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

# JA Solar vs Topsky Energy

JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | Topsky Energy |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Shenzhen |
| Founded | 2005 | 1998 |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year | \<1 GW/year |
| Tier 1 | yes | no |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.topskyenergy.com](https://www.topskyenergy.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...

Shenzhen Topsky Energy Co., Ltd. is a Chinese manufacturer of solar cells and photovoltaic modules, including lightweight and customized panels. The company operates production facilities in Zhejiang and Jiangsu provinces, with sales and marketing based in Shenzhen and Hong Kong. Its products are distributed to over...


## Catalog & Power


| Measure | JA Solar | Topsky Energy | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 0 | +504 |
| Max Power | 740 W | 0 W | +740 W |
| Avg Power | 456 W | 0 W | +456 W |


## Efficiency


| Measure | JA Solar | Topsky Energy | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | - |  |
| Avg Efficiency | 21.13% | - |  |


## Reliability & Warranty


| Measure | JA Solar | Topsky Energy | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | - |  |
| 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 | Topsky Energy |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 0 |
| 21-22% | 112 (22.2%) | 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 | Topsky Energy |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 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 | Topsky Energy |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 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 |


## Summary

JA Solar, founded in 2005 and headquartered in China, ranks among the world's leading solar module manufacturers. By the end of 2024, the company had surpassed 100 GW of total production capacity and employs more than 37,000 people globally. Listed on the Shenzhen Stock Exchange (SZSE), JA Solar holds Tier 1 bankable status from both S&P Global Commodity Insights and BloombergNEF, and jointly topped Wood Mackenzie's global solar module manufacturer ranking for the first half of 2025, with cumulative global shipments approaching 300 GW. Topsky Energy, founded in 1998 and based in Shenzhen, operates on a substantially smaller scale with a production capacity of less than 1 GW. The company does not hold Tier 1 bankable status, and independent market data on its current product portfolio and financial standing is very limited. Its modules carry TÜV Rhineland certification and CE marking, and the company claims a commercial footprint across more than 150 countries.

JA Solar's portfolio spans 524 panel models, with maximum output reaching 740 Wp and peak efficiency of 24.4%. The average efficiency across the range sits at approximately 20.9%, with an average temperature coefficient of -0.32%/°C and around 44% of models offering bifacial capability. Average warranty coverage across the portfolio is nearly 28 years. The dominant cell technology is PERC at 52% of the range, with TOPCon gaining ground in newer product lines. This depth makes JA Solar well suited to utility-scale ground-mount projects that require bankable, financeable suppliers, commercial and industrial rooftop installations where project finance is involved, and residential rooftop installs where long-term warranty security and brand reliability matter. Topsky Energy's certified product range reportedly covers monocrystalline modules including PERC and TOPCon variants, but the absence of panel-level data in independent databases and the lack of Tier 1 classification make it difficult to assess real-world performance positioning objectively.

For international buyers selecting modules for a financed utility project, a commercial rooftop installation, or a residential system, JA Solar presents a clear advantage in bankability, technology breadth, warranty security, and verified global market standing. Topsky Energy may be considered for off-grid or highly cost-sensitive applications where Tier 1 status is not a prerequisite, but buyers should carefully weigh the limited independent performance data and significantly smaller corporate scale when evaluating long-term manufacturer support risk.

Written by claude-sonnet from the figures above.


## Other comparisons

- [JA Solar vs A.B. Energy](https://comparepv.com/ja-solar-vs-a-b-energy)
- [AE Solar vs Topsky Energy](https://comparepv.com/ae-solar-vs-topsky-energy)
- [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet)
- [AIKO vs Topsky Energy](https://comparepv.com/aiko-vs-topsky-energy)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs Topsky Energy](https://comparepv.com/artsolar-vs-topsky-energy)


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Source: https://comparepv.com/ja-solar-vs-topsky-energy

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