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

# JA Solar vs SunKean

JA Solar has the broader catalog (504 vs 57 models). JA Solar leads on peak efficiency at 24.80%. SunKean leans bifacial (77% of lineup).


## The two companies


| Attribute | JA Solar | SunKean |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Wuxi, Jiangsu |
| Founded | 2005 | 2013 |
| Employees | 37,289 | 200+ |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes |  |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.sunkean.com](https://www.sunkean.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...

SUNKEAN specializes in providing sustainable energy connection solutions to global customers. They offer a range of products including solar cables, wire harnesses, and related connectors for photovoltaic, energy storage, and charging sectors. As of 2025, SUNKEAN employs over 200 people and operates a production...


## Catalog & Power


| Measure | JA Solar | SunKean | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 57 | +447 |
| Max Power | 740 W | 700 W | +40 W |
| Avg Power | 456 W | 447 W | +9 W |


## Efficiency


| Measure | JA Solar | SunKean | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.52% | +1.28 pp |
| Avg Efficiency | 21.13% | 21.25% | +0.11 pp |


## Reliability & Warranty


| Measure | JA Solar | SunKean | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.300%/°C | +0.022 |
| Bifacial Share | 238 (47%) | 44 (77%) | +30 pp |
| Avg Warranty | 27.9 yrs | 28.9 yrs | +1.1 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | SunKean |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 9 (15.8%) |
| 20-21% | 99 (19.6%) | 7 (12.3%) |
| 21-22% | 112 (22.2%) | 16 (28.1%) |
| 22-23% | 107 (21.2%) | 20 (35.1%) |
| 23%+ | 74 (14.7%) | 5 (8.8%) |


## Power distribution

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


| Power band | JA Solar | SunKean |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 11 (19.3%) |
| 400-499W | 173 (34.3%) | 35 (61.4%) |
| 500-599W | 120 (23.8%) | 6 (10.5%) |
| 600-699W | 60 (11.9%) | 4 (7.0%) |
| 700W+ | 9 (1.8%) | 1 (1.8%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (39%)


| Technology | JA Solar | SunKean |
| --- | --- | --- |
| PERC | 247 (49.0%) | 13 (22.8%) |
| TOPCon | 146 (29.0%) | 22 (38.6%) |
| N-type | 90 (17.9%) | 8 (14.0%) |
| Unknown | 16 (3.2%) | 0 |
| HJT | 5 (1.0%) | 14 (24.6%) |


## 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, SunKean


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [SKT700M12-132D5](https://comparepv.com/panel/sunkean-skt700m12-132d5) | 700 | 22.5 | -0.260 | Monocrystalline |
| 2 | [SKT695M12-132D5](https://comparepv.com/panel/sunkean-skt695m12-132d5) | 695 | 22.4 | -0.260 | Monocrystalline |
| 3 | [SKT690M12-132D5](https://comparepv.com/panel/sunkean-skt690m12-132d5) | 690 | 22.2 | -0.260 | Monocrystalline |
| 4 | [SKT685M12-132D5](https://comparepv.com/panel/sunkean-skt685m12-132d5) | 685 | 22.1 | -0.260 | Monocrystalline |
| 5 | [SKT680M12-132D5](https://comparepv.com/panel/sunkean-skt680m12-132d5) | 680 | 21.9 | -0.260 | Monocrystalline |
| 6 | [SKT555M10](https://comparepv.com/panel/sunkean-skt555m10) | 555 | 21.5 | -0.350 | Monocrystalline |
| 7 | [SKT550M10](https://comparepv.com/panel/sunkean-skt550m10) | 550 | 21.3 | -0.350 | Monocrystalline |
| 8 | [SKT545M10](https://comparepv.com/panel/sunkean-skt545m10) | 545 | 21.1 | -0.350 | Monocrystalline |
| 9 | [SKT540M10](https://comparepv.com/panel/sunkean-skt540m10) | 540 | 20.9 | -0.350 | Monocrystalline |
| 10 | [SKT535M10](https://comparepv.com/panel/sunkean-skt535m10) | 535 | 20.7 | -0.350 | Monocrystalline |


## Summary

JA Solar was founded in 2005 and has grown into one of the world's largest solar module manufacturers, employing over 37,000 people and operating production capacity exceeding 100 GW per year. Listed on the Shenzhen Stock Exchange, the company holds Tier 1 bankable status as recognized by both BloombergNEF and S&P Global Commodity Insights, and jointly topped Wood Mackenzie's Global Solar Module Manufacturer Ranking for H1 2025 alongside Trinasolar. SunKean, by contrast, was founded in 2013 and operates at a significantly smaller scale with over 200 employees. The company is not publicly listed and does not hold Tier 1 certification, positioning it as a niche manufacturer rather than a global volume player - though its focused product range reflects deliberate technological choices rather than a lack of ambition.

JA Solar's portfolio of 524 panel models is broad and versatile, with PERC technology leading at 52.1% of the lineup. The portfolio reaches a maximum output of 740 Wp, with an average efficiency of 20.87% and a peak of 24.4%, making it well-suited for residential rooftop installs, utility-scale ground-mount projects, and commercial C&I applications alike. Its 44.3% bifacial share provides flexibility across mounting types. SunKean's 57-module portfolio is more concentrated, with TOPCon as the leading technology at 38.6% of its lineup. SunKean panels deliver a higher average efficiency of 21.25%, a better average temperature coefficient of -0.300%/°C versus JA Solar's -0.323%/°C, a notably higher bifacial ratio of 77.2%, and a slightly longer average warranty of 28.95 years compared to JA Solar's 27.85 years. These characteristics make SunKean modules a competitive option specifically for bifacial ground-mount or commercial C&I projects where rear-side gain and heat tolerance are prioritized.

For international buyers where bankability, supply chain depth, and long-term manufacturer stability are paramount - particularly for project-financed utility-scale or large commercial installations - JA Solar is the clear choice. SunKean presents a technically interesting proposition for buyers seeking modern TOPCon bifacial modules with strong warranty terms and efficiency figures, but the absence of Tier 1 certification and its smaller operational footprint warrant additional due diligence, especially for projects requiring lender approval or long-term performance guarantees.

Written by claude-sonnet from the figures above.


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

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