To connect a Sunsynk inverter to WiFi, first ensure compatibility and download the dedicated app if available. Connect your smartphone or device to the inverter's WiFi network using the provided SSID and password. Open the app, select your home WiFi network, enter the password, and confirm the connection. Configure settings like timezone and monitoring preferences through the app. If there's no app, access the inverter's web interface via a browser to set up WiFi. Always follow the manufacturer's instructions, and prioritize network security by using a strong WiFi password.