The answer to 'EV charger installation making buzzing noise' is that a buzzing or humming sound from an EV charger is typically caused by a wiring or electrical issue. This could be due to a loose connection, improper grounding, or a problem with the electrical panel or circuit the charger is connected to.
The buzzing noise may also be caused by electrical interference or a faulty component within the charger itself. It's important to address the issue promptly, as a persistent buzzing sound could indicate a more serious problem that could pose a safety risk or prevent the charger from functioning properly.