--- title: "JA Solar vs PowMr - Brand Comparison | ComparePV" description: "Compare JA Solar vs PowMr solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/ja-solar-vs-powmr" --- # JA Solar vs PowMr JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup). ## The two companies | Attribute | JA Solar | PowMr | | --- | --- | --- | | Country | China | China | | Headquarters | Beijing | Shenzhen | | Founded | 2005 | 2014 | | Employees | 37,289 | 100-200 | | Annual capacity | 100+ GW/year | | | Tier 1 | yes | | | Listed | SZSE: 002459 | | | Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://powmr.com](https://powmr.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... PowMr, the brand name of Shenzhen Hehejin Industrial Co., Ltd., is a Chinese manufacturer specializing in solar charge controllers (MPPT and PWM), pure sine wave inverter chargers, hybrid inverters, and off-grid solar power systems. The company targets residential and small commercial off-grid and hybrid applications... ## Catalog & Power | Measure | JA Solar | PowMr | 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 | PowMr | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | - | | | Avg Efficiency | 21.13% | - | | ## Reliability & Warranty | Measure | JA Solar | PowMr | 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 | PowMr | | --- | --- | --- | | \<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 | PowMr | | --- | --- | --- | | \<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 | PowMr | | --- | --- | --- | | 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 was founded in 2005 in China and has grown into one of the world's largest solar module manufacturers, employing over 37,000 people and operating production capacity exceeding 100 GW. Listed on the Shenzhen Stock Exchange, the company holds Bloomberg NEF Tier 1 (bankable) status, which qualifies its modules for non-recourse project finance and makes it a credible supplier for investors and banks across all project scales. In 2025 JA Solar ranked second on SolarReviews' Best Solar Brands list and earned its tenth consecutive PVEL Top Performer designation - an independently verified measure of long-term reliability. PowMr, founded in 2014, is a much smaller operation with only 100-200 employees. The company focuses on solar inverters, MPPT charge controllers, and hybrid or off-grid power systems rather than photovoltaic module manufacturing, and it carries no panel portfolio in available industry databases. JA Solar's product catalogue spans 524 panel models with a maximum output of 740 Wp and a peak efficiency of 24.4%. PERC technology dominates the lineup at over 52% of offerings, while bifacial designs account for nearly 44% of the range - a meaningful advantage for ground-mount and light-reflective rooftop applications. Average module power sits around 442 Wp, and the average warranty across the portfolio approaches 28 years. European warehousing and certifications make the brand readily accessible for residential rooftop installs, commercial and industrial (C&I) projects, and utility-scale ground-mount farms alike. PowMr, by contrast, occupies the budget Balance-of-System segment: its inverters and charge controllers can serve small off-grid cabins, backup power setups, and DIY solar builds where upfront cost is the primary driver, though user reviews are mixed and after-sales support has been flagged as inconsistent. For international buyers evaluating the two as PV module suppliers, the comparison is fundamentally asymmetrical. JA Solar is a globally recognized, Tier 1 bankable manufacturer with a deep, well-documented panel portfolio and strong independent performance validation - the appropriate choice for virtually any module procurement decision. PowMr does not offer an equivalent panel product and should not be evaluated on the same basis. Buyers sourcing off-grid inverters or MPPT controllers on a constrained budget may find PowMr worth considering, but should account for the reliability and support caveats reported by field users before committing to larger deployments. 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 PowMr](https://comparepv.com/ae-solar-vs-powmr) - [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet) - [AIKO vs PowMr](https://comparepv.com/aiko-vs-powmr) - [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome) - [ARTsolar vs PowMr](https://comparepv.com/artsolar-vs-powmr) --- Source: https://comparepv.com/ja-solar-vs-powmr Not in this file, on the page: the distributions above drawn as charts.