EcoFlow DELTA PRO [Smart Expansion Battery] | 3,600wH Capacity | Double Your Storage | 6,000 Lifecycles | 5-Year Warranty - ShopSolar.com

EcoFlow · Solar Generator

SKU: DELTAProEB-US

EcoFlow DELTA Pro Smart Extra Battery

4.9 126 owner reviews· 100% would recommend

This is an EcoFlow DELTA Pro Smart Extra Battery, an add-on that gives an existing DELTA Pro system up to 3,600Wh more LiFePO4 storage. It's sold as a battery only — no panels or inverter are included.

Capacity per battery 3,600Wh

Max batteries supported Up to 2 Smart Extra Batteries per DELTA Pro unit

Warranty 5-Year Extended Warranty

Bundle range 1 to 4 batteries, 3,600Wh–14,400Wh total

Choose this kit if…

You already own an EcoFlow DELTA Pro and want to add more storage capacity.
You want smart energy management and lower energy bills alongside backup power.
You need to cover extended blackouts that can last for days.

Your bundle

1 x Expansion Battery 3600Wh Doubling storage for an existing DELTA Pro

Also available:

Choose your bundle

Every kit includes the same power station, its cables, our setup guide and lifetime support. What changes is the solar.

1 x Expansion Battery$1,199.00Best for doubling storage for an existing delta pro3600Wh~~$2,999.00~~Out of stock

2 x Expansion Batteries$2,398.00Best for multi-day backup for larger homes or rvs7200Wh~~$5,299.00~~Out of stock

3 x Expansion Batteries$3,597.00Best for extended whole-home backup across several days10800Wh~~$7,599.00~~Out of stock

4 x Expansion Batteries$4,796.00Best for maximum expansion for long, sustained outages14400Wh~~$9,999.00~~Out of stock

	1 x Expansion Battery	2 x Expansion Batteries	3 x Expansion Batteries	4 x Expansion Batteries
Price	$1,199.00~~$2,999.00~~	$2,398.00~~$5,299.00~~	$3,597.00~~$7,599.00~~	$4,796.00~~$9,999.00~~
Panels & extras	3600Wh	7200Wh	10800Wh	14400Wh
Best for	Doubling storage for an existing DELTA Pro	Multi-day backup for larger homes or RVs	Extended whole-home backup across several days	Maximum expansion for long, sustained outages

1 x Expansion Battery $1,199.00~~$2,999.00~~

2 x Expansion Batteries $2,398.00~~$5,299.00~~

3 x Expansion Batteries $3,597.00~~$7,599.00~~

4 x Expansion Batteries $4,796.00~~$9,999.00~~

1 x Expansion Battery selected $1,199.00

Regular price: $1,199.00
Sale price: $1,199.00
Regular price: ~~$2,999.00~~

You save $1,800.00

Talk it through with our team · 877-242-2792

Orders processed in 24–48 hours

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30-day returns

Full manufacturer warranty

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Ships from the USA Warehouses in CA, TX and NY

Not sure which kit is right?

Tell us what you want to power and we will size the system with you, free, before and after you buy. The team picks up the phone Mon–Thu 10am–5:30pm and Fri 10am–1pm EST.

Get a free system proposal →info@shopsolarkits.com

“This makes my second one, slowly growing my Delta Pro system. We use it for our RV, so much better than a loud generator.”

Martin J. Verified owner

Frequently bought together

EcoFlow DELTA Pro Smart Extra Battery · 1 x Expansion Battery $1,199.00

In plain English

What that means for you

How long it lasts

What it can run

Charging speed

Moving it around

Room to grow

Scales are the ShopSolar team's read of the manufacturer's published specs.

John B.'s off-grid camp, running a travel trailer on the Hex Kit. “So far this system is living up to my expectations.”

Overview

Power that grows with you.

Double Your Capacity With The EcoFlow Delta PRO SMART EXTRA BATTERY.

This listing is for 1 x Delta PRO Smart Extra Battery.

For more information the Delta PRO, continue reading below...

Introducing the EcoFlow DELTA Pro

Introducing the world's first portable home battery with an expandable ecosystem for home backup, smart energy management, lower energy bills, and more. The EcoFlow DELTA Pro is the next leap in portable power technology, offering you power security and independence, wherever you are.

EcoFlow DELTA PRO 3,600wH / 3600W Portable Solar Generator Specs:

Capacity: 3600wH
Extra Battery: Delta Pro support up to 2 DELTA Pro Smart Extra Batteries / Smart Generators
AC Output Ports: 5 x AC Outlet, 3600W total (Surge 7200W)
Max Device(s) Power Supported by X-Boost: 4500W
DC Output: 2x USB-A 12W / 2x USB-A Fast Charge 18 W /
2x USB-C 100W / Car Power 126W /
2x DC5521 38W
Anderson Port: 12.6V 30A
AC Charging: 1800W Max, 120V-15A,
3000W Max, 240V-12.5A
Solar Charging: 1600W Max, 11-150V,13A
Car Charging: Support 12V / 24V Battery
Battery Chemistry: LiFePO4
Cycle Life: 6,500 Cycles to 50% Capacity
3,500 Cycles to 80% Capacity
Connection: Wi-Fi / Bluetooth / Wired
Dimension: 25 x 11.2 x 16.4 in / 63.5 x 28.5 x 41.6cm
Net Weight: Approx. 99 lbs / 45 kg
Warranty: 5-Year Extended Warranty

CAPACITY

From tailgate power to extreme blackouts that last for days on end, DELTA Pro delivers up to 25kWh of capacity. With that, you're covered for any situation. That's the industry gold standard.

