The answer to 'EV charger installation making buzzing noise' is that a buzzing sound from an EV charger is often caused by a problem with the electrical connection or a malfunctioning component in the charger. This can be due to a loose connection, a faulty circuit, or an issue with the charger's internal wiring or components.
If you hear a buzzing noise from your EV charger, it's important to address the issue promptly to ensure safe and reliable operation. In some cases, the problem may be something you can troubleshoot and fix yourself, but in other cases, it's best to call in a professional electrician to diagnose and repair the issue.