EcoFlow STREAM ULTRA X

  
By EcoFlow
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EcoFlow STREAM Ultra X

Ready for true energy freedom? Power your home, reduce your bills, and take control with the STREAM Ultra X - a part of the EcoFlow STREAM plug-and-play solar system.

EcoFlow STREAM Ultra Product Image

Key Features

  • STREAM Ultra X: 3.84kWh battery
  • Expandable capacity up to 11.52kWh
  • 2,000W PV input (4 × 500W), with 4 MPPT controllers
  • Max device power supported: 2,300W (10A)
  • 1200W AC output
  • Low-temperature self-heating below 5 deg C, ready for winter conditions
  • Quiet operation (<30 dB) and IP65 weatherproofing for outdoor use
  • 10-year warranty - designed to retain 70% of the original battery capacity after 6,000 full charge/discharge cycles
  • Requires installation by a licensed electrician. Contact us today for a referral to a trusted installation partner. 
EcoFlow STREAM Ultra Product Image

Power Big. Power Small. Power It All.

Three smart setups to cover every need — all powered by the sun.

2300W Parallel Mode

Device Setup: 1 × STREAM Ultra X + 1 × STREAM Ultra or STREAM AC Pro (connected with parallel cable)

Powers high-wattage appliances like ovens and dishwashers.

Output: 1,200W + 1,100W = 2,300W total

2000W Distributed Mode

Device Setup: 1 × STREAM Ultra X + 1 × STREAM Ultra or STREAM AC Pro (plugged into separate wall sockets)

Solar powers up to 2,000W, with support for 2,300W when needed.

Output: 1,200W + 800W + 300W = 2,300W total

1200W Single Unit Mode

Device Setup: 1 × STREAM Ultra X

Ideal for running everyday essentials like TVs, cookers, and fans.

Output: 1,200W from a single battery

Technical Specifications

Capacity 3.84kWh
Cycle Life 6,000 cycles to 70% capacity
AC Charging Input 1,200W
AC Output 1,200W
MPPT 4
PV Input Power 2,000W (500W × 4)
AC Output (Grid-Tied) 800W
Max Device Power Supported 2,300W (10A)
Battery Self-Heating Activates at ≤5°C
Ingress Protection IP65 (weatherproof)
Dimensions 420mm x 294mm x 460mm
Weight 38.8 kg
Operating Temperature -20°C to 55°C
Connectivity Wi-Fi / Bluetooth (EcoFlow App)
Noise Level <30 dB
Warranty 10 Years

How to connect the STREAM Power Plant to the Home Electrical Wiring

To comply with UK wiring regulations, the BKW-AC cable (which connects the inverter output to the home 230V wiring) must be connected to a fused spur - the white box shown to the right of the sockets in the photo below. Inside this box, the cable should pass through a 13A fuse and switch before being connected to one of the home circuits. In the photo, it is connected to the same circuit that powers the adjacent socket, but the installation does not need to be next to a socket. A blank plate can also be used to replace an existing socket.

The installer should add a warning label to the wire and the fuse board, see the images. Suggested warnings are:

For the cable:
WARNING: SOURCE OF POWER. DISCONNECT IF YOU NEED TO DE-ENERGISE THIS CIRCUIT

For the main board:
TO DE-ENERGISE THIS CIRCUIT, SWITCH OFF THE FUSED SPUR CONNECTED TO ECOFLOW STREAM

Important notice: Under new guidance, in the UK energy storage systems should not be installed in bedrooms and other residential spaces. They are best installed outside - the STREAM batteries are IP65 rated for this purpose - or in a non-habitation space meting prescribed conditions. The person installing must follow the guidance here.