--- title: "JA Solar vs SolarWorld - Brand Comparison | ComparePV" description: "Compare JA Solar vs SolarWorld solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-solarworld" --- # JA Solar vs SolarWorld JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | JA Solar | SolarWorld | | --- | --- | --- | | Country | China | Germany | | Headquarters | Beijing | Bonn | | Founded | 2005 | 1998 | | Employees | 37,289 | 3000-5000 | | Annual capacity | 100+ GW/year | 1-2 GW/year | | Tier 1 | yes | | | 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... SolarWorld AG was a German photovoltaic manufacturer and one of the largest solar panel producers in the Western world, covering the full value chain from polysilicon feedstock to finished modules. The company operated major manufacturing plants in Freiberg, Germany and Hillsboro, Oregon, USA, and was once a leading... ## Catalog & Power | Measure | JA Solar | SolarWorld | 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 | SolarWorld | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | - | | | Avg Efficiency | 21.13% | - | | ## Reliability & Warranty | Measure | JA Solar | SolarWorld | 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 | SolarWorld | | --- | --- | --- | | \<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 | SolarWorld | | --- | --- | --- | | \<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 | SolarWorld | | --- | --- | --- | | 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, founded in China in 2005, has become one of the largest solar panel manufacturers in the world, employing over 37,000 people and operating production capacity exceeding 100 GW. The company holds confirmed Tier 1 bankable status, meaning it is fully accepted by project finance institutions globally, and is listed on the Shenzhen Stock Exchange (SZSE). Its active product portfolio spans 524 module models, with peak power reaching 740 Wp and maximum module efficiency of 24.4%. PERC technology accounts for over 52% of its lineup, while TOPCon and next-generation cell architectures are expanding the higher-efficiency end of the range. SolarWorld, founded in Germany in 1998, was historically regarded as a benchmark for European-quality solar manufacturing. However, the company filed for insolvency twice - first as SolarWorld AG in 2017, and again as SolarWorld Industries GmbH in 2018. With no current panel listings in active databases and a peak production capacity in the 1-2 GW range, SolarWorld is no longer an active supplier of new modules. JA Solar's portfolio serves a wide range of applications effectively. For residential rooftop installs, an average panel power of approximately 442 Wp and average efficiency above 20.8% deliver competitive output on constrained roof areas. Over 44% of JA Solar's portfolio consists of bifacial modules, making the brand particularly well positioned for utility-scale ground-mount projects and large commercial C&I installations where rear-side irradiance from ground reflection adds meaningful yield. An average product warranty of nearly 28 years and a temperature coefficient of Pmax of around -0.32%/°C reflect solid long-term reliability. JA Solar has earned Top Performer recognition in PVEL independent testing on multiple occasions, reinforcing confidence for bankable large-scale projects. SolarWorld's legacy modules were valued for build quality and compliance with European certification standards, but with no confirmed active production or current distribution network, the brand cannot be recommended for new procurement in any segment. For international buyers choosing between the two, JA Solar is the only viable active option - it offers a full current product lineup, Tier 1 bankability, competitive pricing, and global distribution reach including Europe. SolarWorld is relevant today only for the servicing and maintenance of systems already installed, not for new residential, commercial, or utility-scale projects. 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 SolarWorld](https://comparepv.com/ae-solar-vs-solarworld) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs SolarWorld](https://comparepv.com/aiko-vs-solarworld) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs SolarWorld](https://comparepv.com/artsolar-vs-solarworld) --- Source: https://comparepv.com/ja-solar-vs-solarworld Not in this file, on the page: the distributions above drawn as charts.