Choose from a complete range of power products designed to protect equipment, improve efficiency, and keep systems running smoothly—from voltage regulation to backup and conversion. Tell us your input/output voltage, kVA, application, and country standard—we’ll recommend the right model.
30 years of independent R&D and production for voltage regulation solutions across home, commercial, and industrial use.
Step-up/step-down conversion and customized winding solutions for multiple voltage standards.
Efficient DC–AC conversion with multi-protection and smart cooling control.
Multi-level adjustment and protection functions for controlled charging and reliable storage support.
Founded in 2007, Yueqing Johsun Tec Electrical Co., Ltd is a professional manufacturer of power supply products, specializing in voltage regulators, transformers, UPS, inverters, and solar solutions.
With 20+ years of experience, we provide reliable products, flexible OEM/ODM services, and stable delivery to support customers in global markets.
Since 2007, we have specialized in voltage regulators and transformers. We offer full-spectrum customization.
ISO 9001:2008 managed and CE/FCC/IC certified. Our products undergo multiple rounds.
From industrial regulators to solar photovoltaic systems, we provide one-stop integrated power resources.
20+ years of expertise in Voltage Regulators, Transformers, and UPS for industrial safety.
Full customization from technical parameters to product appearance and sample development.
Sustainable Solar Photovoltaic systems, including inverters and panels for carbon neutrality.
Certified 15+ year supplier offering flexible trade terms (EXW/FOB/DDP) and remote technical guidance.
With a production history since 2007, our facility in the Xiangyang Industrial Zone integrates advanced R&D with rigorous ISO9001:2008 standards. We ensure a 100% yield through multiple stages of technical debugging, delivering certified power solutions to over 20 countries worldwide.
Engineered with high-sensitivity response technology to ensure a consistent, safe voltage output.
uilt with premium copper/aluminum materials for superior heat dissipation and low energy loss.
High-efficiency power conversion optimized for solar photovoltaic ecosystems.
Give us these and an engineer replies, with the model, the price and the lead time:
Six situations that account for most of the enquiries we quote. Pick the one closest to your job and go straight to the product family.
A 110V machine, tool or appliance running on a 220-240V site — the single most common reason buyers land on a DT/ST page.
A fixed control rail for PLC supplies, relays and sensors where the panel voltage differs from the plant supply.
Feeders that sag to 160-190V and climb past 250V. Relay stabilizers for general loads, servo for sensitive instruments.
Continuously adjustable 0-250V for sweep testing, burn-in racks, motor trim and relay pick-up checks.
Custom voltage, socket standard, front panel and packaging from 50 pcs, with CE / RoHS documentation.
Thirteen DT/ST capacities on three frames plus matching stabilizers, so one supplier covers 110V and 220V markets.
Ratings, protection, carton quantities and FOB bands on three pages each — the same documents our distributors file with their tenders.
Step up & step down autotransformer — ratings, cartons, FOB bands
Need the routine test report, a CE / RoHS declaration or an ISO 9001 reference for customs and tender submission? Ask for the documentation pack.
Our products are trusted for their superior quality and reliability. Fill out the form and we will answer any questions you may have.
