocrystalline |
| 6 | [JAM66D46-715/LB](https://comparepv.com/panel/ja-solar-jam66d46-715-lb) | 715 | 23.0 | -0.290 | Monocrystalline |
| 7 | [JAM66D46-710/LB](https://comparepv.com/panel/ja-solar-jam66d46-710-lb) | 710 | 22.9 | -0.290 | Monocrystalline |
| 8 | [JAM66D46-705/LB](https://comparepv.com/panel/ja-solar-jam66d46-705-lb) | 705 | 22.7 | -0.290 | Monocrystalline |
| 9 | [JAM66D46-700/LB](https://comparepv.com/panel/ja-solar-jam66d46-700-lb) | 700 | 22.5 | -0.290 | Monocrystalline |
| 10 | [JAM66D46-695/LB](https://comparepv.com/panel/ja-solar-jam66d46-695-lb) | 695 | 22.4 | -0.290 | Monocrystalline |


## Top panels, YS Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [YS350SM-90](https://comparepv.com/panel/ys-solar-ys350sm-90) | 350 | 21.0 | -0.350 | Monocrystalline |
| 2 | [YS345SM-90](https://comparepv.com/panel/ys-solar-ys345sm-90) | 345 | 20.7 | -0.350 | Monocrystalline |
| 3 | [YS340SM-90](https://comparepv.com/panel/ys-solar-ys340sm-90) | 340 | 20.4 | -0.350 | Monocrystalline |
| 4 | [YS335SM-90](https://comparepv.com/panel/ys-solar-ys335sm-90) | 335 | 20.1 | -0.350 | Monocrystalline |
| 5 | [YS330SM-90](https://comparepv.com/panel/ys-solar-ys330sm-90) | 330 | 19.8 | -0.350 | Monocrystalline |


## Summary

JA Solar, founded in 2005 and headquartered in China, is one of the world's largest solar module manufacturers, with over 37,000 employees and a total production capacity exceeding 100 GW. The company is listed on the Shenzhen Stock Exchange (SZSE) and holds confirmed Tier 1 bankable status recognized by Bloomberg and S&P Global Commodity Insights - a designation reflecting financial credibility for project financing. JA Solar jointly topped Wood Mackenzie's Global Solar Module Manufacturer Ranking for H1 2025 and earned PVEL Top Performer status for the tenth consecutive time. YS Solar (Guangdong Yaosheng Solar Technology Co., Ltd.) is a considerably smaller Chinese manufacturer, founded in 2009. With only 5 panel models in its portfolio, a maximum output of 350 Wp, unspecified cell technology, and no Tier 1 listing or stock exchange presence, YS Solar operates at a significantly lower tier in terms of market reach, financial backing, and publicly verifiable product data.

JA Solar's portfolio of 524 panel models spans a wide range of applications. Its bifacial modules - representing approximately 44% of the lineup - are well suited to utility-scale ground-mount projects and commercial C&I installations, while its standard monofacial PERC modules cover residential rooftop installs effectively. Maximum efficiency reaches 24.4%, average efficiency sits at 20.87%, average warranty coverage approaches 28 years, and the average temperature coefficient of -0.32%/°C is a measurable advantage under warm operating conditions. The expanding TOPCon line under the DeepBlue 4.0 Pro and DeepBlue 5.0 series adds further options for high-yield projects. YS Solar's five models are all monofacial, peak at 350 Wp and 21% efficiency, and carry a slightly less favorable temperature coefficient of -0.35%/°C, limiting the portfolio to small-scale or low-budget residential use cases.

For international buyers - EPC contractors, procurement managers, or independent installers - JA Solar is the well-supported choice across all project scales, backed by a global supply chain, extensive third-party reliability testing, and strong bankability credentials. YS Solar may be considered only in highly cost-sensitive scenarios where the buyer has direct means of independently verifying product quality, given the absence of publicly available Tier 1 certification and limited market transparency.

Written by claude-sonnet from the figures above.


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Source: https://comparepv.com/ja-solar-vs-ys-solar

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