This document studies the technical parameters of a grid-connected photovoltaic (PV) system. It models the various components of the PV system, including the PV array, maximum power point tracking, DC-DC converter, inverter, and inverter controller. It also models an islanding scenario where the PV system continues supplying local loads after disconnecting from the grid. Simulation results show that under islanding, the voltage and frequency waveforms vary depending on whether PV generation is less than, greater than, or equal to the local load. When PV power is greater or less than load power, voltage sags or swells and frequency increases linearly after islanding occurs. With equivalent PV and load power, voltage and frequency remain