Add to cart
EcoFlow DELTA 3 Series Smart Extra Battery EcoFlow DELTA 3 Series Smart Extra Battery $358.95
Anker SOLIX BP3800 Expansion Battery for F3800 Anker SOLIX BP3800 Expansion Battery for F3800 $1,227.95
ecoflow|SKU:ZMR330EB

EcoFlow Delta 2 Smart Extra Battery — 1024Wh LFP Expansion Module

Double Your Off-Grid Energy Reserves

Doubles your storage — Expands DELTA 2 from 1024Wh to 2048Wh
Battle-tested LiFePO4 cells — Rated for 3,000 cycles to 80%+ capacity
No configuration needed — Plug directly into DELTA 2 and it works immediately
Compact stackable design — Secure stacking at 21 lb keeps your setup clean
Monitor from anywhere — Built-in screen and EcoFlow app show battery status
  • FREE System Design Consultation -- Our engineers size your system for your actual consumption
  • FREE Shipping -- Ships free to your door, no minimum threshold

$385.95

0 in stock

Add to Cart
EcoFlow Delta 2 Smart Extra Battery
EcoFlow Delta 2 Smart Extra Battery
$385.95

30-day money back · No restocking fee

🔒 100% Secure Checkout

Visa Mastercard American Express Apple Pay Google Pay Klarna Link by Stripe
Free Returns 30-day hassle-free returns.
Free Delivery Every order, every time.
Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • EcoFlow Delta 2 Smart Extra Battery
EcoFlow Delta 2 Smart Extra Battery
EcoFlow Delta 2 Smart Extra Battery — 1024Wh LFP Expansion Module
$385.95

Double Your Off-Grid Energy Reserves

Expand your off-grid energy reserves with the EcoFlow Delta 2 Smart Extra Battery. This 1024Wh LFP add-on doubles your DELTA 2 capacity to 2048Wh, delivering field-tested reliability for home backup, cabin setups, and grid-independent living. With over 3,000 charge cycles and a plug-and-play design, it stacks securely and charges in unison with your base unit. Monitor everything through the EcoFlow app or the built-in screen. Ships free.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
LFP Chemistry
1024Wh Capacity
Plug & Play Setup
3000 Cycle Life
1024Wh
Added Capacity
2048Wh
Total System Capacity
3,000+
Charge Cycles to 80%+
Stop Guessing at Runtime — Know Your Capacity

Stop Guessing at Runtime — Know Your Capacity

Most power failures outlast a single battery charge. You have probably been there — the grid drops, your fridge runs for six hours, then silence. The DELTA 2 Smart Extra Battery eliminates that uncertainty by doubling your storage to 2048Wh with a single plug-and-play connection. At Off Grid Vault, every expansion battery we carry is vetted for genuine compatibility with its host power station. No mismatched BMS protocols, no voltage surprises, no hoping it works. You plug it in, it charges in unison with your DELTA 2, and your runtime doubles immediately. That is the difference between guessing and knowing.

LiFePO4 Chemistry Built for the Long Haul

LiFePO4 Chemistry Built for the Long Haul

This is not a disposable power pack. The Delta 2 Smart Extra Battery uses LiFePO4 chemistry rated for 3,000 cycles to 80% or more capacity — that translates to years of daily use before meaningful degradation. The integrated Battery Management System monitors voltage, current, and temperature in real time. Whether this battery sits in your RV through summer heat or powers a cabin through winter cold, the LFP cells hold their charge and deliver consistent output. Recharge from 0-80% in 80 minutes via AC, or pair with portable solar panels for off-grid charging. The built-in screen and EcoFlow app give you full visibility on battery percent and remaining time from anywhere.

Stackable Design That Grows With Your Setup

Stackable Design That Grows With Your Setup

At 21 lb and measuring 15.7 × 8.3 × 11.1 in, the Delta 2 Smart Extra Battery is built to stack securely on top of your DELTA 2 power station — and on additional batteries if you need more capacity down the road. The ergonomic form factor eliminates cable clutter and keeps your power setup compact, whether it lives in an RV compartment, a cabin corner, or a garage backup station. Internal storage space for accessories means fewer loose parts to track. This is off-grid infrastructure that respects your floor space and scales when you need it to, without redesigning your entire system from scratch.

Compatibility Check

Make sure this expansion battery integrates with your existing setup before ordering.

  • Compatible only with EcoFlow DELTA 2 power station
  • Requires stacking space of at least 15.7 × 8.3 × 11.1 in
  • Adds 21 lb to your total system weight

Built For Real Scenarios

Where the Delta 2 Smart Extra Battery proves its worth.

Home Backup Power
Cabin & Off-Grid Living
RV & Van Trips
Extended Camping

Full specifications

At a glance

Dimensions
15.7 × 8.3 × 11.1 in
Full specifications6 data points across 4 categories

Dimensions

Weight21 lb
Dimensions15.7 × 8.3 × 11.1 in

Power & Performance

Capacity1024Wh
Cycle Life3000 cycles to 80+% capacity

Materials

Battery ChemistryLFP

Compliance & Warranty

Compatible WithDELTA 2

The Off Grid Vault Promise

What you get when you buy from us — no fine print.

Free ShippingShips free to your door — no minimums, no surprise freight charges.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
★★★★★
“Bought this to extend my Delta 2 for cabin weekends. Plugged it in, no fuss, and suddenly I was running my mini fridge, lights, and phone chargers for two full days without even thinking about it. The stacking design is solid — does not slide around in the truck. Exactly what I needed to stop worrying about runtime.”
F
First L.Prescott, AZ

Delta 2 Smart Extra Battery

The EcoFlow Delta 2 Smart Extra Battery expands the capacity of your EcoFlow Delta 2 Portable Power Station, doubling its energy storage from 1024Wh to 2048Wh for extended power on the go. Perfect for home backup, camping, RV trips, and off-grid living, this extra battery ensures longer runtimes for essential appliances and devices.

