EcoFlow STREAM Ultra X Inverter (Battery)

The EcoFlow STREAM Ultra X is a high-performance inverter with an integrated battery for domestic solar installations, which transforms a balcony solar system into a fully-fledged energy hub for your house or flat. The model combines a battery, inverter, MPPT controller and smart control system in a single unit.

The main advantage of the STREAM Ultra X is its increased capacity of 3.84 kWh. This energy reserve offers greater flexibility in day-to-day use: solar power generation is not limited to daily consumption but can be stored for use in the evening, the morning or at times of peak demand.

The unit supports the direct connection of solar panels with a total output of up to 2,000 W. Four independent MPPT trackers, each with a capacity of 500 W, are provided for this purpose. This design is particularly useful when the panels are facing in different directions or when some of the panels are temporarily in the shade.

STREAM Ultra X operates on the 230 V domestic mains supply and can feed up to 800 W into the home’s electricity grid. Up to 1,200 W in off-grid mode; in grid-connected mode, appliances of up to 2,300 W (10 A) can be connected to the AC outlets. This opens up further possibilities for powering domestic appliances within the system’s capacity.

The battery is based on LiFePO₄/LFP technology and is designed for 6,000 charge cycles, retaining up to 70 per cent of its capacity. This means the STREAM Ultra X is not just a short-term accessory, but a long-lasting component of the home energy system for everyday use.

The system supports Wi-Fi and Bluetooth, and is controlled via the EcoFlow app. In the app, you can monitor the charge level, solar power generation, consumption and the operation of connected devices, as well as configure the logic for using the stored energy.

The STREAM Ultra X can be used on its own, or the system can be expanded with other devices from the EcoFlow STREAM series. The documentation states that the system supports up to 6 STREAM devices, which allows for an increase in total capacity and flexible placement of the storage units in different areas of the home. 

The housing has an IP65 protection rating, and cooling is achieved through natural convection without a fan. As a result, the unit operates quietly, requires no active ventilation and is suitable for installation on a balcony, terrace, in a utility room or in a room with normal ventilation.

The battery measures 420 × 294 × 460 mm and weighs 38.8 kg. The housing design is suitable for both fixed and portable installation, and a fold-out handle facilitates the safe transport of the unit during installation or maintenance.

The EcoFlow STREAM Ultra X is ideal for anyone who wants a larger energy reserve than that offered by the 1.92 kWh versions, whilst retaining the simple connection setup to their home solar system. This is a solution for households where not only are daytime savings important, but so is access to their own stored energy when the sun is no longer providing sufficient power.