The Eleven Energy Sodium Battery System is the UK’s first fully integrated sodium-ion home storage solution, combining a powerful 6 kW hybrid inverter, modular sodium battery packs, and intelligent energy management software.

Unlike lithium-ion, our sodium batteries are made from abundant, non-toxic materials sustainably sourced from seawater — making them an eco-friendly and ethical choice. They deliver reliable performance from -20 °C to 55 °C, ensuring year-round resilience in both cold winters and hot summers.

Our expandable 4.5 kWh sodium battery packs provide over 33 kWh of usable capacity per system, with up to 95% depth of discharge and 10-year warranty. The 6 kW hybrid inverter offers 98% efficiency, 9 kW solar input, and seamless switchover between on-grid and off-grid power.

At the heart of the system is the Eleven Energy App, an intelligent platform that integrates solar, EV charging, heat pumps, and smart appliances. It optimises energy use with solar forecasting, smart tariffs (including Agile Octopus), and UK-hosted secure data.

With Eleven, your home becomes smarter, greener, and more energy independent.