EF ECOFLOW DELTA 2 Max Power Station Extra Battery, 2048Wh LiFePO4 Battery
Condition: New
$899.00
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was $1,199.00
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Availability:
In Stock.
Arrives
Monday, Nov 2
At a glance
- Condition
- New
- Style
- DELTA 2 Max Extra Battery
- Model
- EFD350
- Dimensions
- 11"L x 9"W x 18"H
- Weight
- 42 lb
- Color
- Black/Grey
- Wattage
- 2048 watt-hours
- In the box
- EcoFlow DELTA Max Extra Battery
- Warranty
- 1 year manufacturer
Features 3
- Expandable Capacity. Increase the capacity of DELTA 2 Max with an extra 2048Wh.
- Triple the Power. 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to hit a capacity of 6144Wh. Ideal for home backup, RVing, outdoors or even everyday use.
- Built to Last 6 Longer. Get 10 years of daily use until hitting 80% of its original capacity. Thats down to its LFP battery chemistry giving you 3000+ cycles.
Description
Without internal combustion engines, solar generators are extremely quiet. From a distance of approximately 20 inches, the noise level of a DELTA 2 Max solar generator (low input and output of around 500W) is only 30 dB, versus others with a volume of 45 dB or higher. In comparison, gas generators can run at an average of 70 dB even from a distance. Solar generators don't burn fossil fuel, so with zero emissions or fumes, they're a clean replacement for gas generators. Unlike gas generators, there's no fuel to refill, filters to clean, or moving parts to break. Without engine oil level checks, oil changes or spark arrestor inspections, spend more time on doing what you like. Outdoors is the only safe place to operate a portable gas generator, keeping your family safe from toxic carbon monoxide. Since it doesn't emit any fumes you can use a solar generator anywhere, inside or out.
Specs 29
| Brand | EF ECOFLOW |
|---|---|
| Wattage | 2048 watt-hours |
| Fuel Type | Electric |
| Power Source | Solar Powered |
| Recommended Uses For Product | Camping |
| Item Weight | 42 pounds |
| Voltage | 120 volts |
| Output Wattage | 2048 |
| Special Feature | Expandable capacity |
| Additional Features | Expandable capacity |
| Engine Type | 4 Stroke |
| Ignition System Type | Electronic |
| Engine Displacement | 79 cubic centimeters |
| Total Power Outlets | 6 |
| Starting Wattage | 3400 watts |
| Frequency | 50 hertz |
| Runtime | 601600 hours |
| Item Dimensions L x W x H | 11"L x 9"W x 18"H |
| Brand Name | EF ECOFLOW |
| Model Name | DELTA 2 Max |
| Model Number | EFD350 |
| Item Highlight | Compatible with DELTA 2&DELTA Max 2000&DELTA 2 Max Outdoor Generators |
| Number of Items | 1 |
| UPC | 842783131614 |
| Manufacturer | EcoFlow |
| Item Type Name | DELTA 2 Max Extra Battery |
| Manufacturer Part Number | EFD350 |
| Color | Black/Grey |
| EU Spare Part Availability Duration | 10 years |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 2
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
DEFINITELY a must have for an add on to 1kwh batteries!
I bought 3 of Delta 2 batteries, along with a Delta 2 Max extra battery to extend one of the batteries out to 3kwh, and a couple river 2 pro and river 2 max batteries (and about 2200w in solar panels). They are extremely handy in a power outage situation (just tested for days after hurricane Milton), for example 1 delta 2 could run my fridge for about 16 hrs, but with the delta 2 max extra battery, that extended it to about 40-45 hrs! Not too shabby, but if you have panels, and there's no sun...well, gas inverter generator works to power them fairly quickly. That being said, I stockpiled about 8kwh in total in ecoflow batteries in addition to 9 panels of varying strengths ranging from 200w-400w each, with the intention on being able to run my fridge, freezer, internet, power some things like tv, computers, etc, but most importantly, being Florida, my portable AC. It did all of the above great (except for the multi-day cloud cover preventing the panels from being useful), but when attempting to use my portable AC, even on a delta 3 plus (same size, but provides 2 solar inputs and more output for ac plugs), it immediately shuts down the portable AC and goes into an overload status. So, it checked nearly every box, but 90 degrees in a house in florida without ac can really really suck. It did power a few 20" box fans nicely, so I made a bit of a swamp cooler of sorts with those instead. All in all, VERY useful during a multi-day outage, but make sure you have an inverter generator to charge them as well. You will use far less gas from your gas generator in charging these and letting them take over primary power for everything that you would using the gas generator alone. The extra battery really is a must have, because it extends the range of the 1kwh and 2kwh batteries significantly! Just don't be tricked by the fact the main battery always says there is input, even when not hooked to AC power or panels.
