--- title: "JA Solar vs SEG Solar - Brand Comparison | ComparePV" description: "Compare JA Solar vs SEG Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-seg-solar" --- # JA Solar vs SEG Solar JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | JA Solar | SEG Solar | | --- | --- | --- | | Country | China | United States | | Headquarters | Beijing | Houston | | Founded | 2005 | 2016 | | Employees | 37,289 | | | Annual capacity | 100+ GW/year | 6+ GW/year | | Tier 1 | yes | yes | | Listed | SZSE: 002459 | | | Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.segsolar.com](https://www.segsolar.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... SEG Solar is a vertically integrated solar photovoltaic module manufacturer headquartered in Houston, Texas, with manufacturing operations in the USA and Indonesia. The company serves utility, commercial, and residential markets, and by end of 2024 had shipped over 6 GW of modules globally. SEG Solar is one of the few... ## Catalog & Power | Measure | JA Solar | SEG Solar | 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 | SEG Solar | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | - | | | Avg Efficiency | 21.13% | - | | ## Reliability & Warranty | Measure | JA Solar | SEG Solar | 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 | SEG Solar | | --- | --- | --- | | \<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 | SEG Solar | | --- | --- | --- | | \<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 | SEG Solar | | --- | --- | --- | | 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 and SEG Solar are both Tier 1 bankable solar module manufacturers, but they differ substantially in scale, heritage, and market positioning. JA Solar was founded in 2005 in China, employs over 37,000 people, and operates with a production capacity exceeding 100 GW per year, making it one of the largest solar manufacturers globally and a constituent of the Shenzhen Stock Exchange. Its portfolio spans 524 panel models with a maximum output of 740 Wp and peak efficiency of 24.4%, with PERC technology accounting for over 52% of its lineup alongside a growing TOPCon offering under the Deep Blue 4.0 series. SEG Solar, by contrast, was founded in 2016 and is headquartered in Houston, Texas, operating as a 100% U.S.-owned manufacturer with a current production capacity of 6+ GW - anchored by a 2 GW factory already operational in Texas and a planned expansion to bring total domestic capacity to approximately 6 GW. SEG's panels range in efficiency from 21.48% to 23.14%, with outputs reaching up to 700 Wp. JA Solar's strengths lie in its massive scale, broad product range, and long track record - qualities that make it well suited to residential rooftop installs, commercial C&I projects, and large utility-scale ground-mount deployments across Europe and beyond. The company has earned PVEL Top Performer recognition ten times, including in 2025, signaling consistent module reliability. SEG Solar's key differentiator is its U.S.-based manufacturing, which allows qualifying installations to access the 10% domestic content Investment Tax Credit (ITC) adder - a compelling advantage for U.S. commercial and utility buyers. SEG has also demonstrated reliability credentials with four consecutive years of Kiwa PVEL Top Performer status through 2025. The company has established a presence in Europe, with over 2 GW of cumulative installations across the U.S. and European markets reported by end of 2022. For international buyers outside the United States, JA Solar offers unmatched product breadth, supply chain depth, and proven global distribution - making it the lower-risk choice for most project types. SEG Solar is the stronger option for U.S.-based projects where domestic content compliance and ITC optimization are priorities, or for buyers seeking a non-Chinese supply chain alternative backed by American manufacturing credentials. 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 SEG Solar](https://comparepv.com/ae-solar-vs-seg-solar) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs SEG Solar](https://comparepv.com/aiko-vs-seg-solar) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs SEG Solar](https://comparepv.com/artsolar-vs-seg-solar) --- Source: https://comparepv.com/ja-solar-vs-seg-solar Not in this file, on the page: the distributions above drawn as charts.