Introduction to the kind of data we need to understand if EV owners feel well served - the key measure of charging where and when they wanted, other surveys to assess views of current and prospective EV owners, up-time data from chargepoint suppliers, local information about particular sites etc.
We have considered various metrics for determining whether a local area has been successful in meeting the needs of local EV users and have settled on this as a useful and practical headline indicator -
'What percentage of the time were you able to charge your EV where and when you needed to over the last [x] weeks?'
This metric allows for the fact that EV users will have their own assessments of convenience which will depend on a range of factors such as their personal mobility and daily routines, and the technical specifications of their particular vehicle.
Where people are able to charge their EVs where and when they need to then they are likely to feel positive about the switch and advocate for others in their area also to move to an EV.
Conversely, where they experience charging as being inconvenient for much of the time then they may discourage others from making the switch by sharing their negative experience.