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

# JA Solar vs VSUN

JA Solar has the broader catalog (504 vs 111 models). JA Solar leads on peak efficiency at 24.80%. VSUN leans bifacial (75% of lineup).


## The two companies


| Attribute | JA Solar | VSUN |
| --- | --- | --- |
| Country | China | Germany |
| Headquarters | Beijing | Frankfurt am Main |
| Founded | 2005 | 2012 |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes | no |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.vsun-solar.com](https://www.vsun-solar.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 | VSUN | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 111 | +393 |
| Max Power | 740 W | 715 W | +25 W |
| Avg Power | 456 W | 524 W | +68 W |


## Efficiency


| Measure | JA Solar | VSUN | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.14% | +1.66 pp |
| Avg Efficiency | 21.13% | 21.71% | +0.58 pp |


## Reliability & Warranty


| Measure | JA Solar | VSUN | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.308%/°C | +0.014 |
| Bifacial Share | 238 (47%) | 83 (75%) | +28 pp |
| Avg Warranty | 27.9 yrs | 29.7 yrs | +1.8 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | VSUN |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 1 (0.9%) |
| 20-21% | 99 (19.6%) | 13 (11.7%) |
| 21-22% | 112 (22.2%) | 55 (49.5%) |
| 22-23% | 107 (21.2%) | 39 (35.1%) |
| 23%+ | 74 (14.7%) | 3 (2.7%) |


## Power distribution

VSUN offers more 600W+ panels (29% of lineup)


| Power band | JA Solar | VSUN |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 3 (2.7%) |
| 400-499W | 173 (34.3%) | 48 (43.2%) |
| 500-599W | 120 (23.8%) | 28 (25.2%) |
| 600-699W | 60 (11.9%) | 27 (24.3%) |
| 700W+ | 9 (1.8%) | 5 (4.5%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (72%)


| Technology | JA Solar | VSUN |
| --- | --- | --- |
| PERC | 247 (49.0%) | 28 (25.2%) |
| TOPCon | 146 (29.0%) | 80 (72.1%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 3 (2.7%) |
| 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, VSUN


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [VSUN715N-132BMHT-DG](https://comparepv.com/panel/vsun-vsun715n-132bmht-dg) | 715 | 23.0 | -0.300 | Monocrystalline |
| 2 | [VSUN710N-132BMHT-DG](https://comparepv.com/panel/vsun-vsun710n-132bmht-dg) | 710 | 22.9 | -0.300 | Monocrystalline |
| 3 | [VSUN705N-132BMHT-DG](https://comparepv.com/panel/vsun-vsun705n-132bmht-dg) | 705 | 22.7 | -0.300 | Monocrystalline |
| 4 | [VSUN700N-132BMH-DG](https://comparepv.com/panel/vsun-vsun700n-132bmh-dg) | 700 | 22.5 | -0.300 | Monocrystalline |
| 5 | [VSUN700N-132BMHT-DG](https://comparepv.com/panel/vsun-vsun700n-132bmht-dg) | 700 | 22.5 | -0.300 | Monocrystalline |
| 6 | [VSUN695N-132BMH-DG](https://comparepv.com/panel/vsun-vsun695n-132bmh-dg) | 695 | 22.4 | -0.300 | Monocrystalline |
| 7 | [VSUN695N-132BMHT-DG](https://comparepv.com/panel/vsun-vsun695n-132bmht-dg) | 695 | 22.4 | -0.300 | Monocrystalline |
| 8 | [VSUN690N-132BMHT-DG](https://comparepv.com/panel/vsun-vsun690n-132bmht-dg) | 690 | 22.2 | -0.300 | Monocrystalline |
| 9 | [VSUN690N-132BMH-DG](https://comparepv.com/panel/vsun-vsun690n-132bmh-dg) | 690 | 22.2 | -0.300 | Monocrystalline |
| 10 | [VSUN685N-132BMH-DG](https://comparepv.com/panel/vsun-vsun685n-132bmh-dg) | 685 | 22.1 | -0.300 | Monocrystalline |


## Summary

JA Solar, founded in 2005 in China and listed on the Shenzhen Stock Exchange (SZSE), is one of the world's largest solar panel manufacturers, with a workforce exceeding 37,000 employees and an annual production capacity of over 100 GW. Its Tier 1 bankable status makes it a standard reference for project finance-backed installations worldwide. VSUN, founded in 2012 and headquartered in Germany, operates at a markedly smaller scale with a focused portfolio of 111 modules and no Tier 1 classification - a distinction that carries weight for institutional lenders and large-scale project developers. JA Solar's production scale and global supply chain give it a competitive pricing advantage and procurement reliability that VSUN cannot yet match.

JA Solar's 524-module lineup is anchored by PERC technology (52.1% of the portfolio), reaching a maximum output of 740 Wp and a peak efficiency of 24.4%, making it well-suited for residential rooftop installs, utility-scale ground-mount projects, and commercial C&I applications alike. VSUN takes a technology-forward position, with TOPCon cells representing 72.1% of its range. Its average module efficiency of 21.71% outpaces JA Solar's 20.87%, and its temperature coefficient of -0.308%/°C compares favorably to JA Solar's -0.323%/°C, translating to lower thermal power losses in warm climates. VSUN's bifacial share of 74.77% - nearly double JA Solar's 44.27% - combined with an average warranty of approximately 29.7 years (versus 27.9 years for JA Solar) makes it an appealing candidate for bifacial ground-mount projects and buyers who prioritize long-term performance guarantees.

For buyers who require a proven, bankable supplier across diverse project types and geographies, JA Solar is the lower-risk, higher-availability choice with the institutional backing to support large-scale procurement. VSUN is better suited for technically sophisticated buyers who specifically seek N-type TOPCon performance, higher bifacial yield, and extended warranty terms, and who are prepared to conduct thorough supplier due diligence in the absence of a Tier 1 rating.

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)
- [AE Solar vs VSUN](https://comparepv.com/ae-solar-vs-vsun)
- [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet)
- [AIKO vs VSUN](https://comparepv.com/aiko-vs-vsun)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs VSUN](https://comparepv.com/artsolar-vs-vsun)


---

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

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