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

# JA Solar vs Tongwei

JA Solar has the broader catalog (504 vs 122 models). JA Solar leads on peak efficiency at 24.80%. Tongwei leans bifacial (69% of lineup).


## The two companies


| Attribute | JA Solar | Tongwei |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Chengdu |
| Founded | 2005 | 2013 |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes | yes |
| Listed | SZSE: 002459 | SSE: 600438 |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://en.tongwei.com.cn](https://en.tongwei.com.cn) |

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 | Tongwei | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 122 | +382 |
| Max Power | 740 W | 750 W | +10 W |
| Avg Power | 456 W | 584 W | +128 W |


## Efficiency


| Measure | JA Solar | Tongwei | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 24.20% | +0.60 pp |
| Avg Efficiency | 21.13% | 22.59% | +1.45 pp |


## Reliability & Warranty


| Measure | JA Solar | Tongwei | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.284%/°C | +0.038 |
| Bifacial Share | 238 (47%) | 84 (69%) | +22 pp |
| Avg Warranty | 27.9 yrs | 29.5 yrs | +1.7 yr |


## Efficiency distribution

Tongwei skews to higher efficiency: 41% of lineup is 23%+


| Efficiency band | JA Solar | Tongwei |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 2 (1.6%) |
| 20-21% | 99 (19.6%) | 6 (4.9%) |
| 21-22% | 112 (22.2%) | 14 (11.5%) |
| 22-23% | 107 (21.2%) | 50 (41.0%) |
| 23%+ | 74 (14.7%) | 50 (41.0%) |


## Power distribution

Tongwei offers more 600W+ panels (53% of lineup)


| Power band | JA Solar | Tongwei |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 0 |
| 400-499W | 173 (34.3%) | 41 (33.6%) |
| 500-599W | 120 (23.8%) | 16 (13.1%) |
| 600-699W | 60 (11.9%) | 33 (27.0%) |
| 700W+ | 9 (1.8%) | 32 (26.2%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (47%)


| Technology | JA Solar | Tongwei |
| --- | --- | --- |
| PERC | 247 (49.0%) | 10 (8.2%) |
| TOPCon | 146 (29.0%) | 57 (46.7%) |
| N-type | 90 (17.9%) | 44 (36.1%) |
| Unknown | 16 (3.2%) | 6 (4.9%) |
| HJT | 5 (1.0%) | 5 (4.1%) |


## 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, Tongwei


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TWMNF-66HD750](https://comparepv.com/panel/tongwei-solar-twmnf-66hd750) | 750 | 24.1 | -0.280 | Monocrystalline |
| 2 | [TWMNF-66HD745](https://comparepv.com/panel/tongwei-solar-twmnf-66hd745) | 745 | 24.0 | -0.280 | Monocrystalline |
| 3 | [TWMNF-66HD740](https://comparepv.com/panel/tongwei-solar-twmnf-66hd740) | 740 | 23.8 | -0.280 | Monocrystalline |
| 4 | [TWMHF-66HD740X](https://comparepv.com/panel/tw-solar-twmhf-66hd740x) | 740 | 23.8 | -0.240 | Monocrystalline |
| 5 | [THC G12-66 Bifacial](https://comparepv.com/panel/tongwei-thc-g12-66-bifacial) | 740 | 23.8 | -0.280 | Monocrystalline |
| 6 | [TWMNF-66HD735](https://comparepv.com/panel/tongwei-solar-twmnf-66hd735) | 735 | 23.7 | -0.280 | Monocrystalline |
| 7 | [TWMHF-66HD735X](https://comparepv.com/panel/tw-solar-twmhf-66hd735x) | 735 | 23.7 | -0.240 | Monocrystalline |
| 8 | [TWMHF-66HD730X](https://comparepv.com/panel/tw-solar-twmhf-66hd730x) | 730 | 23.5 | -0.240 | Monocrystalline |
| 9 | [TWMNF-66HD730](https://comparepv.com/panel/tongwei-solar-twmnf-66hd730) | 730 | 23.5 | -0.280 | Monocrystalline |
| 10 | [TWMNF-66HD725](https://comparepv.com/panel/tongwei-solar-twmnf-66hd725) | 725 | 23.3 | -0.280 | Monocrystalline |


## Summary

JA Solar, founded in 2005 and headquartered in China, is one of the most established names in global solar PV manufacturing, with a production capacity exceeding 100 GW and a workforce of over 37,000 employees. Listed on the Shenzhen Stock Exchange and holding Tier 1 bankable status, the company offers one of the broadest module portfolios in the sector - 524 panel models covering a wide range of power classes and application types. Tongwei Solar entered the module manufacturing segment in 2013, but has grown at a remarkable pace, leveraging its position as a long-standing global leader in upstream solar cell production to rapidly become a top-tier module supplier. Also Tier 1 bankable and listed on the Shanghai Stock Exchange, Tongwei maintains a more focused portfolio of 122 models, concentrating on high-efficiency N-type products rather than broad market coverage. Both manufacturers are Chinese-headquartered and competing at the top end of the global market, but they represent distinct strategic postures: JA Solar prioritizes scale and portfolio breadth, while Tongwei prioritizes technology density and vertical integration.

JA Solar's product range is anchored in PERC cell technology, which accounts for over 52% of its lineup, yielding an average module efficiency of 20.87% and a peak efficiency of 24.4%. Maximum panel output reaches 740 Wp, and around 44.27% of the portfolio is bifacial, with an average product warranty of 27.85 years. This breadth makes JA Solar a natural fit for residential rooftop installs, diversified commercial C&I projects, and installers who need flexible procurement across multiple power classes. Tongwei's portfolio, by contrast, is led by N-type cell technology at 44.26% of its range, resulting in a notably higher average module efficiency of 22.57% and a much higher average panel output of 583.65 Wp - compared to JA Solar's 441.68 Wp average. Tongwei also holds an advantage in temperature performance, with an average temperature coefficient of -0.2842%/°C versus JA Solar's -0.3226%/°C, reducing power losses on hot days. A bifacial share of 68.85% and an average warranty of 29.55 years further strengthen Tongwei's case for utility-scale ground-mount and large commercial C&I applications where long-term energy yield is the deciding factor.

For international buyers selecting between the two, the choice hinges primarily on project type and procurement strategy. JA Solar's scale, two-decade track record, and extensive product catalog make it a low-risk, high-flexibility partner for installers and developers serving diverse markets. Tongwei is the stronger pick for projects demanding peak efficiency, superior bifacial performance, and modern N-type technology - particularly in space-constrained or high-irradiance environments where the efficiency and temperature coefficient advantages translate directly into measurable yield gains over the system lifetime.

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)
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- [AIKO vs Tongwei](https://comparepv.com/aiko-vs-tongwei)
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- [ARTsolar vs Tongwei](https://comparepv.com/artsolar-vs-tongwei)


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

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