Study on BESS failures: analysis of failure root
In aggregating why battery systems have failed in the past in an easily accessible format, the report will help guide efforts to mitigate storage
BESS Failure Incident Database. This was formerly known as the BESS Failure Event Database. It has been renamed to the BESS Failure Incident Database to align with language used by the emergency response community.
This report relies on data from EPRI's BESS Failure Incident Database along with findings from incident reports and root case analyses and expert interviews conducted by the authors to build robust descriptions of each event.
Note that the Stationary Energy Storage Failure Incidents table tracks both utility-scale and C&I system failures. It is instructive to compare the number of failure incidents over time against the deployment of BESS. The graph to the right looks at the failure rate per cumulative deployed capacity, up to 12/31/2024.
Root Cause of Failure: Design, manufacturing, integration/assembly/construction, or operation. Affected BESS Element: Cell/module, controls, or balance of the system. The study analyzes the proportion of failures associated with each root cause and BESS element, the relationship between the two, and trends in failure types and rates over time.
PDF version includes complete article with source references. Suitable for printing and offline reading.
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