The EcoFlow DELTA Pro Ultra X Smart Extra Battery is an expansion battery designed to increase the capacity of the DELTA Pro Ultra X system by an additional 6,144Wh. It connects in a plug-and-play setup with no tools required and can be monitored and controlled through the EcoFlow app. Built with EV-grade LFP cells and dual BMS protection, it’s engineered for high safety and long-term durability. This battery is intended for scalable whole-home backup and extended runtime applications.








