The smart core of the EcoFlow STREAM balcony power plant – combines energy storage and integrated micro-inverter in a seamless solution.
How does the system work to reduce your electricity bill to zero?
As the sun rises, EcoFlow STREAM Ultra immediately begins collecting solar energy for your home and automatically storing excess energy. At night, the stored energy powers your appliances, either directly or via the grid. With an annual generation of up to 2,218 kWh, it covers 71.3% of your household's needs and reduces electricity costs to virtually zero¹.
Dual-mode solar input with 2800 W
EcoFlow STREAM Ultra features a 4-MPPT design and supports up to 2000 W of solar input. Combined with a microinverter, it can provide an additional 800 W. This maximizes the use of every sunny area for power generation.
2300 W AC output
Run two devices simultaneously – with 1200 W output power per battery and automatic boost up to 2300 W. Combined with another STREAM Ultra or STREAM AC Pro, 2300 W of AC output is available. The integrated battery enables off-grid operation and power during power outages.
One step closer to zero electricity costs
Design your home solar system with EcoFlow STREAM Ultra
- Power for high-consumption devices: 2300 W AC output
- Power everywhere: Plug & Play | Vertical design
- Energy combined: Expandable to 11.52kWh | Share energy seamlessly between devices
Small or large – STREAM supplies everything
Zero electricity costs – with four smart setups From lights and routers to refrigerators and kettles – the EcoFlow STREAM series supplies devices with up to 2300 W, entirely with solar power.
Parallel mode Up to 2300 W solar power
- Device setup: 1 × STREAM Ultra + 1 × STREAM Ultra or STREAM AC Pro
- Connect two units with a parallel cable to power high-energy appliances like ovens or dishwashers – entirely with solar energy.
- Output: 1200 W (main unit) + 1100 W (auxiliary unit) = 2300 W total power
Distributed mode Up to 2000 W solar power
- Device setup: 1 × STREAM Ultra + 1 × STREAM Ultra or STREAM AC Pro
- No cables required—simply plug each unit into a separate outlet. The solar panels deliver up to 2000W of power, with support for up to 2300W total output when needed.
- Output: 1200 W (main unit) + 800 W (auxiliary unit) + 300 W (mains) = 2300 W total power
Single mode Up to 1200 W solar power
- Device setup: 1 × STREAM Ultra
- One unit reliably supplies your everyday appliances – ideal for TVs, stovetops, fans and much more.
- Output: 1200 W from a single battery
Energy where your devices are
Devices are distributed throughout the house. Your batteries should be too. This way, you can achieve a zero electricity bill.
More runtime through scalable storage and solar inputs
EcoFlow STREAM Ultra enables flexible DIY expansion for solar storage and PV inputs – from 1.92 kWh to up to 11.52 kWh³ of storage capacity and from 2 kW (4 MPPT) to up to 12 kW (24 MPPT) of PV input, with up to 6 connected units. Two units can be easily coupled to double the capacity – or combined with EcoFlow DELTA series batteries for even more storage.
Energy where it is needed
The AI-powered system monitors all connected devices in real time, ensuring each unit receives sufficient solar energy to power your household appliances. When the EcoFlow STREAM AC Pro in the kitchen runs low, AI-driven load management automatically diverts energy from neighboring units, ensuring your refrigerator continues to run uninterrupted on solar power.
Time-of-Use (TOU) – dynamic electricity tariffs
Charge when electricity prices are low – feed in when they are high.
The AI-based TOU model analyzes tariff data every 60 minutes from platforms such as Nord Pool, Epex Spot, Rabot Energy, Octopus, and others – and always offers you the optimal savings strategy.
High-precision solar and weather forecasts – maximum savings all year round⁶
Powered by Solcast's world-leading solar and weather forecasting, the system processes over 100 million forecasts per hour—including geolocation, satellite imagery, historical weather data, and TMYs (Typical Meteorological Years)—for precise insights and maximum savings in real time.
Smart Meter × Smart Plug: No feeding in. All solar, all for you⁷
EcoFlow partners with leading smart energy brands like Shelly, Tibber, and others to efficiently manage your energy consumption with smart meters, smart plugs, and the EcoFlow app. This allows you to automatically power your garden irrigation, e-bike, or ventilation systems with surplus solar power—and keep every ray of sunshine for yourself.
EcoFlow AI Assistant: No math. Just savings.
Your AI assistant takes over energy management for you – analyzing data, identifying weak points, and providing clear, actionable recommendations. No calculations, no guesswork – just smart, simple decisions.
Scope of delivery - STREAM Ultra
- STREAM Ultra × 800 W
- STREAM solar panel extension cable (2.95 m) × 8
- STREAM AC cable (1.5 m) × 1
- PV wrench × 1
- Mounting bracket × 1
- Locking bracket × 1
- Safety instructions × 1
- Installation instructions × 1
- Warranty card × 1
Scope of delivery - STREAM Pro
- STREAM Pro × 800 W
- STREAM solar panel extension cable (2.95 m) × 6
- STREAM AC cable (1.5 m) × 1
- PV wrench × 1
- Mounting bracket × 1
- Locking bracket × 1
- Safety instructions × 1
- Installation instructions × 1
- Warranty card × 1
1. With 100% solar energy capture and utilization, the EcoFlow STREAM Series system generates 3,060 kWh annually—covering the average household consumption in Germany (3,113 kWh/year). An electricity price of €0.40/kWh results in annual savings of €4,748. Actual savings may vary depending on usage, regional energy prices, and different bundles.
Source: https://pvwatts.nrel.gov/pvwatts.php
2. EcoFlow STREAM Ultra delivers 2,218 kWh of solar energy annually, covering 71.3% of the average household consumption in Germany (3,113 kWh/year) through 24/7 solar power supply. Based on an electricity price of €0.40/kWh, this results in annual savings of €1,109. Actual savings may vary depending on usage and regional energy prices.
Source: https://pvwatts.nrel.gov/pvwatts.php
3. EcoFlow STREAM AC Pro generates 1,041 kWh of solar energy annually. With the average German household's electricity consumption of 3,113 kWh/year, this system covers 33.4% of total energy needs through continuous solar power supply day and night. The electricity price of €0.40/kWh results in annual savings of €412. Savings may vary depending on consumption patterns and price fluctuations.
Source: https://pvwatts.nrel.gov/pvwatts.php
4. The maximum capacity is 6 units, expandable up to 11.92 kWh with EcoFlow STREAM Ultra or EcoFlow STREAM AC Pro.
5. Certain AI features in the EcoFlow app require a premium subscription. Please refer to the EcoFlow app for more information on subscription plans and feature availability. The calculation is an estimate based on an electricity consumption of 10 kWh per day in Munich, Germany (representative of Central Europe), using the STREAM series (6 kWh batteries and 2800 W photovoltaics). The simulation is performed by AI, taking into account fluctuations in electricity prices and consumption to reflect real-world conditions as accurately as possible. Actual results may vary depending on local conditions.
6. The EcoFlow app uses weather data from Solcast, processing over 100 million records per hour to provide forecasts with up to 94% accuracy and a range of up to three days.
( https://solcast.com/)
7. Regulatory Notice (Germany)
In order to benefit from the simplified plug-in solar exemptions according to Section 8 Paragraph 5a EEG 2023 in conjunction with “Solar Package I”,
– the installed PV nominal power ≤ 2000 Wp and
– the inverter apparent power ≤ 800 VA be.
For a total PV output of more than 2000 Wp, additional reporting, metering, or permitting obligations may arise with your grid operator. Please familiarize yourself with the regulations applicable to your location before commissioning.
