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

# DualSun vs JA Solar

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 | DualSun | JA Solar |
| --- | --- | --- |
| Country | France | China |
| Headquarters | Marseille | Beijing |
| Founded | 2010 | 2005 |
| Employees | 50-100 | 37,289 |
| Annual capacity |  | 100+ GW/year |
| Tier 1 |  | yes |
| Listed |  | SZSE: 002459 |
| Website | [https://dualsun.com](https://dualsun.com) | [https://www.jasolar.com](https://www.jasolar.com) |

DualSun is a French manufacturer specializing in hybrid solar panels that simultaneously generate electricity (photovoltaic) and hot water (thermal), marketed as PVT panels. The company produces both its flagship SPRING hybrid panel and the FLASH high-performance PV panel, with R&D based in Marseille and module...

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 | DualSun | JA Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 6 | 504 | +498 |
| Max Power | 500 W | 740 W | +240 W |
| Avg Power | 442 W | 456 W | +14 W |


## Efficiency


| Measure | DualSun | JA Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 22.00% | 24.80% | +2.80 pp |
| Avg Efficiency | 21.67% | 21.13% | +0.53 pp |


## Reliability & Warranty


| Measure | DualSun | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.313%/°C | -0.322%/°C | +0.009 |
| Bifacial Share | 2 (33%) | 238 (47%) | +14 pp |
| Avg Warranty | 30.0 yrs | 27.9 yrs | +2.1 yr |


## Efficiency distribution

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


| Efficiency band | DualSun | JA Solar |
| --- | --- | --- |
| 20-21% | 1 (16.7%) | 99 (19.6%) |
| 21-22% | 4 (66.7%) | 112 (22.2%) |
| 22-23% | 1 (16.7%) | 107 (21.2%) |
| \<20% | 0 | 112 (22.2%) |
| 23%+ | 0 | 74 (14.7%) |


## Power distribution

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


| Power band | DualSun | JA Solar |
| --- | --- | --- |
| 400-499W | 5 (83.3%) | 173 (34.3%) |
| 500-599W | 1 (16.7%) | 120 (23.8%) |
| \<400W | 0 | 142 (28.2%) |
| 600-699W | 0 | 60 (11.9%) |
| 700W+ | 0 | 9 (1.8%) |


## Cell technology

Dominant cell tech: **TOPCon** (83%)

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


| Technology | DualSun | JA Solar |
| --- | --- | --- |
| TOPCon | 5 (83.3%) | 146 (29.0%) |
| PERC | 1 (16.7%) | 247 (49.0%) |
| N-type | 0 | 90 (17.9%) |
| Unknown | 0 | 16 (3.2%) |
| HJT | 0 | 5 (1.0%) |


## Top panels, DualSun


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [DS500-132M10B-01](https://comparepv.com/panel/dualsun-ds500-132m10b-01) | 500 | 20.8 | -0.360 | Monocrystalline |
| 2 | [DS450-108M10TB-03](https://comparepv.com/panel/huasun-ds450-108m10tb-03) | 450 | 22.0 | -0.280 | Monocrystalline |
| 3 | [DS425-108M10TB-03](https://comparepv.com/panel/huasun-ds425-108m10tb-03) | 425 | 21.8 | -0.310 | Monocrystalline |
| 4 | [SPRING4 425 TOPCon NI](https://comparepv.com/panel/huasun-spring4-425-topcon-ni) | 425 | 21.8 | -0.310 | Monocrystalline |
| 5 | [SPRING4 425 TOPCon F](https://comparepv.com/panel/huasun-spring4-425-topcon-f) | 425 | 21.8 | -0.310 | Monocrystalline |
| 6 | [SPRING4 425 TOPCon I](https://comparepv.com/panel/dualsun-spring4-425-topcon-i) | 425 | 21.8 | -0.310 | 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

DualSun is a French solar manufacturer founded in 2010 and headquartered in Marseille, employing between 50 and 100 people. The company built its identity around hybrid photovoltaic-thermal (PV-T) panels that simultaneously generate electricity and usable heat, and has since expanded this concept into a focused lineup of premium standard PV modules. Its catalog covers 6 models with a maximum output of 500 Wp, 83% of which use TOPCon cell technology, achieving a peak module efficiency of 22% and carrying a 30-year power warranty - among the longest guarantees available in the industry. DualSun is not a Tier 1 bankable manufacturer in the traditional institutional sense, but it occupies a recognized niche in European prosumer and green-building markets. JA Solar, founded in 2005 in China, occupies an entirely different tier of the industry: over 37,000 employees, a production capacity exceeding 100 GW, Tier 1 bankable status, and a public listing on the Shenzhen Stock Exchange. Its portfolio of 524 panel models spans a maximum output of 740 Wp and a peak efficiency of 24.4% in its most advanced TOPCon modules, while PERC technology still accounts for roughly 52% of the catalog.

DualSun's most distinctive asset is its hybrid SPRING module, which delivers meaningful thermal output for domestic hot water or heat pump integration alongside standard electrical generation - the company claims a carbon footprint two to three times lower than the industry average, a credential that carries weight in green-building certifications and EU-aligned procurement. Its standard PV lineup with a 30-year warranty and strong temperature coefficient of -0.313%/°C makes it a compelling choice for residential rooftop installs in temperate European climates where thermal integration adds real energy value. JA Solar's strength lies in breadth and scale: 44% of its models are bifacial, maximum panel power reaches 740 Wp, and the Deep Blue 5.0 series has pushed TOPCon module efficiency past 24%, making the brand well suited for utility-scale ground-mount projects, large commercial C&I installations, and any application where supply security, financing bankability, and cost-per-watt optimization drive the decision.

For international buyers choosing between these two manufacturers, the decision maps cleanly onto project type. DualSun is the stronger pick for European residential or small commercial projects where PV-T hybrid functionality, a European manufacturing footprint, or environmental certification adds measurable value. JA Solar is the practical default for volume installers and project developers who need Tier 1 bankability, a wide product range, and reliable large-scale supply - from residential rooftops to multi-megawatt ground-mount farms. Its average warranty of approximately 28 years and strong real-world performance track record make it a low-risk choice across virtually all market segments.

Written by claude-sonnet from the figures above.


## Other comparisons

- [DualSun vs A.B. Energy](https://comparepv.com/dualsun-vs-a-b-energy)
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- [AIKO vs JA Solar](https://comparepv.com/aiko-vs-ja-solar)
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- [ARTsolar vs JA Solar](https://comparepv.com/artsolar-vs-ja-solar)


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

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