Explain before you sell
Charging on a household socket is slow, and can overheat wiring that was not designed for it. A short video explaining it simply, with a qualified electrician on camera, creates demand among people who hadn't thought about it.
Your qualifications are an argument worth showing: a dedicated charger has to be installed by a qualified installer.
Find the right owners
On Meta, you target homeowners in your area, with a video about their situation: the new car, the garage, the electricity bill. For apartment buildings, the message changes: you speak to the residents' board.
Capture those who search
"EV charger installation" plus a town name: these searches land on Google, often right after the car is bought. A local campaign on those keywords captures them. I run Google and Meta, and we compare what a signed installation costs in each case.