About Us

More than 30 years of history and experience

What does CHAYO do?

Changyou Technology (Zhejiang) Co., Ltd. is a professional electrical technology company specializing in circuit protection, smart power control, and intelligent distribution solutions.

With roots dating back to 1993, the "tongou" brand has built strong expertise in traditional circuit protection devices, including ELCB, MCB, RCCB, RCBO, Switch-Disconnector, Distribution Box, MCCB, ACB, photovoltaic protection devices, and EV charging protection solutions.
In 2021, Changyou Technology launched the "chayo" brand to further expand into the smart electrical sector. Chayo focuses on smart circuit breakers, DIN-rail smart switches, smart gateways, intelligent energy monitoring, AI smart distribution systems, and integrated AI-powered power management solutions.
From reliable mechanical protection to intelligent AI-driven electrical systems, Changyou Technology is committed to connecting traditional electrical safety with the future of smart energy management, delivering advanced solutions for homes, businesses, industry, solar energy, and new energy infrastructure.

80+ Staff

Strong production team, excellent after-sales service

30+ Years

Rich professional and customer service experience

Certificates

We are a Qualified & Certified Electrical Company

We cooperate with many well-known large-scale certification agencies, such as TUV, VDE, SAA, BV, Intertek, CCC. The product testing experiments are all certified by CNAS laboratories. According to IEC, EN, GB, AS/NZS and other standards, we can Quickly provide our certificate or test report to the customer who needs it, and we can also obtain the corresponding certificate according to the customer's requirements.

Our Advantages

Reasons You Should Choose Us

Chayo is your source for a complete range of high-quality electrical products, including product technical support, factory price support and delivery speed support.

Would you like to Get Samples
From Chayo?

We are very happy to provide our samples to customers for testing and debugging. Please send a message to us now

Send a Message Sampe Request

Factory Shooting

ISO 9001 certification

All our staffs and machines within an Integrated Management System which passed ISO 9001 Quality System to ensure the delivery of services that are at an exception level of quality, reliability, and value.