EF ECOFLOW DELTA Pro Extra Battery 3600Wh, 2.7H to Full Charge, Battery Backup for Home Use, Blackout, Camping, RV
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Availability:
Only 4 left in stock, order soon!
Arrives
Tuesday, May 5
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Style: DELTA Pro Extra Battery
Features
- Expandable Capacity. With a extra battery, DELTA Pro can expand capacity from 3.6kWh to 7.2kWh for battery backup power supply. Thatll give you days of power for your essential appliances.
- Charge Anytime, Anywhere. DELTA Pros extra battery benefits from all the charging methods DELTA Pro has, including 6500W MultiCharge. That means you can charge anytime, anywhere as long as your extra battery is connected to DELTA Pro. Once connected, theyll charge/discharge in unison, keeping the battery percent level across both units.
- Ready for Any Emergency. When the going gets tough and youre out of charge options, get a 1800W DC fast charge with EcoFlow Smart Generator (sold separately). Just plug the generator directly into your extra battery via the port on the back. This works even when disconnected from your DELTA Pro.
- Stay Informed. The extra battery sports a bright LCD screen on the front of the unit giving you all the info you need. Output, input, remaining charge and time remaining. Its all there. Need on the go info? The EcoFlow app can tell you all that & a whole lot more.
- Smart Control. DELTA Pros extra battery can be monitored from the EcoFlow app, allowing you to monitor & control your batteries from afar.
Brand: EF ECOFLOW
Wattage: 3600 watts
Fuel Type: Battery Powered
Power Source: Battery Powered
Recommended Uses For Product: outdoor
Item Weight: 105 Pounds
Voltage: 120 Volts
Output Wattage: 3000
Special Feature: Plug&Play home backup solution, clean and safe power, long-lasting LFP battery
Included Components: Extra Battery, Charge Cable, Hand Cover, User Manual
Wattage: 3600 watts
Fuel Type: Battery Powered
Power Source: Battery Powered
Recommended Uses For Product: outdoor
Voltage: 120 Volts
Output Wattage: 3000
Additional Features: Plug&Play home backup solution, clean and safe power, long-lasting LFP battery
Engine Type: 4 Stroke
Total Power Outlets: 6
Starting Wattage: 3600 Watts
Frequency: 50 Hz
Runtime: 24 hours
Item Weight: 105 Pounds
Item Dimensions L x W x H: 25"L x 11.2"W x 16.4"H
Brand Name: EF ECOFLOW
Included Components: Extra Battery, Charge Cable, Hand Cover, User Manual
Model Name: EFD500-EB
Model Number: EFD500
UPC: 842783147097
Manufacturer: ECOFLOW
Manufacturer Part Number: EFD500
Unit Count: 1.0 Count
Item Type Name: power-generators
Warranty Description: 5 year warranty
Color: Black
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, May 5
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Style: DELTA Pro Extra Battery
I absolutely love these EcoFlow units. This Delta Pro Extra Battery is no exception. I own several EcoFlow products, and they’ve consistently been at the top of my list compared to other brands I’ve tried. This extra battery connects to the Delta Pro easily. It is heavy, so you may want someone to help you move it, but the wheels make rolling it into place simple. It comes with a very solid, thick connection cable that attaches securely to the Delta Pro. The extra battery has given me a huge boost in runtime. We use our Delta Pro as part of a backup system with a transfer switch, and adding this battery has made everything work even better—especially during outages and peak-hour usage. We already have solar on the house, so pairing that with EcoFlow has actually helped us reverse our electric bill. Pretty amazing. One of my favorite things about EcoFlow is their app. It’s smart, reliable, and shows exactly how long you have left on your battery, how long it will take to charge, and the wattage each device is pulling. I also love that you can use third-party smart plugs in the EcoFlow app; I use Tapo plugs and they work great. You can set timers and manage everything right from your phone. Charging flexibility is another big win. Whether I plug it into a standard outlet or charge it through solar, it’s quick and efficient. I personally charge mine at a lower wattage, but it’s capable of charging much faster if needed. EcoFlow always has great deals, excellent customer support, and a dependable honor system. This extra battery was a must-have add-on for my home setup, and I’m thrilled with how much more power and freedom it gives me. A fantastic upgrade.
