Its kind or too few of its facts are known yet, so it is not in our ranking.
On 4 November 2026 the lowest price for the EcoFlow STREAM Ultra X is 899 € at EcoFlow (brand store), delivery to Germany included.
All prices include VAT and delivery to Germany. We may earn a commission when you buy through these links. It never changes our ranking.
At the same price, a shop in your own country comes first, then a shop selling its own stock before a marketplace seller, then the shorter delivery time, then free returns and the longer return window. Commission never counts.
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The numbers that matter first, then every fact by group. As published by the maker or the shop we read it from.
EcoFlow · on the market since August 2025
Source: derived, no source of its own · checked on 2 Nov
How the battery connects to your home: to a socket, to a balcony solar system, through a hybrid inverter, on the AC side of an installed system, as a module for an inverter, or as a portable power station.
3.8 kWh on this model
Lowest
1 kWh Highest
8 kWh Middle
2.4 kWh
Higher than 23 of the 34 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The cells’ full capacity, before the reserve the battery keeps. The usable capacity is the figure to compare.
23 kWh on this model
Lowest
6.7 kWh Highest
42 kWh Middle
11.5 kWh
Higher than 29 of the 34 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How far the system grows with extra batteries, in usable capacity.
4 on this model
Lowest
1 Highest
6 Middle
5
Lower than 26 of the 37 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How many battery units one system takes.
Source: de.ecoflow.com · checked on 2 Nov
The extra battery the maker sells to add capacity.
800 W on this model
Lowest
800 W Highest
6,900 W Middle
1,200 W
Lower than 20 of the 36 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The most power the battery delivers to your home without a break, as the maker states it.
800 W on this model
Lowest
200 W Highest
800 W Middle
800 W
Higher than 3 of the 26 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The output the battery is set to when it arrives, which can be lower than its maximum.
1,200 W on this model
Lowest
800 W Highest
4,000 W Middle
2,050 W
Lower than 17 of the 30 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How fast the battery charges from the grid.
2,300 W on this model
Lowest
2,000 W Highest
3,600 W Middle
2,300 W
Lower than 4 of the 13 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The power passed straight through to the socket on the battery, such as when it is full or switched off.
Source: derived, no source of its own · checked on 2 Nov
Where the battery connects to the solar system: on the DC side, between the panels and the inverter, or on the AC side, behind the inverter.
2,000 W on this model
Lowest
0 W Highest
8,000 W Middle
1,900 W
Higher than 14 of the 28 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The most solar power the battery takes in directly from panels.
4 on this model
Lowest
2 Highest
4 Middle
3
Higher than 13 of the 25 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How many separate strings of panels it takes, each tracked for its best power.
60 V on this model
Lowest
55 V Highest
600 V Middle
60 V
Higher than 6 of the 20 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The highest voltage the solar input takes. A string of panels must stay below it, on a cold day too.
6,000 on this model
Lowest
3,000 Highest
10,000 Middle
6,000
Lower than 9 of the 25 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How many full charge cycles the maker rates the cells for.
70 % on this model
Lowest
60 % Highest
80 % Middle
70 %
Higher than 2 of the 17 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The share of capacity the maker says is left after the rated cycles.
10 years on this model
Lowest
2 years Highest
12 years Middle
10 years
Higher than 5 of the 38 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How many years the maker’s warranty on the battery runs.
Source: de.ecoflow.com · checked on 2 Nov
What the battery powers during a power cut: nothing, a device at its own socket, chosen circuits, or the whole home.
13 of the 16 models we track have this.
Source: de.ecoflow.com · checked on 2 Nov
Whether the system runs without any grid connection.
23 of the 23 models we track have this.
Source: de.ecoflow.com · checked on 2 Nov
Whether the battery can charge when power is cheap and discharge when it is dear, on an hourly price.
13 of the 13 models we track have this.
Source: de.ecoflow.com · checked on 2 Nov
Whether you can set times for the battery to charge and discharge.
Source: de.ecoflow.com · checked on 2 Nov
How the battery connects to your network or the app.
Source: de.ecoflow.com · checked on 2 Nov
The maker’s app for the battery.
Source: de.ecoflow.com · checked on 2 Nov
How well the case keeps out dust and water. A battery that stands outdoors needs a higher rating.
-20 °C on this model
Lowest
-20 °C Highest
-10 °C Middle
-20 °C
Lower than 1 of the 31 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The coldest temperature at which the battery works.
55 °C on this model
Lowest
45 °C Highest
60 °C Middle
55 °C
Higher than 2 of the 31 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The warmest temperature at which the battery works.
28 of the 28 models we track have this.
Source: de.ecoflow.com · checked on 2 Nov
Whether the battery warms its own cells, so it charges in cold weather.
38.8 kg on this model
Lowest
4.7 kg Highest
82 kg Middle
25.9 kg
Higher than 27 of the 37 models we track.
Source: de.ecoflow.com · checked on 2 Nov
The weight of the battery, or of one unit for a battery built from several.
30 dB on this model
Lowest
30 dB Highest
43 dB Middle
30 dB
Lower than 3 of the 11 models we track.
Source: de.ecoflow.com · checked on 2 Nov
How loud the battery is while it runs, as the maker states it.
Source: de.ecoflow.com · checked on 2 Nov
Whether you set the battery up yourself or an electrician has to connect it.
Sources: de.ecoflow.com
The maker
EcoFlow makes portable power stations, solar equipment and home energy storage, and was started in 2017 by a group of battery engineers. The company says it has regional headquarters in the USA, Germany and Japan. Its home batteries include the STREAM Ultra and the STREAM Ultra X, alongside the DELTA Pro 3 power station.
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