Expandable capacity - Increase the capacity of DELTA 2, DELTA Max, and DELTA 2 Max with an extra 2016Wh.

Triple power at up to 30% lower cost - 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA Max Smart Extra Batteries to gain a capacity of 6048Wh. And it's up to 30% more affordable than a power station of the same capacity.

Easy to use - Plug-and-play without setup. And use the EcoFlow app to monitor and control the DELTA Max Smart Extra Battery.

Triple power & save up to 30% on costs - 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA Max Smart Extra Batteries to gain a capacity of 6048Wh, ideal for home backup, RVing, outdoor adventures, and everyday use. Much more affordable, it costs up to 30% less than a power station of the same capacity.

Stackable, space-saving design - Featuring an ergonomic, compact design, the DELTA Max Smart Extra Batteries can be securely stacked on top of power stations and each other to save space and minimize clutter.

5-Year Full Warranty - With one of the most comprehensive warranties in the industry, we go the extra mile to give you peace of mind.