About Us
Reliable Protection · Certified Quality · Factory Direct
About Us
Nanjing Yihua Technology Co., Ltd. is a professional integrated R&D and manufacturing factory specializing in photovoltaic DC protection and surge protection (SPD) electrical components, rooted in Nanjing, Jiangsu, China.
As a genuine source manufacturer, we own standardized automated production workshops, a professional internal testing laboratory and a mature technical R&D team. Our products cover PV DC SPDs, PV DC circuit breakers, DC fuses and holders, MC4 solar connectors and PV combiner boxes — serving lightning protection needs across new-energy PV, energy storage, industrial distribution and commercial electrical systems.
Comprehensive Global Certifications & Compliance
Quality assurance and global market accessibility are our core competitive strengths. Our entire product portfolio has passed authoritative international third-party certifications, fully compliant with global mainstream industry standards: ・System certification: ISO9001 Quality Management System, ISO14001 Environmental Management System ・Product safety certification: CE (Low Voltage Directive / EMC), TUV, CB, IEC 61643-11, IEC 61643-31 PV SPD Standard, EN 50539, SGS, RoHS All testing and certification procedures are completed by internationally recognized certification bodies, eliminating market access barriers for clients exporting to Europe, Southeast Asia, the Middle East, Australia and beyond.
Manufacturing & Quality Control Strength
From raw material incoming inspection, semi-finished assembly and offline aging tests to 100% finished-product inspection before shipment, we implement full-process closed-loop quality management. Equipped with automated assembly lines, lightning impulse test equipment, high-low temperature aging chambers and precision electrical performance testers, we strictly control product stability, safety and service life to meet the demands of long-term outdoor PV operation. We support standardized bulk supply, OEM & ODM customized development, private label service, flexible MOQ and fast sample delivery. Our products are widely recognized by distributors, EPC contractors, electrical wholesalers and system integrators across over 40 countries worldwide.
Our Commitment: Adhering to "Reliable Protection, Certified Quality, Factory Direct Supply", we provide one-stop technical consultation, product selection, certification support and after-sales service for global partners.
Certifications
Closed-loop quality control from R&D to shipment