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

# Epax Solar vs JA Solar

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


## The two companies


| Attribute | Epax Solar | JA Solar |
| --- | --- | --- |
| Country | Germany | China |
| Headquarters | Deggendorf | Beijing |
| Founded | 2019 | 2005 |
| Employees | 1-10 | 37,289 |
| Annual capacity |  | 100+ GW/year |
| Tier 1 |  | yes |
| Listed |  | SZSE: 002459 |
| Website | [https://www.epax-solar.de](https://www.epax-solar.de) | [https://www.jasolar.com](https://www.jasolar.com) |

Epax Solar is an owner-managed wholesaler for photovoltaic components. They reliably supply solar installers across Germany and Europe with a wide product portfolio, thanks to direct manufacturer partnerships and efficient logistics. Epax Solar is committed to clean energy generation and sustainability.

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


## Efficiency


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


## Reliability & Warranty


| Measure | Epax Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | - | -0.322%/°C |  |
| Bifacial Share | 0 (0%) | 238 (47%) | +47 pp |
| Avg Warranty | - | 27.9 yrs |  |


## Efficiency distribution

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


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


## Power distribution

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


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


## Cell technology

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


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


## 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

Epax Solar GmbH is a small, owner-managed photovoltaic distribution company headquartered in Deggendorf, Germany, founded in 2019 with a team of fewer than 10 employees. Rather than manufacturing solar panels, Epax Solar operates as a wholesale supplier of PV components - including modules, inverters, energy storage systems, and mounting structures - serving installers across Germany and broader Europe. JA Solar, by contrast, is one of the world's largest solar manufacturers, established in China in 2005 and employing over 37,000 people. With a production capacity exceeding 100 GW and a listing on the Shenzhen Stock Exchange (SZSE), JA Solar holds Tier 1 bankable status, a designation recognized by leading project finance institutions worldwide. Its product catalog spans 524 panel models, with a maximum rated output of 740 Wp, an average module efficiency of approximately 20.9%, and top-line models reaching up to 24.4% efficiency.

In terms of technology and application fit, Epax Solar's value proposition lies in distribution flexibility rather than proprietary panel technology. It does not maintain an independent product line backed by manufacturer warranties or third-party laboratory certifications for own-brand panels, which limits its role to that of a regional supply channel. JA Solar, by contrast, fields a broad technology portfolio anchored primarily in PERC cells - representing roughly 52% of its catalog - alongside an expanding range of TOPCon modules that push efficiency higher. Approximately 44% of JA Solar's models are bifacial, making them well suited to utility-scale ground-mount and commercial C&I projects where rear-side energy gain adds meaningful yield. With an average product warranty of nearly 28 years and consistent top-performer rankings in independent reliability testing, JA Solar panels are a strong fit for residential rooftop installations, large commercial systems, and grid-scale solar farms alike.

For international buyers comparing the two, the distinction is clear: Epax Solar is a regional distributor, not a panel manufacturer, and the two companies occupy entirely different roles in the PV supply chain. Buyers seeking a vertically integrated, bankable manufacturer with a global track record and a wide selection of high-efficiency panels will find JA Solar the more appropriate choice. Epax Solar may serve as a useful procurement partner for installers operating in Germany or central Europe, but it does not offer the manufacturing scale, independent certification depth, or financial backing associated with a Tier 1 producer.

Written by claude-sonnet from the figures above.


## Other comparisons

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


---

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