--- title: "JA Solar vs Sonnen - Brand Comparison | ComparePV" description: "Compare JA Solar vs Sonnen solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-sonnen" --- # JA Solar vs Sonnen JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | JA Solar | Sonnen | | --- | --- | --- | | Country | China | Germany | | Headquarters | Beijing | Wildpoldsried | | Founded | 2005 | 2010 | | Employees | 37,289 | 1000-2000 | | Annual capacity | 100+ GW/year | | | Tier 1 | yes | | | Listed | SZSE: 002459 | | | Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://sonnengroup.com](https://sonnengroup.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... Sonnen is a German energy storage technology company specializing in intelligent home battery systems, most notably the sonnenBatterie — the world's first all-in-one lithium-ion home battery system commercially available. The company also develops virtual power plant (VPP) solutions and energy community platforms... ## Catalog & Power | Measure | JA Solar | Sonnen | 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 | Sonnen | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | - | | | Avg Efficiency | 21.13% | - | | ## Reliability & Warranty | Measure | JA Solar | Sonnen | 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 | Sonnen | | --- | --- | --- | | \<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 | Sonnen | | --- | --- | --- | | \<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 | Sonnen | | --- | --- | --- | | 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 Sonnen operate in fundamentally different segments of the solar energy market, making a direct comparison as solar panel manufacturers impossible. JA Solar, founded in 2005 and headquartered in China with shares listed on the Shenzhen Stock Exchange, is one of the world's largest solar panel producers, with a module manufacturing capacity exceeding 100 GW, a workforce of over 37,000 employees, and sustained Tier 1 bankable status recognized by both BloombergNEF and S&P Global Commodity Insights. The company ranks among the top two globally in module shipments and maintains an active commercial presence across key European markets, including Poland, Germany, France, and Italy. Sonnen, founded in 2010 in Germany and acquired by Shell in 2019, is not a solar panel manufacturer - it specializes exclusively in residential and small-commercial battery energy storage systems and carries no panel portfolio whatsoever. JA Solar's product lineup spans 524 panel models, reaching up to 740 Wp in peak power output and 24.4% in maximum cell efficiency, with an average efficiency across the portfolio of approximately 20.9%. The range is anchored by PERC technology (over 52% of models), complemented by an expanding TOPCon offering under the Deep Blue 4.0 branding. Approximately 44% of its panels are bifacial, making them well suited for utility-scale ground-mount projects and large commercial C&I rooftop installations where rear-side gain adds meaningful energy yield. Residential rooftop installs benefit from the broad mid-range PERC selection and an average product warranty approaching 28 years. Sonnen's offering - centered on the sonnenBatterie home storage platform and a virtual power plant network that has surpassed 250 MWh of combined capacity in Germany - serves a strictly complementary role, storing surplus solar energy generated by panels from any manufacturer, including JA Solar. For international buyers, the two brands address entirely different purchasing decisions and should not be viewed as alternatives to one another. A developer or installer selecting modules for residential, commercial, or utility-scale projects will find JA Solar's broad, competitively priced, Tier 1-certified portfolio directly relevant. A homeowner or energy manager seeking to add storage to an existing or new PV system may find Sonnen's mature, German-engineered battery platform compelling, particularly in markets where dynamic electricity tariffs or self-consumption optimization are a priority. The most natural outcome is selecting both - JA Solar panels paired with a Sonnen storage unit. 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 Sonnen](https://comparepv.com/ae-solar-vs-sonnen) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs Sonnen](https://comparepv.com/aiko-vs-sonnen) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs Sonnen](https://comparepv.com/artsolar-vs-sonnen) --- Source: https://comparepv.com/ja-solar-vs-sonnen Not in this file, on the page: the distributions above drawn as charts.