The answer to 'why is my EV charger buzzing noise' is that a buzzing or humming noise from an EV charger is usually caused by a minor electrical issue. This could be due to a loose connection, a problem with the charging unit's internal components, or interference from nearby electrical devices.
The buzzing noise is typically not a serious problem, but it's important to address it promptly to ensure the safe and efficient operation of your EV charger. If the noise is accompanied by other symptoms like flickering lights, intermittent charging, or tripped circuit breakers, it's best to have a licensed electrician inspect the charger and electrical system.