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EcoFlow DELTA Max Smart Extra Battery

Usual price €1.699,00
Usual price Selling price €1.699,00
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Double or triple the capacity of DELTA Max to reach 4032 Wh or 6048 Wh to extend the runtime of your main devices.


Double or triple the capacity of DELTA Max

To reach 4032 Wh or 6048 Wh and thus extend the operating time of your main appliances.

Charge anywhere, anytime

The DELTA Max Smart Extra Battery takes advantage of all available charging methods for DELTA Max. So you can charge it anytime, anywhere, as long as it's connected to DELTA Max. Once connected, both batteries charge and discharge simultaneously, so the charge percentage remains the same on both batteries.

Ready for any emergency

Get 1800W DC fast charging with EcoFlow Smart Generator (sold separately). You just need to connect the generator directly to your extra battery via the corresponding port. It works even when the unit is disconnected from your DELTA Max.

Always in the know

The smart extra battery has a bright LCD display on the front that gives you all the information you need. Entry, exit, remaining charge and remaining time.

Net Weight

Approx. 40 lbs (18 kg)

Charge Temperature

32 to 113°F (0 to 45°C)


24 months

Cell Chemistry


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 Input

50.4V, 1800W Max (X-Stream and solar dual charging)

Smart Generator

Supported (sold separately)


18.3 x 9.3 x 11.1 in (46.4 x 23.5 x 28.3 cm)

Discharge Temperature

-4 to 113°F (-20 to 45°C)



Cycle life

800 Cycles to 80%+ capacity

Testing and certification


Extra Battery Port Output

43V-58.4V 3200W Max