Featuring durable LiFePO4 battery chemistry, it offers a lifespan of over 3,000 cycles, delivering reliable and long-lasting performance. The intelligent Battery Management System (BMS) continuously monitors voltage, current, and temperature to maximize efficiency and safety.

Seamlessly integrating with the Delta 2, this plug-and-play expansion provides a simple way to increase your energy storage without extra complexity. Stay powered longer with the EcoFlow Delta 2 Smart Extra Battery, the perfect companion for uninterrupted energy independence.


Delta 2 Smart Extra Battery

EcoFlow Delta 2 Extra Battery Specs

  • Weight: 21 lb
  • Dimensions: 15.7 × 8.3 × 11.1 in
  • Capacity: 1024Wh
  • Battery Chemistry: LFP
  • Cycle Life: 3000 cycles to 80+% capacity
  • Compatible With: DELTA 2


EcoFlow Delta 2 Extra Battery Features

  • DELTA 2 and its Extra Battery charge and discharge in unison. Recharging from portable solar panels, AC outlets, or our Smart Generator is easy.
  • Featuring an ergonomic, compact design, the DELTA 2 Smart Extra Batteries can be securely stacked on top of power stations and each other to save space and minimize clutter.
  • DELTA 2 expands up to 2048Wh with smart extra battery, keeping your home powered on in any emergency.
  • Charge up with DELTA 2 from 0-80% in 80 minutes and 0-100% in 130 minutes with AC input.
  • Get extra storage for accessories conveniently, saving space at home or on the go.
  • DELTA 2 fits with every port you’ll ever need to power any devices anywhere, so you will always feel right.
  • Get all the same info about battery percent, remaining recharge time, hours left, and more on the built-in screen. You can check the battery’s status anywhere from the EcoFlow app.
  • 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 Smart Extra Battery with ease.
  • Charge up with DELTA 2 from 0-80% in 80 minutes and 0-100% in 130 minutes with AC input.
  • 1kWh expandable capacity to fit your energy storage needs, 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.


Your Satisfaction with EcoFlow is Guaranteed:

  • 10-Year Limited Warranty
  • Lowest Price Guarantee

Reviews

There are no reviews yet.

Be the first to review “EcoFlow Delta 2 Smart Extra Battery — 1024Wh LFP Expansion Module”

Your email address will not be published. Required fields are marked *

Frequently Asked Questions

No. The Delta 2 Smart Extra Battery is designed exclusively for the EcoFlow DELTA 2 power station. It will not work with DELTA 2 Max, DELTA Pro, or any other EcoFlow model. Off Grid Vault offers free system design consultation, so if you are unsure which expansion battery matches your power station, reach out and we will confirm the right fit before you purchase.
For most users, yes. Adding this 1024Wh expansion costs less than purchasing a second complete power station with its own inverter and casing — the product data notes up to 30% savings versus a standalone unit of equal capacity. You get the same 2048Wh total without redundant inverters, and the DELTA 2 manages both batteries as a single system. If your goal is more energy storage rather than more output ports, the expansion battery is the rational choice.
The LiFePO4 cells are rated for 3,000 cycles to 80% or more capacity. If you cycle the battery once per day, that is over eight years before it reaches 80% of original capacity — and it continues working beyond that point, just at reduced capacity. LiFePO4 is the same chemistry trusted in full-home off-grid battery banks. This is not a seasonal item; it is long-term energy storage.
No setup required. The Delta 2 Smart Extra Battery is plug-and-play — connect it to your DELTA 2 power station and both units charge and discharge in unison automatically. The EcoFlow app recognizes the expanded capacity and displays updated battery percent, remaining recharge time, and hours left. You do not need to change settings, pair Bluetooth, or adjust charge profiles. It works the moment you plug it in.
Off Grid Vault is an authorized EcoFlow dealer. If your expansion battery develops a defect outside our 30-day performance guarantee, the manufacturer warranty applies and we handle the claim on your behalf — you are not redirected to a ticket queue or left to figure it out alone. We stand behind every product we sell because our reputation depends on the equipment actually performing as specified. That is the difference between buying from a curated off-grid specialist and a generic marketplace.
Yes. When the Smart Extra Battery is connected to your DELTA 2, solar input goes into the power station and both units charge together as one system. The DELTA 2 handles all charge controller functions, so you connect your portable solar panels to the power station as you normally would. Both the 1024Wh base unit and the 1024Wh expansion recharge in unison from the same solar source.
At 21 lb, the Delta 2 Smart Extra Battery ships via standard parcel carrier — no LTL freight or appointment scheduling required. Off Grid Vault ships free on all orders with no minimum threshold. You will receive tracking information once the battery leaves our warehouse, and standard parcel delivery means it arrives at your door like any typical package.
SKU: ZMR330EB Category: Brand:

The Off Grid Vault Promise

What you get when you buy from us — no fine print.

Free Shipping Ships free to your door — no minimums, no surprise freight charges.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.

Related products

About ecoflow Expansion Batteries

ecoflow is a trusted manufacturer of premium expansion batteries. OffGridVault is an authorized dealer offering the full ecoflow lineup with free delivery, price match guarantee, and expert support.

View all ecoflow products →

Related Categories

AC/DC Enclosure 2 products Air Handlers 8 products Air Heaters 2 products Amp Hub 2 products Awnings 15 products Batteries 3 products
Join the Grill Island Community

Expert Picks, Straight to Your Inbox

No spam. Just the gear worth knowing about.

No spam. Unsubscribe anytime.