Skip to content
Cart (0 item)

Your cart is empty

truck
In Stock Get yours today!
truck
7+ sold In the last 7 days
geo locate icon
Deliver to -

Fetching location...

truck
Free Returns Free Returns within 30 Days of Purchase
trust
Lifetime Customer Support Unlimited lifetime support, always available.

In Stock
SKU EFDELTA2MaxEB
by EcoFlow

EcoFlow DELTA 2 MAX [Smart Expansion Battery] | Expand Storage Capacity

Current price $1,399.00
Original price $1,749.00
Translation missing: en.product_price.item.price.range_html
Original price $1,749.00
from $1,399.00
Current price $1,399.00
You Saved: $350.00 20%
form icon Financing Applications at Checkout

EcoFlow DELTA 2 MAX [Smart Expansion Battery] | Expand Storage Capacity
form icon Request a Free Quote
Support Agent

Need Help? We're Here for You!

If you need help, we're here to assist you whether you're facing issues, have questions, or need clarification.

truck
In Stock Get yours today!
truck
10+ sold In the last 7 days
geo locate icon
Deliver to -

Fetching location...

truck
Free Returns Free Returns within 30 Days of Purchase
trust
Lifetime Customer Support Unlimited lifetime support, always available.

EcoFlow DELTA 2 Max Smart Extra Battery

EcoFlow DELTA 2 Max Smart Extra Battery has an expandable capacity. Increase the capacity of DELTA 2 Max with an extra 2046Wh.

  • Triple the power - 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to hit a capacity of 6144Wh. Ideal for home backup, RVing, outdoors or even everyday use.
  • Built to last 6× longer - Get 10 years of daily use until hitting 80% of its original capacity. That’s down to its LFP battery chemistry giving you 3000+ cycles.
  • 5-Year Warranty

What’s Included With Your Order?

  • Extra Battery Cable
  • User Manual
  • Warranty Card 
  • Free Shipping
  • Lifetime Customer Support (Email, Live Chat & Phone)

Expandable capacity

Increase the capacity of DELTA 2 Max with an extra 2046Wh.

Triple the power

2-6kWh expandable capacity to fit your energy storage needs. Add up to two EcoFlow DELTA 2 Max Smart Extra Battery to hit a capacity of 6144wh. Ideal for home backup, caravanning, outdoors or even everyday use.

10-Year Long-lasting LFP Battery

Durable, Safe, Lightweight

With its upgraded LFP battery chemistry, DELTA 2 Max 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.

LFP Battery Chemistry

That's 6× longer than other power stations with a similar capacity and output.

Advanced BMS Protection

A built-in battery management system regulates vitals, including voltage, current, and temperature, keeping DELTA 2 Max safe, secure, and built to stand the test of time.

Robust Design

Made with a sturdy one-piece design, DELTA 2 Max is designed for the rough and tumble of portability. Each port is reinforced, protecting them against wear and tear.

Upgraded Tech, Lighter Weight

Even with its upgraded LFP battery, DELTA 2 Max is still 30% lighter than similar power stations on the market.

Run 99% of Appliances with X-Boost

Power pretty much anything with up to 3400W Output

DELTA Max powers almost all the devices you need with a large 2400W AC output. With X-Boost proprietary technology, run appliances with an output of up to 3400W. Compared with similar portable power stations, DELTA 2 Max can power more devices while also preventing overloading and overheating.

120V Home Backup: Power through outages

Power your essential appliances with a hefty 2400W AC output by connecting DELTA 2 Max (2kWh) and up to two Smart Extra Batteries (6kWh) with your home's transfer switch for partial home backup. With a plug-and-play design, it's easier than ever to prepare for blackouts.

Power for the entire family

2048Wh Capacity

A generous 2048Wh capacity makes DELTA 2 Max ideal for home backup, running your essentials for hours. Using your transfer switch, or plugged in directly, keep your fridge on and stop food from spoiling for up to 14 hours. With its lightweight design, DELTA 2 Max is portable enough to grab and go on the next camping trip.

Experience the world's fastest 43 minute recharge

Fuel Up 80% in Only 43 Mins*

With DELTA 2 Max's upgraded tech, combine up to 1000W solar input with AC for world-leading charging speeds. In only 43 min get an 80% charge. Or stick with AC for an 80% charge in a speedy 1.1 hour.

*When combined solar and AC input is 2400W.

99% MPPT Efficiency

Maximise solar generation during daylight hours

EcoFlow's smart (MPPT) algorithm automatically detects voltage and current in real-time to give you optimum solar generation throughout the day, even during cold and cloudy days. With a solar input of 1000W, connect up to 2 EcoFlow 400W Portable Solar Panels or 4 sets of 220W Bifacial Solar Panels.

