Battery storage failure at Edwards Sanborn E2 in Kern County, California

2024Published 7 Sept 2026Responsible editor: Chief Editor

MinorThermal / fireProvisional66 MW

Estimated damageEstimated by the register's adjusterHow? Know the real figure?

out of service for about •• daysShown in the record →Full estimate

From the recordRoot cause Asset years old

Where: Edwards Sanborn E2 site in Kern County, California
Operator: Terra-Gen
What: Lithium-ion battery energy storage system failure
Cause: Not reported
Outcome: Very small proportion of capacity affected

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Companies named in the reporting of this entry (being named is not a finding of fault): Terra-Gen

What happened

A lithium-ion battery energy storage system at the Edwards Sanborn E2 site in Kern County, California, operated by Terra-Gen, experienced a failure incident in February 2024, according to an industry database that tracks stationary battery storage failures. The system was rated at 66 MW and 140 MWh and was approximately 2.2 years old at the time of the incident. The proportion of the installation affected was very small, reported as a fraction of a percent of total capacity.

No further public detail is available on the specific trigger, fire or thermal event characteristics, emergency response, injuries or evacuation status. The incident was logged in a database that focuses on failures with potential wider public health and safety impact, most commonly thermal events such as fire or explosion in lithium-ion systems.

Contributing factors

Not reported in the available sources.

Lessons learned

A lithium-ion battery energy storage system can fail within the first few years, so operators should keep monitoring after commissioning.
Even a failure that affects only a fraction of a percent of capacity belongs in public databases to show true failure rates.

More lessons on detection and monitoring, emergency response and public communication, from every incident on the register.

Not yet known

Specific trigger or cause
Equipment model and age details
Emergency response and injuries
Downtime or repair cost

This entry is updated when these are reported. Get an alert for the next one like it.

Source

mbrweb.ferc.gov

Published 2026-09-07. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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Chart to reuse with this story: Battery storage incidents in the United States, by year, free with a credit (PNG).

The record behind this entry

The record behind EIR-0128 holds the site, the operator, the owner, the capacity, the root cause and the age at the incident as fields you can filter, count and export, with its 4 sources and their verification status. Companies are named in the roles the sources give them. Being named is not a finding of fault.

Site: ••••••••••••
Operator: •••••••••
Owner: •••••••••
Capacity: •••••
Root cause: ••••••••••••••••
Age at incident: •••
Sources: ••••••••••••••

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Battery storage incidents in the United States: 49 entries, with a free alert for the next one.

Battery storage fires: the counts, the latest entries and a free alert for the next one. Also: battery storage explosions.

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