EcoFlow STREAM Ultra X Home Solar Battery
Choose Your STREAM Batteries
Solar Panels
Mounting Locations
Bracket - Lattice Balcony
Bracket - Semi-enclosed Balcony
Balcony Hook Kit
Bracket - Concrete Balcony
Bracket - Flat Roof
Bracket - Pitched Roof
Bracket - Flat Roof
52°~70° Bracket Adjustable - Facade
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Hallo 👋
Sparen Sie mit einem individuellen Energieplan
In wenigen einfachen Schritten zu einer Energielösung, die auf Ihre Sparziele zugeschnitten ist.
All-in-One Hybrid System
The smart core of the EcoFlow STREAM Power Plant — combining energy storage and a built-in microinverter in one seamless solution.
How Does It Work to Drive Your Energy Bills to 0?
As the morning sun rises, EcoFlow STREAM Ultra instantly captures solar energy for your home, storing any surplus automatically. At night, this stored power runs your appliances, directly or through the grid. Generating up to 2,218kWh annually, it meets 71.3% of household needs, cutting electricity bills to almost zero¹.
Dual-mode 2800W solar input
EcoFlow STREAM Ultra features a 4-MPPT design, supporting up to 2,000W solar input. It also works with third-party microinverters; connecting to the solar battery adds 800W more. Maximises power generation from every sunlit area.
2300W AC output
Run two appliances independently via dual AC outlets, with 1,200W output per battery and auto-boost up to 2,300W (on-grid). Pair with another STREAM Ultra or STREAM AC Pro for full 2,300W (on-grid) AC output. The built-in battery ensures off-grid use and backup during outages.
One Step Closer To 0 Bills
Build Your Home Solar Plant Around EcoFlow STREAM Ultra
Longer Runtime with Scalable Capacity and Solar Input
EcoFlow STREAM Ultra offers flexible DIY solar storage & PV input expansion — solar storage expansion from 1.92kWh up to 11.52kWh³ , and PV input expansion from 2kW(4 MPPT) to 12kW (24 MPPT), with up to 6 connected units. Easily pair two units to double your capacity or integrate with EcoFlow DELTA Series batteries for even greater storage.
Don't Let Clouds or Dusk Limit Your Solar Power
The STREAM Battery uses advanced low-light technology to capture energy from even muted skies, delivering up to one extra hour of solar harvest each day compared to industry averages.
More Savings, Fewer Calculations—Through Software⁴
Boost Your Savings with the TOU Model and Solar Forecasting⁵
Time‑of‑Use (TOU) Dynamic Electricity Pricing
Charge when prices are low, supply when prices are high.
AI-TOU model offers you the optimal bill-saving strategy every 60 minutes, based on the analysis of tariff data from Nord Pool, Epex Spot, Rabot Energy, Octopus, and more.
High Accuracy Solar Forecasts, Maximize Your Savings All Year Round⁶
Powered by Solcast's world-leading solar and weather forecasting, processing over 100 million forecasts per hour—including geolocation, satellite imagery, historical data, and TMYs (Typical Meteorological Years) —to deliver real-time insights and savings.
Smart Meter × Smart Plug: Zero Feed-in. All Solar, All Yours⁷
EcoFlow works with leading smart energy brands like Shelly, Tibber, and more, managing your home's power with the Smart Meter, Smart Plugs, and the EcoFlow app. Automatically run appliances like your sprinkler, e-bike, or ventilation using surplus solar. Let every ray of sunshine stay yours.
EcoFlow AI Assistant: No Math. Just Savings.⁸
Your AI Assistant simplifies energy management by doing the hard work for you—analyzing data, spotting inefficiencies, and giving clear, actionable recommendations. No calculations, no guesswork—just smart, easy decisions.
Protecting Your Privacy, Always.
EcoFlow protects your data using top-level security measures certified by global standards including TRUSTe, NIST, ISO, and more.
Safety You Can Trust
Built into Both Hardware & Software
Long-Lasting Power with LFP Technology
Equipped with advanced LFP battery cells, STREAM delivers up to 6,000 deep cycles with 70% capacity retention — lasting up to 3× longer than traditional batteries. That means up to 15 years of reliable use, backed by a 10-year warranty.
Silent Operation — as Low as 30 dB
Experience whisper-quiet performance with noise levels as low as 30 dB.The advanced self-cooling design dissipates heat efficiently — no disruptive fan noise, just silent, reliable power.
What's in the box
What's in the box
Specs - EcoFlow STREAM Ultra X
Capacity
3,84kWh
Cycle Life
6000 cycles to 70% capacity
AC Charging Input
1200W
AC Output
1200W
MPPT
4
PV Input Power
2000W (500W*4)
PV Input Voltage
Maximum 60V DC
AC Output-Grid Tied
800W
AC Charging Input
10A
Max Device Power Supported
2300W (10A)
Operating Temperature
-20~55°C
Battery Self-Heating
Low-Temperature Charging Activation (≤5°C)
Connection
Wi-Fi/Bluetooth
Ingress Protection Rating
IP65
Net Weight
38,8kg
Dimensions
420mm × 294mm × 460mm
Acoustic Noise
＜30 dB
Warranty
10-Year
Specs - STREAM Pro
Capacity
1.92kWh
Cycle Life
6000 cycles
AC Charging Input
1050W
AC Output
1200W
MPPT
3
PV Input Power
1500W (500W × 3)
AC Output-Grid Tied
800W
AC Charging Input
10A
Max Device Power Supported
2300W (10A)
Operating Temperature
-20~55°C
Battery Self-Heating
Low-Temperature Charging Activation (≤5°C)
Connection
Wi-Fi/Bluetooth
Ingress Protection Rating
IP65
Net Weight
22.8kg
Dimensions
284mm x 255mm x 458mm
Acoustic Noise
＜30 dB
Warranty
10-Year
FAQ
What are the differences between the STREAM Max and the STREAM Ultra/Pro?
