The answer to 'do I need electrical panel' is that most homes do need an electrical panel, also called a breaker box or service panel. The electrical panel is the central hub that distributes electricity throughout your home and contains the circuit breakers that protect your electrical system from overloads and short circuits. Without a properly functioning electrical panel, your home would not have reliable and safe electrical power.
Electrical panels are required by building codes and need to be installed by a licensed electrician. They are typically located in a utility room, basement, or garage, and contain a main breaker that controls the overall power supply as well as individual circuit breakers for each electrical circuit in your home. The panel allows you to turn the power on and off, reset tripped breakers, and expand your electrical capacity as needed.