DELTA 3 Ultra Plus + DELTA 3 Max Plus Smart Extra Battery- Flash Sale1. Smart Output Priority: Choose which circuits stay powered via the app. Prioritize what matters and extend runtime when it counts most. 2. 3 11kWh Expandable Capacity: Easily scale up, and can achieve longer runtime with an EcoFlow Smart Generator featuring automatic start and stop. 3. 6 Ways to charge, Ready in Just 48 Mins: Ready in Just 48 Mins (0 80%) with Solar + Generator Dual Charging 4. 3600W Powerful Output: 7200W surge output. With X Boost