--- title: "Bisol vs JA Solar - Brand Comparison | ComparePV" description: "Compare Bisol vs JA Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/bisol-vs-ja-solar" --- # Bisol vs JA Solar JA Solar has the broader catalog (504 vs 12 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | Bisol | JA Solar | | --- | --- | --- | | Country | Slovenia | China | | Headquarters | Prebold | Beijing | | Founded | 2004 | 2005 | | Employees | 200-500 | 37,289 | | Annual capacity | \<1 GW/year | 100+ GW/year | | Tier 1 | no | yes | | Listed | | SZSE: 002459 | | Website | [https://www.bisol.com](https://www.bisol.com) | [https://www.jasolar.com](https://www.jasolar.com) | BISOL Group is a European manufacturer of high-quality photovoltaic modules headquartered in Prebold, Slovenia. Founded in 2004, it is considered Europe's leading authentic solar module producer with a production capacity of 750 MW and products distributed in over 120 countries. The company operates debt-free and has... 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 | Bisol | JA Solar | Margin | | --- | --- | --- | --- | | Panel Models | 12 | 504 | +492 | | Max Power | 580 W | 740 W | +160 W | | Avg Power | 475 W | 456 W | +19 W | ## Efficiency | Measure | Bisol | JA Solar | Margin | | --- | --- | --- | --- | | Max Efficiency | 23.50% | 24.80% | +1.30 pp | | Avg Efficiency | 21.75% | 21.13% | +0.62 pp | ## Reliability & Warranty | Measure | Bisol | JA Solar | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.291%/°C | -0.322%/°C | +0.031 | | Bifacial Share | 1 (8%) | 238 (47%) | +39 pp | | Avg Warranty | 29.6 yrs | 27.9 yrs | +1.7 yr | ## Efficiency distribution Bisol skews to higher efficiency: 33% of lineup is 23%+ | Efficiency band | Bisol | JA Solar | | --- | --- | --- | | \<20% | 2 (16.7%) | 112 (22.2%) | | 20-21% | 1 (8.3%) | 99 (19.6%) | | 22-23% | 5 (41.7%) | 107 (21.2%) | | 23%+ | 4 (33.3%) | 74 (14.7%) | | 21-22% | 0 | 112 (22.2%) | ## Power distribution JA Solar offers more 600W+ panels (14% of lineup) | Power band | Bisol | JA Solar | | --- | --- | --- | | \<400W | 2 (16.7%) | 142 (28.2%) | | 400-499W | 4 (33.3%) | 173 (34.3%) | | 500-599W | 6 (50.0%) | 120 (23.8%) | | 600-699W | 0 | 60 (11.9%) | | 700W+ | 0 | 9 (1.8%) | ## Cell technology Dominant cell tech: **PERC** (58%) Dominant cell tech: **PERC** (49%) | Technology | Bisol | JA Solar | | --- | --- | --- | | PERC | 7 (58.3%) | 247 (49.0%) | | TOPCon | 5 (41.7%) | 146 (29.0%) | | N-type | 0 | 90 (17.9%) | | Unknown | 0 | 16 (3.2%) | | HJT | 0 | 5 (1.0%) | ## Top panels, Bisol | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 | 23.5 | -0.290 | Monocrystalline | | 2 | [BGO 570](https://comparepv.com/panel/bisol-bgo-570) | 570 | 23.1 | -0.290 | Monocrystalline | | 3 | [BGO 560](https://comparepv.com/panel/bisol-bgo-560) | 560 | 22.7 | -0.290 | Monocrystalline | | 4 | [BBO 520](https://comparepv.com/panel/bisol-bbo-520) | 520 | 23.2 | -0.290 | Monocrystalline | | 5 | [BBO 510](https://comparepv.com/panel/bisol-bbo-510) | 510 | 22.8 | -0.290 | Monocrystalline | | 6 | [BBO 500](https://comparepv.com/panel/bisol-bbo-500) | 500 | 22.3 | -0.290 | Monocrystalline | | 7 | [BDO 460](https://comparepv.com/panel/bisol-bdo-460) | 460 | 23.0 | -0.290 | Monocrystalline | | 8 | [BDO 450](https://comparepv.com/panel/bisol-bdo-450) | 450 | 22.5 | -0.290 | Monocrystalline | | 9 | [BDO 440](https://comparepv.com/panel/bisol-bdo-440) | 440 | 22.0 | -0.290 | Monocrystalline | | 10 | [BDO 410](https://comparepv.com/panel/bisol-bdo-410) | 410 | 20.5 | -0.290 | 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 Bisol and JA Solar represent fundamentally different tiers of the solar PV manufacturing industry. Bisol was founded in 2004 in Slovenia and operates as a niche European manufacturer with 200-500 employees and production capacity below 1 GW. Its panels carry certified European origin status, which has become an increasingly meaningful differentiator under evolving EU sourcing regulations and subsidy frameworks. JA Solar, founded in 2005 in China, is a global heavyweight with over 37,000 employees, production capacity exceeding 100 GW, and shipments of approximately 77 GW in 2024, placing it among the top two or three module suppliers worldwide. JA Solar holds Tier 1 bankable status and is publicly listed on the Shenzhen Stock Exchange, giving financiers and project developers the institutional confidence that Bisol, as a private mid-size manufacturer, cannot currently match. In terms of product portfolios, Bisol offers a focused lineup of 12 panel models with a maximum output of 580 Wp and a peak efficiency of 23.5%. Its average temperature coefficient of -0.291%/°C is notably better than JA Solar's -0.323%/°C, meaning Bisol modules lose less power under high ambient temperatures - a meaningful advantage for warm-climate installations. Bisol's average product warranty stands at approximately 29.6 years, exceeding JA Solar's average of roughly 27.9 years. The company is currently transitioning to G12R cell formats and expanding its manufacturing footprint with a new plant expected online in 2027. JA Solar's catalog spans 524 models, reaching up to 740 Wp and 24.4% peak efficiency. PERC technology still accounts for over 52% of its portfolio, but bifacial modules represent 44% of its lineup - compared to just 8% for Bisol - reflecting JA Solar's strong push into utility-scale and commercial bifacial applications. JA Solar has earned Top Performer recognition in PVEL reliability testing for the tenth consecutive time in 2025, underscoring its manufacturing consistency at scale. For international buyers, the choice hinges on project type and procurement context. Bisol is a credible option for residential rooftop installations and commercial projects in Europe where local origin, a premium temperature coefficient, and long warranty terms carry weight. JA Solar is the more practical choice for utility-scale ground-mount projects, large C&I deployments, and any project requiring bank financing or high-volume supply certainty. Its global supply chain, Tier 1 status, and broad product range give it a structural advantage for buyers operating at scale, while Bisol's European identity and focused quality positioning serve a distinct and defensible niche. Written by claude-sonnet from the figures above. ## Other comparisons - [Bisol vs A.B. Energy](https://comparepv.com/bisol-vs-a-b-energy) - [AE Solar vs JA Solar](https://comparepv.com/ae-solar-vs-ja-solar) - [Bisol vs AEET](https://comparepv.com/bisol-vs-aeet) - [AIKO vs JA Solar](https://comparepv.com/aiko-vs-ja-solar) - [Bisol vs AKCOME](https://comparepv.com/bisol-vs-akcome) - [ARTsolar vs JA Solar](https://comparepv.com/artsolar-vs-ja-solar) --- Source: https://comparepv.com/bisol-vs-ja-solar Not in this file, on the page: the distributions above drawn as charts.