AC Output

A single DELTA Pro unit offers an AC output up to 3600W, which can be expanded up to 4500W with X-Boost. This allows you to power window air conditioners, washing machines, and other devices.

If you’re looking for more power during an outage, you can connect two DELTA Pro units to the Smart Home Panel. This method gives you up to 7200W through your home circuits and provides power for 240V devices.

For US, preset wiring required to reach 240V

Or, for another option, connect two DELTA Pro units together with the Double Voltage Hub* to get 7200W, 240V to power heavy-duty devices. That’s enough power for your electric heaters, dryers, and other heavy-duty devices.

Only applicable for the US and Japan.

Charging Methods

DELTA Pro is the world’s fastest charging portable power station. Multiple charging delivers record-breaking speeds at 6000W. To reach 6000W, you can opt for one of these multiple charging methods.

Fully charge in 1.8 hours.

EcoFlow’s X-Stream charging technology isn't just fast, it's safe too. The battery management system ensures safety and longevity while you fully charge DELTA Pro from a standard AC wall outlet in 1.8 hours. DELTA Pro also has an adjustable AC charging speed from 200-3000W that gives you a flexible charging option.

Still have questions? Give us a call at 877-242-2792

Choose your kit

Build it around how you'll use it.

Every kit starts with the same power station. What changes is the panels, and whether it connects to your home.

Pick your starting point Choose the power station on its own if you already have panels, or a kit if you are starting from scratch.
Match the panels to your life Folding panels pack away for the RV and campsite. Rigid panels suit a cabin, shed or backyard. The transfer switch connects to your home.
Let us help you set it up Every order comes with our setup guide and lifetime support from the team, before and long after delivery.

1 x Expansion Battery $1,199.00~~$2,999.00~~

2 x Expansion Batteries $2,398.00~~$5,299.00~~

3 x Expansion Batteries $3,597.00~~$7,599.00~~

4 x Expansion Batteries $4,796.00~~$9,999.00~~

Every bundle compared side by side
	1 x Expansion Battery	2 x Expansion Batteries	3 x Expansion Batteries	4 x Expansion Batteries
Price	$1,199.00~~$2,999.00~~ Save $1,800.00	$2,398.00~~$5,299.00~~ Save $2,901.00	$3,597.00~~$7,599.00~~ Save $4,002.00	$4,796.00~~$9,999.00~~ Save $5,203.00
Panels & extras	3600Wh	7200Wh	10800Wh	14400Wh
Best for	Doubling storage for an existing DELTA Pro	Multi-day backup for larger homes or RVs	Extended whole-home backup across several days	Maximum expansion for long, sustained outages

Owner stories

Real homes, cabins and campsites. Their photos, their words.

4.9 126 reviews

100% would recommend

Quality 4.96 / 5

Easy to Use 4.81 / 5

“This was a great ad on for my Delta pro it double my run time.”

Charles S.Verified owner

“EcoFlow DELTA PRO PLUS EXPANSION BATTERY are the perfect pair.”

Bill T.Verified owner · Expansion Battery

“Great value, i love my Ecoflow delta pro set up. Great peace of mind having it in addition to my genset.”

Johnny A.Verified owner

Lifetime support

Real people, for the life of your system.

You get free, direct access to our support team by phone, email and chat. Whether it's setup guidance next week or troubleshooting years down the road, we're here to help.

877-242-2792Mon–Thu 10am–5:30pm · Fri 10am–1pm EST

Live chatAvailable now

info@shopsolarkits.comFor in-depth guidance

FAQ

Questions, answered.

Can't find what you need? The team is a phone call away.

Call 877-242-2792

Can you help with system sizing and design?

Yes. Our team can help you choose the right solar kit based on your goals, power needs, and location. We provide personalized guidance before and after your purchase at no additional cost.

Are your systems DIY-friendly?

Many of our customers complete the majority of installation themselves using our diagrams and support resources. For final electrical connections, a licensed electrician may be required depending on local codes.

Do you offer installation services?

While we do not directly install systems, we can help connect you with qualified local professionals and provide technical documentation to support your installer.

How does shipping and fulfilment work?

Our team works hard to process all orders within 24-48 hours. Most products ship directly to your door using the quickest, most cost effective ground shipping services depending on size. You'll receive tracking details and delivery coordination as soon as your order ships. Our average shipping times are anywhere from 3-7 days.

What is your return policy?

Our return policy is normally 30 days. If you have specific questions about returns, eligibility, or specific product conditions, you can learn more in our help center.

How do warranties work?

All products are backed by full manufacturer warranties. In addition, our team provides free lifetime technical support to assist you throughout the life of your system.

Do you offer financing?

Yes! We offer a variety of flexible payment plans to fit any budget. Options include monthly financing with competitive interest rates, and some plans require no money down. You can apply during checkout and get approved in minutes.