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

# JA Solar vs MWG

JA Solar has the broader catalog (504 vs 2 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | MWG |
| --- | --- | --- |
| Country | China | Poland |
| Headquarters | Beijing | Zabrze |
| Founded | 2005 | 2005 |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes | no |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://mwpower.pl](https://mwpower.pl) |

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...

MW Power is a Polish brand operating under MPL Group, offering a range of technology products including photovoltaic panels sold under the MW Green Power (MWG) brand. Their solar modules are small-wattage units (10W–100W) made from monocrystalline silicon, primarily intended for autonomous and off-grid energy systems...


## Catalog & Power


| Measure | JA Solar | MWG | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 2 | +502 |
| Max Power | 740 W | 400 W | +340 W |
| Avg Power | 456 W | 370 W | +86 W |


## Efficiency


| Measure | JA Solar | MWG | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 20.12% | +4.68 pp |
| Avg Efficiency | 21.13% | 19.72% | +1.41 pp |


## Reliability & Warranty


| Measure | JA Solar | MWG | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.390%/°C | +0.068 |
| Bifacial Share | 238 (47%) | 0 (0%) | +47 pp |
| Avg Warranty | 27.9 yrs | 25.0 yrs | +2.9 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | MWG |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 1 (50.0%) |
| 20-21% | 99 (19.6%) | 1 (50.0%) |
| 21-22% | 112 (22.2%) | 0 |
| 22-23% | 107 (21.2%) | 0 |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

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


| Power band | JA Solar | MWG |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 1 (50.0%) |
| 400-499W | 173 (34.3%) | 1 (50.0%) |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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


| Technology | JA Solar | MWG |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 2 (100.0%) |
| 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, MWG


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [MWG-400M](https://comparepv.com/panel/mwg-mwg-400m) | 400 | 19.3 | -0.390 | Monocrystalline |
| 2 | [MWG-340M](https://comparepv.com/panel/mwg-mwg-340m) | 340 | 20.1 | -0.390 | Monocrystalline |


## Summary

JA Solar was founded in 2005 in China and is listed on the Shenzhen Stock Exchange (SZSE). With over 37,000 employees and a manufacturing capacity exceeding 100 GW per year, the company ranks among the top global solar module producers by volume. It holds confirmed Tier 1 bankable status from S&P Global Commodity Insights, making its modules eligible for project finance from major banks and investment funds worldwide. Its active product catalog covers 524 panel models, with maximum power output reaching 740 Wp and peak module efficiency up to 24.4%. The dominant cell technology across the portfolio is PERC, accounting for over 52% of models, with TOPCon-based modules featured in newer lines such as the DeepBlue 4.0 Pro series. MWG is a Polish company also established in 2005, but it does not hold Tier 1 bankable status. Available industry data shows no identifiable panel models in standard databases, and the brand does not appear in major international or Polish sector rankings, making any direct technical comparison between the two manufacturers difficult.

JA Solar's strengths lie in portfolio depth, consistent field performance, and global supply reliability. Its modules are well suited for residential rooftop installations where high efficiency and compact form factors are priorities, as well as for utility-scale ground-mount projects and commercial C&I installations where volume availability, certified quality documentation, and long-term warranties are essential. Bifacial modules account for approximately 44% of the JA Solar lineup, offering added energy yield in ground-mounted systems that benefit from albedo reflection. The average linear power warranty across its portfolio runs close to 28 years, and the company recorded 33.79 GW in shipments in H1 2025 alone - underscoring supply chain depth and production reliability for large European orders. MWG, as a locally based Polish entity, could in principle offer shorter supply chains and more direct after-sales support for the domestic market, but the absence of verifiable product data prevents any meaningful assessment of its technical capabilities or long-term reliability.

For international buyers or Polish project developers choosing between these two manufacturers, JA Solar is the clear choice wherever bankability, documented panel performance, and enforceable long-term warranties are required. MWG's lack of a traceable product catalog and absence from Tier 1 rankings make it unsuitable for financed projects or large-scale deployments until verifiable technical and commercial data becomes available.

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


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

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