--- title: "JA Solar vs Sigenergy - Brand Comparison | ComparePV" description: "Compare JA Solar vs Sigenergy solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-sigenergy" --- # JA Solar vs Sigenergy JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | JA Solar | Sigenergy | | --- | --- | --- | | Country | China | China | | Headquarters | Beijing | Shanghai | | Founded | 2005 | 2022 | | Employees | 37,289 | 500-1000 | | Annual capacity | 100+ GW/year | | | Tier 1 | yes | | | Listed | SZSE: 002459 | HKEX: 6656 | | Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.sigenergy.com](https://www.sigenergy.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... Sigenergy is a Shanghai-based energy technology company specializing in all-in-one solar inverters, battery energy storage systems (BESS), and EV chargers for residential, commercial, and utility-scale applications. Founded in 2022 by Tony Xu, a former Huawei Smart PV executive, the company positions itself as the... ## Catalog & Power | Measure | JA Solar | Sigenergy | 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 | Sigenergy | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | - | | | Avg Efficiency | 21.13% | - | | ## Reliability & Warranty | Measure | JA Solar | Sigenergy | 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 | Sigenergy | | --- | --- | --- | | \<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 | Sigenergy | | --- | --- | --- | | \<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 | Sigenergy | | --- | --- | --- | | 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 largest solar panel manufacturers, founded in 2005 in China and listed on the Shenzhen Stock Exchange (SZSE). With over 37,000 employees and a production capacity exceeding 100 GW, the company holds Tier 1 bankable status and ranks second globally by shipment volume. Its portfolio spans 524 panel models with a maximum output of 740 Wp and an average module efficiency of approximately 20.9%, with PERC technology dominating more than 52% of its lineup and the newer TOPCon-based Deep Blue 4.0 series pushing performance further. Sigenergy is a fundamentally different type of business - founded in 2022 and listed on the Hong Kong Stock Exchange (HKEX) following an IPO in April 2025 that raised over HK$4.4 billion, it does not manufacture solar panels at all. Employing between 500 and 1,000 people, Sigenergy focuses exclusively on hybrid inverters, battery energy storage systems, and EV charging equipment, reporting revenues of RMB 9 billion in 2025 with overseas sales accounting for 99% of its total across 85 countries. JA Solar's strength lies in the depth and reliability of its module portfolio. The PERC-based Deep Blue 3.0 series is well-suited for residential rooftop installs, while the TOPCon-powered Deep Blue 4.0 targets higher-efficiency demands in commercial C&I and utility-scale ground-mount projects. A tenth consecutive Top Performer designation in PVEL's 2025 scorecard and an average warranty of nearly 28 years across its catalog make JA Solar a bankable choice wherever long-term yield and financeable assets are priorities. Sigenergy's flagship SigenStor integrates a PV inverter, DC EV charging module, LFP battery, energy storage converter, and energy management platform into a single modular unit, making it particularly well-suited for residential prosumers seeking a complete home energy solution. The company's SigenStack platform scales this approach for larger C&I storage applications. The two companies are not direct competitors - JA Solar supplies the modules, while Sigenergy supplies the storage and inverter systems that sit alongside them. Buyers selecting a module supplier will find JA Solar's combination of Tier 1 bankability, 100+ GW capacity, competitive pricing, and a long reliability record a strong proposition. Those seeking a tightly integrated all-in-one storage and inverter solution will find Sigenergy's approach compelling, though the brand's short track record and a 2025 inverter recall in Australia are factors worth weighing against its rapid growth and strong installer adoption in key European and Asia-Pacific markets. 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 Sigenergy](https://comparepv.com/ae-solar-vs-sigenergy) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs Sigenergy](https://comparepv.com/aiko-vs-sigenergy) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs Sigenergy](https://comparepv.com/artsolar-vs-sigenergy) --- Source: https://comparepv.com/ja-solar-vs-sigenergy Not in this file, on the page: the distributions above drawn as charts.