
EcoFlow · Batteries
Works with
DELTA 3 Max / DELTA 3 Max Plus / DELTA 3 Ultra Plus
EcoFlow DELTA 3 Max Plus Smart Extra Battery (2048 Wh): compare specifications and model compatibility. View expansion battery details, photos and support information at 326energy.
Use
The EcoFlow DELTA 3 Max Plus Smart Extra Battery adds 2,048 Wh of next-generation LiFePO4 storage to your EcoFlow DELTA 3 Max, DELTA 3 Max Plus, or DELTA 3 Ultra Plus system, doubling a 2 kWh station to 4,096 Wh or scaling further with dual expansion modules.
Engineered in a low-profile 35.3 lb (16 kg) stackable enclosure, the battery links directly via the XT150 Extra Battery Cable and synchronizes charge, discharge, and cell-health telemetry in real time through the host station's display and the EcoFlow mobile app.
Compatibility
Highlights
In the box
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Works with: RIVER 3 Plus
Adds 286 Wh of LiFePO4 capacity to the RIVER 3 Plus (572 Wh total) via cable-free Pogo Pin stacking. Rated for 3,000+ cycles to 80% capacity and includes a 140W bidirectional USB-C port for standalone charging and device power.

Works with: RIVER (original)
Doubles the original EcoFlow RIVER capacity from 288 Wh to 576 Wh. Bolts directly to the underside of the first-generation RIVER chassis with the included hardware for a single-handle, cable-free setup.

Works with: RIVER 3 Plus
Adds 572 Wh of LiFePO4 capacity to the RIVER 3 Plus, tripling total system storage to 858 Wh. Clips beneath the station via wireless Pogo Pin contacts and features a built-in 140W bidirectional USB-C port for standalone use.