EcoFlow STREAM Ultra X Solar Battery 3.84 kWh – Micro Inverter with Double Storage

The EcoFlow STREAM Ultra X is the logical next step from the STREAM Ultra – with double the storage capacity. While 1.92 kWh is enough for many households to get through the evening, the Ultra X with its 3.84 kWh delivers genuine energy autonomy: enough storage to cover the evening, the night, and the following morning entirely on self-produced solar energy. Same principle, same simplicity, double the reserve.

3.84 kWh – double capacity for maximum independence

With 3.84 kWh of storage capacity, the STREAM Ultra X covers a significantly larger share of daily household electricity consumption. Solar power generated during the day is stored in the Ultra X and used in the evening for lighting, entertainment devices, the washing machine, or charging equipment. In a typical Swiss household with a daily consumption of 8–12 kWh, the Ultra X covers roughly 30–40 % of daily demand from stored solar power alone.

4 MPPT inputs – up to 2000 W solar, maximum flexibility

Four independent MPPT trackers allow the connection of up to four solar panels with a combined output of 2000 W. Because each input has its own tracker, panels with different orientations, tilts, or sizes can be combined without a less exposed panel pulling down the performance of the others. Ideal for balconies with complex configurations or installations where panels are mounted across multiple facades.

Three modes. One device.

The STREAM Ultra X masters three operating modes, switching automatically depending on the situation: in grid-connected mode, it feeds up to 600 W of solar power directly into the home network. In off-grid mode, it powers connected devices with up to 1200 W from its own storage. In bypass mode, it channels up to 2300 W from the grid as needed – so even high-draw appliances like washing machines or ovens can keep running. During a power outage, the STREAM Ultra X takes over backup power supply instantly and without interruption.

1200 W AC charging input – charged faster, independent for longer

The increased AC charging input of 1200 W ensures that the larger storage can be recharged quickly even during low-sunshine periods – for example overnight via the grid during off-peak tariff windows. Combined with the Eco-AI's AI-TOU mode, charge and discharge cycles are automatically shifted to the most cost-effective time slots.

AI energy management – thinks ahead, saves automatically

The integrated Eco-AI continuously analyses the household's energy consumption and optimises in real time when to store, when to feed in, and when to draw from the grid. All of this runs in the background – visible and controllable via the free EcoFlow app from your smartphone, anywhere.

Plug and Play – installed without an electrician

Despite the system's power, installation stays simple: the STREAM Ultra X is plugged into a standard wall socket via the included AC cable, and the solar panels are connected via the four MC4 inputs. No electrician, no building permit on the device side, no waiting time. Commissioning and configuration are handled entirely via the EcoFlow app.

Silent, robust, long-lasting

With a noise level of under 30 dB, the STREAM Ultra X operates almost silently. The IP65 protection rating makes it suitable for outdoor installation, and the LFP cell chemistry guarantees 6,000 charge cycles at a minimum of 70 % remaining capacity – equivalent to over 16 years of daily use.

Note on regulatory requirements

Please clarify any permit or notification requirements with your local grid operator before installation. Legal requirements may vary by municipality and canton.

Technical specifications

• Max. PV input power: 2000 W (4x 500 W)
• MPPT trackers: 4
• Max. AC charging input: 1200 W
• AC output power, grid-connected: 600 W
• AC output power, off-grid: 1200 W (bypass up to 2300 W)
• Max. supported device power: 2300 W
• Capacity: 3.84 kWh (3840 Wh)
• Off-grid use: yes
• Service life: 6,000 cycles (LFP cells, 70 % residual capacity)
• Operating temperature: –20 °C to +55 °C
• Protection rating: IP65
• Connectivity: Wi-Fi / Bluetooth
• Noise level: <30 dB
• Dimensions: 420 × 294 × 460 mm
• Weight: 38.8 kg

Scope of delivery

• 1x EcoFlow STREAM Ultra X
• 1x AC cable, 1.5 m
• 4x solar panel extension cables, 2.95 m
• 1x PV spanner
• 1x mounting bracket
• 1x locking bracket
• Installation guide and safety instructions
• Warranty card

Swiss Warranty – Local. Professional. Sustainable.

As an authorised EcoFlow partner, we provide the comprehensive Swiss Warranty. In the event of a warranty claim, your device will be inspected and repaired in Switzerland at the authorised EcoFlow service centre – no lengthy transport routes abroad.