DIRECTORY / BATTERY & STORAGE
EcoFlow STREAM Ultra X
EcoFlow
Explore EcoFlow STREAM Ultra X specifications, including 3.84kWh LFP storage, four MPPT inputs, 2,000W solar input and AC output.
Full Technical Specifications
Model Number
STREAM Ultra X
Category
Plug-in Solar & Home Storage
Product Type
Battery Chemistry
LFP (LiFePOâ‚„)
Nominal Capacity (kWh)
3.84
Usable Capacity (kWh)
Max Expandable Capacity (kWh)
Expansion Battery Compatibility
Continuous AC Output (W)
1200
Peak AC Output (W)
AC Charging Input (W)
1200
Max Solar Input (W)
2000
MPPT Channels
4
Solar Input Voltage Range (V)
Maximum 60V DC
Grid / AC Charging
Yes — AC charging input specified at 1,200W
AC Output / Backup
1200W AC output; grid-tied output listed as 800W; bypass supports devices up to 2300W (10A)
EPS / UPS
Off-grid use supported; do not describe as UPS without model-specific confirmation
App & Monitoring
EcoFlow app; Wi-Fi/Bluetooth connectivity
Smart Meter
EcoFlow smart meter ecosystem; verify regional accessory compatibility
Plug-in Solar
Designed for EcoFlow STREAM plug-in solar ecosystem
UK Availability
Listed on EcoFlow UK website; availability may vary
Warranty
10 years
Product Overview
3.84kWh LFP battery system with four MPPT inputs and up to 2,000W PV input (500W per MPPT). Manufacturer lists 1,200W AC output, 1,200W AC charging input and 800W grid-tied output. Maximum supported bypass device load is 2,300W (10A).
Additional Notes
Manufacturer specifications. Grid-tied output, standalone AC output and bypass load are different operating figures and should not be conflated. Cycle life: 6,000 cycles to 70% capacity.
Official Manufacturer Sources
https://www.ecoflow.com/uk/series/stream-series
EVIDENCE RATING
High — official manufacturer specifications
RETAILER
LAST VERIFIED
November 8, 2026
November 8, 2026
Plug-in solar battery storage system