EF ECOFLOW Delta Pro 3 4096Wh Extra Battery, 11-Year Lifespan Extra Capacity, Lifepo4 Battery Backup for Home Use, Camping Accessories, Emergencies, Power Outages, RVs
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Availability:
Only 10 left in stock, order soon!
Arrives
Jul 20 – Jul 23
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Style: DELTA Pro 3 Extra Battery
Features
- [Pair for Additional Needs] The rated capacity of one battery is 4kWh. The capacity can be expended up to 48 kWh by connecting additional DELTA Pro 3 units or extra batteries in parallel. It also accommodates charging via a gas generator for both the main product and extra batteries, allowing for an expansion up to a maximum capacity of 48kWh.
- [Reliable Power Endurance] DELTA Pro 3 supports LFP battery which provides 4000 cycles till it lowers to 80% capacity. Thats almost 11 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.
- [Energize Almost Everything] The EcoFlow DELTA Pro 3 supports 120V/240V voltage and has a 4000W output (6000W with X-Boost, scalable up to 12000W), powering nearly all essential home appliances, such as a 3-ton* central AC or a 1 HP water pump.
- [Forget Refueling] Featuring a 4096Wh LFP battery capacity, expandable to 48kWh with extra batteries or smart generators, providing 2-4 days of whole-home backup power. With 7 unique and 18 combo charging methods like AC wall outlets, solar panels, gas generators, EV charging piles, or the EcoFlow smart home panel 2, you can forget fuel worries.
- [Explore the Secure Feeling] The EcoFlow DELTA Pro 3 features automotive-grade LFP cells and IP65-rated CTC battery pack technology, safeguarding battery health and extending lifespan. Enjoy peace of mind with a 5-year warranty and exceptional customer service, available anytime for any issues.
Brand: EF ECOFLOW
Wattage: 4096 Watt-hours
Fuel Type: Non-gasoline
Power Source: Solar Powered
Item Weight: 72 Pounds
Voltage: 120 Volts (AC)
Output Wattage: 4000
Special Feature: EcoFlow DELTA Pro 3 Smart Extra Battery
Included Components: EcoFlow DELTA Pro 3 Smart Extra Battery
Product Dimensions: 8.49"L x 11.61"W x 27.34"H
Brand: EF ECOFLOW
Wattage: 4096 Watt-hours
Fuel Type: Non-gasoline
Power Source: Solar Powered
Item Weight: 72 Pounds
Voltage: 120 Volts (AC)
Output Wattage: 4000
Special Feature: EcoFlow DELTA Pro 3 Smart Extra Battery
Included Components: EcoFlow DELTA Pro 3 Smart Extra Battery
Product Dimensions: 8.49"L x 11.61"W x 27.34"H
Model Name: EFD521-EB
UPC: 842783143013
Manufacturer: EcoFlow
Item Weight: 72 pounds
Item model number: EFD521-EB
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 20 – Jul 23
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Top Amazon Reviews
Style: DELTA Pro 3 Extra Battery
I love EcoFlow and wanted a second extra battery. Super easy and seamless, no thought required at all. Power station and app does everything for you, you just plug it in. Done and done.
Reviewed in the United States on July 3, 2025 by SCL
Style: DELTA Pro 3 Extra Battery
I live in Florida and I believe in being prepared for the worst and hoping for the best. One week before the first hurricane came through last year I had purchased the main Echo Pro 3 battery as an emergency power supply because I live in a condominium community and discovered my gas powered generator was not allowed (so I sold it). I couldn't believe how lucky my timing was because when the hurricane hit the following week my wife and I were perfectly fine. I kept the refrigerator running and didn't lose any food. We cooked with a hot plate and microwave and generally were comfortable while all my neighbors struggled without power. The only problem was the battery would only last 36 to 48 hours depending on what I had hooked up to it and then I would have to take to a friend's house who still had power and recharge it. I wanted more power so I just purchased this matching unit of the Echo Flow Pro 3 which basically doubles the amount of power I have in case of a power outage. Whether I ever used it or not, the amount of comfort it provides just knowing I have it at my disposal is tremendous. However, as I stated earlier I live in Florida and I will probably get a chance to use it sooner than later. I really like my Echo Flow Pro 3. Just FYI....the pictures show the auxiliary unit on top of the main unit.
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Reviewed in the United States on April 1, 2025 by Amazon Customer Amazon Customer
Style: DELTA Pro 3 Extra Battery
Bought this to add to my Eco flow Delta pro three battery in control system for back up power. Seems to work great and hold it charge.
Reviewed in the United States on May 30, 2025 by Steve
Style: DELTA Pro 3 Extra Battery
Kept blowing fuses. Emailing for support, one question at a time, was no help.
Reviewed in the United States on June 26, 2025 by Michael A. Jones
Style: DELTA Pro 3+Extra Battery
Purchased this last summer. The day after it arrived we lost power at our house. I am really happy with the performance of the EcoFlow Delta Pro 3. We were able to plug in the fridge and freezer and some lights. Most of the use so far has been using it for boon docking with our travel trailer. It works great and we can even run our air conditioning for short periods of time. Looking forward to getting another battery to extend the time between charges.
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Reviewed in the United States on March 27, 2025 by Amazon Customer
Style: DELTA Pro 3+Extra Battery
This was very instrumental when Hurricane Helene came through SC with all its destruction and my power was out for 14 hours and all I had to do was plug my refrigerator into the Ecoflow power station. It was plugged in for 12 hours of the 14hours and I still had 79 per cent of my power. No gas to purchase and it stayed inside the whole lime with no fumes and no noise. How wonderful is that!!!!!
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Reviewed in the United States on October 5, 2024 by Gloria Julius
Style: DELTA Pro 3+Extra Battery
We ordered the Delta Pro 3 with extra battery and the extra battery was never shipped. When I turned on the Delta Pro 3 it showed an error message Overvoltage protection (312) Disconnect the appliance from USB-A Port 1 and nothing has been plugged into the USB-A Port 1 Update: Eric in customer service was very helpful. We received the battery the following day. Eric was prompt on sending us out a replacement for the main unit. We have charged it and it seems to be working. Can’t wait to try it out on the road.
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Reviewed in the United States on July 25, 2024 by Amazon Customer Amazon Customer
Style: DELTA Pro 3+Extra Battery
Update: The seller absolutely gets 5 STARS!!! The replacement was sent fairly quickly and this new one will run without shutting off for over 24 hours and is still running. It accepted the solar panels without any problems. Will certainly purchase from them again!!! Previous review: There have been several issues with the solar port and shutting down at this point. Seller has reached out to refund me due to some issues and ECOFLOW is looking into the matter. I’ve investigated time and money into this project and would prefer another unit or this one fixed outside of a refund. If it’s resolved I’ll update the review.
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Reviewed in the United States on August 10, 2024 by Sara W.