The answer to 'why is my EV charger' is that there could be several common causes, such as a tripped circuit breaker, a faulty electrical connection, or a problem with the charger itself. Symptoms may include the charger not powering on, slow or inconsistent charging, or error messages on the charger display.
If the circuit breaker has tripped, try resetting it. If that doesn't work, check the electrical connections to the charger for any loose wires or damage. You may be able to tighten connections or replace a faulty cable yourself, but if you're not comfortable working with electricity, it's best to call a licensed electrician.