EF ECOFLOW Extra Battery for Delta Pro Ultra&Delta Pro Ultra X, Lifepo4 Battery Backup for Home Use, Emergency, Camping, RV
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 10 left in stock, order soon!
Arrives
May 9 – May 13
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Style: DELTA Pro Ultra Battery
Features
- Expandable Capacity. The rated capacity of one battery is 6144Wh. To expand capacity for powering your appliances or backing up your whole home, one can connect up to 5 batteries to an inverter or up to 15 batteries to 3 sets of inverters, which makes the total capacity add up to about 30kW to 90kW.
- Constant Use for over 10 Years. DELTA Pro Ultra supports LFP battery which provides 3500 cycles till it lowers to 80% capacity. Thats almost 10 years of regular use. Every battery houses an integrated BMS module to regulate its voltage current, and temperature, keeping it safe,secure, and long-lasting.
Brand: EF ECOFLOW
Wattage: 7200 watts
Fuel Type: Electric
Power Source: Battery Powered
Recommended Uses For Product: Camping, Commercial, Residential
Item Weight: 111.8 Pounds
Voltage: 120 Volts
Output Wattage: 7200
Special Feature: Expandable Capacity, LFP Battery
Included Components: DELTA Pro Ultra Battery, EcoFlow Battery Connection Cable
Wattage: 7200 watts
Fuel Type: Electric
Power Source: Battery Powered
Recommended Uses For Product: Camping, Commercial, Residential
Voltage: 120 Volts
Output Wattage: 7200
Additional Features: Expandable Capacity, LFP Battery
Engine Type: Battery-based
Runtime: 720 hours
Total Power Outlets: 1
Starting Wattage: 7200 Watts
Running Wattage: 7200 Watts
Item Weight: 111.8 Pounds
Item Dimensions L x W x H: 26"L x 18"W x 8"H
Brand Name: EF ECOFLOW
Included Components: DELTA Pro Ultra Battery, EcoFlow Battery Connection Cable
Model Name: DELTA Pro Ultra Extra Battery
Model Number: EFYJ751-BP
UPC: 842783132925
Manufacturer: EcoFlow
Item Type Name: portable power station
Warranty Description: 5 year manufacturer
Color: Silver
Material Type: Lithium Iron Phosphate (Lfp), Steel, Aluminum
EU Spare Part Availability Duration: 10 Years
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
May 9 – May 13
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Style: DELTA Pro Ultra Battery
Our son is a huge ecoflow fan so he recommended for us to get the ecoflow delta pro ultra! He has an extra inverter so it turns out that all we needed to buy was the battery itself! It’s great since we got to save money instead of buying the whole system! The battery is very heavy but at 110lb or so we aren’t too old to move it quite yet! (In our 70s). Our son recommended us to use it to backup our refrigerator since we don’t yet have the smart panel installed so we can’t quite tie it into our home, and our HOA don’t allow for solar panels, but my son and I ran a test and this thing is running our refrigerator as we speak and it’s been two and half days! Still got around 7% left! It’s a game changer for retiree like myself because I travel a lot with my wife and often gone for weeks, so being able to back up my fridge for so long really gave me the peace of mind. I also own some rental property and to be able to power up a tenant’s home during an outage is also quite useful! Nothing make happier tenants than light and warmth. Lastly, my beautiful grandkids love to play with this big instrument. My naughty son even shove his sister away just so he can play with it. She keep saying “sheer!” I think she wants to play too.
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Reviewed in the United States on September 21, 2025 by Amazon Customer
Style: DELTA Pro Ultra Battery
Very pleased and satisfied with my order! Value for the money is great because I purchased on sale! It is extremely heavy. I believe the weight is around 70 pounds so definitely order the trolley! The design is very sleek and the big quality seem very good! The capacity for energy storage is excellent and the noise level is minimal! Their customer service is outstanding. I ran into an issue receiving an inverter with software issues. Sent it back to the company and they had a new one out within a week. I would definitely recommend!
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Reviewed in the United States on March 18, 2025 by Amazonyyyy
Style: DELTA Pro Ultra Battery
Works great and holds charge for longer than expected. Wish they were more inexpensive.
