Study on DCFC reliability/availability

[porsche_coyote]

This study was just published this morning, examining the reliability and availability of CCS chargers in 9 SF Bay Area counties. I was one of the lucky victims who helped collect data for the study, but the results are interesting and I'm sharing since others might care.

The groups funding this study are trying to push for EVSE performance standards being a condition of receiving funding from the recent US Federal infrastructure bill. The EV charging companies are fighting against such a requirement, and have cited their incredible (I mean that in a couple of senses of the word) uptime. This study was specifically designed to look at something other than 'uptime,' specifically how often users are successful in initiating a charge.

https://arxiv.org/pdf/2203.16372.pdf

For those who don't want to read: the overall failure rate for charging was 22.7%. The most reliable network tested was Electrify America, the least reliable was ChargePoint. All were not great.

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[porsche_coyote]

Also, a related WIRED Magazine article:

https://www.wired.com/story/ev-charger-broken-us-electric-cars/

 

[daveo4EV]

that's awesome - we need this data.

 

[gnop1950]

Thanks for the link. 90%+ of my charging is currently at home, but I do plan on taking some longer road trips later this year. The cable too short for the Chevy Bolt is something I find I can live with

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