The present disclosure generally relates to AC power control. More particularly, the present disclosure relates to a system and method for a Grid Tie Inverter (GTI) that provide for improved synchronization with the grid and better anti-islanding protection. In an aspect, the present disclosure provides for a system and method for improved synchronization of a GTI using a modulation method to turn OFF all switches near zero crossing that simplifies grid presence, voltage, frequency, phase detection and estimation, and also improves Phase Locked Loop (PLL) to synchronize the generated voltage with the grid. The system and method of the present disclosure also provides for a modulation method of using 3 switches out of 4 to avoid any reverse current from the grid to the GTI.