Why does a charger sometimes not start?

A session can stop at five points: the vehicle handshake, the charger hardware, the mobile connection, the backend or the authorisation. Software and configuration faults can often be fixed remotely.

Explained in

EV charging fundamentals · Stop 06Why does a charging session sometimes not start?Five places where a session can stop: vehicle, charger, connectivity, backend and payment. How operators diagnose remotely, and what uptime measures.

A control room sees more than the driver, and checks in a fixed order:

From “How an operator investigates”, stop 06
  1. What does uptime mean?Uptime measures whether a charge point was technically able to charge. Session success measures whether individual sessions started and finished.
  2. Why does charging involve so many companies?Three things spread the work: the grid connection, the location where people park, and contracts that work across many networks. One company can hold several roles, but the roles stay separate.
  3. Who is the CPO and who is the eMSP?The CPO operates the charger and keeps it available. The eMSP issues the card or app, sets the driver's price and sends the invoice. One company can hold both roles.
  4. How many companies operate public chargers?Around 15,500 companies operate public charge points in the directory data. A small number of large networks run most of them, while almost 13,000 run fewer than ten each.