Energy Storage System Backup Power: Providing Reliable Power for Your Energy Storage Project

I. Why Do Energy Storage Systems Require Specialized Auxiliary Power Supplies?

The auxiliary power supply in an energy storage system draws power from the DC bus, for example a 1000 VDC system, and provides low-voltage DC outputs such as 5V, 12V, 24V and 48V to auxiliary components like control chips, displays, and cooling fans. This application imposes several rigorous requirements on the power supply.

Wide input voltage range – Energy storage systems operate across a broad voltage range. The auxiliary power supply must accept wide inputs like 88-264 VAC or 120-370 VDC.

High reliability – A failure in the auxiliary power supply would directly cause the BMS (Battery Management System) and EMS (Energy Management System) to lose control, compromising the safe operation of the entire energy storage system.

Comprehensive protection features – The supply must include protections against short circuits, overloads, overvoltage, and battery reverse polarity.

High efficiency and low loss – Efficiency exceeding 90 percent effectively reduces heat generation and energy loss within the system.

Long‑term online float charging – The auxiliary power supply must support long‑term online float charging for backup batteries, ensuring high charging efficiency and the ability to charge batteries to over 90 percent of their capacity.

Leyu possesses a deep understanding of the unique demands of energy storage applications. Our products are manufactured in strict accordance with national standards, ensuring stable performance and reliable quality.

II. LEYU Auxiliary Power Supply Product Series – Tailor‑Made for Energy Storage Systems

LEYU Electric is a specialized high‑tech enterprise integrating R&D, production, sales, and technical services. We primarily manufacture switching power supplies and inverters. Established in 2005, the company employs over 70 production staff and utilizes largely automated manufacturing processes, ensuring robust production capacity and rapid delivery. Our products are exported to more than 50 countries and regions across Southeast Asia, the Middle East, the Americas, Africa, and Europe.

To meet the auxiliary power supply requirements of energy storage systems, LEYU offers the following core product series:

SCP Series – Switching Power Supplies with UPS Function

The SCP series integrates battery backup functionality and is designed specifically for energy storage control equipment requiring an uninterruptible power supply. It features short‑circuit, overload, and over‑voltage protection, as well as battery polarity protection via fuse, and includes LED indicators for real‑time power status monitoring. Typical models include the SCP‑75‑12 (13.8V/5.4A) and SCP‑120‑24 (27.6V/4A).

AD Series – Dual‑Output Uninterruptible Power Supplies with Battery Backup

The AD series supports dual‑channel output and operates across a wide input voltage range of 88‑264 VAC or 124‑370 VDC. Taking the AD‑155B as an example, it delivers 24V/5.5A output with 84 percent efficiency and holds CE, FCC, and RoHS certifications. It is suitable for energy storage control cabinet applications requiring both 12V and 24V power supplies.

NES Series – Single‑Output Switching Power Supplies

The NES series utilizes Pulse Width Modulation (PWM) technology, accepts an input voltage of 85‑264V, and offers output power ranging from 35W to 75W with various output voltages such as 5V, 12V, and 24V. It is suitable for powering various low‑power auxiliary devices within energy storage systems.

SCN Series – High‑Power Switching Power Supplies

The SCN series delivers high power output up to 1200W, with an input range of 85‑264V, adjustable output voltages from 5V to 48V, and output currents reaching up to 180A. It supports parallel operation to meet the power requirements of high‑power auxiliary loads in energy storage systems.

LRS Series – Compact Switching Power Supplies

The LRS series features a compact, lightweight design and universal input capabilities, offering output voltages of 12V, 24V, 36V, and 48V. It is ideal for energy storage system applications with strict installation space constraints.

III.Purchasing Guide – Why Choose Leyu?

Nearly 20 Years of Expertise – Established in 2005, specializing in switching power supplies and inverters.

ISO Quality Management System – Factory adheres to ISO quality standards; products undergo rigorous testing.

Comprehensive International Certifications – CE, RoHS, and CCC certified; compliant with international standards.

Global Service Network – Products exported to over 50 countries; multilingual technical support provided.

OEM/ODM Capabilities – Full customization, design customization, and sample customization services available.

Rapid Delivery – Automated production lines ensuring fast delivery.

Next Steps

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