EcoFlow STREAM Ultra 1.92kWh All-in-One Storage System 4 MPPT

The EcoFlow STREAM Ultra (MPN: EFSTREAMULTRA800W-EU) combines solar power generation, storage, and an integrated micro inverter in one compact system—ideal for almost complete self-sufficiency. With up to 2,218 kWh of yield per year, it covers around 71% of a household's electricity needs. Thanks to four MPPT inputs and up to 2,000W of PV power, it makes optimal use of every minute of sunshine. The integrated storage solution, flexible expandability, and AI-supported control make the STREAM Ultra the future of decentralized power supply.

Compared to the STREAM Pro, the STREAM Ultra offers higher PV input power and an additional MPPT input – perfect for maximum solar energy yield and larger systems.

Highlights of the EcoFlow STREAM Ultra

• 4-MPPT design
• Dual-mode solar input
• Up to 2,300W AC output
• 1200W bidirectional inverter
• Compatible with STREAM AC Pro
• Plug & Play - easy installation without an electrician
• up to 2,218 kWh of solar power generated per year
• Flexible expansion - from 1.92kWh to up to 11.92kWh
• AI-controlled monitoring and control via the EcoFlow app
• Seamless integration with over 99% of solar panels on the market
• 100% compatible with all micro inverters

Zero electricity costs – realistic and achievable

Smart control, load distribution, dynamic tariffs, and weather forecasts can significantly reduce grid power consumption. In typical households, savings of up to $1,109 per year are possible – without feeding into the grid, but through clever self-consumption optimization.

2300W bypass output

The bypass output of the EcoFlow STREAM Ultra offers a smart solution for using the solar power storage system even more efficiently. While up to 800 W can be fed into the home grid – in accordance with the legally permissible limit for balcony power plants – the bypass output allows parallel direct supply of connected devices with up to 2,300 W. This energy is drawn directly from the battery or the solar feed-in, without detour via the home network. This means that even powerful household appliances such as kettles, washing machines, or microwaves can be operated without exceeding the feed-in limit.

Compatibility with STREAM AC Pro

The EcoFlow STREAM Ultra can be seamlessly combined with the STREAM AC Pro to create a powerful and flexible energy system. By connecting both devices, the total power output can be increased and the power supply in the household optimized. The combination enables intelligent load distribution and maximizes the use of solar power and stored energy.

Flexible expansion

Thanks to 4 MPPT inputs, the solar input can be expanded to up to 12 kW. The storage unit is modular and can be expanded to up to 11.92 kWh – ideal for small to large households. Two STREAM Ultra units can be paired or connected to EcoFlow DELTA batteries.

Intelligent energy management with AI

The integrated AI system recognizes consumption patterns, analyzes tariff data, and automatically redirects energy as needed. For even distribution, energy from other units is switched on when one unit reaches its capacity limit. This ensures a continuous supply and optimal utilization of the stored electricity.

Dynamic electricity tariff usage (TOU model)

The Time-of-Use (TOU) model analyzes electricity prices from sources such as Nord Pool, Epex Spot, or Tibber in real time. The system automatically charges when prices are low and feeds in when prices are high—for maximum savings through intelligent tariff usage.

High-precision weather forecast

Through Solcast integration, the system processes over 100 million weather and solar forecasts per hour. Satellite data, geolocation, historical weather data, and typical meteorological years (TMY) ensure accurate energy planning.

Technical data