Smart inverters are advanced power electronic devices that convert direct current (DC) from renewable energy sources, like solar panels, into alternating current (AC) for use in the electrical grid. They not only perform this conversion but also enhance the reliability and efficiency of energy distribution by providing grid support functions such as voltage regulation, frequency control, and communication with the grid operators. By enabling a more responsive integration of renewable energy, smart inverters play a crucial role in optimizing energy efficiency in buildings.