Chrysler PT Cruiser Alternator Problems

hi my pt cruiser will start one day and then not the next,,,sometimes just clicking,,,but will not turn over the engine..it will run ok for a few days then be dead,,i have replaced the battery and also taken it for electical testing and the...

Whilst driving with full lights on, all lights constantly flicker. However at idle the light become stable and constant. The voltage monitored at the accessory is 13.2v to 15.0v. A new battery was fitted approximately 5 months ago.