This is an E-Sun brand 6.2KW or 10.2KW hybrid solar inverter.Battery-Free Operation: This inverter is designed to run directly from solar panels without needing a connected battery, which helps reduce initial investment costs.WiFi Monitoring: It features built-in WiFi functionality, allowing you to monitor system performance through a smartphone app.High Efficiency: The unit offers high inverter efficiency, rated around 99%, and includes a built-in MPPT solar charge controller.