Pre-charge circuits play an important role in residential energy storage systems by helping reduce inrush current during startup and supporting stable system operation.

As battery energy storage systems continue moving toward higher voltages and larger capacities, effective DC protection is becoming increasingly important for operational reliability and system safety.

As utility-scale battery energy storage systems continue to expand, 1500V architecture is increasingly being adopted to support system efficiency, scalability, and optimized design. Understanding its technical considerations helps developers and manufacturers evaluate future energy storage solutions.

In the first half of 2026, the energy storage industry is accelerating its growth, driven by technological innovation, supportive policies, and expanding applications. From utility-scale to residential use, smart energy management systems and advanced battery solutions are transforming how energy is stored and used, supporting a low-carbon and sustainable future.

Booming AI data centers and energy storage are fueling the rapid adoption of 800V high‑voltage DC systems.
Take a look at how DC contactors and DC fuses are evolving and being widely used across the industry.

As energy storage scales up to 6MW+ power, 8MWh+ capacity with 1500V DC mainstream and 2000V DC in development, core DC control and protection components (DC contactors and fuses) are fully upgraded. They feature higher current resistance, stronger breaking capacity, superior voltage endurance, wide-temperature stability and intelligent functions. Contactors are optimized for larger current and miniaturization, while fuses support intelligent monitoring and graded protection. Both are advancing toward standardization and full-scenario customization to underpin high-power energy storage development and low-carbon targets.

Driven by exponential AI computing demand, AI power supplies stand at the forefront of global power electronics evolution. Built for high reliability, extreme power and continuous operation, modern AI power systems leverage SiC/GaN wide bandgap semiconductors, advanced SST architectures and high-precision chip-level power management to serve AI data center, training and edge scenarios.
Supported by full upstream-midstream-downstream industrial upgrading, the global AI server power market is set to surge from USD 6.5B (2025) to USD 60.8B (2031), while the 800V HVDC market maintains over 40% annual growth. As global AI infrastructure scales up, high-performance AI power will remain one of the highest-growth strategic tracks in the coming decade.

DC contactors and DC fuses form BESS’s high-voltage DC safety barrier through hierarchical and functional cooperation. Contactors handle on-off control, pre-charging and emergency cut-off across battery, high-voltage cabinet and PCS levels, selected for 1000–1500 VDC adaptability and current withstand capability. Fuses provide ultimate short-circuit/overload protection at multiple levels, using aR-class high-speed types with matching breaking capacity. Their coordination ensures BESS safety, while contact welding and slow small-overload response risks are mitigated by BMS/EMS control and hierarchical protection.

Against the backdrop of booming AI large models and intelligent computing infrastructure, fuses serve as the critical circuit protection component for high-power AI servers and industrial servers. As a professional fuse supplier and distributor, the company provides high-voltage DC fuses and smart fuses featuring high breaking capacity, fast response, miniaturization and full-scenario adaptability. Driven by the rapid growth of server demand, fuse technologies are advancing toward high voltage, intelligence, integration and liquid cooling adaptation, while domestic substitution accelerates. System-level fuse protection solutions effectively enhance the safety and reliability of server systems, supporting the stable development of digital infrastructure and intelligent manufacturing.

DC contactors are critical core components in AI power supply systems, widely applied in AI data centers (AIDC), AI servers, high-voltage DC power supplies, energy storage UPS, and edge/vehicle-mounted AI equipment. Their core functions include high-voltage power distribution, load switching, surge suppression, overcurrent protection, and battery charge discharge control, with good adaptability to 48V/800V HVDC architectures, high power density and millisecond-level load fluctuations. Equipped with advanced arc extinguishing, intelligent control, low contact resistance and long mechanical life, they ensure the stability, safety and reliability of AI infrastructure. Driven by AI development, demand for higher voltage, current, reliability and intelligence of DC contactors is growing, promoting their evolution toward higher ratings, intelligent monitoring, low power consumption and integration. Proper selection of DC contactors is essential for the stable operation of AI servers and data center power systems, supporting the sustainable development of the AI industry.

Against the backdrop of accelerating global energy transition, surging demand for new energy infrastructure in Europe and the Middle East, together with China’s policy support for energy storage and EV charging sectors, has boosted the market for core power components including DC contactors and fuses. Driven by robust overseas demand, China’s related exports saw a sharp year-on-year increase in Q1 2026, while global and domestic new energy storage installations are expected to grow substantially in 2026. Higher technical requirements have been put forward for these components to adapt to high-voltage, fast-charging and long-cycle scenarios. With the accelerating localization of domestic high-voltage DC contactors, the industry will move toward higher integration, lower power consumption and intelligence, further underpinning the high-quality development of the global new energy industry and low-carbon energy system.

As a wholly-owned subsidiary of Delta Electronics, Cyntec has evolved into a high-density integration solution provider with core strengths in powder metallurgy and SiP technologies. It focuses on three major product lines: magnetic components, power modules, and resistor sensors, serving high-growth fields including AI computing and 800V new energy vehicles. Its TLVR inductor technology supports ultra-high current for high-performance GPUs, while highly integrated power modules deliver miniaturization and reliability for automotive ADAS, OBC and DC-DC systems. For 800V BMS applications, Cyntec provides high-precision, high-power sensing solutions that meet strict automotive safety standards. With dedicated product solutions for 2025–2026, the company will continue material and process innovation to empower global development in AI, new energy vehicles and industrial automation.