Ecoflow Delta 2 Max extra battery
Expansion battery for the EcoFlow DELTA series.
- Capacity, LFP cells (model EFD350-EB)2048 Wh
- Add up to two units to expand DELTA 2 Max to
- 3,000 cycles to 80%+ capacity
- Extra battery port: 2,000W max input, 3,200W max output
- Net weight (approx.)19 kg
SKU: 421277
- Model
- EFD350-EB
- Weight
- Approximately 19 kg (42 lbs)
- Dimension
- 464 × 235 × 283 mm (18 × 9 × 11 in.)
- Capacity
- 2,048Wh
Key figures
2048 Wh
Capacity, LFP cells (model EFD350-EB)
19 kg
Net weight (approx.)
464 × 235 × 283 mm
Dimensions
Specifications
Ecoflow Delta 2 Max extra battery specifications
General Info
- Model
- EFD350-EB
- Weight
- Approximately 19 kg (42 lbs)
- Dimension
- 464 × 235 × 283 mm (18 × 9 × 11 in.)
- Capacity
- 2,048Wh
Battery Info
- Battery Type
- LFP
- Cycle Life
- 3,000 cycles to 80% + capacity
- Protection Type
- Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection
Input Ports
- Extra battery port input
- 51.2V⎓ 2,000W Max (X-Stream and solar dual charging)
Output Ports
- Extra battery port output
- 51.2V⎓ 3,200W Max
Operating Temperature
- Optimal Operating Temperature
- 20°C ~ 30°C (68°F ~ 86°F)
- Discharging Temperature
- -10°C ~ 45°C (14°F ~ 113°F)
- Charging Temperature
- 0°C ~ 45°C (32°F ~ 131°F)
- Storage Temperature
- -10°C ~ 45°C (14°F ~ 113°F) (Optimal: 20°C ~ 30°C (68°F ~ 86°F))
Source: ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com/cms/upload/1766714817894/EcoFlow%20DELTA%202%20Max%20Smart%20Extra%20Battery-User%20Manual%20V1.0%20(EN).pdf (angol), retrieved Aug 24, 2026
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