Name: EcoFlow DELTA 2 Max Smart Extra Battery
Brand: EcoFlow
SKU: EFDELTA2MaxEB
Price: 949.0 USD
Availability: InStock
Rating: 5.0 (6 reviews)

by EcoFlow

EcoFlow DELTA 2 Max Smart Extra Battery

SKU: EFDELTA2MaxEB

Save $141.99

$1,090.99

$1,090.99 - $1,090.99

$1,090.99

$949.00

$949.00 - $949.00

$949.00

Availability:

in stock, ready to be shipped

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5-Year Warranty

Off Grid Stores is an authorized retailer of EcoFlow products. Because of this, we pass on EcoFlow's manufacturer warranty to you.

Product Highlights

Expandable capacity- Increase the capacity of DELTA 2, DELTA Max and DELTA 2 Max with an extra 2048Wh.
Triple power at up to 30% lower cost-2-6kWhexpandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to gain a capacity of 6144Wh. And it's up to 30% more affordable than a power station of the same capacity.
10-year lifespan with an LFP battery- Get 10 years of daily use until it hits 80% of its original capacity. Embrace the 3000+ charging cycles enabled by the LFP battery chemistry.
Easy to use- Plug-and-play without setup. And use the EcoFlow app to monitor and control the DELTA 2 Max Smart Extra Battery.

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Description

EcoFlow DELTA 2 Max Smart Extra Battery

Expandable capacity

Increase the capacity of DELTA 2 Max with an extra 2048Wh.

Triple the power

2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to gain a capacity of 6144Wh, ideal for home backup, RVing, outdoor adventures, and everyday use. Much more affordable, it costs up to 30% less than a power station of the same capacity.

10-Year Long-lasting LFP Battery

Durable, Safe, Lightweight

With its upgraded LFP battery chemistry, the DELTA 2 Max Smart Extra Battery has a lifespan of 3000 complete cycles until it reduces to 80% capacity. You'll get pretty much 10 years of power, even if you use it every day. That's 6× longer than other power stations with a similar capacity and output.

Easy to use

There's no setup. Just plug it into your power station for more energy storage. Using the EcoFlow app, you can charge and monitor the DELTA 2 Max Smart Extra Battery with ease.

Stackable, space-saving design

Featuring an ergonomic, compact design, the DELTA 2 Max Smart Extra Batteries can be securely stacked on top of power stations and each other to save space and minimize clutter.

Specifications:

EcoFlow DELTA 2 Max Smart Extra Battery

General info
Model	EFD350-EB
Weight	42lbs
Dimensions	18 in x 9 in x 11 in
Capacity	2,048Wh
Input Ports
Extra Battery Port Input	51.2V= 2000W Max
Output Ports
Extra Battery Port Output	51.2V=3,200W Max
Battery Info
Battery Type	LFP
Cycle Life	3,000 cycles to 820% + capacity
Protection Type	Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Temperature, Low Voltage Temperature, Overcurrent Protection
Operating Temperature
Optimal Operating Temperature	20°C - 30°C
Discharge Temperature	-10°C- 45°C
Charging Temperature	0°C- 45°C

PACKAGE INCLUDES

EcoFlow DELTA 2 Max Smart Extra Battery

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

Frequently Asked Questions

Which portable power station is compatible with the DELTA 2 Max Smart Extra Battery?

DELTA 2, DELTA Max, and DELTA 2 Max are compatible with the DELTA 2 Max Smart Extra Battery.

How many extra batteries can I use with a portable power station?

DELTA 2 supports only 1 extra battery while the DELTA Max and DELTA 2 Max support up to 2.

Can I charge the extra battery without connecting to a power station?

Yes. You can use a Smart Generator to charge an extra battery even when it's not plugged into a power station. All other charging methods require it to be connected to a power station.

What makes the Smart Extra Battery "Smart"?

This battery can be monitored and controlled on the EcoFlow app.

What battery does the product use?

It uses a high-quality LFP battery.

How do I know if the product is charging?

When it’s charging, the remaining charging time will be shown on the LCD Screen. Meanwhile, the charging indicator icon begins to rotate with the remaining battery percentage and the input power shown on the right of the circle.

How do I clean the product?

Please gently wipe it with a dry, soft, clean cloth or paper towel.

How do I store the product?

Before storing, please turn off the product first, and then store it in a dry, ventilated place at room temperature. Do not place it near water sources. For long-term storage, please discharge and recharge the product every three months to extend its battery life.

Can I take the product on a plane?

No.

Product Documents:

EcoFlow DELTA 2 Max Smart Extra Battery User Manual

Download Now >

Dependable on line store

I purchased the Delta Max 2 and then this smart extra battery to go with it from Off Grid Stores. Delivery was right on time and the ordering was convenient at their web site. They had the lowest price that I found and had no problems. I am very satisfied with the EcoFlow products and hoping for many years of usage.

5 Star Outfit

I ordered an EcoFlow Delta 2 max with 2 -400 watt solar panels. The merchandise was shipped as promised and the boxes arrived in great condition. These guys provide excellent products, knowledge and service. And, the price is right.

This is great addition to the ecoflow 2 max👍🏾

Ecoflow Delta 2 Max extra smart battery

Purchased my Delta 2 Max with 2 extra batteries and (2) 400 watt solar panels. . That just in case we had some type of an EMP or grid failure, that not only I, but also my wife, could handle the weight and easily set up the system. That after consultation with Tom Cormier of Off grid Stores, decided this system would work well for us. All components are in a Faraday cage charged up and ready for action. This was all to compliment my natural gas powered whole house generator and two smaller units. That should there be a long term event, then most likely the grid will be down, thus no natural gas, no gasoline for the other gen sets. That along with our other preps we feel this setup should sustain us for an extended event. Great peace of mind.

Delta2 max and delta 2 max smart extra battery

I work in a construction with no temporary power and this power bank help me a lot with charging my batteries and power for my microwave

1 2

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Date submitted: 04/19/2025
Reference number: 22463442707
Issue: Just bought 24 Volt 800 AH ALPHA 4 LITE battery
Issue description: Good Morning, Just bought the 8 battery 24 volt 800 Ah Alpha Lite Battery If you could help me with these settings that would help I am using the Outback FLEXMAX 80Question on the settings? Under the ChargerCurrent Limit is 80Absorbing (should be set at) ?Float (should be set at) ? In Advance Settings Absorb time limit ?Absorb End Amps ? Rebulk Voltage ? Thank youJames TroutmanCell

Great Transaction!

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Great value, even better service

I love this inverter, it has some nice features you won’t find in other similarly priced SRNE clones like a battery bus bar internally with space for two batteries and 2 inputs per MPPT that will run 2 strings in parallel for you, not to mention the breakers for grid in, AC out and battery.
Shipping was prompt and the OGS service was outstanding - I had a question on the order and they got back to me promptly and it was resolved without any hassle. Highly recommend buying the RUIXU SUNON10 from Off Grid Solar.

Good features and price

I looked at a lot of these type of portable fridges before landing on this one. It has all of the same features as models twice as expensive along with a name brand LG compressor inside. It doesn't seem to be as insulated as those pricier brands but that also means it's not quite as bulky but even so it still sips power. I tested it running of my battery pack and it will last all day. Super excited to get rid of melting ice!

Works

I ordered this cable and a solar panel later. Items came quickly and were as advertised. I would do business here, again