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Reviewed in the United States on November 29, 2025 by Living Life
Style: DELTA Pro Extra Battery
Bought these as back-up in case of power loss. Have not used in emergency situation yet, but seem to be a quality product
Reviewed in the United States on December 24, 2025 by Kirk King
Style: DELTA Pro Extra Battery
FANTASIC! Easy to set up, plug & play. Reminder to store both the main unit and extra battery in a cool dark room. Keep ours in spare room next to window w window fan. They are sensitive to temps. Been using now for one year. Couple of power outages. Used for lights, cell phones, fans, and for our 1k portable AC in middle of Cali hot/dry summer when power went out as it always does around 4pm. Will run that AC for about 6 hrs on low and fully drains both the main and spare. In winter use for 200-watt Lasko mini heater, bathroom heater, heating pad and of course if power out. Have not used for fridge/chest freezer just yet, if outage more than 3-4 hrs will need to. Saving to get one more battery and one more bifacial glass panel. The folding portable that came with the main unit still works great in combo with the bifacial. For cleaning i hook up an RV water filter to hose, use the full or soaker setting-nothing else. Do not need a permit or electrician to tie these to the grid, nothing special just hook it all up, get the angle on the panels and boom start generating power! Be mindful that these types of batteries if not hooked up correctly or overheat and start a fire.
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Reviewed in the United States on October 31, 2025 by CarolynSJ
Style: DELTA Pro Extra Battery
Works well with my EcoFlow Delta Pro. After hooking up to the EDP, I charged it to 100%, then shut both down, waited 30 minutes. Started the EDP2 and held the power button for 20-30 seconds, then both were balanced. The only downside to the EDP2 is that you can only use 2 EBs and only 1600-watt solar.
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Reviewed in the United States on March 1, 2026 by jet1959mo
Style: DELTA Pro Extra Battery
My Delta Pro +extra battery wears several hats. Though I originally purchased this item to provide power to my RV while dry camping, I discovered that I could also connect this unit to the manual transfer switch I had already installed on my house to supply emergency power for my house for a few hours instead of using my gas generator. I prefer this method to using the gas generator because it is quieter and quicker and easier to start up and get going. So far, I have yet to have a power outage last longer than the capacity of my Delta Pro +extra battery but I am prepared just in case. In addition to this, I have four 400W solar panels connected full time to my Delta Pro to help keep down my energy costs. Connected to my manual transfer switch, I was able to do this without going through the expense of hiring an electrician to install a grid tie inverter. Instead, through the manual transfer switch, I am able to supplement my home electrical with approximately 7kw per day which saves me about $50-$60 per month on my electric bill. Not huge but not bad for using something I already owned that would be otherwise be sitting in a box between camping trips or power outages. Also, the Ecoflow app allows me to set up a "backup reserve" which enables me to utilize every single watt of solar power generated while not allowing my battery to be depleted beyond a certain level in case it is needed in an emergency. Absolutely brilliant! BTW, I found the 400w solar panels for about $180 each so that cost will be made up in just a matter of months instead of years with a full install. Overall, I am very happy with the flexibility and usability of the Delta Pro system. My only gripe is the incompatibility with other items in the Ecoflow lineup and the short proprietary cable necessary to connect the extra battery to the Delta Pro. Come on guys! If you can't come up with a non-proprietary solution, at least provide a longer cable that connects at a 90 degree angle so it doesn't take up so much room in the back. I'd even pay extra for it if it were available as an accessory. Other than that, this is a solid unit that I hope will provide years of faithful service.
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Reviewed in the United States on August 17, 2024 by Diverjay