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ESHigh-performance AC-coupled energy storage system
The EcoFlow STREAM Ultra X is a modern energy storage system with a 3,84 kWh capacity, four MPPT inputs, and a weatherproof IP65 housing. It was specifically designed for balcony power plants and smaller solar systems to efficiently store solar power and make it available around the clock.
Maximum flexibility for your everyday life
With the STREAM Ultra X, you benefit from a modular solution that grows with your energy needs. Whether as a standalone storage unit or in parallel operation with AC Pro expansion batteries – you design your system to suit your household.
Four independent MPPTs optimize PV yield, while low-light technology provides additional energy even at dusk. The intelligent BMS ensures maximum operational reliability and extends the lifespan of the LiFePO₄ battery.
EcoFlow STREAM Ultra X
Low-light technology
Even in cloudy or twilight conditions, the STREAM battery reliably generates power – up to 1 hour more solar yield per day.
Safety at the highest level
Integrated hardware and software protection systems prevent overload, overheating, and short circuits.
Smart control integration
Compatible with Tibber, Shelly and other smart home platforms for intelligent energy management
EcoFlow STREAM balcony power plant video
Plug & Play & quick retrofit
Thanks to AC coupling, the storage system can be integrated without complex modifications. Existing balcony power plants remain untouched; installation is completed in just a few steps and can be expanded at any time with additional STREAM units or AC Pro add-on batteries.
Ready for any weather
The IP65-certified housing provides reliable protection against dust and rain. This allows the STREAM Ultra X to be operated under a balcony, on a porch roof, or in a sheltered outdoor area – reliably year-round, even with fluctuating temperatures and high humidity.
EcoFlow STREAM Ultra X Q&A
Q&A about the EcoFlow STREAM Ultra X
What is the EcoFlow STREAM Ultra X?
The EcoFlow STREAM Ultra X is an AC-coupled energy storage system with an integrated inverter, designed for balcony power plants and small solar systems to efficiently store and use solar energy.
Can I install the EcoFlow STREAM Ultra X myself?
Yes. The EcoFlow STREAM Ultra X is designed as a plug-and-play system and can be easily connected without any specialist knowledge.
Is the EcoFlow STREAM Ultra X weatherproof?
Yes. Thanks to its IP65 protection rating, the EcoFlow STREAM Ultra X is protected against dust and rain and is ideal for balconies, terraces or canopies.
How can I expand the storage capacity of the EcoFlow STREAM Ultra X?
You can combine the EcoFlow STREAM Ultra X with a second Ultra X or up to four EcoFlow AC Pro additional batteries to increase the total capacity to up to 23 kWh.
What is the maximum power output of the EcoFlow STREAM Ultra X?
In parallel operation, the EcoFlow STREAM Ultra X achieves an output power of up to 2,300 W, sufficient for high-performance household appliances.
What battery technology does the EcoFlow STREAM Ultra X use?
The EcoFlow STREAM Ultra X uses a long-lasting LiFePO₄ battery that achieves over 6,000 charging cycles at 70% capacity.
Does the EcoFlow STREAM Ultra X also work under cloudy skies?
Yes. The EcoFlow STREAM Ultra X uses advanced low-light technology to generate electricity even in low sunlight conditions.
Can I control the EcoFlow STREAM Ultra X via an app?
Yes. The EcoFlow OASIS app allows you to monitor energy flows in real time, control charging times, and activate AI mode for dynamic electricity tariffs.
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