--- title: "JA Solar vs Solarspace - Brand Comparison | ComparePV" description: "Compare JA Solar vs Solarspace solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-solarspace" --- # JA Solar vs Solarspace JA Solar has the broader catalog (504 vs 82 models). JA Solar leads on peak efficiency at 24.80%. Solarspace leans bifacial (93% of lineup). ## The two companies | Attribute | JA Solar | Solarspace | | --- | --- | --- | | Country | China | China | | Headquarters | Beijing | Xuzhou | | Founded | 2005 | 2011 | | Employees | 37,289 | 6000+ | | Annual capacity | 100+ GW/year | 60+ GW/year | | Tier 1 | yes | yes | | Listed | SZSE: 002459 | | | Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://solarspace.com](https://solarspace.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... SolarSpace is a world-leading solar cell and module manufacturer, focusing on high-efficiency solar technology production both in China and overseas. They are among the top solar cell manufacturers, providing high-quality solar modules with core cell technology worldwide. SolarSpace is dedicated to empowering solar... ## Catalog & Power | Measure | JA Solar | Solarspace | Margin | | --- | --- | --- | --- | | Panel Models | 504 | 82 | +422 | | Max Power | 740 W | 710 W | +30 W | | Avg Power | 456 W | 539 W | +83 W | ## Efficiency | Measure | JA Solar | Solarspace | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | 23.16% | +1.64 pp | | Avg Efficiency | 21.13% | 22.04% | +0.90 pp | ## Reliability & Warranty | Measure | JA Solar | Solarspace | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.322%/°C | -0.299%/°C | +0.022 | | Bifacial Share | 238 (47%) | 76 (93%) | +45 pp | | Avg Warranty | 27.9 yrs | 29.6 yrs | +1.8 yr | ## Efficiency distribution JA Solar skews to higher efficiency: 15% of lineup is 23%+ | Efficiency band | JA Solar | Solarspace | | --- | --- | --- | | \<20% | 112 (22.2%) | 0 | | 20-21% | 99 (19.6%) | 7 (8.5%) | | 21-22% | 112 (22.2%) | 26 (31.7%) | | 22-23% | 107 (21.2%) | 46 (56.1%) | | 23%+ | 74 (14.7%) | 3 (3.7%) | ## Power distribution Solarspace offers more 600W+ panels (33% of lineup) | Power band | JA Solar | Solarspace | | --- | --- | --- | | \<400W | 142 (28.2%) | 1 (1.2%) | | 400-499W | 173 (34.3%) | 35 (42.7%) | | 500-599W | 120 (23.8%) | 19 (23.2%) | | 600-699W | 60 (11.9%) | 24 (29.3%) | | 700W+ | 9 (1.8%) | 3 (3.7%) | ## Cell technology Dominant cell tech: **PERC** (49%) Dominant cell tech: **N-type** (70%) | Technology | JA Solar | Solarspace | | --- | --- | --- | | PERC | 247 (49.0%) | 18 (22.0%) | | TOPCon | 146 (29.0%) | 7 (8.5%) | | N-type | 90 (17.9%) | 57 (69.5%) | | 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 | ## Top panels, Solarspace | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [SS9-66HD-710N](https://comparepv.com/panel/solarspace-ss9-66hd-710n) | 710 | 22.9 | -0.290 | Monocrystalline | | 2 | [SS9-66HD-705N](https://comparepv.com/panel/solarspace-ss9-66hd-705n) | 705 | 22.7 | -0.290 | Monocrystalline | | 3 | [SS9-66HD-700N](https://comparepv.com/panel/solarspace-ss9-66hd-700n) | 700 | 22.5 | -0.290 | Monocrystalline | | 4 | [SS9-66HD-695N](https://comparepv.com/panel/solarspace-ss9-66hd-695n) | 695 | 22.4 | -0.290 | Monocrystalline | | 5 | [SS9-66HD-690N](https://comparepv.com/panel/solarspace-ss9-66hd-690n) | 690 | 22.2 | -0.290 | Monocrystalline | | 6 | [SS9-66HD-685N](https://comparepv.com/panel/solarspace-ss9-66hd-685n) | 685 | 22.1 | -0.290 | Monocrystalline | | 7 | [SS9-66HD-680N](https://comparepv.com/panel/solarspace-ss9-66hd-680n) | 680 | 21.9 | -0.290 | Monocrystalline | | 8 | [SS9-66HD-675N](https://comparepv.com/panel/solarspace-ss9-66hd-675n) | 675 | 21.7 | -0.290 | Monocrystalline | | 9 | [SS9-66HD-670M](https://comparepv.com/panel/solarspace-ss9-66hd-670m) | 670 | 21.6 | -0.330 | Monocrystalline | | 10 | [SS9-66HD-670N](https://comparepv.com/panel/solarspace-ss9-66hd-670n) | 670 | 21.6 | -0.290 | Monocrystalline | ## Summary JA Solar, founded in 2005 and headquartered in China, is one of the world's largest solar module manufacturers, with a production capacity exceeding 100 GW and a workforce of over 37,000 employees. Listed on the Shenzhen Stock Exchange and holding Tier 1 bankable status, the company has built a strong global footprint over two decades, consistently ranking among the top three module suppliers worldwide by shipment volume. Solarspace, established in 2011, is a younger and more focused manufacturer with over 6,000 employees and a stated production capacity exceeding 60 GW. Also Tier 1 bankable, Solarspace has gained recognition for its cell manufacturing capabilities - reportedly ranking second globally in solar cell shipments in the first half of 2025 - and has been actively expanding its presence in key international markets including North America and Europe, notably showcasing new HJT and high-performance N-type modules at RE+ 2025. From a technology standpoint, JA Solar offers a broad and diversified catalog of 524 panel models, where PERC technology accounts for 52.1% of the lineup, reflecting the company's role as a high-volume supplier across multiple market segments. Average module power stands at 441.68 Wp, with a portfolio maximum of 740 Wp and a peak efficiency of 24.4%. For residential rooftop installations, small commercial projects, and buyers who prioritize product availability and brand familiarity, JA Solar's extensive range and proven reliability - underscored by repeated Top Performer recognition in PVEL scorecards - represent clear advantages. Solarspace has made a decisive pivot toward N-type technologies, which represent 69.5% of its 82-model portfolio. This focus translates into a higher average module efficiency of 22.04% compared to JA Solar's 20.87%, a more favorable average temperature coefficient (-0.299%/°C vs. -0.323%/°C), and a bifacial panel share of 92.7% versus 44.3%. The average warranty period of 29.63 years for Solarspace also exceeds JA Solar's 27.85 years. These characteristics make Solarspace particularly well-suited for utility-scale ground-mount and commercial C&I projects where energy yield optimization and long-term durability are the primary drivers. For international buyers choosing between the two, the decision hinges on project scale and technology priorities. JA Solar provides unmatched product variety, a long-established global supply chain, and risk-averse bankability credentials that appeal to residential installers and conservative project financiers. Solarspace presents a compelling case for large-scale developers and engineering firms seeking high-efficiency, N-type bifacial modules with strong yield credentials, though its smaller catalog and comparatively lower brand recognition warrant careful due diligence on regional availability and after-sales support. 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 Solarspace](https://comparepv.com/ae-solar-vs-solarspace) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs Solarspace](https://comparepv.com/aiko-vs-solarspace) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs Solarspace](https://comparepv.com/artsolar-vs-solarspace) --- Source: https://comparepv.com/ja-solar-vs-solarspace Not in this file, on the page: the distributions above drawn as charts.