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

# GCL vs JA Solar

JA Solar has the broader catalog (504 vs 232 models). JA Solar leads on peak efficiency at 24.80%. GCL leans bifacial (65% of lineup).


## The two companies


| Attribute | GCL | JA Solar |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Suzhou/Hong Kong | Beijing |
| Founded | 1990 | 2005 |
| Employees | 6000+ | 37,289 |
| Annual capacity | 30+ GW/year | 100+ GW/year |
| Tier 1 | yes | yes |
| Listed | Hong Kong Stock Exchange/Shenzhen Stock Exchange: 03800.HK/002506.SZ | SZSE: 002459 |
| Website | [http://www.gcltech.com/](http://www.gcltech.com/) | [https://www.jasolar.com](https://www.jasolar.com) |

GCL is a global company focusing on green energy and high-efficiency photovoltaic materials. They are known for their innovation in polysilicon and wafer technologies, with a focus on low-carbon solutions. GCL is committed to building a low-carbon PV value chain and advancing global clean energy transformation.

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...


## Catalog & Power


| Measure | GCL | JA Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 232 | 504 | +272 |
| Max Power | 740 W | 740 W |  |
| Avg Power | 558 W | 456 W | +102 W |


## Efficiency


| Measure | GCL | JA Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.50% | 24.80% | +0.30 pp |
| Avg Efficiency | 22.03% | 21.13% | +0.89 pp |


## Reliability & Warranty


| Measure | GCL | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.320%/°C | -0.322%/°C | +0.002 |
| Bifacial Share | 151 (65%) | 238 (47%) | +18 pp |
| Avg Warranty | 28.4 yrs | 27.9 yrs | +0.5 yr |


## Efficiency distribution

GCL skews to higher efficiency: 28% of lineup is 23%+


| Efficiency band | GCL | JA Solar |
| --- | --- | --- |
| \<20% | 2 (0.9%) | 112 (22.2%) |
| 20-21% | 43 (18.5%) | 99 (19.6%) |
| 21-22% | 73 (31.5%) | 112 (22.2%) |
| 22-23% | 48 (20.7%) | 107 (21.2%) |
| 23%+ | 66 (28.4%) | 74 (14.7%) |


## Power distribution

GCL offers more 600W+ panels (44% of lineup)


| Power band | GCL | JA Solar |
| --- | --- | --- |
| \<400W | 6 (2.6%) | 142 (28.2%) |
| 400-499W | 60 (25.9%) | 173 (34.3%) |
| 500-599W | 63 (27.2%) | 120 (23.8%) |
| 600-699W | 81 (34.9%) | 60 (11.9%) |
| 700W+ | 22 (9.5%) | 9 (1.8%) |


## Cell technology

Dominant cell tech: **TOPCon** (47%)

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


| Technology | GCL | JA Solar |
| --- | --- | --- |
| TOPCon | 108 (46.6%) | 146 (29.0%) |
| PERC | 102 (44.0%) | 247 (49.0%) |
| N-type | 10 (4.3%) | 90 (17.9%) |
| HJT | 7 (3.0%) | 5 (1.0%) |
| BIPV | 5 (2.2%) | 0 |
| Unknown | 0 | 16 (3.2%) |


## Top panels, GCL


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [GCL-NT12/66GDF-740](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-740) | 740 | 23.8 | -0.290 | Monocrystalline |
| 2 | [GCL-NT12/66GDF-735](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-735) | 735 | 23.7 | -0.290 | Monocrystalline |
| 3 | [GCL-NT12/66GDF-730](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-730) | 730 | 23.5 | -0.290 | Monocrystalline |
| 4 | [NT12/66GDF-730](https://comparepv.com/panel/gcl-nt12-66gdf-730) | 730 | 23.5 | -0.290 | Monocrystalline |
| 5 | [GCL-NT12/66GDF-725](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 6 | [NT12/66GDF-725](https://comparepv.com/panel/gcl-nt12-66gdf-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 7 | [GCL-NT12/66GDF 725](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-725-1) | 725 | 23.3 | -0.290 | Monocrystalline |
| 8 | [GCL-NH12/66GDF-720](https://comparepv.com/panel/gcl-gcl-nh12-66gdf-720) | 720 | 23.2 | -0.240 | Monocrystalline |
| 9 | [GCL-NT12/66GDF-720](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-720) | 720 | 23.2 | -0.290 | Monocrystalline |
| 10 | [NT12/66GDF-720](https://comparepv.com/panel/gcl-nt12-66gdf-720) | 720 | 23.2 | -0.290 | Monocrystalline |


## 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

GCL and JA Solar are both China-based, Tier 1 bankable solar panel manufacturers, but they differ considerably in scale, history, and market reach. GCL was founded in 1990 and has grown to a production capacity exceeding 30 GW with over 6,000 employees, trading on both the Hong Kong Stock Exchange and the Shenzhen Stock Exchange. JA Solar, founded in 2005, operates at a substantially larger scale with production capacity exceeding 100 GW and nearly 37,300 employees, placing it among the top five global PV module manufacturers with an estimated 11% share of global shipments - achieving roughly 77 GW in annual shipments alongside Trina Solar. GCL has been investing aggressively in next-generation technology, reporting a certified 29.51% efficiency for a perovskite-silicon tandem module in 2025, signaling its ambitions beyond conventional silicon. JA Solar, by contrast, has achieved Top Performer status in PVEL reliability testing ten consecutive times, reflecting a strong emphasis on bankable, proven product consistency.

In terms of portfolio and technology strengths, both manufacturers list PERC as their leading cell technology. GCL's catalog of 205 panels skews toward high-wattage, high-bifaciality products - average panel power of approximately 552 Wp and a bifacial share of around 60% - making it well suited to utility-scale ground-mount and large commercial C&I installations where area efficiency is critical. JA Solar offers a considerably broader portfolio of 524 models, with a maximum efficiency of 24.4%, maximum power of 740 Wp, and an average power of approximately 442 Wp, covering a wide range from residential rooftop installs to utility-scale projects. Its 44% bifacial share and diverse wattage range make it a versatile choice across project types and markets globally. Temperature coefficients are comparable between the two at roughly -0.324%/°C for GCL and -0.323%/°C for JA Solar, with both offering above-market average warranty periods exceeding 27.8 years.

For international buyers choosing between the two, JA Solar presents a lower-risk, high-flexibility option backed by strong global logistics, extensive third-party reliability validation, and a wide product range that accommodates both small residential and large-scale commercial procurement. GCL is a competitive alternative particularly for buyers prioritizing high average wattage per panel and bifacial density in larger projects, and its advanced R&D pipeline in perovskite technology may become a differentiator as next-generation modules mature. Both carry Tier 1 bankable status, which ensures project financing acceptance in most markets.

Written by claude-sonnet from the figures above.


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

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