The market scale for electrical vehicles (EV) is estimated to top US$2.0 trillion, and Taiwan will surely play an important role in the global EV market by 2025 with its production value estimated to reach NT$600 billion (US$18.96 billion), according to John Hsuan, vice honorary chairman of United Microelectronics (UMC) and chairman of Clientron, a specialist in automotive electronic control system integration.