The company says it's investing €300 million at its sites in Grange Castle, Newbridge and Ringaskiddy.
The 300 new manufacturing and lab roles will be filled over the next two or three years.
The company already employs around 4,000 people at six locations around Ireland.
Tesla Opens Wicklow Supercharger Station Adding Eight High-Speed Stalls
Almost a Third of Road Deaths Involve Young Drivers, Wicklow Gardaí Warn Ahead Of Bank Holiday
Garden County Housing Figures Buck National Trends
Outpouring Of Love And Tributes to Musician Glen Hansard
Wicklow Beaches To Host Kids Sea Safari Workshops In August