Schematic Diagram of the Operating Principle of a 4 kW Residential Grid-Tied PV Storage System

This 4kW residential hybrid grid-connected photovoltaic energy storage system consists of four 650W solar panels, a 4kW inverter, and a 5kWh battery. It connects to the utility grid and powers household appliances, generating electricity during the day and automatically supplementing power at night or during power outages to ensure a stable power supply.