EcoFlow DELTA 2 Max Smart Extra Battery | Outbound Power
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EcoFlow DELTA 2 Max Smart Extra Battery

by EcoFlow
Original Price $1,599.00
Current Price $1,099.00

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EcoFlow DELTA 2 Max Smart Extra Battery Overview

Double the runtime of your EcoFlow DELTA 2 Max Portable Power Station with this add-on battery that plugs into any DELTA 2 Max. Add up to two DELTA 2 Max Extra Battery units for a total capacity of 6144Wh.

EcoFlow DELTA 2 Max Smart Extra Battery Features

Convenient Recharging

DELTA 2 Max and its Extra Battery charge and discharge in unison. Whether you’re recharging DELTA 2 Max from solar panels, AC outlets, a vehicle, the Dual Fuel Smart Generator, the DELTA 2 Max Extra Battery will recharge alongside.

Independent in Emergencies

The extra battery even recharges directly from EcoFlow’s Smart Generator without DELTA 2 Max. That’s more recharging options to fit any situation.

Easy to Use LCD Screen & EcoFlow App

Get all the info on battery percent, time until full, time until empty, and more on the DELTA 2 Max Extra Battery LCD screen. Check the battery’s status anywhere on the EcoFlow app.

What's In The Box

  • 1 x EcoFlow DELTA 2 Max Smart Extra Battery
  • 1 x EcoFlow DELTA 2 Max Extra Battery Cable
  • 1 x User Manual
  • 1 x Warranty Card

EcoFlow DELTA 2 Max Smart Extra Battery Specifications

Weight Approximately 19 kg (42 lb)
Dimensions 464 × 235 × 283 mm | 18 × 9 × 11 in
Capacity 2,048Wh
Extra Battery Port Input 51.2V 2,000W Max (X-Stream and solar dual charging)
Extra Battery Port Output 51.2V 3,200W Max
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
Optimal Operating Temperature 20°C–30°C (68°F–86°F)
Discharging Temperature -10°C–45℃ (14°F–113°F)
Charging Temperature 0°C–45°C (32°F–131°F)
Storage Temperature -10℃–45℃ (14°F–113°F) (Optimal: 20°C–30°C (68°F –86°F))

EcoFlow DELTA 2 Max Smart Extra Battery Manual

Customer Reviews

Based on 103 reviews
James B.
Great battery backup solution

Cant' say how grateful we are to have found Outbound Power and the EcoFlow Delta 2 Max battery backup solution. Powered our fridge/freezer and portable cooler wih plenty of leftover power (with the extra battery) for on/off power during a 16 hour power outage. Kept the living area cool and the food fresh as noo one wants to waste $400.00 worth of fresh food/meat. Service from Outbound Power and customer service is excellent, followed up after the sale to ensure we were satisfied. Highly recommended!


Ordered from Outbound Power, great customer service and good pricing. The 2 items connected together make the perfect solution to keep our home cool and fridge
/freezer running in 110 heat when the power went out for 10+ hours. Very happy with our purchase and the customer service!

Thanks so much for your kind review and of course we are happy you are satisfied with the Delta 2 Max. It was our pleasure to be of service!

david p.
Great value for the price

6000 plus watts delived for less than $3200 when i bought it. Works great.

Thank you for your review and we're pleased to learn this setup works great. We appreciate your business and please feel welcome to be in touch anytime if we can ever be of service!

Robbie T.
Excellent whole house backup system.

Two Delta Pro Ultras with a total of 12.28 kwh of battery powered the roof AC and all the appliances for 3 hour. Looking forward to adding more batteries in the future. Much better than a gas generator and doesn't make all the noise.

Outstanding! This is fantastic news and we could not be happier with your satisfaction with the Delta Pro Ultra. We are always available if we can ever be of service!

Patricia B.
So far, so good

We ordered one Ecoflow Delta Pro Ultra inverter and one battery a few weeks ago. We wanted to see how they performed and decide if it would be the right system for us. The inverter and battery did everything they were supposed to do and performed flawlessly. We are so pleased that we will be expanding our system with another inverter and battery (batteries) very soon.

We are thrilled to learn you are satisfied with your Delta Pro Ultra. It has been our pleasure to be of service and please feel welcome to contact us anytime if we can ever be of further assistance!