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Hybrid co-locatedUnited StatesEIR-0679

Battery storage failure reported at solar integration site in Flagstaff, Arizona

Nov 2012Published 11 Sept 2026Responsible editor: Chief Editor

SignificantOtherProvisional0.5 MW
Estimated damageEstimated by the register's adjusterHow? Know the real figure?
Figure hidden: shown to subscribersMedium confidence
out of service for about •• daysShown in the record →Full estimate
From the recordRoot cause hidden
Where
Flagstaff, Arizona, United States on 26 November 2012
What
failure at battery energy storage system
What
0.5 MW and 1.5 MWh system integrated by Electrovaya
What
system was approximately 1.5 years old

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

What happened

On 26 November 2012 a failure was recorded at a battery energy storage system integrated with a solar installation in Flagstaff, Arizona, United States. The system, rated at 0.5 MW and 1.5 MWh, was approximately 1.5 years old at the time of the event. The system was integrated by Electrovaya as part of a solar integration application. The source consulted for this entry is a database record listing the location, date, capacity, system age and integrator, but it does not describe the nature of the failure, its cause, any injuries, emergency response, or the extent of damage or downtime. No further detail on the sequence of events is available from the material reviewed.

Lessons learned

  1. Battery storage systems in solar hybrids can fail in the first two years of service, so operators should increase monitoring and checks during early operation.
  2. Integrators of battery storage must keep full public records of failures, because incomplete data blocks shared learning on root causes.

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

Not yet known

  • Nature of the failure
  • Cause of the failure
  • Any injuries or response
  • Extent of damage or downtime

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

Source

epri.box.com

Published 2026-09-11. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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