What is SOH?

State of Health (SOH) is a vital metric in battery energy storage systems, representing the current performance and capacity of a battery relative to its original condition. Expressed as a percentage, SOH provides a clear indication of battery aging. For example, a battery with 90% SOH retains 90% of the capacity and power it delivered when new.

SOH reflects how much a battery has degraded over time due to charging cycles, operating temperatures, and usage patterns. This parameter is essential for ensuring system reliability, enabling proactive maintenance, and supporting lifecycle decisions in energy storage applications.

Types of SOH Assessment Methods

• Capacity Fade Monitoring: Tracks energy capacity loss over time.

• Internal Resistance Analysis: Higher resistance may indicate aging or defects.

• Electrochemical Impedance Spectroscopy (EIS): Measures internal battery parameters non-invasively.

• AI Algorithms & Machine Learning: Use data trends to predict battery health.

• Battery Management System (BMS) Integration: Combines real-time data with historical usage to enhance accuracy.

Key Features of SOH Monitoring in Dagong ESS Solutions

Dagong ESS integrates intelligent SOH diagnostics across its entire product range. Our systems are designed to ensure accurate, real-time health assessments and long-term reliability.

• Real-Time Monitoring: Dynamic tracking of temperature, capacity, and resistance.

• Data Visualization: User-friendly dashboards on both web and mobile platforms.

• Predictive Maintenance: Identify battery degradation before failure occurs.

• Enhanced Safety: Prevent usage of aging or unstable battery cells.

• Chemistry Compatibility: Supports multiple battery types with customizable SOH parameters.

Applications of SOH in Energy Storage

SOH monitoring is crucial in a range of applications, especially where reliability, performance, and cost optimization are key:

• C&I Energy Storage: Ensures minimal downtime by enabling predictive maintenance.

• Grid-Tied Systems: Helps determine the system's ability to support peak load demands.

• Battery Leasing and Second-Life Use: Evaluates the remaining value of used batteries for reuse, reducing costs and environmental impact.

Price of SOH-Enabled ESS Systems

The cost of an energy storage system with integrated SOH monitoring varies depending on project size, battery type, monitoring depth, and customization level. Pricing is usually based on EXW, FOB, or CIF terms. For detailed quotations, please contact Dagong ESS at sales@dagongess.com.

How to Select an ESS with Advanced SOH Capabilities?

When selecting a system, consider:

• Desired depth of SOH diagnostics

• Environmental conditions of deployment

• Integration with existing monitoring systems

• Project scale and expected lifecycle
  Dagong ESS offers both off-the-shelf and customizable SOH solutions to suit various industrial, commercial, and residential needs.

How Long Do Batteries with SOH Monitoring Last?

SOH monitoring doesn’t extend battery life directly, but it enables smarter operation and timely interventions. With SOH-guided usage, batteries can maintain high performance for 8–15 years depending on usage and maintenance.

Dagong ESS Product Portfolio with SOH Integration

• Home ESS (5kWh–80kWh)
  Optimized for household solar storage, with continuous SOH tracking to protect long-term investment.

•  Rack-Mounted ESS (30kWh–80kWh)
  Modular commercial solution with per-module SOH analysis, ideal for flexible installations.

•  Air-Cooled C&I Cabinet (100kWh–215kWh)
  Industrial-grade ESS with SOH diagnostics and early warning alerts for degradation.

• Liquid-Cooled ESS Cabinet (100kWh–372kWh)
  Enhanced thermal management preserves SOH even under heavy cycling conditions.

•  Containerized ESS Solutions (Customized)
  Utility-scale systems with centralized SOH monitoring, perfect for benchmarking and grid-scale asset management.

Frequently Asked Questions

Q1: What exactly does SOH measure?
A: SOH shows how much the battery’s capacity and performance have declined compared to its original state.

Q2: Is SOH data updated in real time?
A: Yes. In Dagong ESS systems, SOH is continuously updated using real-time BMS data and AI algorithms.

Q3: Can users view SOH data directly?
A: Absolutely. SOH data is visible on our intuitive web dashboard and mobile interface.

Q4: When is a battery considered at end-of-life based on SOH?
A: Generally, when SOH drops below 70–80%, the battery is considered no longer suitable for its primary use.

Q5: Does Dagong ESS support SOH evaluation for second-life applications?
A: Yes, our platform helps assess whether retired batteries can be reused in less demanding scenarios.

The Supplier of SOH-Based Energy Storage Systems

Dagong ESS specializes in high-performance energy storage systems with built-in SOH diagnostics. With decades of expertise and a commitment to innovation, Dagong ESS empowers customers worldwide with smart, safe, and sustainable storage solutions.

📧 Contact us at: sales@dagongess.com
🌐 Website: www.dagongess.com