MAIN PRODUCTS
We provide DC Isolation Switch, Miniature Circuit Breaker, DC Surge Protector, Rapid Shutdown, Micro Inverter, Smart Electricity Meter and other components for Solar and Energy Storage System use.
INDUSTRY SOLUTIONS
We offer all needed DC and AC power distribution components for PV and energy storage systems use, which can be applied to various scenarios, such as residential rooftops, commercial buildings and industrial rooftops.
Residential Solar and Energy Storage System
Residential photovoltaic + energy storage power stations can be divided into various working modes such as backup power supply, self-use, peak shaving and valley filling, etc. By combining hybrid inverter and EPS switching box, the system can miximize the usage of mains power, photovoltaic power, and EPS energy storage power, greatly improving the utilization rate of electric energy.
View MorePROJECTS

PPOJOY Circuit Breaker
Location: Brazil

PPOJOY Circuit Breaker
Location: USA

PPOJOY Isolating Switch
Location: Saudi Arabia

PPOJOY Array-Level Rapid Shutdown
Location: Germany

PPOJOY Array-Level Rapid Shutdown
Location: Ireland
ABOUT PROJOY
Projoy Electric Co., Ltd (PROJOY ELECTRIC) was founded in 2011 and headquartered in Suzhou, China. It is a pioneer manufacturer in China that focusing on providing protection, safety and metering products, such as DC Isolation Switch, Miniature Circuit Breaker, DC Surge Protector, Rapid Shutdown, Micro Inverter, Smart Electricity Meter and other accessory products for PV and Energy Storage System use.
Our Vision
Focusing on the concept of “Switch to Safety”, we will never stop innovating for a safer and smarter new energy world.
Our Mission
To continue our dedication to providing a wide range of well-designed safety products, exceptional customer service, and great experiences.

Years experience in PV & energy storage industry
R&D talents globally
Production Lines
Exported to more than 60 countries
Of China's mainstream energy storage inverter / PAck manufacturer are using Projoy's DC MCB.
Of China's mainstream inverter manufacturers are using Projoy's PV isolators.
GLOBAL PARTNERS
Empower innovation in industries and continuously contribute towards a better future.


















NEWS & EVENTS
2025-08-29
Understanding DC Circuit Breakers: Essential Components for Electrical Safety
--- DC circuit breakers are essential components in the realm of electrical safety, particularly in systems that operate on direct current (DC). Unlike their alternating current (AC) counterparts, DC circuit breakers are specifically designed to handle the unique characteristics of DC power, making them indispensable in various applications, from renewable energy systems to industrial equipment. A
2025-08-12
The Importance of Rapid Shutdown in Modern Electrical Systems
Rapid Shutdown is a safety feature designed to quickly disconnect electrical systems from their power sources in emergency situations. This mechanism is particularly important in environments where electrical hazards could pose a significant risk to individuals or equipment. The Rapid Shutdown process ensures that electrical components can be de-energized swiftly, minimizing the potential for elec