EcoFlow DELTA Max Smart Extra Battery


Frequently Bought Together

Even more capacity Pair 2x Smart Batteries with the DELTA Max and reach a staggering 6048Wh capacity

More power for longer

Intelligent charging Looking to recharge your Smart Battery? Connect your additional battery to DELTA Max whilst it's charging and add juice to your Smart Battery simultaneously.

Rapid emergency power By pairing your Smart Battery with the EcoFlow Smart Generator, you can get a 1800W DC rapid recharge. With that, you’ll be prepared in any emergency.

Be two steps ahead The front of the device is equipped with a smart LCD screen. This gives you real-time data on output and input levels, remaining battery life and the time left before recharge is needed.


Net Weight
Approx. 40 lbs (18 kg)
Charge Temperature
32 to 113°F ± 5°F (0 to 45°C ± 3°C)
Management Systems
BMS, Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection
Extra Battery Port Output
43V-58.4V 3200W Max
Shelf Life
1 year (after fully charging the device)
24 months
Dimension *
18.3 x 9.3 x 11.1 in (46.4 x 23.5 x 28.3 cm)
Discharge Temperature
-4 to 113°F ± 5°F (-20 to 45°C ± 3°C)
Cycle Life
800 Cycles to 80%+ capacity
Extra Battery Port Input
50.4V, 1800W Max (X-Stream and solar dual charging)
Cell Chemistry
Testing and certification
Smart Generator
Supported (sold separately)

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