1. In off-grid mode, the STREAM Max doesn't support discharging via the AC outlet, but it can be charged using the PV port.
2. When the STREAM Max and STREAM Max/AC are connected in parallel, they must be connected to the AC outlet of the STREAM Max using an AC cable. For more information, see the System Expansion Chapter of the STREAM Max User Manual.
*Note: After completing the installation and connection of the STREAM Max, you must configure the system wiring settings in the app before using the device.
3. When a STREAM Max is connected to a STREAM Ultra/Pro/AC Pro/Ultra X in parallel, only one device can be connected to the end of the connection chain.
What are the differences between the STREAM AC and the STREAM AC Pro?
1.The STREAM AC doesn't support discharging in off-grid mode. It can only work in on-grid mode.
2. The maximum charging/discharging power of the STREAM AC battery is 800W.
3. When the STREAM AC and STREAM Max are connected in parallel, they must be connected to the AC outlet of the STREAM Max using an AC cable. For more information, see the System
Expansion Chapter of the STREAM AC User Manual.
*Note: After completing the installation and connection of the STREAM AC, you must configure the system wiring settings in the app before using the device.
4. When a STREAM Max is connected to a STREAM Ultra/Pro/AC Pro/Ultra X in parallel, only one device can be connected to the end of the connection chain.
What are the differences between the STREAM Ultra X and the STREAM Ultra?
1.The battery capacity of the STREAM Ultra X is 3.84kWh, which is twice the
battery capacity of the STREAM Ultra.
2. The battery of the STREAM Ultra X has a greater charging power. The maximum charging power is 1500W when using PV, 1200W when using the grid and 1500W when using both.
3. Replacing the DIY Front Case of the STREAM Ultra X is a different process.For more information, see the STREAM Ultra X User Manual.
Is the STREAM Solar Battery compatible with other products (including third-partyproducts)?
Please read the Product Compatibility List in the User Manual before purchasing and using the STREAM Solar Battery with other products (including third-party products).
How does the STREAM system work?
The system prioritizes solar energy. When solar generation falls short of the power demand, the battery automatically steps in to make up the difference. If there’s still a shortfall, the grid supplies the remaining power.When solar output exceeds consumption, the excess energy is first stored in the battery. Any additional surplus can be exported to the grid, depending on your settings and in compliance with local regulations.
What is required to enable energy balancing between multiple STREAM Series units?
All devices must be connected to the same network and added to the same “Space” within the EcoFlow app.
Does the STREAM Series need to be connected to Wi-Fi and the EcoFlow app?
To access the full functionality of the STREAM Series, a connection to Wi-Fi and the EcoFlow app is required. Bluetooth or LAN-only connections will not support features like remote control or historical data tracking.
Can I install the STREAM Series by myself?
In the UK, local regulations require the EcoFlow STREAM DIY Cable to be wired into the distribution board, which must be done by a certified installer or electrician.
Will the excess power generated by the STREAM system be fed into the grid?
If you disable the feed-in protection switch in the EcoFlow app, the excess solar power will be fed into the grid.
Can I receive compensation for excess power fed into the grid by the STREAM system?
Compensation policies may vary by region. You should contact your local grid operator using the contact information provided on your electricity bill to inquire.
Can third-party solar panels be used with the STREAM Series?
As long as the panels meet the input range for the PV port and use the same type of connector, they can be used. Each PV port’s input range is: operating voltage 15-60V, operating current ≤14A.
How many microinverters can the STREAM Series support? Can third-party microinverters be used?
Due to regulatory limits, it is recommended to connect no more than one microinverter.
If there are multiple devices in the STREAM system, will it prioritize using up one device's power before starting to use another's?
Not necessarily. It might prioritize using one device's power or discharge multiple devices simultaneously. The system employs an intelligent charging and discharging strategy based on the current power levels of the devices, the power consumption of the appliances, the actual connection setup, and your settings in the app. Thus, the discharging performance of specific devices may vary.
What does the AI TOU feature of the STREAM Series refer to?
The AI TOU feature means that the EcoFlow app will use dynamic electricity price data from the local power company to perform smart charge and discharge strategies based on peak and off-peak pricing, maximizing your electricity bill savings. This feature requires a subscription.*An AI TOU strategy will only be generated when the price difference between peak and off-peak is substantial enough because charging and discharging involve losses. If the economic benefits are less than the battery loss, charging and discharging will not take place.
Can I connect the STREAM Series to the output port of a Portable Power Station? Can I connect a Portable Power Station to the STREAM Series' AC outlets to use it as an additional power pack?
No. / No. The Portable Power Station can only be charged by the STREAM Series products, not discharge to them. If you need to expand capacity or power, you can increase the number of STREAM Series products in the STREAM system (up to 6 devices per system).
