mean time to restore service

Charging station reliability is important, but what does it mean in practice?

As revealed by Elizabeth France in her article, reliability is simple from an EV driver’s perspective –

Does the charging station work when they need it to? 

Key takeaways for sharing:

  • If drivers cannot depend on charging infrastructure, they won’t drive electric.
  • In the EV charging industry, reliability is often measured in terms of uptime.
  • There are different reasons why a charger may not work.
  • Possible key performance indicators:
    • the time needed to detect the service-affecting issue
    • the time needed to escalate the service-affecting issue to the party responsible
    • the time needed for the party responsible to repair/resolve the service affecting issue and restore service (known as mean time to repair or “MTTR”)
    • the time needed to restore service (known as the mean time to restore service or “MTTRS”)
  • For charging equipment in particular, the mean time between failure (known as mean time between failures or “MTBF”) can be considered.
  • All things being equal, a high MTBF should lead to better uptime
  • The metrics for reliability in the EV charging space are not widely known

Read Elizabeth’s article here for more.

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