Our website uses cookies to improve your experience and record usage statistics. By using our site you consent to cookies as described in our Privacy Policy. We take your privacy and data security very seriously and all information collected will be kept strictly confidential.
Combined Switch： Smart Electric Isolator Switch for Energy Storage Systems
2025-07-7
As global demand for renewable energy and power reliability grows, thecombined switch, also known as an electric isolator switch, has emerged as a crucial component in modern battery energy storage systems (BESS) and smart energy infrastructure. GRL’s intelligent switch solutions are not only designed for safety and performance but also to integrate seamlessly with Battery Management Systems (BMS) and Energy Management Systems (EMS) for next-level automation and efficiency.
What Is a Combined Switch (Electric Isolator Switch)?
A combination switch is an intelligent electrical device that integrates switching, load management, and protection into a single compact unit. Unlike traditional isolators or mechanical disconnects, which only support manual operations, a combined switch enables automated electrical isolation, rapid fault response, and real-time communication with other system components.
These smart isolator switches manage the power flow between the grid, photovoltaic systems, batteries, and connected loads. They enable precise circuit control, safe fault interruption, and dynamic energy management, making them essential in smart grids, microgrids, off-grid systems, and commercial & industrial energy applications.
Core Features and Advantages
Multi-Mode Switching Capability
The combined switch enables seamless transition between grid-tied, off-grid, and hybrid power supply modes. When grid failure occurs, it instantly switches to battery backup within milliseconds, ensuring uninterrupted power to critical systems.
Intelligent Energy Scheduling
By integrating with TOU (time-of-use) pricing models, the switch charges batteries during off-peak hours and discharges during peak times. When linked to EMS, it optimizes usage using AI-driven load forecasting and dispatch.
Active Protection and Fault Isolation
The electric isolator switch offers layered protection against overvoltage, short circuits, and overcurrent. Working alongside BMS, it performs rapid, automated circuit isolation to prevent damage, avoiding common issues such as relay welding or fuse burnout.
Communication and Interoperability
Supporting standard protocols like Modbus and CAN, the device easily communicates with PV inverters, grid controllers, and storage platforms. This ensures unified system behavior and intelligent coordination.
Where Are Combined Switches Used?
Industrial & Commercial Energy Storage
Reduces electricity bills through peak shaving and demand charge reduction, while ensuring reliable backup during outages.
Microgrids and Remote Energy Systems
Coordinate between diesel generators, solar PV, and battery systems to provide stable power in off-grid or unstable-grid areas.
EV Charging Infrastructure
Supports load balancing and system protection in fast-charging stations, especially when paired with on-site storage.
Why Choose GRL’s Combined Switch?
Certified to international standards (IEC/EN 60947-3, GB/T 14048.3)
Fast switching time (<10 ms) for high-reliability applications
Supports up to 1500VDC and various current ratings for scalability
Seamless compatibility with battery modules, PCS, EMS, and grid inverters
Designed for long lifespan, low maintenance, and modular integration
FAQ
Q1: What’s the difference between a combined switch and a traditional circuit breaker? A1: Circuit breakers trip passively and may not respond fast enough in some storage applications. Combined switches offer active, intelligent protection with faster disconnection and remote operation capabilities.
Q2: Is a combined switch the same as a disconnect switch? A2: Not exactly. A disconnect switch or manual isolator only opens the circuit. A combined switch provides switching, isolation, and communication in a single intelligent unit.
Q3: Can it be used in solar systems? A3: Yes. Combined switches are ideal for PV + battery hybrid systems, offering safe transition and dynamic power routing between sources.
Q4: Does it support modular microgrid setups? A4: Absolutely. These switches are commonly used in microgrid controller cabinets and modular systems where real-time isolation and switching are required.
The combined switch represents the future of smart electric isolation. With advanced safety features, automation capabilities, and grid-ready intelligence, it is quickly becoming a must-have in modern energy systems. Whether you’re building a smart factory, setting up a renewable microgrid, or upgrading your EV infrastructure, GRL’s electric isolator switch solutions deliver the safety, flexibility, and intelligence your system needs.
