Common Problems with BESS Energy Storage Systems

Battery Energy Storage Systems (BESS) face challenges in performance, safety, degradation, and system integration that can impact reliability and operational efficiency.

Performance and Operational Issues

BESS often encounter performance and availability challenges, with 58% of industry professionals citing these as their top concern. Technical issues interrupting day-to-day operations are common, with nearly half of respondents experiencing problems at least once a month. Data management and integration are also significant concerns, affecting over a third of operators, while degradation and lifetime management are reported by 31% of professionals. Operations and maintenance teams face frequent technical hurdles, highlighting the need for robust monitoring and management systems .

Safety and Fire Risks

Thermal management and fire hazards are critical issues in BESS. Lithium-ion battery fires are difficult to extinguish and may reignite hours or days later, releasing harmful gases that pose health risks to nearby communities and first responders. Cooling system failures, electrical shorts, or water ingress can trigger thermal runaway, as seen in incidents like the Victorian Big Battery fire in Australia and the Warwick, New York fire . Proper design, installation, and emergency response planning are essential to mitigate these risks.

Manufacturing and System-Level Defects

Quality audits reveal that system-level defects account for the majority of manufacturing issues, with 72% of defects identified in 2024 occurring at the system rather than cell level. These defects can include improper assembly, faulty integration of modules, or inadequate control systems, which may lead to operational failures or safety incidents . Design and implementation details, rather than individual cell faults, are often the root cause of failures .

Degradation and Lifetime Management

Battery degradation over time affects capacity, efficiency, and overall system lifespan. Operators must manage cell aging, thermal stress, and cycling effects to maintain performance. Inadequate monitoring or predictive maintenance can accelerate degradation, reducing the return on investment and reliability of the BESS .

Environmental and External Factors

External conditions such as humidity, temperature fluctuations, and water ingress can compromise BESS safety and functionality. Electrical shorts or arcing caused by environmental exposure have been linked to several high-profile fires, emphasizing the importance of protective enclosures and environmental controls .

Summary

The most common problems in BESS include:

• Performance and availability issues disrupting operations
• Thermal management and fire risks from lithium-ion batteries
• System-level manufacturing defects affecting reliability
• Degradation and lifetime management challenges
• Environmental vulnerabilities such as water ingress or temperature extremes Addressing these issues requires careful design, rigorous quality control, robust monitoring, and proactive maintenance strategies to ensure safe and reliable BESS operation .