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

# Exiom vs JA Solar

JA Solar has the broader catalog (504 vs 39 models). JA Solar leads on peak efficiency at 24.80%. Exiom leans bifacial (59% of lineup).


## The two companies


| Attribute | Exiom | JA Solar |
| --- | --- | --- |
| Country | Spain | China |
| Headquarters | Barcelona | Beijing |
| Founded | 2019 | 2005 |
| Employees | 100 | 37,289 |
| Annual capacity | 0.5 GW/year | 100+ GW/year |
| Tier 1 | no | yes |
| Listed |  | SZSE: 002459 |
| Website | [https://www.exiomsolution.com](https://www.exiomsolution.com) | [https://www.jasolar.com](https://www.jasolar.com) |

Exiom is a European solar module manufacturer with production facilities in Spain. The company focuses on producing high-quality photovoltaic modules for the European market, emphasizing local manufacturing and short supply chains.

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 | Exiom | JA Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 39 | 504 | +465 |
| Max Power | 605 W | 740 W | +135 W |
| Avg Power | 461 W | 456 W | +5 W |


## Efficiency


| Measure | Exiom | JA Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 23.40% | 24.80% | +1.40 pp |
| Avg Efficiency | 20.12% | 21.13% | +1.01 pp |


## Reliability & Warranty


| Measure | Exiom | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.338%/°C | -0.322%/°C | +0.016 |
| Bifacial Share | 23 (59%) | 238 (47%) | +12 pp |
| Avg Warranty | 29.4 yrs | 27.9 yrs | +1.5 yr |


## Efficiency distribution

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


| Efficiency band | Exiom | JA Solar |
| --- | --- | --- |
| \<20% | 9 (23.1%) | 112 (22.2%) |
| 20-21% | 12 (30.8%) | 99 (19.6%) |
| 21-22% | 7 (17.9%) | 112 (22.2%) |
| 22-23% | 6 (15.4%) | 107 (21.2%) |
| 23%+ | 5 (12.8%) | 74 (14.7%) |


## Power distribution

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


| Power band | Exiom | JA Solar |
| --- | --- | --- |
| \<400W | 9 (23.1%) | 142 (28.2%) |
| 400-499W | 15 (38.5%) | 173 (34.3%) |
| 500-599W | 13 (33.3%) | 120 (23.8%) |
| 600-699W | 2 (5.1%) | 60 (11.9%) |
| 700W+ | 0 | 9 (1.8%) |


## Cell technology

Dominant cell tech: **PERC** (69%)

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


| Technology | Exiom | JA Solar |
| --- | --- | --- |
| PERC | 27 (69.2%) | 247 (49.0%) |
| TOPCon | 12 (30.8%) | 146 (29.0%) |
| N-type | 0 | 90 (17.9%) |
| Unknown | 0 | 16 (3.2%) |
| HJT | 0 | 5 (1.0%) |


## Top panels, Exiom


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [EX605TC-144HC182BF](https://comparepv.com/panel/exiom-ex605tc-144hc182bf) | 605 | 23.4 | -0.280 | Monocrystalline |
| 2 | [EX600TC-144HC182BF](https://comparepv.com/panel/exiom-ex600tc-144hc182bf) | 600 | 23.2 | -0.280 | Monocrystalline |
| 3 | [EX595TC-144HC182BF](https://comparepv.com/panel/exiom-ex595tc-144hc182bf) | 595 | 23.0 | -0.280 | Monocrystalline |
| 4 | [EX590TC-144HC182BF](https://comparepv.com/panel/exiom-ex590tc-144hc182bf) | 590 | 22.8 | -0.280 | Monocrystalline |
| 5 | [EX585TC-144HC182BF](https://comparepv.com/panel/exiom-ex585tc-144hc182bf) | 585 | 22.6 | -0.280 | Monocrystalline |
| 6 | [EX560MB(144)182](https://comparepv.com/panel/exiom-ex560mb-144-182) | 560 | 21.7 | -0.350 | Monocrystalline |
| 7 | [EX555MB(144)182](https://comparepv.com/panel/exiom-ex555mb-144-182) | 555 | 21.5 | -0.350 | Monocrystalline |
| 8 | [EX550MB-144BF](https://comparepv.com/panel/exiom-ex550mb-144bf) | 550 | 21.3 | -0.350 | Monocrystalline |
| 9 | [EX550MB(144)182](https://comparepv.com/panel/exiom-ex550mb-144-182) | 550 | 21.3 | -0.350 | Monocrystalline |
| 10 | [EX545MB-144BF](https://comparepv.com/panel/exiom-ex545mb-144bf) | 545 | 21.1 | -0.350 | Monocrystalline |


## 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

Exiom is a young Spanish manufacturer founded in 2019 and headquartered in Asturias, with approximately 100 employees and a production capacity of 0.5 GW - anchored by a recently opened factory in Langreo built in strategic partnership with Iberdrola, one of Europe's largest utilities. JA Solar, founded in 2005 and listed on the Shenzhen Stock Exchange, is one of China's largest solar panel producers, with over 37,000 employees and production capacity exceeding 100 GW. A defining distinction between the two is bankability: JA Solar holds confirmed Tier 1 status - most recently reaffirmed by S&P Global Commodity Insights - while Exiom has not yet achieved this designation. This gap in scale and financial standing has direct implications for project financing, insurance underwriting, and long-term supply security assessments.

On the technology side, JA Solar's portfolio of 524 models spans a power range up to 740 Wp, with an average module efficiency of 20.87% and an average temperature coefficient of -0.323%/°C, making it well-suited to utility-scale ground-mount projects and large commercial C&I installations where consistent performance across temperature swings is critical. Exiom's more focused 32-model lineup reaches up to 605 Wp, with an average efficiency of 19.59% and a notably high share of bifacial panels at 71.9% versus 44.3% for JA Solar - positioning Exiom well for European ground-mount and flat-roof commercial projects where bifacial energy gains are achievable. Exiom's average warranty term of 29.2 years also modestly exceeds JA Solar's 27.9 years. Both manufacturers currently rely on PERC cell technology as the dominant foundation of their respective portfolios.

For international buyers, JA Solar is the lower-risk choice for large-scale or bank-financed projects, given its Tier 1 certification, extensive global track record, and broad product range covering virtually every market segment. Exiom represents a credible European alternative - particularly attractive in EU markets where local manufacturing origin supports public subsidy eligibility, avoids import tariffs, and aligns with growing "Made in Europe" procurement preferences. For residential rooftop and smaller commercial projects across Europe, Exiom's bifacial-heavy portfolio, longer warranty terms, and European provenance make it a competitive option, provided buyers are comfortable with the limited scale and the absence of Tier 1 bankability for financed projects.

Written by claude-sonnet from the figures above.


## Other comparisons

- [Exiom vs A.B. Energy](https://comparepv.com/exiom-vs-a-b-energy)
- [AE Solar vs JA Solar](https://comparepv.com/ae-solar-vs-ja-solar)
- [Exiom vs AEET](https://comparepv.com/exiom-vs-aeet)
- [AIKO vs JA Solar](https://comparepv.com/aiko-vs-ja-solar)
- [Exiom vs AKCOME](https://comparepv.com/exiom-vs-akcome)
- [ARTsolar vs JA Solar](https://comparepv.com/artsolar-vs-ja-solar)


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

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