EcoFlow DELTA 2 Max Smart Extra Battery Specs

  • Capacity 2048Wh
  • Input Port 51.2V, 2000W Max
  • Output Port 51.2V, 3200W Max
  • Battery LFP chemistry, 3000 cycles to >80% capacity
  • Dimension 464 × 235 × 283 mm (18 × 9 × 11 in)
  • Weight 19kg (42lbs) 
  • Compatible with DELTA 2 / DELTA Max 2000/ DELTA 2 Max

Still Have Questions? Give us a call today 1-877-242-2792

average rating 5.0 out of 5
Based on 1 review
  • 5 Stars
    1 Review
  • 4 Stars
    0 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
Quality
Rated 5 out of 5
Easy to Use
Rated 5 out of 5
1 Review
Reviewed by Lynne L.
Verified Buyer
I recommend this product
Age Range
65+
Rated 5 out of 5
Review posted

Very informative help in selecting my new Ecoflow battery

My item arrived quickly and was packaged very well. I've wanted this for a long time. Now I'm saving for another one. I recommend this item. I've been pleased with all my Ecoflow purchases. And will buy from Shop Solar again. Very informative about their products.

Loading...
Quality
Rated 5 out of 5
Easy to Use
Rated 5 out of 5
Was this helpful?

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Shop Solar. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

  • Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer
  • You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Shop Solar Kits equipment, we’ve got you covered: we’re always only a phone call or email away.

Top Solar Company in the USA

Top Solar Company in the USA

The prestigious ranking by Consumer Affairs is based on comprehensive evaluations, including ratings and reviews, equipment options, support services, pricing transparency, warranties, and various other factors. Among the top 6 nominated companies, Shop Solar stands out with the highest review rating, reaffirming its dedication to customer satisfaction and product quality.

Best Components, Lowest Prices

Best Components, Lowest Prices

We cut out the bloat of traditional solar companies and pass those savings off to you. Plus, we provide free shipping on all solar kits and lifetime customer service on everything we sell.

Expert Guidance

Expert Guidance

Our team of solar professionals is here to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.

peace-of-mind-1920x1080-c874049a-fa25-466b-a469-5f56a430914e-659x371_krfw.jpg

We’re people just like you

We’re not corporate and neither are our customers. We’re just a group of 50+ solar enthusiasts who are passionate about providing an honest, no-BS way for anyone, anywhere to improve their lives and the world around them with solar power.

Trusted Solar Authority

Trusted Solar Authority

With over 40,000+ happy customers, 2,500+ positive reviews, and decades of experience in the industry, we’re proud to say we’re America’s #1 solar power solutions provider. You can trust us to provide you with top-notch products and legendary customer service at every step of the way.

piggy bank

Prepare for Anything

From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.

lighting bolt

Solar Power Made Easy

Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.

solar cable

Secure Your Independence

Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.

Solar That Makes Sense - DIY+

Why pay more when you can go solar your way? With our DIY+ model, you become the master of your own solar project - we call it being your own general contractor, using our seasoned technicians to help guide you at every turn. So you can skip the high-commission salespeople and source your own top-tier equipment from us, and if you need a professional installer, we can help with that too. It’s solar, but smarter and more rewarding—because who said going green couldn’t also save you some green?

Solar Power, Your Way - Expert Guidance Included

Icon representing sun

Become Your Own Solar Contractor with Our DIY+ Program

Icon representing sun

Save Thousands with Our DIY Solar Kits and Support

Icon representing sun

Go Green and Save Green with Our Do-It-Yourself Solar Solution

Icon representing sun

Solar Power, Your Way - Expert Guidance Included

Icon representing sun

Become Your Own Solar Contractor with Our DIY+ Program

Icon representing sun

Save Thousands with Our DIY Solar Kits and Support

Icon representing sun

Go Green and Save Green with Our Do-It-Yourself Solar Solution

Icon representing sun

Why Choose Shop Solar

What To Expect - Complete Kits

We've been providing America and Canada with complete solar kits since 2018. Our mission is to make solar simple, which is why our complete packages contain every part and piece that you'd ever need. Designed by our expert solar and electrical engineers, we can have the entire kit shipped to your door. All of our kits come with diagrams and videos along with a lifetime of customer support.

Top Solar Company in the USA

The prestigious ranking by Consumer Affairs is based on comprehensive evaluations, including ratings and reviews, equipment options, support services, pricing transparency, warranties, and various other factors. Among the top 6 nominated companies, Shop Solar stands out with the highest review rating, reaffirming its dedication to customer satisfaction and product quality.

