About Us
A smart control and digital energy product supplier providing HVAC control products, digital energy products, and custom control PCBA solutions.
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ABOUT US
Engineering Innovation, Manufacturing Excellence
Founded in 2018 in Jining, Shandong Province, TWJ is an integrated industry and trade manufacturer combining independent R&D, mass production and cross-border supply. With a 7,500-square-meter modern standardized factory, we focus on new energy EV charging, HVAC intelligent control and PCBA electronic processing.
Our services cover circuit design, PCB prototyping, SMT mounting, THT soldering, complete assembly, aging tests and global delivery. We support AC and DC household EV chargers, HVAC control products, PCBA assembly and hardware/software ODM and OEM customization for international customers.
Company Capabilities
R&D and Manufacturing Strength
TWJ operates dedicated hardware and software R&D teams, developing embedded software, customized PCBA hardware, product structures and application-ready control solutions.
Independent R&D Center
Dedicated hardware and software teams support embedded software, PCBA design, product structure development and custom mold projects.
Automated SMT Production
11 JUKI medium and high-speed SMT lines deliver over 16 million mounting points per day for stable sample and mass production.
Reliability Laboratory
In-house testing covers high voltage, thermal shock, mechanical strength, temperature cycling, durability and full-load aging.
Certified Quality System
ISO9001-based full-process QC, CE, RoHS, LVD and EMC compliance help customers shorten certification and delivery cycles.
Factory Showcase
Inside Our Smart Manufacturing Facility
Take a closer look at our modern production facility, where advanced automation, precision manufacturing and strict quality control come together.