Starts intermittently

This started suddenly, out of the blue: starts intermittently, but most of the time when turn the key to start the car the panel goes out, no lights. Can be jump started, car will run and drive fine once started, except for intermittent power drops for a split second with climate control and radio restarting and brief flash of battery light. Interior lights flicker for a while when car off and door is open then either go out or come on, sometimes faded. Fuel cut-off switch in trunk clicks repeatedly when car is off for a while then stops. Battery and its connections are good. New generator. Checked all visible wiring no sign of damage.