[vegardx]

They don't even seem to specify what kind of charger they've tested. But I wouldn't be surprised if they found that a quarter of public L2-chargers were out of service. They have tons of failure points and usually very little internal logic to self-report.

Some of the early fast chargers (outside of Tesla) were notoriously bad, and a lot of them are still around, for better or worse. Many of the early AC and DC chargers were also without any kind of connectivity, making it hard to properly manage them. In the early days even some of the fast chargers at gas station weren't really network connected, and if they were it was poorly implemented. Not that different from pumps at the forecourt.