--- title: "JA Solar vs Top Solar - Brand Comparison | ComparePV" description: "Compare JA Solar vs Top Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-top-solar" --- # JA Solar vs Top Solar JA Solar has the broader catalog (504 vs 1 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | JA Solar | Top Solar | | --- | --- | --- | | Country | China | China | | Headquarters | Beijing | Shenzhen | | Founded | 2005 | | | Employees | 37,289 | 200+ | | Annual capacity | 100+ GW/year | \<1 GW/year | | Tier 1 | yes | | | Listed | SZSE: 002459 | | | Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.topsolar-energy.com](https://www.topsolar-energy.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... Shenzhen Top Solar Energy Co., Ltd. is a Chinese solar panel manufacturer specializing in monocrystalline, flexible, folding, and portable solar panels, as well as off-grid and on-grid solar power systems. The company has its own R&D teams and production lines, serving customers across the US, Europe, Japan, the... ## Catalog & Power | Measure | JA Solar | Top Solar | Margin | | --- | --- | --- | --- | | Panel Models | 504 | 1 | +503 | | Max Power | 740 W | 150 W | +590 W | | Avg Power | 456 W | 150 W | +306 W | ## Efficiency | Measure | JA Solar | Top Solar | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | 18.60% | +6.20 pp | | Avg Efficiency | 21.13% | 18.60% | +2.53 pp | ## Reliability & Warranty | Measure | JA Solar | Top Solar | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.322%/°C | -0.420%/°C | +0.098 | | 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 | Top Solar | | --- | --- | --- | | \<20% | 112 (22.2%) | 1 (100.0%) | | 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 | Top Solar | | --- | --- | --- | | \<400W | 142 (28.2%) | 1 (100.0%) | | 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%) Dominant cell tech: **Back Contact** (100%) | Technology | JA Solar | Top 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 | | Back Contact | 0 | 1 (100.0%) | ## 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, Top Solar | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [TS-EFS150M](https://comparepv.com/panel/top-solar-ts-efs150m) | 150 | 18.6 | -0.420 | Monocrystalline | ## Summary JA Solar and Top Solar are both Chinese photovoltaic module manufacturers, but they occupy vastly different positions in the global market. JA Solar was founded in 2005, employs over 37,000 people, and operates a manufacturing capacity exceeding 100 GW per year, placing it consistently among the top global module suppliers by shipment volume. The company is publicly listed on the Shenzhen Stock Exchange (SZSE) and holds Tier 1 bankable status as recognized by S&P Global Commodity Insights - a critical credential for project financing in utility-scale and commercial segments. JA Solar has an established presence across European markets, including Poland, and its modules are routinely accepted by banks and institutional investors in project finance transactions. Top Solar, by contrast, is a small manufacturer with over 200 employees and a production capacity below 1 GW, with only a single panel model represented in available industry databases. No founding year, Tier 1 recognition, or warranty data is publicly confirmed for Top Solar. JA Solar's portfolio spans 524 panel models covering PERC (52% of the lineup), TOPCon, HJT, and other cell technologies, with a maximum output of 740 Wp and a peak efficiency of 24.4%. The average efficiency across its portfolio stands at approximately 20.9%, and the average temperature coefficient of Pmax is -0.32%/°C - a moderate value that supports reliable performance across climates. Nearly 44% of its lineup consists of bifacial modules, making the brand well-suited for utility-scale ground-mount projects where rear-side gain materially improves yield. An average warranty of close to 28 years further strengthens the value proposition for long-term residential rooftop and commercial C&I installations. Top Solar's single available panel is a 150 Wp Back Contact module with an efficiency of 18.6% and a temperature coefficient of -0.42%/°C. That specification points to a narrow niche focus - possibly space-constrained or specialty low-current applications - rather than mainstream residential or commercial deployment. For international buyers comparing these two manufacturers, JA Solar is the clear choice for the vast majority of project types. Its Tier 1 bankability, extensive and diversified portfolio, strong warranty terms, and proven track record in European markets significantly reduce counterparty and performance risk. Top Solar may serve a very specific role where its Back Contact technology or compact module format is the precise requirement, but its limited single-model portfolio, small production scale, and absence of Tier 1 status make it a high-risk option for any mainstream procurement decision. 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 Top Solar](https://comparepv.com/ae-solar-vs-top-solar) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs Top Solar](https://comparepv.com/aiko-vs-top-solar) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs Top Solar](https://comparepv.com/artsolar-vs-top-solar) --- Source: https://comparepv.com/ja-solar-vs-top-solar Not in this file, on the page: the distributions above drawn as charts.