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Reviewed in the United States on October 13, 2024 by Lucky B
Great expansion. About to get me another
I have the delta 2 and needed more capacity. Although it is not listed or pictured. It came with the connector cord. It arrived really fast. I was able to run my fish tank all night for 10 hours and still had 30% capacity. Now I just need to get my solar panels in the roof to get my tank off grid. Should save me 100$ a month. That's what my edison bill is costing me . I also camp often and bring my battery as a back up for days my solar panel doesn't produce enough . These are petite enough to dig under my dinette. It's saved me twice already now. One day I'll get another expansion pack!!! It's convienent enough that I drag it with me to work some days when I know I'm out on the field all day. I run a small microwave to heat up lunch so I'm not eating cold food like a cave man .
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Reviewed in the United States on April 26, 2026 by Derk
delta2 max
it's a great product for camping or general use around the home. If you are planning a near off grid power solution, move up to delta pro or to delta 3 pro. or completely off grid use delta pro ultra. I love my delta 2 max, i have 2 plus 2 more extra battery. I do plan to purchase 2 more extra battery to complete my solar power system. Customer service sometimes gets you fluster but at the end they get the job done. You also need to pay attention to the item. I have several delta mini. Bought it because it said 1400 watts, but its only 882 capacity watts, to use up to 1400 watts you need to activate boast. however it drains you battery faster. pay attention to which power solution you are purchasing, their are delta 2- 1000 watts ,1300 watts and 1600 watts. also to make it more confusing their is delta 2 1900 watts and 2048 watts. delta max is 2048 watts. I love the minis, great for outdoors, camping. I use both my delta 2 max plus batteries to lower my power bill in san diego, which is the most expensive power company in my opinion.
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Reviewed in the United States on April 11, 2025 by David A
Fantastic Fast Delivery of a Quality Product
This EcoFlow 2Max Extra Battery was delivered today and I am very pleased to say it so far functions very good and nothing was broken or damaged during the shipping and delivery process as before in a previous same purchase. I can confirm that the operation and functionality is exactly as described in the advertisement for this product and additional 2048 Watts to my solar generator system will definitely cover my electricity needs during this upcoming summer months and fire season when the main power supply grid is shutdown for public safety. I would recommend these devices be purchased for your homes in case of any future power outages because they are very efficient and and very easy to use and will save you money and discomfort during the upcoming months. Long story short, the EcoFlow company works with customers to help purchase their products by offering different types of payment plans that are compatible with many budgets so anyone can afford to pay for a important product that will help them during power outages that occur very frequently nowadays. Thank you (I’m pretty sure I will purchase one more extra battery so I can run my air conditioner when the heat is causing the power grid to be shut down and instead I will be enjoying my regular life without disruption and sweating in the heat waiting for the power company to turn back on the grid power supply to every house )
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Reviewed in the United States on February 21, 2025 by Mario Navarro
Works like a charm
Has not disappointed! All around great sense of security (power backup)if something goes wrong with the electric supply to the house. Have tested it on many different items for hours on top of hours. It is heavy but simply solved by building a cart that holds the station and extra battery (or 2 batteries). Charges quick by AC power. Planning on testing solar charge soon.
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Reviewed in the United States on May 30, 2026 by L & F
service complied
The battery is good, The seller shipped the 45W panel and everything is fine. Thanks
Reviewed in the United States on June 29, 2026 by Carlos Jiménez Soler
Good additional battery
I bought the additional battery to go with my Delta 2 Max and four solar panels. Setting up is very straight forward and the connect cable is easy to use. The Delta 2 Max instantly recognizes the battery and it even shows on the Eco Flow app. I connected both to my solar panels and charged them to 100% as I was curious to see how they would balance out as the new battery arrived at 60% charge and my Delta 2 Max was at 75%. Charging was quick from my solar panels as the Delta 2 Max shunted much of the power to the extra battery until they were both at the same charge level and then the load evened out. I bought the extra battery on sale and think it’s a great addition as now I can generate and store 4 KW hours of power. My plan is to add a second smart battery so as to max out at 6 KW hours. The smart battery weighs almost 10 pounds less than the Delta 2 Max and is easy to move around. It’s size allows for easy storage in a on top of the D2 Max.
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Reviewed in the United States on October 6, 2024 by Jason
Excelente
La tengo conectada a un delta 2 simple y va perfecta, Alimenta mi neverita de 3.5 pulgadas por mas de 1 dia. La carga 3 horas aproximadamente para el delta 2 y la bateria, lo cual es consistente con un equipo de 3000w/h.
Reviewed in the United States on October 14, 2026 by Alexander