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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 2-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.
Ready For Any Weather
What's in the box - STREAM Ultra
STREAM Ultra × 800W
STREAM Solar Panel E×tension Cable (2.95m) × 8
STREAM DIY Cable (1.5m) × 1
PV Wrench × 1
Mounting Bracket × 1
Locking Bracket × 1
Safety Instructions × 1
Installation Guide × 1
Warranty Card × 1
What's in the box - STREAM Pro
STREAM Pro × 800W
STREAM Solar Panel E×tension Cable (2.95m) × 6
STREAM DIY Cable (1.5m) × 1
PV Wrench × 1
Mounting Bracket × 1
Locking Bracket × 1
Safety Instructions × 1
Installation Guide × 1
Warranty Card × 1
What's in the box - STREAM Max
STREAM Max × 800W
STREAM Solar Panel Extension Cable (2.95m) × 4
STREAM DIY Cable (1.5m) × 1
PV Wrench × 1
Mounting Bracket × 1
Locking Bracket × 1
Safety Instructions × 1
Installation Guide × 1
Warranty Card × 1
FAQ
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.
Is it normal for the product to heat up during use?
Yes, a temperature rise during use is normal and does not affect the product’s lifespan. The unit has passed rigorous testing and includes overheat protection. For best performance, install it out of direct sunlight with at least 3 cm clearance from walls or objects, and away from flammable materials.
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.
How does the system continue to supply power during a blackout?
For safety and compliance reasons, the STREAM system will automatically detect a grid anomaly and stop feeding current into the grid during a power outage. You can then plug in your appliances directly into the AC outlets to use internal battery or solar power.
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.
Each MPPT of the STREAM Ultra/Pro has a maximum power of 500W. Can I connect solar panels with more than 500W to each port?
Yes, as long as the solar panel meets the conditions of operating voltage (15-60V) and operating current (≤14A). This can optimize solar utilization during low sunlight conditions.
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).
Specs - STREAM Ultra
Capacity
1.92kWh
Cycle Life
6000 cycles
AC Charging Input
1050W
AC Output
1200W
MPPT
4
PV Input Power
2000W (500W × 4)
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
23.1kg
Dimensions
284mm x 255mm x 458mm
Acoustic Noise
＜30 dB
Warranty
2-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
2-Year
Specs - STREAM AC Pro
Capacity
1.92kWh
Cycle Life
6000 cycles
AC Charging Input
1050W
AC Output
1200W
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
21.5kg
Dimensions
255mm × 254mm × 458mm
Acoustic Noise
＜30 dB
Warranty
2-Year
1. EcoFlow STREAM Ultra delivers 2,218kWh of solar energy annually, achieving 71.3% coverage of Germany's average household consumption (3,113kWh/year) through 24/7 solar power supply. Based on the electricity rate of €0.40/kWh, this system provides annual savings of €887. Actual savings may vary depending on usage behavior and regional energy pricing.
Source:https://pvwatts.nrel.gov/pvwatts.php
2. The installation time is based on test results from the EcoFlow Lab. Actual installation time may vary depending on system configuration and real-world conditions.
3. The maximum capacity is 6 units, expandable up to 11.52kWh with the EcoFlow STREAM Ultra or EcoFlow STREAM AC Pro.
4. Certain AI features in the EcoFlow app require a premium subscription. Please refer to the EcoFlow app for details on subscription plans and feature availability.
5. The calculation is an estimate based on 10 kWh/day electricity consumption in Munich, Germany (representing Central Europe), using STREAM series products (6kWh batteries and 2800W PV). It is simulated by AI, factoring in fluctuations in electricity prices and usage for a closer reflection of real-world conditions. Actual results may vary depending on local conditions.
6. The EcoFlow app integrates weather data from Solcast, running over 100 million data operations per hour to deliver forecasts with up to 94% accuracy and horizons of up to three days. (https://solcast.com/)
7. After installing STREAM Series battery and compatible Smart Meter, users can connect appliances to wall outlets via compatible Smart Plugs, enabling remote on/off control and operation scheduling through the EcoFlow app—thereby minimizing solar energy waste.
