You really don't. You just need to pace the installs to EV vehicle uptake (which you can monitor with vehicle registrations and the addresses vehicles are registered at). Install where cars are being bought and garaged (or in this case, street parked).
Laws are already on the books that penalize non-EVs for parking in EV charging spaces. My statement assumes you'd overbuild in order to ensure spots (one EV in neighborhood? build capacity for 3 to charge).
Street parking spaces aren’t reserved for individuals. Anyone else with an EV (visitor? neighbor who just bought one?) is equally entitled to those spots. You would own a car rather than rent or take public transit (esp. in an urban area) because you need it to be available and working every time, not just under ideal circumstances. Gambling your work attendance on getting a particular street parking spot the night before isn’t smart.
There's a couple of spots by a charger in a plaza where I often go, posted as "reserved for hybrid/electric". Well, they didn't make it explicit enough, because someone with a non-plugin hybrid was using one of them, the last time I was there. It would suck if I had an electric car and someone like that was blocking me.
