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While we offer shipping for EcoFlow products to Hawaii and Alaska, EcoFlow does not provide after sales services in those regions. Therefore we kindly recommend buying a CPS Accidental Warranty when shipping to Hawaii or Alaska.
Ecoflow Delta Pro Smart Extra Battery
This add-on battery connects with a DELTA Pro to double total capacity to 7200Wh. Connect two of them to DELTA Pro for a staggering 10.8kWh to use off-grid.
Recharging from solar panels, AC outlets, EV charging stations, or our Smart Generator is easy. Plug the Extra Battery into DELTA Pro and they will recharge and discharge in tandem.
The Extra Battery can be integrated to your home’s wiring when connected to DELTA Pro. These battery units become part of your home’s peak shaving and emergency power solutions.
This Extra Battery can recharge directly from EcoFlow’s Smart Generator outdoors, giving you another option for emergencies.
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.

Charge anytime, anywhere.
DELTA Pro’s Smart Extra Battery benefits from all the charging methods DELTA Pro has, including 6500W MultiCharge. That means you can charge anytime, anywhere as longas your extra battery is connected to DELTA Pro. Once connected, they’ll charge/discharge in unison, keeping the battery percent level across both units.
Note: This product is exclusively for the Delta Pro Portable Power Station.

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1x DELTA Pro Smart Extra Battery
1x DELTA Pro Extra Battery Cable
1x Handle Cover
1x User Manual
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Model Name
DELTA Pro Smart Extra Battery
Capacity
3600Wh
Battery Chemistry
LFP
Battery Cycle Life
6,500 cycles to 50% capacity, 3,500 cycles to 80% capacity
Shelf Life
1 year (after a full charge)
Dimension
25 x 11.2 x 16.4 in / 63.5 x 28.5 x 41.6 cm
Weight
Approx. 84lbs / 38kg
Warranty
5 years
Shipping Policy
Thank you for shopping with Offgrid Outlook. We're dedicated to delivering your orders quickly and reliably. Below are the details about our shipping process and policies:
Shipping Costs:
Enjoy free shipping within the USA.
Order Processing Time:
Orders are typically processed within 1-2 business days.
Order Transit Time:
Your order will usually arrive within 4-7 business days.
Shipping Methods:
Most orders are shipped through our third-party freight carriers using 18-wheeler trucks. If your order requires freight shipping, we will reach out to schedule a curbside delivery appointment. Please provide a valid phone number at checkout to ensure smooth delivery coordination.
Order Confirmation and Tracking:
After placing your order, you will receive a confirmation email verifying that your order has been received and your payment is approved. Once your order is shipped (usually within 1-2 business days), you’ll receive a shipment notification with a tracking number and link to follow your package’s progress.
Can I Change My Address?
If you need to update your shipping address, please contact us within 24 hours of placing your order.
Cancellations:
You may cancel your order at any time before it has been dispatched. If your order has already been shipped, please refer to our refund policy for further details.
Damages and Issues:
Please inspect your items upon receipt. If your order arrives damaged, defective, or incorrect, contact us right away so we can assess the issue and take corrective action. We will cover return shipping for damaged or incorrect items.
Contact Us:
We value your trust and strive to provide the best shipping experience possible. If you have any questions or need assistance, please don’t hesitate to reach out to our customer service team.
We are committed to providing the best prices online. If you find a lower price from another store, let us know, and we’ll beat it without hesitation. Our goal is to ensure you feel confident that you're getting the best deal on the product you're purchasing.
Our 100% Price Match Guarantee comes with the following conditions:
Promotions like rebates and buy one, get one free offers are not eligible.
The competitor’s website cannot be a discount or auction site (e.g., eBay, etc.).
The competitor must be an authorized retailer of the item you're buying.
The price match will factor in the item price, sales tax, and shipping fees.
Price matches do not apply to exchange orders or replacements.
Please note, some exclusions may apply.
Return Policy
We offer a 30-day return window, meaning you have 30 days from the date you receive your item to request a return.
Return Eligibility:
To qualify for a return, the item must be in the same condition as when you received it—unused, unworn, with all tags attached, and in its original packaging. A receipt or proof of purchase is also required.
Return Process:
To initiate a return, please email us at support@offgridoutlook.com. If your return is approved, we will provide you with instructions on how and where to send the item. Please note that items returned without prior approval will not be accepted.
Return Shipping Costs:
If you’re returning an item because you changed your mind, you will be responsible for the return shipping costs. However, if the item is defective or incorrect, we will cover the return shipping expenses.
Restocking Fee:
Yes, we charge a 25% restocking fee for returned items.
Return Shipping Costs:
For defective products, we will pay for the return shipping. If the return is for any other reason (e.g., customer remorse), you are responsible for the shipping cost.
Return Method:
We only accept returns via mail.
Return Shipping Label:
For damaged or defective items, contact us, and we will send you a return label via email. You can then download and print the label to use for your return.
Refunds:
Once we receive and inspect your returned item, we will send an email to confirm that your return has been processed. If your return is approved, a refund will be applied to your original payment method within 3-5 business days.
Late or Missing Refunds:
If you haven't received your refund yet, please first check your bank account. Then, reach out to your credit card company, as it may take some time for the refund to post. After that, contact your bank as there might be a processing delay. If you still haven’t received your refund, contact us at support@offgridoutlook.com.
Damages and Issues:
Please inspect your order immediately upon receiving it. If the item is defective, damaged, or if you received the wrong item, contact us right away so we can assess and resolve the issue.
Exchanges:
We only offer exchanges for defective or damaged items. If you need to exchange your item for the same one, please email us at support@offgridoutlook.com.
Changing Shipping Address:
If you need to change the shipping address, contact us within 24 hours of placing your order.