The Tesla Supercharging community maintained its near-perfect reliability in 2022, in response to Tesla’s most up-to-date 2022 Affect Report.

The corporate says that the typical uptime of Supercharger websites final yr amounted to 99.95 p.c (down marginally from 99.96 p.c in 2021), however was larger than in 2018-2020.

That is sounds superior and Tesla entitled this a part of its presentation “Chargers that simply work.”

Nonetheless, the hot button is the methodology. Tesla defines the uptime of Supercharger websites as the typical share of websites globally that had not less than 50 p.c day by day capability purposeful for the yr:

*Uptime of Supercharger websites displays the typical share of websites globally that had not less than 50% of their day by day capability purposeful for the yr.

In different phrases, in 2022, on common, 99.95% of the stations had not less than 50 p.c day by day capability (stalls, as we perceive) totally purposeful for the yr.

Common uptime of Supercharger websites*:

• 2018: 99.94%
• 2019: 99.90%
• 2020: 99.74%
• 2021: 99.86%
• 2022: 99.95%

Properly, we now have all heard many instances that the Tesla Supercharging community is without doubt one of the most dependable (if not probably the most dependable) fast-charging networks for all-electric automobiles, however this metric is a bit bit controversial.

That is as a result of if (in idea), as much as 49.9 p.c of the stalls at every station have been lifeless for the entire yr, and the remaining 51.1 p.c could be up for the entire yr, then the equation would return a results of an ideal one hundred pc reliability.

Moreover, such a easy presentation does not likely provides us an outlook into what number of stations/stalls may be defective.

We will do some math to estimate the reliability. For instance, assuming 5,000 stations around the globe (Tesla was fairly near that quantity as of the top of Q1 2023) one station offline for your complete yr would lead to 99.98 p.c reliability. Three down for your complete yr could be 99.94 p.c dependable.

If we moreover assume that as an alternative of three explicit stations down for the entire yr, there are three completely different stations down on daily basis, then we should multiply it by 365. That is 1,095 stations on common, which had someday in a yr with lower than 50 p.c (0-49.9 p.c) day by day capability purposeful.

That is nonetheless an ideal end result as a result of we’re speaking solely about someday with lower than 50 p.c day by day capability at roughly one-fifth of the stations. Some stalls may be nonetheless out there at these websites, whereas the remainder of the stations could be working at greater than 50 p.c capability.

Instance for 99.94 reliability and 5,000 stations:

• three stations offline (beneath 50% day by day capability) for your complete yr
  4,997 stations: not less than 50% day by day capability on daily basis
• 1,095 stations that have been offline (beneath 50% day by day capability) someday in a yr
  3,905 stations: not less than 50% day by day capability on daily basis

Different parts (like energy output) and even the supply of points (they may be exterior) weren’t mentioned.

It will likely be very attention-grabbing to see whether or not Tesla will have the ability to preserve a excessive uptime ratio sooner or later, contemplating the continuing enlargement of the community, and growing complexity because of the addition of the non-Tesla Supercharging pilot (varied EVs, app for non-Tesla automobiles, built-in CCS1 adapter in North America) and the next utilization (extra Tesla EVs per station/stall and extra non-Tesla EVs).