The EcoFlow STREAM Ultra X is a hybrid plug-in home battery that lifts the STREAM family to 3.84 kWh in a single 38.8 kg cabinet measuring 42 x 29.4 x 46 cm. It combines a direct PV input capable of 2000 W across up to four 500 W modules, a grid charging path of up to 1200 W and an integrated socket that can supply 1200 W from the battery with an additional 1100 W pass-through, for 2300 W total. Up to six units can be paralleled to reach 23 kWh of storage. All monitoring runs through Wi-Fi and Bluetooth in the EcoFlow app.

• 3840 Wh usable per unit, expandable to 23 040 Wh over six batteries.
• Direct solar input of 2000 W across four PV inputs of 500 W each.
• Integrated socket outputs 1200 W from the battery plus 1100 W pass-through for 2300 W total.
• Grid feed-in of 800 W on a shared circuit or up to 1200 W on a dedicated one.
• Grid charging up to 1200 W keeps day-ahead scheduling with cheap-tariff windows viable.
• IP65 housing, <30 dB acoustic signature and self-heating down to 5 °C for outdoor placement.
• 6000 cycles to 70% capacity and a 10-year warranty back the long-term value case.

Key specs

• Capacity: 3840 Wh (expandable to 23 040 Wh)
• Cycles: 6000 to 70% capacity
• Operating range: -20 to 55 °C
• Acoustic: <30 dB
• IP rating: IP65
• Dimensions: 42 x 29.4 x 46 cm
• Weight: 38.8 kg
• Wi-Fi: yes
• Bluetooth: yes
• Warranty: 10 years

A fit for larger households ready to cover a full-day PV surplus with a single tower, or that want serious daily cycling on dynamic energy tariffs paired with a P1 meter for automatic import and export management.