8. Actual EcoFlow app functionality may vary; the screens shown are for illustrative purposes only.
Review for 2 x Ultra X Stream + 8 x 500w panels.
I ordered the bundle in August and everything delivered with a week or two. I'm not a DIY expert but had no problems getting the panels all mounted on a spare flat roof (using a flat roof mounting kit that, based on my research, keeps the install within UK permitted development). Cables run down to the garage and into the stream units.
I've been really impressed with the app and configuration options. We hardly use any peak rate electric now, and instead using off peak power to charge the batteries. I think we will be saving around £500 per year with the 8 panels and 2 Ultra X
Thanks Ecoflow!
Easy set up self explanatory, app is a little fiddly to understand at the start but after a few days it becomes very easy to understand. Highly recommended the smart meter to go with this!
All the power.
Really good battery with enough power to cover the ordinary running of our house with one of us working from home.
The large amount of solar input is great. It is stylish enough to blend in in the living room.
All in all really impressed. i only wish it came with some solar extention cables of 10m+ rather than having to go 3rd party.
Paired with the Smart meter this thing is amazing.
At the time of purchase, a set of 4 x 250W panels were offerred for just £1. No explanation of how to incorporate these extra panels was offerred, and eventually tech support gave a suggestion that did not make any sense.
I purchased an extra micro-inverter and connected the extra panels to that, with the output plugged into one of the battery AC i/o ports.
This is working perfectly with an average output in October with east facing panels of around 7kWh per day. In an ideal setup this would be considerably more, but this is adequate for the low installation cost and should break even within 2-3 years.
As I am retired, there is a constant power use in the home, so the battery has so far not gone past 50% charge, so this system is a good balance for my circumstances.
This relatively low cost method is a good introduction to using solar, compared to the high cost of a roof mounted traditional system.
Highly recommended.
Excellent battery system, easy to install and set up, small footprint and stylish look. The app is user friendly after investing a small amount of time to learn how it works. Combined with solar and low overnight tariff this system is saving me significant money on my monthly electricity bill.
Excellent battery system, easy to install and set up, small footprint and stylish look. The app is user friendly after investing a small amount of time to learn how it works. Combined with solar and low overnight tariff this system is saving me significant money on my monthly electricity bill.
I'm not interested in a large solar array at the moment so this has been great. Works perfectly with two panels and micro-inverter. I did plan on running solar cables straight to the battery but efficiency and charging has been fine via the existing micro-inverter so probably not going to go to the effort of running more cables.
Compact (but very heavy) battery. Looks really sleek. Mine is hidden away but could easily be on display.
Is completely covering my base load and taking a good chunk off high energy usage. Need more time to work out just how cost effective it is though.
App and setup was fairly easy. Had to reset a couple of time at the beginning but running smoothly now.
Tried the battery without a smart meter for a couple of weeks, wouldn't recommend that. It does function without one but is amazing how much energy is lost - smart meter (bought separately) is essential.
I started with the micro inverter but a month in i realized a battery was needed as well as extra panels to make the most of the solar generation.
I went from 2 panels mounted west to 2 more to the east on the summer house roof, the odd time i need to charge the battery due to little sun light but most days there is enough solar to feed the house and charge the battery, my next bill looks like one from the 1990's.
This worked first time out of the box and delivers what it says, which is all you can ask for, really. Set it up in my office log cabin. Obviously takes longer to fill the battery and as my array is only 1280w max (4x Renogy 320w compact -- it was a self-install so I wanted to keep the weight down for easy handling) except on the sunniest days it was struggling to fill it fully thanks to tree shading after 2.30/3pm. But the upside is it lasts twice as long as the Ultra. I've since added an Ecoflow Stream Microinverter in a separate part of the house to cover the base load, which allows the ultra x to charge more quickly.
