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

# JA Solar vs Techwise Solar

JA Solar has the broader catalog (504 vs 164 models). JA Solar leads on peak efficiency at 24.80%.


## The two companies


| Attribute | JA Solar | Techwise 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 | Techwise Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 164 | +340 |
| Max Power | 740 W | 720 W | +20 W |
| Avg Power | 456 W | 530 W | +74 W |


## Efficiency


| Measure | JA Solar | Techwise Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.80% | +1.00 pp |
| Avg Efficiency | 21.13% | 21.88% | +0.75 pp |


## Reliability & Warranty


| Measure | JA Solar | Techwise Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.317%/°C | +0.005 |
| Bifacial Share | 238 (47%) | 81 (49%) | +2 pp |
| Avg Warranty | 27.9 yrs | 27.3 yrs | +0.5 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | Techwise Solar |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 2 (1.2%) |
| 20-21% | 99 (19.6%) | 25 (15.2%) |
| 21-22% | 112 (22.2%) | 47 (28.7%) |
| 22-23% | 107 (21.2%) | 74 (45.1%) |
| 23%+ | 74 (14.7%) | 15 (9.1%) |
| Unknown | 0 | 1 (0.6%) |


## Power distribution

Techwise Solar offers more 600W+ panels (27% of lineup)


| Power band | JA Solar | Techwise Solar |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 4 (2.4%) |
| 400-499W | 173 (34.3%) | 60 (36.6%) |
| 500-599W | 120 (23.8%) | 55 (33.5%) |
| 600-699W | 60 (11.9%) | 40 (24.4%) |
| 700W+ | 9 (1.8%) | 5 (3.0%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (70%)


| Technology | JA Solar | Techwise Solar |
| --- | --- | --- |
| PERC | 247 (49.0%) | 46 (28.0%) |
| TOPCon | 146 (29.0%) | 114 (69.5%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 4 (2.4%) |
| 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, Techwise Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TW-720HT-01-720W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-720w) | 720 | 22.5 | -0.300 | Monocrystalline |
| 2 | [TW-720HT-01-715W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-715w) | 715 | 22.4 | -0.300 | Monocrystalline |
| 3 | [TW-720HT-01-710W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-710w) | 710 | 22.2 | -0.300 | Monocrystalline |
| 4 | [TW-720HT-01-705W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-705w) | 705 | 22.1 | -0.300 | Monocrystalline |
| 5 | [TW-720HT-01-700W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-700w) | 700 | 21.9 | -0.300 | Monocrystalline |
| 6 | [TW-670HT](https://comparepv.com/panel/techwise-solar-tw-670ht) | 670 | 21.6 | -0.340 | Monocrystalline |
| 7 | [TW-665HT](https://comparepv.com/panel/techwise-solar-tw-665ht) | 665 | 21.4 | -0.340 | Monocrystalline |
| 8 | [TW-660HT](https://comparepv.com/panel/techwise-solar-tw-660ht) | 660 | 21.2 | -0.340 | Monocrystalline |
| 9 | [TW-655HT](https://comparepv.com/panel/techwise-solar-tw-655ht) | 655 | 21.1 | -0.340 | Monocrystalline |
| 10 | [TW-650HT](https://comparepv.com/panel/techwise-solar-tw-650ht) | 650 | 20.9 | -0.340 | Monocrystalline |


## Summary

JA Solar and Techwise Solar represent very different tiers of the global solar manufacturing landscape. Founded in 2005 and headquartered in China, JA Solar has grown into one of the world's leading PV module manufacturers, with a workforce exceeding 37,000 employees, a production capacity of over 100 GW, and a confirmed Tier 1 - bankable status that facilitates project financing worldwide. The company is listed on the Shenzhen Stock Exchange and has built a portfolio of 524 panel models spanning multiple technology generations. It achieved the PVEL Top Performer designation for the tenth consecutive time in 2025, underscoring its long-term reliability record. Techwise Solar is a smaller Chinese manufacturer with an annual production capacity of approximately 1 GW and no Tier 1 classification. Its catalog of 164 models is considerably narrower, but it holds standard industry certifications including TUV, CE, ISO, and CGC.

In terms of technology, JA Solar's portfolio is currently led by PERC cells (52.1% of models), with TOPCon gaining ground through its DeepBlue 4.0 Pro and newly unveiled DeepBlue 5.0 lines. Its maximum rated output reaches 740 Wp, though the average across its full catalog sits at 442 Wp with an average efficiency of 20.87%. Bifacial models account for 44.3% of its range, making it well-suited for both residential rooftop installs and large utility-scale ground-mount projects where tracker compatibility and broad availability matter. Techwise Solar, by contrast, has already shifted heavily toward TOPCon (69.5% of its catalog) and achieves a noticeably higher average panel power of 530 Wp and average efficiency of 21.87%. Its temperature coefficient of -0.3168%/°C is marginally better than JA Solar's -0.3226%/°C, offering a slight edge in warm-climate performance. These characteristics make it a potential fit for commercial C&I projects where power density on limited roof space is a priority.

For international buyers, JA Solar is the lower-risk choice for large-scale and bankable projects - its Tier 1 status, global supply chain, independently verified reliability, and established European distribution make due diligence straightforward. Techwise Solar may appeal to buyers seeking newer TOPCon-heavy portfolios with higher average efficiencies, potentially at lower cost, but the absence of Tier 1 status and limited third-party review data mean buyers should conduct thorough warranty and after-sales service verification before committing to volume orders.

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 Techwise Solar](https://comparepv.com/aiko-vs-techwise-solar)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs Techwise Solar](https://comparepv.com/artsolar-vs-techwise-solar)


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

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