--- title: "Epever vs JA Solar - Brand Comparison | ComparePV" description: "Compare Epever vs JA Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/epever-vs-ja-solar" --- # Epever vs JA Solar JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | Epever | JA Solar | | --- | --- | --- | | Country | China | China | | Headquarters | Beijing | Beijing | | Founded | 2007 | 2005 | | Employees | 100-500 | 37,289 | | Annual capacity | | 100+ GW/year | | Tier 1 | | yes | | Listed | | SZSE: 002459 | | Website | [https://www.epever.com](https://www.epever.com) | [https://www.jasolar.com](https://www.jasolar.com) | Epever (Beijing Epsolar Technology Co., Ltd.) is a Chinese manufacturer specializing in solar charge controllers, off-grid inverters, and inverter-chargers for solar power systems. Founded in 2007, the company has grown to serve customers globally through a network of over 120 distribution partners. Epever is not a... 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 | Epever | JA Solar | Margin | | --- | --- | --- | --- | | Panel Models | 0 | 504 | +504 | | Max Power | 0 W | 740 W | +740 W | | Avg Power | 0 W | 456 W | +456 W | ## Efficiency | Measure | Epever | JA Solar | Margin | | --- | --- | --- | --- | | Max Efficiency | - | 24.80% | | | Avg Efficiency | - | 21.13% | | ## Reliability & Warranty | Measure | Epever | JA Solar | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | - | -0.322%/°C | | | Bifacial Share | 0 (0%) | 238 (47%) | +47 pp | | Avg Warranty | - | 27.9 yrs | | ## Efficiency distribution JA Solar skews to higher efficiency: 15% of lineup is 23%+ | Efficiency band | Epever | JA Solar | | --- | --- | --- | | \<20% | 0 | 112 (22.2%) | | 20-21% | 0 | 99 (19.6%) | | 21-22% | 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 | Epever | JA Solar | | --- | --- | --- | | \<400W | 0 | 142 (28.2%) | | 400-499W | 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** (49%) | Technology | Epever | JA Solar | | --- | --- | --- | | PERC | 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, 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 Epever, the brand of Beijing Epsolar Technology Co., Ltd., is a Chinese company founded in 2007 and headquartered in Beijing. It specializes in solar power electronics - specifically MPPT solar charge controllers, off-grid and hybrid inverters, and energy storage systems. A critical distinction must be made upfront: Epever is not a solar panel (PV module) manufacturer; it produces balance-of-system (BOS) components and solar accessories. The company holds ISO9001, ISO14001, and ISO45001 certifications, and its products carry CE, RoHS, FCC, and ETL marks. It works with over 120 distribution partners globally, primarily serving the off-grid and DIY solar segments. JA Solar (JA Solar Technology Co., Ltd.) was founded in 2005 in Hebei Province, China, and is now headquartered in Beijing. It consistently ranks among the world's largest solar module manufacturers, holding Tier 1 status from both Bloomberg NEF and S&P Global Commodity Insights. The company reported manufacturing capacity exceeding 100 GW and cumulative global module shipments surpassing 200 GW as of end-2023. In terms of institutional footprint, JA Solar operates on an entirely different scale. Epever's product range targets off-grid residential systems, mobile or remote installations, and backup power setups where a quality charge controller or inverter is the critical component. Its products complement PV installations but do not constitute the panels themselves. JA Solar, by contrast, supplies PV modules across the full spectrum of applications - residential rooftop installs, commercial and industrial (C&I) projects, and large-scale utility-scale ground-mount plants. Its DeepBlue 4.0 Pro and DeepBlue 5.0 series are based on n-type TOPCon cell technology, with the DeepBlue 5.0 reaching module efficiencies above 24%. JA Solar maintains offices and distribution networks across Europe, including Poland. A direct comparison of these two brands as competing solar panel manufacturers is not meaningful - Epever does not make PV modules. For any buyer selecting solar panels, JA Solar is the relevant choice here, offering a well-documented Tier 1 track record, broad product range, and established European presence. Epever is a separate category of supplier - relevant when sourcing charge controllers or off-grid inverters, not when sourcing panels. Written by claude-sonnet from the figures above. ## Other comparisons - [Epever vs A.B. Energy](https://comparepv.com/epever-vs-a-b-energy) - [AE Solar vs JA Solar](https://comparepv.com/ae-solar-vs-ja-solar) - [Epever vs AEET](https://comparepv.com/epever-vs-aeet) - [AIKO vs JA Solar](https://comparepv.com/aiko-vs-ja-solar) - [Epever vs AKCOME](https://comparepv.com/epever-vs-akcome) - [ARTsolar vs JA Solar](https://comparepv.com/artsolar-vs-ja-solar) --- Source: https://comparepv.com/epever-vs-ja-solar