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

# JA Solar vs MY Solar

JA Solar has the broader catalog (504 vs 140 models). JA Solar leads on peak efficiency at 24.80%.


## The two companies


| Attribute | JA Solar | MY Solar |
| --- | --- | --- |
| Country | China |  |
| Headquarters | Beijing |  |
| Founded | 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) |  |

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 | JA Solar | MY Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 140 | +364 |
| Max Power | 740 W | 740 W |  |
| Avg Power | 456 W | 418 W | +38 W |


## Efficiency


| Measure | JA Solar | MY Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.82% | +0.98 pp |
| Avg Efficiency | 21.13% | 19.87% | +1.26 pp |


## Reliability & Warranty


| Measure | JA Solar | MY Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.333%/°C | +0.011 |
| Bifacial Share | 238 (47%) | 54 (39%) | +9 pp |
| Avg Warranty | 27.9 yrs | 27.1 yrs | +0.8 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | MY Solar |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 75 (53.6%) |
| 20-21% | 99 (19.6%) | 10 (7.1%) |
| 21-22% | 112 (22.2%) | 19 (13.6%) |
| 22-23% | 107 (21.2%) | 30 (21.4%) |
| 23%+ | 74 (14.7%) | 6 (4.3%) |


## Power distribution

MY Solar offers more 600W+ panels (21% of lineup)


| Power band | JA Solar | MY Solar |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 66 (47.1%) |
| 400-499W | 173 (34.3%) | 35 (25.0%) |
| 500-599W | 120 (23.8%) | 10 (7.1%) |
| 600-699W | 60 (11.9%) | 18 (12.9%) |
| 700W+ | 9 (1.8%) | 11 (7.9%) |


## Cell technology

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

Dominant cell tech: **PERC** (58%)


| Technology | JA Solar | MY Solar |
| --- | --- | --- |
| PERC | 247 (49.0%) | 81 (57.9%) |
| TOPCon | 146 (29.0%) | 25 (17.9%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 5 (3.6%) |
| HJT | 5 (1.0%) | 29 (20.7%) |


## 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, MY Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [MS740N-HJTGB](https://comparepv.com/panel/my-solar-ms740n-hjtgb) | 740 | 23.8 | -0.240 | Monocrystalline |
| 2 | [MS735N-HJTGB](https://comparepv.com/panel/my-solar-ms735n-hjtgb) | 735 | 23.7 | -0.240 | Monocrystalline |
| 3 | [MS730N-HJTGB](https://comparepv.com/panel/my-solar-ms730n-hjtgb) | 730 | 23.5 | -0.240 | Monocrystalline |
| 4 | [MS725N-HJTGB](https://comparepv.com/panel/my-solar-ms725n-hjtgb) | 725 | 23.3 | -0.240 | Monocrystalline |
| 5 | [MS720N-HJTGB](https://comparepv.com/panel/my-solar-ms720n-hjtgb) | 720 | 23.2 | -0.260 | Monocrystalline |
| 6 | [MS715N-HJTGB](https://comparepv.com/panel/my-solar-ms715n-hjtgb) | 715 | 23.0 | -0.260 | Monocrystalline |
| 7 | [MS710N-HJTGB](https://comparepv.com/panel/my-solar-ms710n-hjtgb) | 710 | 22.9 | -0.260 | Monocrystalline |
| 8 | [MS705N-HJTGB](https://comparepv.com/panel/my-solar-ms705n-hjtgb) | 705 | 22.7 | -0.260 | Monocrystalline |
| 9 | [MY-M12/144-700](https://comparepv.com/panel/my-solar-my-m12-144-700) | 700 | 22.3 | -0.350 | Monocrystalline |
| 10 | [MS700N-DHBG](https://comparepv.com/panel/my-solar-ms700n-dhbg) | 700 | 22.5 | -0.300 | Monocrystalline |


## Summary

JA Solar was founded in 2005 in China and has grown into one of the world's largest photovoltaic module manufacturers, with a workforce of over 37,000 employees and a stated production capacity exceeding 100 GW. Listed on the Shenzhen Stock Exchange, the company holds Tier 1 bankable status as confirmed by both BloombergNEF and S&P Global Commodity Insights, placing it consistently alongside Jinko Solar, LONGi, and Trina Solar at the top of global module supply rankings. MY Solar is a considerably smaller Chinese manufacturer that does not carry Tier 1 designation and has minimal coverage in major independent industry publications such as PV Tech or PV Magazine, suggesting a more limited international market footprint. Its catalog spans 140 panel models compared to JA Solar's 524, and no public data on founding year, production capacity, or financial standing is readily available.

Both manufacturers anchor their portfolios in PERC cell technology - JA Solar at 52.1% of its lineup and MY Solar at 57.9% - but JA Solar demonstrates a measurable performance advantage across key metrics. Maximum panel efficiency reaches 24.4% for JA Solar versus 23.82% for MY Solar, while average portfolio efficiency stands at 20.87% versus 19.87%. Average panel output also favors JA Solar at 441.68 Wp compared to 417.68 Wp. JA Solar's temperature coefficient of -0.3226%/°C is slightly better than MY Solar's -0.3325%/°C, meaning marginally lower power losses during hot weather. JA Solar's bifacial share of 44.3% makes it well suited to utility-scale ground-mount projects and larger commercial C&I installations where bifacial gain adds measurable yield. MY Solar's smaller and less differentiated portfolio positions it primarily for cost-driven residential rooftop installs where project finance requirements do not apply. Both manufacturers offer comparable average warranty terms of approximately 27 years.

For international buyers - including procurement teams active in European and Polish markets - JA Solar is the lower-risk selection across virtually all project types, given its verified Tier 1 bankability, global manufacturing scale, and broad technology portfolio that covers both standard residential and high-power commercial applications. MY Solar may appeal to cost-sensitive installers targeting straightforward residential deployments, but the absence of Tier 1 status and limited third-party validation warrant thorough due diligence before committing to significant volumes, particularly where long-term module availability and warranty enforcement are material considerations.

Written by claude-sonnet from the figures above.


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- [AIKO vs MY Solar](https://comparepv.com/aiko-vs-my-solar)
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- [ARTsolar vs MY Solar](https://comparepv.com/artsolar-vs-my-solar)


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

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