Great bit of kit. Super easy to install. Instantly saving money straight out of the box! And the app is really great too. Would highly recommend.
Amazing bit of kit. Works flawlessly and has reduced my bills by at least 60% for the last month. And if you have an EV day night tarrif it will still save money even during the winter without solar panels. The only regret I have is not waiting another couple of months for the new 5000 series which would have been alot more suitable for my needs
Happy with the system. All works as I imagined it would
I love the Ecoflow Stream Ultra X. I use it for load shifting for now, but it is making real savings already. I hope to connect it to my plugin solar panels next once they are set up.
Unreal - I set this system up in less than half an hour. Plug and play by definition! Running perfectly and the solar is powering the house for half the day, with the ultra X covering time before and after sunlight. Thrilled with the purchase!
This is an honest review, I am not sponsored or affiliated with Ecoflow ,
all Steam batterys I have bought by myself and like most of you I had to wait for delivery as they are so popular but are worth it.
After seeing a video on YouTube with Mr steve jones DIY that the uk was getting Plug in solar I order a Ecoflow Stream Ultra and an ecoflow smart meter and I ordered 4 solar panels from The Plum Centre that Mr steve jones DIY had recommended and I ordered a drum of 50 meters of 4mm solar cable and mc4 plugs from the plum centre.
I had a local Electrician install the solar panels run the cables, hard wire the power cable into the consumer box (at the moment it has not been passed just to plug in) and the smart meter and he also changed the consumer boxes the one in the workshop and the one in the house as they all needed changing as they were too old.
And put in the BI direction RCD, he also did the g98 form and all other certificates.
I have bought an stream Ultra X and a parallel lead so that they can be daisy chained Together and work as one just under 6 kWh. I am so impressed that I’m thinking of ordering another Ulta X as I find that just under 9.2kWh would work great in running our house and especially over the winter months with the 9p per kW overnight charge that at the moment I don’t need as I’m generating 10 kWh per day with just 4 solar panels.
Im going to be ordering some more panels next year.
Now to Ecoflow customer service which in fair have emailed me back next day and have been very helpful on the phone sorting out some small issue I had.
Now the ecoflow app I know that there will be a new one coming out in the next few months but as Mr steve Jones DIY says sits very well made and it gives you all the stats you need, but it does have a little niggle like it shows that the batterys have been disconnected for a few seconds and them come back on, this only happens on my iphone and it works perfectly on my ipad, so work that out.
There are new ecoflow battery’s coming out in the next few months, but I’m happy with what I have as I don’t have room vertical and maybe they might bring down the prices to reflect this.
There are plenty of videos on YouTube with plenty of advice on installation.
These ecoflow batterys come with 10year warranty, so what you waiting for !!
Just starting on this journey and so far it has been great. Delivery of my complete order took 6 weeks which was a bit of a disappointment.
The equipment is working perfectly and saving me a lot more than I had imagined on my electricity bill.
I’m waiting on the upcoming release of the 5kwh battery and hoping it is not too expensive.
The Ultra X is a great unit - it works fantastically with solar charging and my garden setup. Setup was simple, and I'm already making great savings!
However I would note that if you are aiming to earn through solar excess this system isnt great for that. Get this system if you aim to use all of generation you make.
There is a bug in the system where the battery is not bypassed when full so that solar MUST go through the battery before going to the grid. Example: Battery reaches 100% charge -> solar will stop -> battery will discharge till there is room -> Battery charges back up. It's not ideal but if you aim to use all your generation its not a big deal.
Ordered without any problems. Slight 1 day delay from the courier company. Everything worked exactly as it should after plugging in 4 x 475 watt panels and connecting to a plug. Now saving money every day.
There were a few problems receiving the unit but the company were good in getting it resolved.
They also sent me a different cable for installation to comply with uk regulations.
The unit is really easy to install although final connection to the consumer unit should only be done by an electrician.
Overall I’m very happy with it, it’s like the apple of micro inverters. Nicely packaged & a smart looking device. The app is good & there’s nothing not to like.
