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

# JA Solar vs SOMI

JA Solar has the broader catalog (504 vs 6 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | SOMI |
| --- | --- | --- |
| 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 | SOMI | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 6 | +498 |
| Max Power | 740 W | 550 W | +190 W |
| Avg Power | 456 W | 538 W | +81 W |


## Efficiency


| Measure | JA Solar | SOMI | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 21.30% | +3.50 pp |
| Avg Efficiency | 21.13% | 20.80% | +0.33 pp |


## Reliability & Warranty


| Measure | JA Solar | SOMI | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.350%/°C | +0.028 |
| Bifacial Share | 238 (47%) | 0 (0%) | +47 pp |
| Avg Warranty | 27.9 yrs | 30.0 yrs | +2.1 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | SOMI |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 4 (66.7%) |
| 21-22% | 112 (22.2%) | 2 (33.3%) |
| 22-23% | 107 (21.2%) | 0 |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

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


| Power band | JA Solar | SOMI |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 0 |
| 400-499W | 173 (34.3%) | 0 |
| 500-599W | 120 (23.8%) | 6 (100.0%) |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

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


| Technology | JA Solar | SOMI |
| --- | --- | --- |
| PERC | 247 (49.0%) | 6 (100.0%) |
| TOPCon | 146 (29.0%) | 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, SOMI


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [SP550M-72HB](https://comparepv.com/panel/somi-sp550m-72hb) | 550 | 21.3 | -0.350 | Monocrystalline |
| 2 | [SP545M-72HB](https://comparepv.com/panel/somi-sp545m-72hb) | 545 | 21.1 | -0.350 | Monocrystalline |
| 3 | [SP540M-72HB](https://comparepv.com/panel/somi-sp540m-72hb) | 540 | 20.9 | -0.350 | Monocrystalline |
| 4 | [SP535M-72HB](https://comparepv.com/panel/somi-sp535m-72hb) | 535 | 20.7 | -0.350 | Monocrystalline |
| 5 | [SP530M-72HB](https://comparepv.com/panel/somi-sp530m-72hb) | 530 | 20.5 | -0.350 | Monocrystalline |
| 6 | [SP525M-72HB](https://comparepv.com/panel/somi-sp525m-72hb) | 525 | 20.3 | -0.350 | Monocrystalline |


## Summary

JA Solar is one of the world's largest solar module manufacturers, founded in 2005 in Hebei Province, China, and now headquartered in Beijing. The company listed on NASDAQ in 2007 and has grown into a global industry leader, with annual module shipments exceeding 79 GW in 2024 and cumulative global shipments reaching nearly 300 GW by mid-2025. JA Solar holds Tier 1 status with both S&P Global Commodity Insights and BloombergNEF, and was ranked first worldwide in Wood Mackenzie's global module manufacturer ranking for the first half of 2025. SOMI Applications and Services s.r.o. is a Czech Republic-based company that installs photovoltaic systems with autonomous, AI-assisted energy management, operating primarily as a system integrator and panel distributor serving the Czech domestic market. In terms of institutional recognition, confirmed bankability ratings, and production scale, JA Solar holds a substantially stronger global standing.

JA Solar's flagship lines for the European market are the DeepBlue 4.0 Pro and DeepBlue 5.0 series, both built on n-type TOPCon cell technology and available in bifacial and monofacial double-glass configurations. Modules targeting residential rooftop installations fall in the mid-400 W output range, while variants suited to commercial and industrial or utility-scale ground-mount projects reach outputs of up to 670 W. JA Solar backs its products with a 25-year linear power output warranty and a 15-year product warranty. SOMI offers monocrystalline panels in PERC and bifacial technologies across a 425-550 Wp power range, alongside inverters and battery storage systems, addressing households, multi-family buildings, and small-to-medium commercial customers primarily in the Czech Republic. SOMI panels carry a stated 30-year linear power warranty and a 12-year materials and workmanship warranty.

For international buyers - particularly those sourcing for projects that require tier-rated bankability, large-volume supply chain reliability, or broad European service coverage - JA Solar is the clear and well-documented choice. SOMI operates at a regional level in Central Europe, and independent performance reviews, international certifications, and supply chain depth are not publicly documented to a comparable degree. The two brands are not interchangeable for buyers with institutional procurement requirements, and SOMI should be evaluated primarily in the context of small-to-medium Czech or Central European projects where its local integrator model and service offer are the primary value proposition.

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 SOMI](https://comparepv.com/aiko-vs-somi)
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- [ARTsolar vs SOMI](https://comparepv.com/artsolar-vs-somi)


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

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