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

# JA Solar vs VNS Bulgaria

JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | VNS Bulgaria |
| --- | --- | --- |
| Country | China | Bulgaria |
| Headquarters | Beijing | Kurdjali |
| Founded | 2005 | 2009 |
| Employees | 37,289 | null |
| Annual capacity | 100+ GW/year | null GW/year |
| Tier 1 | yes |  |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://solarstreetlighteu.com](https://solarstreetlighteu.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...

VNS Bulgaria Ltd. was established in 2009 and focuses on manufacturing and construction of solar street lighting, solar park lighting, LED street lamps, photovoltaic systems, and various other solar systems. The company utilizes innovative technologies in its designs and constructions and has completed over 1000...


## Catalog & Power


| Measure | JA Solar | VNS Bulgaria | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 0 | +504 |
| Max Power | 740 W | 0 W | +740 W |
| Avg Power | 456 W | 0 W | +456 W |


## Efficiency


| Measure | JA Solar | VNS Bulgaria | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | - |  |
| Avg Efficiency | 21.13% | - |  |


## Reliability & Warranty


| Measure | JA Solar | VNS Bulgaria | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | - |  |
| Bifacial Share | 238 (47%) | 0 (0%) | +47 pp |
| Avg Warranty | 27.9 yrs | - |  |


## Efficiency distribution

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


| Efficiency band | JA Solar | VNS Bulgaria |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 0 |
| 21-22% | 112 (22.2%) | 0 |
| 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 | VNS Bulgaria |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 0 |
| 400-499W | 173 (34.3%) | 0 |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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


| Technology | JA Solar | VNS Bulgaria |
| --- | --- | --- |
| PERC | 247 (49.0%) | 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 |


## Summary

JA Solar is one of the world's leading solar PV module manufacturers, founded in 2005 and headquartered in China. With a workforce of over 37,000 employees and an annual production capacity exceeding 100 GW, the company ranks among the very top tier of global module suppliers. It holds Tier 1 bankable status as recognized by both BloombergNEF and S&P Global Commodity Insights, and jointly topped Wood Mackenzie's Global Solar Module Manufacturer Ranking for the first half of 2025. Cumulative global shipments had reached nearly 300 GW by mid-2025. VNS Bulgaria, by contrast, is a Bulgarian company founded in 2009 that operates primarily as a distributor and reseller of panels from established brands - including LONGi, JA Solar, Jinko Solar, and Trina Solar - rather than as an original equipment manufacturer. The dataset contains zero proprietary panel models, zero rated power figures, and no production capacity data for VNS Bulgaria, and the company does not appear on any Tier 1 bankability list.

JA Solar's portfolio of 524 panel models covers a broad range of applications, with peak power reaching 740 Wp and maximum module efficiency of 24.4% (average across the portfolio approximately 20.9%). The dominant cell technology is PERC, accounting for over 52% of the lineup, while TOPCon-based modules in the Deep Blue 4.0 series - offering efficiencies above 22% - are increasingly prominent for space-constrained residential rooftop installs and high-yield commercial C&I projects. Approximately 44% of JA Solar's portfolio is bifacial, making the brand well suited for utility-scale ground-mount installations where albedo gain improves overall yield. The average warranty term across the portfolio approaches 28 years, and the company has earned PVEL Top Performer status ten times. VNS Bulgaria, lacking its own manufacturing infrastructure or independently rated products, is better positioned as a local procurement channel than as a technology contender for large-scale or performance-sensitive projects.

For international buyers evaluating the two companies side by side, JA Solar is the clear choice where bankability, technology depth, and long-term warranty support are priorities - whether for residential, commercial, or utility-scale deployments. VNS Bulgaria may serve a niche role as a regional distributor in the Balkan market, but it cannot be meaningfully compared as a module manufacturer against a vertically integrated, Tier 1-rated producer of JA Solar's scale.

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 VNS Bulgaria](https://comparepv.com/ae-solar-vs-vns-bulgaria)
- [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet)
- [AIKO vs VNS Bulgaria](https://comparepv.com/aiko-vs-vns-bulgaria)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs VNS Bulgaria](https://comparepv.com/artsolar-vs-vns-bulgaria)


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Source: https://comparepv.com/ja-solar-vs-vns-bulgaria

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