--- title: "Corab vs JA Solar - Brand Comparison | ComparePV" description: "Compare Corab vs JA Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/corab-vs-ja-solar" --- # Corab vs JA Solar JA Solar has the broader catalog (504 vs 5 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | Corab | JA Solar | | --- | --- | --- | | Country | Poland | China | | Headquarters | Olsztyn | Beijing | | Founded | 1993 | 2005 | | Employees | 300+ | 37,289 | | Annual capacity | 2.5 GW/year | 100+ GW/year | | Tier 1 | | yes | | Listed | | SZSE: 002459 | | Website | [https://www.corab.pl](https://www.corab.pl) | [https://www.jasolar.com](https://www.jasolar.com) | Corab is a leading Polish manufacturer of steel photovoltaic structures and a distributor of devices from renowned brands in the renewable energy sector. They design and produce assembly structures for various types of roofs and surfaces and are also a distributor of photovoltaic modules, inverters, and energy storage... 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... ## Catalog & Power | Measure | Corab | JA Solar | Margin | | --- | --- | --- | --- | | Panel Models | 5 | 504 | +499 | | Max Power | 410 W | 740 W | +330 W | | Avg Power | 397 W | 456 W | +59 W | ## Efficiency | Measure | Corab | JA Solar | Margin | | --- | --- | --- | --- | | Max Efficiency | 21.00% | 24.80% | +3.80 pp | | Avg Efficiency | 20.60% | 21.13% | +0.53 pp | ## Reliability & Warranty | Measure | Corab | JA Solar | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.337%/°C | -0.322%/°C | +0.015 | | Bifacial Share | 0 (0%) | 238 (47%) | +47 pp | | Avg Warranty | 25.0 yrs | 27.9 yrs | +2.9 yr | ## Efficiency distribution JA Solar skews to higher efficiency: 15% of lineup is 23%+ | Efficiency band | Corab | JA Solar | | --- | --- | --- | | \<20% | 1 (20.0%) | 112 (22.2%) | | 20-21% | 3 (60.0%) | 99 (19.6%) | | 21-22% | 1 (20.0%) | 112 (22.2%) | | 22-23% | 0 | 107 (21.2%) | | 23%+ | 0 | 74 (14.7%) | ## Power distribution JA Solar offers more 600W+ panels (14% of lineup) | Power band | Corab | JA Solar | | --- | --- | --- | | \<400W | 1 (20.0%) | 142 (28.2%) | | 400-499W | 4 (80.0%) | 173 (34.3%) | | 500-599W | 0 | 120 (23.8%) | | 600-699W | 0 | 60 (11.9%) | | 700W+ | 0 | 9 (1.8%) | ## Cell technology Dominant cell tech: **PERC** (100%) Dominant cell tech: **PERC** (49%) | Technology | Corab | JA Solar | | --- | --- | --- | | PERC | 5 (100.0%) | 247 (49.0%) | | TOPCon | 0 | 146 (29.0%) | | N-type | 0 | 90 (17.9%) | | Unknown | 0 | 16 (3.2%) | | HJT | 0 | 5 (1.0%) | ## Top panels, Corab | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [EC410M-10-108FB-V](https://comparepv.com/panel/corab-ec410m-10-108fb-v) | 410 | 21.0 | -0.330 | Monocrystalline | | 2 | [EC405M-10-108B-V 405 Wp](https://comparepv.com/panel/corab-ec405m-10-108b-v-405-wp) | 405 | 20.9 | -0.330 | Monocrystalline | | 3 | [EC405M-10-108B-V](https://comparepv.com/panel/corab-ec405m-10-108b-v) | 405 | 20.9 | -0.330 | Monocrystalline | | 4 | [EC405M-10-108B](https://comparepv.com/panel/corab-ec405m-10-108b) | 405 | 20.9 | -0.330 | Monocrystalline | | 5 | [ENCOR EC360M-6-120FB](https://comparepv.com/panel/corab-encor-ec360m-6-120fb) | 360 | 19.3 | -0.365 | Monocrystalline | ## 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 Corab is a Polish manufacturer founded in 1993 in Bartoszyce, employing more than 300 people and operating with a stated production capacity of 2.5 GW. Originally rooted in satellite and construction hardware, the company expanded into solar mounting systems before launching its own Encor-branded PV modules. Its solar panel portfolio is compact at four models, oriented primarily toward the domestic Polish and broader European market, with local warranty fulfilment as a key differentiator. JA Solar, founded in 2005 in China, operates at an entirely different scale: a Tier 1 bankable manufacturer listed on the Shenzhen Stock Exchange, employing nearly 37,300 people, and running a production capacity exceeding 100 GW - roughly forty times that of Corab. Ranked second worldwide by shipment volume, JA Solar supplies markets across Europe, Asia, the Americas, and Australia with a portfolio of 524 panel models ranging up to 740 Wp. Corab's Encor modules are monocrystalline half-cut panels with no bifacial options currently available, reaching a maximum efficiency of 21% and a peak output of 410 Wp. With an average temperature coefficient of -0.34%/°C, they are well suited for standard residential rooftop installs in temperate climates, and the Polish-issued product warranty simplifies after-sales logistics for local installers. JA Solar's portfolio covers a far broader technological spectrum: PERC technology accounts for roughly 52% of its lineup, while TOPCon-based series push peak efficiency to 24.4% and peak output to 740 Wp. Approximately 44% of JA Solar's panels are bifacial, making them a strong fit for utility-scale ground-mount projects and large commercial C&I installations where rear-side irradiance gain delivers measurable additional yield. An average temperature coefficient of -0.32%/°C and a tenth consecutive "Top Performer" designation in PVEL's 2025 scorecard reinforce JA Solar's suitability for institutionally financed projects. For residential and small commercial installers in Poland seeking a locally supported product with straightforward warranty logistics, Corab Encor is a practical, fit-for-purpose choice. For buyers prioritising maximum power output, advanced cell technology, bifacial yield gains, or the bankability documentation required for project finance - whether in Poland or internationally - JA Solar's portfolio depth and proven global track record make it the more versatile and widely applicable option. Written by claude-sonnet from the figures above. ## Other comparisons - [Corab vs A.B. Energy](https://comparepv.com/corab-vs-a-b-energy) - [AE Solar vs JA Solar](https://comparepv.com/ae-solar-vs-ja-solar) - [Corab vs AEET](https://comparepv.com/corab-vs-aeet) - [AIKO vs JA Solar](https://comparepv.com/aiko-vs-ja-solar) - [Corab vs AKCOME](https://comparepv.com/corab-vs-akcome) - [ARTsolar vs JA Solar](https://comparepv.com/artsolar-vs-ja-solar) --- Source: https://comparepv.com/corab-vs-ja-solar Not in this file, on the page: the distributions above drawn as charts.