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

# GL Solar vs JA Solar

JA Solar has the broader catalog (504 vs 13 models). JA Solar leads on peak efficiency at 24.80%. GL Solar leans bifacial (100% of lineup).


## The two companies


| Attribute | GL Solar | JA Solar |
| --- | --- | --- |
| Country | Italy | China |
| Headquarters | Marcianise | Beijing |
| Founded | 2000 | 2005 |
| Employees | 1-10 | 37,289 |
| Annual capacity |  | 100+ GW/year |
| Tier 1 |  | yes |
| Listed |  | SZSE: 002459 |
| Website | [https://www.glsolarenergy.it](https://www.glsolarenergy.it) | [https://www.jasolar.com](https://www.jasolar.com) |

GL Solar Energy s.r.l. is a small Italian company based in Marcianise (Caserta) specializing in the design, production, and installation of photovoltaic systems for residential and industrial applications. The company also distributes solar panels and related equipment, working with major international brands such as...

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 | GL Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 13 | 504 | +491 |
| Max Power | 640 W | 740 W | +100 W |
| Avg Power | 603 W | 456 W | +147 W |


## Efficiency


| Measure | GL Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 23.60% | 24.80% | +1.20 pp |
| Avg Efficiency | 22.61% | 21.13% | +1.47 pp |


## Reliability & Warranty


| Measure | GL Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.274%/°C | -0.322%/°C | +0.048 |
| Bifacial Share | 13 (100%) | 238 (47%) | +53 pp |
| Avg Warranty | 30.0 yrs | 27.9 yrs | +2.1 yr |


## Efficiency distribution

GL Solar skews to higher efficiency: 38% of lineup is 23%+


| Efficiency band | GL Solar | JA Solar |
| --- | --- | --- |
| 21-22% | 3 (23.1%) | 112 (22.2%) |
| 22-23% | 5 (38.5%) | 107 (21.2%) |
| 23%+ | 5 (38.5%) | 74 (14.7%) |
| \<20% | 0 | 112 (22.2%) |
| 20-21% | 0 | 99 (19.6%) |


## Power distribution

GL Solar offers more 600W+ panels (77% of lineup)


| Power band | GL Solar | JA Solar |
| --- | --- | --- |
| 400-499W | 1 (7.7%) | 173 (34.3%) |
| 500-599W | 2 (15.4%) | 120 (23.8%) |
| 600-699W | 10 (76.9%) | 60 (11.9%) |
| \<400W | 0 | 142 (28.2%) |
| 700W+ | 0 | 9 (1.8%) |


## Cell technology

Dominant cell tech: **HJT** (54%)

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


| Technology | GL Solar | JA Solar |
| --- | --- | --- |
| HJT | 7 (53.8%) | 5 (1.0%) |
| TOPCon | 6 (46.2%) | 146 (29.0%) |
| PERC | 0 | 247 (49.0%) |
| N-type | 0 | 90 (17.9%) |
| Unknown | 0 | 16 (3.2%) |


## Top panels, GL Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [3SHBGH-C#-640](https://comparepv.com/panel/gl-solar-3shbgh-c-640) | 640 | 22.6 | -0.260 | Monocrystalline |
| 2 | [3SHBGH-C#-635](https://comparepv.com/panel/gl-solar-3shbgh-c-635) | 635 | 22.4 | -0.260 | Monocrystalline |
| 3 | [3SHBGH-C#-630](https://comparepv.com/panel/gl-solar-3shbgh-c-630) | 630 | 22.3 | -0.260 | Monocrystalline |
| 4 | [3SHBGH-C#-625](https://comparepv.com/panel/gl-solar-3shbgh-c-625) | 625 | 22.1 | -0.260 | Monocrystalline |
| 5 | [3SHBGH-C#-620](https://comparepv.com/panel/gl-solar-3shbgh-c-620) | 620 | 21.9 | -0.260 | Monocrystalline |
| 6 | [3SHBGH-C#-615](https://comparepv.com/panel/gl-solar-3shbgh-c-615) | 615 | 21.7 | -0.260 | Monocrystalline |
| 7 | [3SHBGH-C#-610](https://comparepv.com/panel/gl-solar-3shbgh-c-610) | 610 | 21.6 | -0.260 | Monocrystalline |
| 8 | [HY-NT10/72GDF-610W](https://comparepv.com/panel/gl-solar-hy-nt10-72gdf-610w) | 610 | 23.6 | -0.290 | Monocrystalline |
| 9 | [HY-NT10/72GDF-605W](https://comparepv.com/panel/gl-solar-hy-nt10-72gdf-605w) | 605 | 23.4 | -0.290 | Monocrystalline |
| 10 | [HY-NT10/72GDF-600W](https://comparepv.com/panel/gl-solar-hy-nt10-72gdf-600w) | 600 | 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

GL Solar is a small Italy-based company founded in 2000, operating with fewer than ten employees. Rather than manufacturing its own solar panels, it functions purely as a distribution intermediary, reselling products from established manufacturers such as Trina Solar, Jinko Solar, Jolywood, AIKO, and Tongwei. GL Solar has no proprietary panel portfolio, no manufacturing capacity, and no Tier 1 standing of its own. JA Solar, by contrast, is one of the world's largest solar panel manufacturers, founded in China in 2005 and now employing over 37,000 people. With annual production capacity exceeding 100 GW, JA Solar holds Tier 1 bankable status according to S&P Global Commodity Insights, is publicly listed on the Shenzhen Stock Exchange, and ranks second globally in panel shipments - having achieved Top Performer recognition in PVEL reliability testing for the tenth consecutive time in 2025.

JA Solar's catalog spans 524 panel models, reaching a maximum output of 740 Wp, with an average power of approximately 441.7 Wp and average module efficiency of around 20.9%, peaking at 24.4%. PERC technology leads the lineup at over 52% of the portfolio, while TOPCon n-type cells represent a growing premium segment capable of mass-production cell efficiencies up to 27%. Roughly 44% of the portfolio consists of bifacial modules suited to utility-scale ground-mount and commercial C&I flat-roof installations. The average product warranty across the JA Solar portfolio reaches nearly 28 years, and the average temperature coefficient of Pmax sits at approximately -0.32%/°C - competitive within its peer group. GL Solar, as a pure distributor, cannot be evaluated on any of these technical dimensions under its own brand.

For international buyers directly comparing the two, JA Solar is the substantive manufacturing option - offering proprietary technology, verified production scale, Tier 1 bankability required for project finance, and long-term warranty commitments backed by the manufacturer itself. GL Solar occupies a different role as a local Italian distribution partner and should not be positioned as a competing panel manufacturer for residential rooftop, C&I, or utility-scale procurement decisions.

Written by claude-sonnet from the figures above.


## Other comparisons

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


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

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