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Power station accessory comparison

EcoFlow DELTA 2 Max Extra Battery vs EcoFlow River 3 Plus Extra Battery

Compare capacity, output, charging and portability.

Compared products
01Selected
EcoFlow DELTA 2 Max Smart Extra Battery

EcoFlow DELTA 2 Max Smart Extra Battery

  • Power station type: expansion battery.
  • Base capacity: 2048Wh.
  • Charging through compatible host.
  • Home backup: compatible with DELTA 2.
  • Smart features: LCD: battery percentage, input and output power.
KSh 109,000Out of Stock
02
EcoFlow River 3 Plus Smart Extra Battery

EcoFlow River 3 Plus Smart Extra Battery

  • 140 W rated wired charging power.
  • Battery chemistry: liFePO₄ (LFP).
  • Output limits: 1× USB-C: 5V / 9V / 12V /.
  • 3000 cycles to 80%+ original capacity.
  • Pogo-pin stacking connection.
KSh 27,700In Stock
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Our quick verdict

The EcoFlow DELTA 2 Max is a replacement / Expansion Battery, while the EcoFlow River 3 Plus is an expansion battery with standalone USB-C input/output.

Charging

EcoFlow DELTA 2 Max
Charging through compatible host
EcoFlow River 3 Plus
140 W wired charging

Product type

EcoFlow DELTA 2 Max
Replacement / Expansion Battery
EcoFlow River 3 Plus
Expansion battery with standalone USB-C input/output

Key differences

The main differences to help you choose.

EcoFlow DELTA 2 Max

  • Product type: Replacement / Expansion Battery.

EcoFlow River 3 Plus

  • Product type: Expansion battery with standalone USB-C input/output.

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

2 priorities selected.
How each product answers the selected priorities
PriorityEcoFlow DELTA 2 MaxEcoFlow River 3 Plus
ChargingCharging through compatible host140 W wired charging
Product typeReplacement / Expansion BatteryExpansion battery with standalone USB-C input/output

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationEcoFlow DELTA 2 Max Smart Extra BatteryEcoFlow River 3 Plus Smart Extra Battery
BrandEcoFlowEcoFlow
ModelEcoFlow DELTA 2 Max Smart Extra BatteryRIVER 3 Plus Smart Extra Battery
Product typeReplacement / Expansion BatteryExpansion battery with standalone USB-C input/output

Battery & Charging

Battery & Charging specifications comparison
SpecificationEcoFlow DELTA 2 Max Smart Extra BatteryEcoFlow River 3 Plus Smart Extra Battery
Charging requirements—Bidirectional USB-C: 5V / 9V / 12V / 15V at 3A maximum; 20V / 28V at 5A maximum; 140W maximum; charging through a connected RIVER 3 Plus

Design & Package

Design & Package specifications comparison
SpecificationEcoFlow DELTA 2 Max Smart Extra BatteryEcoFlow River 3 Plus Smart Extra Battery
In the boxDELTA 2 Max Smart Extra Battery, extra battery cable, user manual and warranty card—

Additional specifications

Additional specifications specifications comparison
SpecificationEcoFlow DELTA 2 Max Smart Extra BatteryEcoFlow River 3 Plus Smart Extra Battery
Brand ModelEcoFlow DELTA 2 Max Smart Extra Battery; EFD350-EB—
Power Station TypeExpansion battery—
Capacity ExpansionBase capacity: 2048Wh Expansion: Compatible hosts: DELTA 2, DELTA Max 2000 and DELTA 2 Max—
Battery Cycle LifeChemistry: LiFePO₄ (LFP) Cycle life: 3000 cycles to 80%+ original capacity—
Dc OutputsProprietary extra-battery port: 51.2V DC; 3200W maximum battery output—
Other ChargingCharging through compatible host; extra-battery input: 51.2V DC, 2000W maximum; optional compatible EcoFlow Smart Generator—
Home BackupCompatible with DELTA 2, DELTA Max 2000 and DELTA 2 Max; DELTA 2 Max accepts up to two extra batteries—
Safety BmsBms: Yes Protection: Overvoltage, overload, overtemperature, short circuit, low temperature, low voltage and overcurrent Charging temperature: 0–45°C Discharging temperature: −10–45°C—
Smart FeaturesLCD: battery percentage, input and output power; EcoFlow app monitoring through compatible host—
Dimensions WeightDimensions: 464 × 235 × 283 mm Weight: 19 kg—
Physical FeaturesPortability: Carry handle; storage compartment Warranty: 5-year UK manufacturer warranty—

Electrical

Electrical specifications comparison
SpecificationEcoFlow DELTA 2 Max Smart Extra BatteryEcoFlow River 3 Plus Smart Extra Battery
Battery chemistry—LiFePO₄ (LFP)
Nominal voltage—22.4V nominal
Output limits—1× USB-C: 5V / 9V / 12V / 15V at 3A maximum; 20V / 28V at 5A maximum; 140W maximum
Cycle life and conditions—3000 cycles to 80%+ original capacity at 0.5C charge/discharge and 25°C

Compatibility & Safety

Compatibility & Safety specifications comparison
SpecificationEcoFlow DELTA 2 Max Smart Extra BatteryEcoFlow River 3 Plus Smart Extra Battery
Compatible devices—EcoFlow RIVER 3 Plus
Connections—Pogo-pin stacking connection; USB-C
Installation—Clip-on stacking; no interconnecting cable or screws required
Safety features—Overvoltage, overload, overtemperature, short-circuit, low-temperature, low-voltage and overcurrent protection
Operating temperature—Charging: 0–45°C; discharging: −10–45°C; storage: −10–45°C; optimal operating/storage temperature: 20–30°C

Similarities

  • Both are rated for 3,000 charge cycles.
  • Both are made by EcoFlow.

In summary

Get the EcoFlow DELTA 2 Max if you want a replacement / Expansion Battery, or the EcoFlow River 3 Plus if you want an expansion battery with standalone USB-C input/output.

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