EcoFlow STREAM Ultra 1.92kWh Balcony Power Plant

EF ECOFLOW: EcoFlow STREAM Ultra is a home-focused balcony power plant with battery storage, described as supporting solar input, AC output and capacity expansion. The listing also promotes app-based energy management, but several power figures in the listing are not consistent with one another.

At a glance

Advertised storage capacity starts at 1.92kWh, the listing says it can expand from 1.92kWh to 11.52kWh by connecting up to 6 units.
The listing describes 2800W solar input with four MPPT channels and dual AC ports.
AC coupling is claimed to let stored solar energy power household appliances indoors.
An app is described as using electricity prices, household usage and device status to schedule energy use.

Price

£679.00Save 15%

Reference price: ~~£799.00~~

Price checked: 12 Nov 2026

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Often bought together

EcoFlow x Shelly Smart Meter - Smart Energy Monitoring for Whole Homes - Using Household Current Compensation - Maximizing Energy Utilization

£149.00

Pros and cons

Pros

The stated 1.92kWh starting capacity and claimed expansion to 11.52kWh offer a clear route to adding storage over time.
Four MPPT channels are claimed for solar input, which may be useful when connecting multiple solar inputs.
The claimed indoor AC-coupled operation supports using stored solar energy for household appliances without requiring the unit to be placed outdoors.

Technical specifications

8 specifications

Identity
Brand	EF ECOFLOW
Model	STREAM Ultra

Power and use
Wattage	2300 watts
Output wattage	2300 Watts
Maximum engine power	2800 Watts
Fuel type	Solar
Recommended use	Home
Total power outlets	2

What to know before buying

Listing details to confirm

Listing details are contradictory or inconsistent: the title gives 1.92kWh storage, feature text says expansion to 11.52kWh, a separate highlight claims expansion to 21kWh, and stated output figures include 2300W, 2800W, 1200W and 600/800W micro-inverter ratings, the exact configuration, port output and expansion limit are therefore unconfirmed. Confirm the selected listing's ratings and included equipment before planning a system.

What’s in the box

Included

Stream Ultra

Who is it for?

A good fit for

Households seeking a solar-storage system for balcony or home use, provided the advertised output and system limits match their requirements.
Buyers interested in app-managed use of stored solar energy and possible expansion of storage capacity.

Less suited to

Buyers who need a confirmed, single AC-output rating or a guaranteed expansion ceiling before choosing a system.
Buyers expecting solar panels or additional storage units to be included, the supplied contents list names only the Stream Ultra.

EcoFlow STREAM Ultra 1.92kWh Balcony Power Plant · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 114 ratings

5 stars67%67%
4 stars10%10%
3 stars4%4%
2 stars8%8%
1 star11%11%

The available aggregate rating is 4.1 out of 5 from 114 ratings, with 67% at five stars and 11% at one star. That spread suggests ratings are not uniformly positive, but without written feedback the reasons and product-specific strengths or problems cannot be determined. For a system whose listed power and expansion figures conflict, the rating alone cannot confirm suitability for a particular household setup.

Frequently asked questions

What storage capacity is advertised?

The title identifies the product as 1.92kWh. Feature text says it expands from 1.92kWh to 11.52kWh, while another highlight claims expansion to 21kWh, so the applicable limit needs confirmation.

What is the stated AC output?

The listing gives several different figures, including 2300W, 2800W, 1200W and 600/800W for a micro-inverter. These are not reconciled in the supplied details, confirm the exact output for the selected configuration.

Are solar panels included?

The explicit included-components entry names only Stream Ultra. No solar panels are listed as included.

Does it support app-based energy management?

The feature text describes an app that analyses electricity pricing, household energy habits and device status to manage time-of-use strategies, this is a manufacturer claim.