EcoFlow STREAM Ultra

More and more people want to decide for themselves what happens with the energy they generate. The EcoFlow Stream Ultra is a plug-in home battery that lets you easily use your own solar energy. When combined with solar panels, it becomes a compact and complete energy solution for your home. Connect the panels, plug it into a standard socket, and your home will automatically switch to using your own electricity. You can use the energy right away or store it for later, no installer, no modifications to your home required. With a smart setup, you can get impressive performance: up to 6900W of power delivered directly to your devices.

The Stream Ultra is ideal for those who don’t yet have solar panels but still want to take the first step independently. Each unit allows you to connect solar panels with a total output of up to 2000W, divided across four MPPT inputs. It has a battery capacity of 1.92 kWh, expandable to 3.84 kWh by adding a second EcoFlow Stream battery. You can connect up to six batteries in total, in any combination of Stream Ultras, Pros, and AC Pros, whether three dual setups or a mix of two standalone Ultras and two paired AC Pros. This gives you a total storage capacity of up to 11.52 kWh. Tailor the system to match your energy usage, available space, and desired output.

Each Stream Ultra delivers 1200W of power. When combined with another Stream battery, the output increases to 2300W. Enough to power a washing machine, fridge, and TV at the same time. With three Stream sets, you can deliver up to 6900W to your appliances. Power is supplied directly through the two built-in AC outlets. Each Stream Ultra has two of these connections, allowing you to power devices directly—without relying on the grid. This means your essential appliances keep running, even during brief power outages.

Surplus solar energy doesn’t go to waste: the system automatically stores it whenever your production exceeds your consumption. When no solar energy is available, it uses the stored power or, if configured, recharges from the grid when electricity prices are low. Each unit can feed up to 800W back into the grid via a standard outlet, with a maximum feed-in capacity of 800W per phase. Thanks to its modular design, you can combine multiple batteries, and the system automatically optimizes whether to charge, discharge, or power your devices directly.

Control is fully automated via the EcoFlow OASIS platform. This intelligent software uses AI to analyze your consumption, solar generation, and energy prices in real time. Based on this, the system decides when to charge or when to switch to stored energy. The app takes local solar forecasts into account, learns from your usage habits, and creates a personalized energy plan, with prediction accuracy up to 94%.

Thanks to the built-in 24/7 AI Energy Assistant, you always have insight into your usage, generation, and savings. One tap in the app gives you a clear overview and helpful suggestions. You can adjust settings, control devices, or use voice commands. Whether you're looking to lower your energy bills or gradually reduce your reliance on the grid, the EcoFlow Stream Ultra adapts to your needs.