The answer to 'why is my electrical panel flickering lights' is that it is likely due to a loose connection or a problem with the electrical panel itself. Flickering lights can be a sign of an issue with the electrical system, such as a loose wire, a failing circuit breaker, or a problem with the main service panel.
Some common causes of flickering lights include loose connections in the electrical panel, a problem with the main service line coming into the home, or issues with the electrical grid in your area. In some cases, flickering lights can also be caused by a problem with a specific appliance or light fixture that is connected to the electrical panel.