• Dagong ESS

BMS in Energy Storage Systems: Types, Features, Cost, and Selection Guide

What is BMS in ESS?

A Battery Management System (BMS) is the “brain” of a lithium battery energy storage system (ESS). It monitors and controls key parameters such as cell voltage, current, temperature, SOC (State of Charge), and SOH (State of Health). A BMS protects the battery from overcharge, over-discharge, overheating, and short circuits, ensuring long-term safety and performance.

Types of BMS

• Centralized BMS – All data collected and controlled in a central unit.

• Distributed BMS – Combines central and local controllers.

• Modular BMS – Scalable design for flexible energy storage configurations.

• Master-Slave BMS – Master unit manages multiple slave controllers in parallel.

Features of BMS

• Real-time monitoring of voltage, current, and temperature

• SOC/SOH estimation

• Cell balancing (passive/active)

• Fault detection and alarm functions

• Communication: CAN, RS485, Modbus, Ethernet

• Data logging and remote diagnostics

Applications of BMS

• Residential ESS: Enhances battery safety and monitoring

• Commercial & Industrial ESS: Enables fault detection, lifespan prediction

• Utility-Scale Systems: Supports thousands of battery cells safely

• Electric Vehicles (EVs): Ensures safe operation under dynamic loads

• Telecom and UPS: Maintains battery backup reliability

Price of BMS

The cost of a BMS varies depending on system voltage, number of battery cells, communication functions, and balancing method:

• Low-voltage BMS (12V–48V): $30–$150

• High-voltage BMS (100V–1500V): $200–$1000+
  Custom protocols, redundancy design, and integration with EMS will increase costs.

How to Select BMS for Your Project?

• Match the voltage and number of cells in your battery pack

• Choose suitable balancing (active for precision, passive for cost-saving)

• Confirm communication compatibility with PCS and EMS

• Evaluate environmental operating range

• Consider certifications: CE, UL, UN38.3

How Long Does BMS Last?

A quality BMS typically lasts 8–15 years, depending on operating conditions and protection grade. Reliable firmware updates and proper thermal management will prolong service life.

The Supplier of BMS

Dagong ESS provides advanced energy storage systems with high-performance BMS solutions. Their systems support centralized and modular BMS architecture, full-cycle protection, and remote fault diagnosis. With global certifications and customizable communication protocols, Dagong ESS ensures seamless integration and safe operation across residential, C&I, and utility-grade applications.

We support OEM/ODM customization and large-scale supply for system integrators and energy solution providers.

Email: sales@dagongess.com
Website: www.dagongess.com