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

# JA Solar vs TommaTech

JA Solar has the broader catalog (504 vs 7 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | TommaTech |
| --- | --- | --- |
| Country | China | Turkey |
| Headquarters | Beijing | Istanbul |
| 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 | TommaTech | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 7 | +497 |
| Max Power | 740 W | 600 W | +140 W |
| Avg Power | 456 W | 585 W | +129 W |


## Efficiency


| Measure | JA Solar | TommaTech | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.23% | +1.57 pp |
| Avg Efficiency | 21.13% | 22.65% | +1.51 pp |


## Reliability & Warranty


| Measure | JA Solar | TommaTech | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.300%/°C | +0.022 |
| Bifacial Share | 238 (47%) | 0 (0%) | +47 pp |
| Avg Warranty | 27.9 yrs | 30.0 yrs | +2.1 yr |


## Efficiency distribution

TommaTech skews to higher efficiency: 29% of lineup is 23%+


| Efficiency band | JA Solar | TommaTech |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 0 |
| 21-22% | 112 (22.2%) | 0 |
| 22-23% | 107 (21.2%) | 5 (71.4%) |
| 23%+ | 74 (14.7%) | 2 (28.6%) |


## Power distribution

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


| Power band | JA Solar | TommaTech |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 0 |
| 400-499W | 173 (34.3%) | 0 |
| 500-599W | 120 (23.8%) | 6 (85.7%) |
| 600-699W | 60 (11.9%) | 1 (14.3%) |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **TOPCon** (100%)


| Technology | JA Solar | TommaTech |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 7 (100.0%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 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, TommaTech


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TT600-144TN10](https://comparepv.com/panel/tommatech-tt600-144tn10) | 600 | 23.2 | -0.300 | Monocrystalline |
| 2 | [TT595-144TN10](https://comparepv.com/panel/tommatech-tt595-144tn10) | 595 | 23.0 | -0.300 | Monocrystalline |
| 3 | [TT590-144TN10](https://comparepv.com/panel/tommatech-tt590-144tn10) | 590 | 22.8 | -0.300 | Monocrystalline |
| 4 | [TT585-144TN10](https://comparepv.com/panel/tommatech-tt585-144tn10) | 585 | 22.6 | -0.300 | Monocrystalline |
| 5 | [TT580-144TN10](https://comparepv.com/panel/tommatech-tt580-144tn10) | 580 | 22.4 | -0.300 | Monocrystalline |
| 6 | [TT575-144TN10](https://comparepv.com/panel/tommatech-tt575-144tn10) | 575 | 22.3 | -0.300 | Monocrystalline |
| 7 | [TT570-144TN10](https://comparepv.com/panel/tommatech-tt570-144tn10) | 570 | 22.1 | -0.300 | Monocrystalline |


## Summary

JA Solar, founded in China in 2005, is one of the world's largest solar PV manufacturers, with a production capacity exceeding 100 GW and a workforce of over 37,000 employees. The company holds Tier 1 bankable status - a widely recognized indicator of financial stability and manufacturing quality used by project financiers - and is listed on the Shenzhen Stock Exchange, with products distributed across more than 100 countries. TommaTech is a Turkish solar panel manufacturer that has established a presence in the European market through its subsidiary TommaTech GmbH. The company does not currently hold Tier 1 bankable status, which is a relevant consideration for large financed solar projects, but it has positioned itself as a high-efficiency specialist focused exclusively on TOPCon N-type technology.

JA Solar's extensive portfolio of 524 modules spans multiple cell technologies - with PERC representing 52% of models and TOPCon gaining increasing share - and includes bifacial panels (44.27% of the lineup) with power outputs reaching up to 740 Wp. Average module efficiency across the portfolio stands at 20.87%, with top models reaching 24.4%, an average temperature coefficient for Pmax of -0.3226%/°C, and an average warranty of 27.85 years. This breadth makes JA Solar a versatile choice for residential rooftop installs, utility-scale ground-mount projects, and commercial C&I applications alike. TommaTech, by contrast, offers a tightly focused lineup of 7 TOPCon N-type monofacial modules with power outputs up to 600 Wp. Average module efficiency is 22.65%, with a maximum of 23.23%, a temperature coefficient of -0.30%/°C, and an average warranty of 30 years. The absence of bifacial options limits suitability for large ground-mounted projects, but the high efficiency and modern N-type cell technology make TommaTech a strong candidate for space-constrained residential and small commercial rooftop installations.

For international buyers requiring bankable, widely certified panels for financed utility-scale or commercial projects, JA Solar is the clear choice given its scale, multi-decade track record, and global supply chain reach. TommaTech offers a compelling alternative for buyers in Turkey or nearby European markets who prioritize high-efficiency TOPCon technology in smaller residential or C&I deployments, provided the absence of Tier 1 bankable status is acceptable within the project's financing and insurance framework.

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


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

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