Best Components, Lowest Prices

We cut out the bloat of traditional solar companies and pass those savings off to you. Plus, lifetime customer service on everything we sell.

Expert Guidance

Our team of solar professionals is here to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.

We’re people just like you

We’re not corporate and neither are our customers. We’re just a group of 50+ solar enthusiasts who are passionate about providing an honest, no-BS way for anyone, anywhere to improve their lives and the world around them with solar power.

Trusted Solar Authority

With over 40,000+ happy customers, 2,500+ positive reviews, and decades of experience in the industry, we’re proud to say we’re America’s #1 solar power solutions provider. You can trust us to provide you with top-notch products and legendary customer service at every step of the way.

What to Expect - Solar Panels

Get to know the top-tier solar panels included in your kit. These panels are designed to deliver consistent & reliable performance, ensuring your system powers your needs with ease.

What to Expect - Batteries

Learn about the high-quality batteries included in every solar kit, designed to provide reliable energy storage for all your needs. These batteries ensure your system delivers consistent power when you need it most.

arrow
arrow

Go Solar Now, Pay Later

At ShopSolar you, we offer a wide variety of payment plan options to meet each customer's needs.

affirm logo paytomorrow logo
form icon

Quick and Easy Application

Fill out a short application and we will match you with multiple payment plan options instantly - Survey at checkout!

cheque icon

Poor Credit or No Credit?

Don’t sweat it. We welcome all credit scores and having a credit score is not required for approval.

money icon

No Money Down Today

Some payment plans offer as little as no money down, if you qualify.*` - Survey at checkout!

How we compare to the others!

Tired of the costly and complicated traditional solar sales model? At ShopSolar.com, we streamline the process with our digital-first platform, offering one-click complete solar power solutions that save you up to 50%, often including batteries, for true energy independence. Join over 45,000 satisfied customers enjoying affordable solar energy. Start your journey towards saving thousands at ShopSolar.com today!

Local Installer
Other Online Retailers
shop solar logo
Best for You Systems
cross
cross
tick
Transparent Pricing
cross
tick
tick
Installation Guidance
tick
cross
tick
Lifetime Customer Support
cross
cross
tick

Customer Success Stories

TP

Troy P

star star star star star

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

JB

Jacob B

star star star star star

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Shop Solar team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Shop Solar.

PB

Patrick B

star star star star star

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Shop Solar on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

JM

James Martin

star star star star star

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Shop Solar. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Shop Solar Kits.

BH

Brian H

star star star star star

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go. ShopSolar's Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

KS

Keith S

star star star star star

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

CA

Coll A

star star star star star

Great Experience

My experience with Shop Solar has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

TP

Troy P

star star star star star

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

JB

Jacob B

star star star star star

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Shop Solar team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Shop Solar.

PB

Patrick B

star star star star star

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Shop Solar on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

JM

James Martin

star star star star star

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Shop Solar. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Shop Solar Kits.

BH

Brian H

star star star star star

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go. ShopSolar's Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

KS

Keith S

star star star star star

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

CA

Coll A

star star star star star

Great Experience

My experience with Shop Solar has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Shop Securely, Trusted Supplier, 100% Satisfaction

Icon representing sun

Trusted Company, Real Products, Lifetime Support

Icon representing sun

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Icon representing sun

Manufacturer Warranty, Exceptional Service

Icon representing sun

Shop Securely, Trusted Supplier, 100% Satisfaction

Icon representing sun

Trusted Company, Real Products, Lifetime Support

Icon representing sun

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Icon representing sun

Manufacturer Warranty, Exceptional Service

Icon representing sun

Be Smart, Buy From an Authorized Dealer

When you choose us, you’re investing in real products from a trusted company with established supplier relationships. Enjoy peace of mind with 100% manufacturer warranty coverage and lifetime customer support. In an age where online shopping is fraught with risks, it’s crucial to avoid fly-by-night websites that skirt regulations. Shop with confidence, knowing you’re getting genuine quality and reliable service.

checkmark Instant Access
checkmark Easy to follow videos
checkmark Lifetime Updates

SOLAR + STORAGE MINI COURSE

We get it—solar can be confusing, especially if you're diving in for the first time. Which is exactly why we created this short, no-fluff solar mini course. In just 60 minutes, you'll learn everything you need to know to size, install, and optimize your very own solar power system—no confusing jargon or technical overwhelm.
75% OFF TODAY | LIMITED TIME ONLY.

Get Started
Solar Course

Get a Complimentary Solar Proposal Today!

$150 Value - Free Offer (Limited Time Only!) No Strings Attached. Totally Free. Takes Less than 2 Minutes.

Start Now