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

# JA Solar vs Kingdom

JA Solar has the broader catalog (504 vs 3 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | Kingdom |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Hefei |
| Founded | 2005 | 2010 |
| Employees | 37,289 | 100 |
| 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.kdmsolar.com](https://www.kdmsolar.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...

Kingdom Solar (also known as KDM Kingdom Solar) is a Chinese solar module manufacturer based in Hefei, Anhui Province. The company produces monocrystalline solar panels for residential and commercial applications.


## Catalog & Power


| Measure | JA Solar | Kingdom | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 3 | +501 |
| Max Power | 740 W | 590 W | +150 W |
| Avg Power | 456 W | 533 W | +77 W |


## Efficiency


| Measure | JA Solar | Kingdom | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 22.80% | +2.00 pp |
| Avg Efficiency | 21.13% | 22.46% | +1.32 pp |


## Reliability & Warranty


| Measure | JA Solar | Kingdom | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.290%/°C | +0.032 |
| Bifacial Share | 238 (47%) | 0 (0%) | +47 pp |
| Avg Warranty | 27.9 yrs | 30.0 yrs | +2.1 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | Kingdom |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 0 |
| 21-22% | 112 (22.2%) | 0 |
| 22-23% | 107 (21.2%) | 3 (100.0%) |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

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


| Power band | JA Solar | Kingdom |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 0 |
| 400-499W | 173 (34.3%) | 1 (33.3%) |
| 500-599W | 120 (23.8%) | 2 (66.7%) |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **N-type** (100%)


| Technology | JA Solar | Kingdom |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 3 (100.0%) |
| 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 |


## Top panels, Kingdom


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [KD-M590-144-N](https://comparepv.com/panel/kingdom-kd-m590-144-n) | 590 | 22.8 | -0.290 | Monocrystalline |
| 2 | [KD-M570-144-N](https://comparepv.com/panel/kingdom-kd-m570-144-n) | 570 | 22.1 | -0.290 | Monocrystalline |
| 3 | [KD-M440-108-N](https://comparepv.com/panel/kingdom-kd-m440-108-n-1) | 440 | 22.5 | -0.290 | Monocrystalline |


## Summary

JA Solar, founded in 2005 and headquartered in China, is one of the world's largest solar module manufacturers, with a production capacity exceeding 100 GW per year and a workforce of approximately 37,300 employees. Listed on the Shenzhen Stock Exchange (SZSE), the company holds Tier 1 bankable status, making it a recognized partner for project finance across all major markets. JA Solar has a broad international footprint, with module shipments covering Europe, the Americas, and Asia-Pacific - including large-scale engagements such as a 240 MW module supply agreement for a solar power plant in Bulgaria. Kingdom (Zhejiang Kingdom Solar Energy Technic Co., Ltd.), founded in 2010, is a substantially smaller operation with around 100 employees and a stated annual production capacity of 1 GW. It is not Tier 1 rated and does not appear in major international module review databases with independently assessed product listings, which limits the ability to evaluate its products against verifiable benchmarks.

JA Solar's portfolio spans 524 panel models, with a maximum output of 740 Wp and a peak module efficiency of 24.4%. PERC technology dominates the lineup at approximately 52% of the range, while the company is actively expanding its n-type TOPCon offering through the DeepBlue 4.0 Pro and DeepBlue 5.0 series, with efficiencies reaching up to 23.3%. With 44.3% of its portfolio comprising bifacial modules and an average warranty of approximately 27.9 years, JA Solar is well-positioned for residential rooftop installs, commercial C&I projects, and utility-scale ground-mount deployments. It achieved PVEL Top Performer status for the tenth consecutive time in 2025. Kingdom holds basic certifications - TUV, CE, ISO, and J-PEC - indicating compliance with foundational quality standards, but the absence of publicly reviewed performance data makes it difficult to assess for specific project suitability.

For international buyers - whether residential owners, commercial operators, or utility developers - JA Solar presents a clear and well-documented advantage in terms of product breadth, financial bankability, and independently verified reliability. Kingdom may be considered for highly cost-sensitive, small-scale applications where Tier 1 status and lender approval are not requirements, but the lack of reviewed performance data introduces meaningful uncertainty. In any project where long-term warranty enforcement, project finance, or due diligence matters, JA Solar is the substantially stronger choice.

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 Kingdom](https://comparepv.com/ae-solar-vs-kingdom-solar)
- [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet)
- [AIKO vs Kingdom](https://comparepv.com/aiko-vs-kingdom-solar)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs Kingdom](https://comparepv.com/artsolar-vs-kingdom-solar)


---

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

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