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

# First Solar vs JA Solar

JA Solar has the broader catalog (504 vs 63 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | First Solar | JA Solar |
| --- | --- | --- |
| Country | USA | China |
| Headquarters | Tempe, AZ | Beijing |
| Founded | 1999 | 2005 |
| Employees | 5500-8100 | 37,289 |
| Annual capacity | 21+ GW/year | 100+ GW/year |
| Tier 1 | yes | yes |
| Listed | NASDAQ: FSLR | SZSE: 002459 |
| Website | [https://www.firstsolar.com](https://www.firstsolar.com) | [https://www.jasolar.com](https://www.jasolar.com) |

First Solar is a leading American solar technology company and global provider of responsibly produced eco-efficient solar modules, advancing the fight against climate change. The company manufactures thin-film photovoltaic (PV) modules using cadmium telluride (CdTe) semiconductor technology. First Solar is unique...

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 | First Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 63 | 504 | +441 |
| Max Power | 550 W | 740 W | +190 W |
| Avg Power | 481 W | 456 W | +25 W |


## Efficiency


| Measure | First Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 19.70% | 24.80% | +5.10 pp |
| Avg Efficiency | 18.56% | 21.13% | +2.58 pp |


## Reliability & Warranty


| Measure | First Solar | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.320%/°C | -0.322%/°C | +0.002 |
| Bifacial Share | 12 (19%) | 238 (47%) | +28 pp |
| Avg Warranty | 29.3 yrs | 27.9 yrs | +1.4 yr |


## Efficiency distribution

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


| Efficiency band | First Solar | JA Solar |
| --- | --- | --- |
| \<20% | 63 (100.0%) | 112 (22.2%) |
| 20-21% | 0 | 99 (19.6%) |
| 21-22% | 0 | 112 (22.2%) |
| 22-23% | 0 | 107 (21.2%) |
| 23%+ | 0 | 74 (14.7%) |


## Power distribution

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


| Power band | First Solar | JA Solar |
| --- | --- | --- |
| 400-499W | 44 (69.8%) | 173 (34.3%) |
| 500-599W | 19 (30.2%) | 120 (23.8%) |
| \<400W | 0 | 142 (28.2%) |
| 600-699W | 0 | 60 (11.9%) |
| 700W+ | 0 | 9 (1.8%) |


## Cell technology

Dominant cell tech: **CdTe** (81%)

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


| Technology | First Solar | JA Solar |
| --- | --- | --- |
| CdTe | 51 (81.0%) | 0 |
| Unknown | 12 (19.0%) | 16 (3.2%) |
| PERC | 0 | 247 (49.0%) |
| TOPCon | 0 | 146 (29.0%) |
| N-type | 0 | 90 (17.9%) |
| HJT | 0 | 5 (1.0%) |


## Top panels, First Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [FS-7550A-TR1](https://comparepv.com/panel/first-solar-fs-7550a-tr1) | 550 | 19.7 | -0.320 | Thin film |
| 2 | [FS-7550A-FT1](https://comparepv.com/panel/first-solar-fs-7550a-ft1) | 550 | 19.7 | -0.320 | Thin film |
| 3 | [FS-7545A-TR1](https://comparepv.com/panel/first-solar-fs-7545a-tr1) | 545 | 19.5 | -0.320 | Thin film |
| 4 | [FS-7545A-FT1](https://comparepv.com/panel/first-solar-fs-7545a-ft1) | 545 | 19.5 | -0.320 | Thin film |
| 5 | [FS-7540A-TR1](https://comparepv.com/panel/first-solar-fs-7540a-tr1) | 540 | 19.3 | -0.320 | Thin film |
| 6 | [FS-7540A-FT1](https://comparepv.com/panel/first-solar-fs-7540a-ft1) | 540 | 19.3 | -0.320 | Thin film |
| 7 | [FS-7535A-TR1](https://comparepv.com/panel/first-solar-fs-7535a-tr1) | 535 | 19.1 | -0.320 | Thin film |
| 8 | [FS-7535A-FT1](https://comparepv.com/panel/first-solar-fs-7535a-ft1) | 535 | 19.1 | -0.320 | Thin film |
| 9 | [FS-7532A-FT1](https://comparepv.com/panel/first-solar-fs-7532a-ft1) | 532 | 19.0 | -0.320 | Thin film |
| 10 | [FS-7530A-TR1](https://comparepv.com/panel/first-solar-fs-7530a-tr1) | 530 | 19.0 | -0.320 | Thin film |


## 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 |


## Summary

First Solar, founded in 1999 and headquartered in the United States, is the world's largest thin-film photovoltaic manufacturer and the only non-Chinese company consistently ranked among the global top-10 module suppliers. The company holds a production capacity exceeding 21 GW, employs between 5,500 and 8,100 people, and is listed on the NASDAQ. JA Solar, established in 2005 in China and listed on the Shenzhen Stock Exchange (SZSE), operates at a substantially larger industrial scale, with a production capacity exceeding 100 GW and a workforce of approximately 37,000 people. It offers a far broader catalog of 524 module models, compared to First Solar's focused portfolio of 63 models. Both manufacturers carry Tier 1 bankable status, qualifying them for project finance and institutional procurement. First Solar's manufacturing footprint spans the US, India, and Southeast Asia - supported by US Inflation Reduction Act incentives - while JA Solar's production is concentrated primarily in China.

The two companies diverge sharply in technology and portfolio design. First Solar's lineup is built almost entirely on cadmium telluride (CdTe) thin-film cells, which account for roughly 81% of its product range. CdTe modules deliver a maximum efficiency of 19.7% and an average portfolio efficiency of approximately 18.6%, but benefit from a warranted degradation rate of around 0.3% per year, immunity to LID and LeTID, and a temperature coefficient of -0.32%/°C - characteristics that translate to consistent long-term energy yield in utility-scale ground-mount projects. Average product warranty across the First Solar portfolio stands at approximately 29.3 years. JA Solar's catalog is primarily PERC-based (around 52% of models), with the company aggressively expanding into n-type TOPCon technology, for which it has claimed a certified cell efficiency of 26.07%. Peak module power reaches 740 Wp, maximum module efficiency hits 24.4%, and average portfolio efficiency stands at approximately 20.9%. Bifacial modules account for over 44% of JA Solar's catalog, and average product warranty is approximately 27.9 years. This combination of high wattage, broad bifacial offering, and wide model range makes JA Solar well suited to residential rooftop installs, commercial and industrial (C&I) projects, and large utility-scale deployments alike.

For international buyers choosing between the two, First Solar is the preferred option for large utility-scale ground-mount projects where low degradation guarantees, stable long-term performance, and Western supply-chain provenance carry a premium. JA Solar offers greater portfolio breadth and higher peak efficiency figures, making it the more flexible choice for developers and installers seeking high-wattage bifacial modules across a wide range of residential, commercial, and utility applications at competitive price points.

Written by claude-sonnet from the figures above.


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


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

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