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

# JA Solar vs Panasonic

JA Solar has the broader catalog (504 vs 25 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | Panasonic |
| --- | --- | --- |
| Country | China | Japan |
| Headquarters | Beijing | Kadoma, near Ōsaka |
| Founded | 2005 | 1918 |
| Employees | 37,289 | 9,500+ |
| Annual capacity | 100+ GW/year | 1+ GW/year |
| Tier 1 | yes |  |
| Listed | SZSE: 002459 | Tokyo Stock Exchange: 6752 |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.panasonic.com/global/energy/](https://www.panasonic.com/global/energy/) |

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...

Panasonic is a global leader in the development of innovative technologies and solutions for wide-ranging applications in the consumer electronics, housing, automotive, industry, communications, and energy sectors. The company was founded in 1918 by Konosuke Matsushita and has been committed to enhancing the quality...


## Catalog & Power


| Measure | JA Solar | Panasonic | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 25 | +479 |
| Max Power | 740 W | 430 W | +310 W |
| Avg Power | 456 W | 367 W | +89 W |


## Efficiency


| Measure | JA Solar | Panasonic | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 22.20% | +2.60 pp |
| Avg Efficiency | 21.13% | 20.68% | +0.45 pp |


## Reliability & Warranty


| Measure | JA Solar | Panasonic | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.267%/°C | +0.055 |
| Bifacial Share | 238 (47%) | 4 (16%) | +31 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 | Panasonic |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 6 (24.0%) |
| 20-21% | 99 (19.6%) | 8 (32.0%) |
| 21-22% | 112 (22.2%) | 8 (32.0%) |
| 22-23% | 107 (21.2%) | 3 (12.0%) |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

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


| Power band | JA Solar | Panasonic |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 19 (76.0%) |
| 400-499W | 173 (34.3%) | 6 (24.0%) |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **HJT** (88%)


| Technology | JA Solar | Panasonic |
| --- | --- | --- |
| PERC | 247 (49.0%) | 3 (12.0%) |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 0 |
| HJT | 5 (1.0%) | 22 (88.0%) |


## 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, Panasonic


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [EVPV430HK2](https://comparepv.com/panel/panasonic-evpv430hk2) | 430 | 22.2 | -0.240 | Monocrystalline |
| 2 | [EVPV420HK2](https://comparepv.com/panel/panasonic-evpv420hk2) | 420 | 21.7 | -0.240 | Monocrystalline |
| 3 | [EVPV410H](https://comparepv.com/panel/panasonic-evpv410h) | 410 | 22.2 | -0.260 | Monocrystalline |
| 4 | [EVPV410HK](https://comparepv.com/panel/panasonic-evpv410hk) | 410 | 22.2 | -0.260 | Monocrystalline |
| 5 | [EVPV400H](https://comparepv.com/panel/panasonic-evpv400h) | 400 | 21.6 | -0.260 | Monocrystalline |
| 6 | [EVPV400HK](https://comparepv.com/panel/panasonic-evpv400hk) | 400 | 21.6 | -0.260 | Monocrystalline |
| 7 | [EVPV390HK](https://comparepv.com/panel/panasonic-evpv390hk) | 390 | 21.1 | -0.260 | Monocrystalline |
| 8 | [EVPV390H](https://comparepv.com/panel/panasonic-evpv390h) | 390 | 21.1 | -0.260 | Monocrystalline |
| 9 | [EVPV380](https://comparepv.com/panel/panasonic-evpv380) | 380 | 21.7 | -0.260 | Monocrystalline |
| 10 | [EVPV370](https://comparepv.com/panel/panasonic-evpv370) | 370 | 21.2 | -0.260 | 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, it ranks among the largest solar panel producers globally and holds Tier 1 bankable status according to Bloomberg NEF - a mark of financial and operational credibility that matters to project financiers and developers. Its portfolio spans 524 panel models, covering every market segment from residential to large-scale utility projects across Europe, Asia, and beyond. Panasonic, by contrast, is a century-old Japanese electronics conglomerate founded in 1918 and listed on the Tokyo Stock Exchange. Its solar division is a focused, premium offering of just 25 panel models with a production capacity of just over 1 GW. In April 2025, Panasonic announced the discontinuation of its solar and battery storage business in North America, though it has committed to honoring warranty obligations for existing installations - a development that raises questions about the brand's long-term availability in certain markets.

JA Solar's portfolio is anchored in PERC cell technology (over 52% of models), with TOPCon gaining share in higher-end lines. A maximum panel output of 740 Wp and an average efficiency of around 20.9% reflect a lineup built for scale and versatility. The high proportion of bifacial panels (over 44%) makes JA Solar especially well-suited for ground-mount utility-scale projects and commercial C&I rooftops where bifacial energy gain improves returns. Its average warranty of nearly 28 years exceeds the industry standard. Panasonic's core strength is its HJT (heterojunction) technology, which accounts for 88% of its lineup. HJT cells deliver an average temperature coefficient of -0.267%/°C - meaningfully better than JA Solar's -0.323%/°C - meaning less output loss during hot weather. With a maximum efficiency of 22.2% and a portfolio peaking at 430 Wp, Panasonic panels are optimized for premium residential rooftop installs where roof space is constrained and long-term performance consistency is the primary concern.

For international buyers choosing between the two, the decision depends heavily on project type and risk profile. JA Solar is the practical choice for developers and installers working on projects of any scale - its Tier 1 bankability, 100+ GW manufacturing capacity, wide product range, and competitive pricing make it a low-risk, high-flexibility selection. Panasonic's HJT panels remain technically compelling for residential and boutique commercial applications where superior heat performance and a recognizable brand justify a premium per-watt cost, but the 2025 North American withdrawal introduces real uncertainty around supply continuity and after-sales support that buyers outside established channels should weigh carefully.

Written by claude-sonnet from the figures above.


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

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