Reviewed in the United States on October 12, 2025 by Kevin Miller
Style: DELTA Pro Ultra Battery
I got the EF ECOFLOW Extra Battery for my DELTA Pro Ultra, and overall, I’m really happy with how smooth everything was—from delivery to setup. The packaging was solid and premium, which made unboxing feel good. Setting it up was super easy; it literally took just a few minutes to connect to my DELTA Pro Ultra inverter. It’s true plug-and-play—no complicated tools or settings needed. That’s a big win for someone like me who wants extra power without extra hassle. If you’re looking to scale your energy storage, this battery is definitely user-friendly once it’s in place. But here’s the thing—it’s heavy. Like, really heavy. I didn’t realize how much two people might be needed just to lift and stack it safely, especially as you add more units. I was surprised by how quickly the weight adds up. Once you go beyond four batteries stacked, the whole setup can start to feel top-heavy. ECOFLOW recommends wall anchors at that point, and after thinking about it, I totally get why. If the stack tips, we’re talking over 500 pounds crashing down. That’s not just dangerous for furniture—it could seriously hurt someone or damage flooring, especially if the surface isn’t perfectly level or solid. So while the tech is simple, you’ve got to plan your space carefully. Still, I can’t knock the performance. It gives me peace of mind knowing I’ve got serious backup power when I need it. It’s ideal for home backup, off-grid setups, or even heavy-duty job sites. As long as you respect the weight and install it safely, it’s a powerful, reliable upgrade. Just maybe keep it away from high-traffic areas and make sure your floor is strong enough to handle it.
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Reviewed in the United States on November 10, 2025 by DB
Style: DELTA Pro Ultra Battery
So far I love this product, it has made possible the ability to have whole house backup without all the nonsense of the powerwall it has its own inverter, its own charger and the multiple ways to to charge. It has a 6kw capacity per battery and expandable! The cost is substantially less expensive than the alternative. So far 5 stars!
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Reviewed in the United States on June 15, 2024 by bill hronick
Style: DELTA Pro Ultra Battery
I purchased an EF ECOFLOW Extra Battery for Delta Pro Ultra, Lifepo4 Battery Backup for Home Use, Emergency, Camping, RV on Cyber Monday Dec 1, 2025 that was advertised for 42% off and 0% interest for 12 months. The battery arrived quickly and is of nice quality and works as advertised. However ………. When the statement came in my email the only thing that was correct was the purchase price. It was set up as a regular purchase with installment payments of $49/mo which would incur significant interest payments over the course of the installment payments. I had to contact Synchrony to get the 12 month 0% interest plan applied and the correct monthly payment set up in order to pay it off in 12 months to avoid the interest. I haven’t seen a 5% cash back payment show up anywhere. Still waiting. I’ll never trust another Cyber Monday or Black Friday purchase to go as promised for special financing or 5% cash back promises. I’ll only make the purchase if I can pay for it completely at checkout.
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Reviewed in the United States on December 11, 2025 by Susan Leigh
Style: DELTA Pro Ultra Battery
Man are these things heavy! I’m not weak, I have a toddler I must raise above my head at least 100 times a day - and she weights 25 lbs, so that’s easily 2,500 pounds I curl each day…. But god bless my FedEx driver for not burning my house down because when I ordered 3 batteries and the head unit, I had no idea that these things weight 120lbs a piece. And I’m not a scientist but for some reason, things tend to be heavier in the winter time! So after I only slightly struggle to get these into my garage, I unbox them all like a kid at Christmas - and let me tell you, it is as easy as legos to put together. It all just makes sense. Have them all charged up and waiting for the electrician to come this week to install the Smart panel 2, so we will be all set for a few days should the amazing Texas power grid decide to crap out. They are expensive but I plan to continue to buy more batteries in the future to protect my family and home.
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Reviewed in the United States on January 22, 2024 by Pkp4life
Style: DELTA Pro Ultra Battery
Bought this battery to supplement my current system. Seems to work fine. I thought I had an issue but it turns out I didn’t but happy to find that support was very responsive to my perceived issue.
Reviewed in the United States on September 23, 2025 by Roger