EF ECOFLOW Portable Power Station DELTA 3 Max, 2048Wh LiFePO4 Battery, Solar Generator (Solar Panel Optional), 3400W X-Boost
4.6 | 2,091 ratings
Price: 699
Last update: 12-05-2025
About this item
- Ultra-Fast Charging, 0–80% in Just 1.13 Hours – Thanks to EcoFlow’s advanced X-Stream technology, DELTA 3 Max can recharge from 0–80% in just over an hour. That means less waiting and more doing, whether you’re preparing for a blackout, charging before a road trip, or topping up at the campsite. Reliable power is always ready when you need it most.
- Up to 3400W Continuous X-Boost Mode – Power 99% of Appliances – With an impressive 3400W X-Boost output, this portable power station easily runs high-demand appliances like fridges, microwaves, and even power tools. From emergency backup to RV adventures, enjoy peace of mind knowing your essentials stay powered without overload.
- Ultra-Quiet Performance & Rapid 10ms Transfer Time – Designed for home backup, DELTA 3 Max kicks in with less than 10ms transfer time, keeping sensitive electronics like computers and medical devices safe from outages. Plus, its ultra-quiet operation ensures your nights remain peaceful—no noisy distractions during use.
- Lighter & Durable Design, Built for 10 Years of Daily Use – DELTA 3 Max engineered with a long-lasting LiFePO4 battery. Its lighter, durable build makes it easier to carry from your home to your RV or campsite without sacrificing strength or performance. EcoFlow DELTA2 Max electric generator also comes with an extended 5-year service.
- Smarter App Control – Save on Costs Without Sacrificing Comfort – Connect with the EcoFlow app to monitor energy use in real time, set smart priorities, and cut electricity costs. Easily manage charging and discharging schedules, all while ensuring your comfort and convenience remain top priority.
Product information
Features & Specs
| Wattage | 3400 watts |
|---|---|
| Fuel Type | Solar |
| Power Source | Solar Powered |
| Recommended Uses For Product | Camping, Residential |
| Output Wattage | 2400 |
| Additional Features | Portable |
| Engine Type | Solar |
| Total Power Outlets | 3 |
| Engine Power Maximum | 3.4 Kilowatts |
| Starting Wattage | 3400 Watts |
| Running Wattage | 3400 Watts |
Measurements
| Item Dimensions L x W x H | 9.4"L x 12"W x 19.44"H |
|---|
Additional details
| Material Type | Aluminum, Plastic |
|---|
Warranty & Support
Product Warranty:For warranty information about this product, pleaseclick here
Feedback
EF ECOFLOW Portable Power Station DELTA 3 Max, 2048Wh LiFePO4 Battery, Solar Generator (Solar Panel Optional), 3400W X-Boost Output, Ultra-Fast 0-80% Charging in 1.13 Hr, Home Backup & RV Camping
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Item details
| Brand Name | EF ECOFLOW |
|---|---|
| Included Components | Delta 3 Max |
| Model Name | DELTA 3 MAX |
| Model Number | EF-DL-H02-3M |
| UPC | 842783191779 |
| Manufacturer | ECOFLOW |
| Customer Reviews | 4.64.6 out of 5 stars(2,120) 4.6 out of 5 stars |
| Best Sellers Rank |
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| ASIN | B0FQV6LMVX |
| Item Type Name | portable power station |
| Item Height | 19.44 inches |
| Warranty Description | 5 year manufacturer |
Top reviews from the United States
- FarookPowerful, Fast, and Amazingly Well-BuiltI just received the DELTA 2 Max, and right out of the box it made a strong impression. The charging speed is the first thing that stood out to me. When I plugged it in for the first time, the percentage jumped so quickly that I actually double-checked the display. Getting to 80% in under an hour is not an exaggeration — it really does it.
The overall build quality feels premium. The LFP battery chemistry was a major reason I chose this model, and even as a new owner, you can tell it’s designed for long-term durability. It gives a sense of confidence that you’re not buying something that will fade out after a handful of uses.
I immediately tested it with several of my own devices — my computer setup, my monitor, some studio gear, a few household items — and it handled everything without even blinking. Seeing it push out clean power to multiple things at once reassures you that the 2400W rating is not just theory. The number of outlets also makes it practical; I never felt limited or cramped trying to plug in several items at the same time.
The quiet operation is another pleasant surprise. When it’s charging, it’s barely noticeable. I had it sitting a few feet away, and it never became a distraction.
The expandable capacity is also a smart feature. Even though I haven’t added extra batteries yet, just knowing that I can turn this into a much larger backup system if needed is a big plus.
Overall, as a new owner, everything about this unit feels solid, fast, thoughtfully designed, and genuinely capable. It delivers exactly what I hoped for when I ordered it. - Florida GirlHats off to EcoflowI couldn’t be anymore happier with my unit. Charged within 45 minutes to 95% from 26% plugged in to DC.
Charged with solar panel up to 85% within 4.5 hours from 23%, sun wasn’t that hot in Michigan but a lot faster than my Jackery solar panel charging my explorer 1000 which I love for portability.
I bought the Ecoflow to run my sewing machine to do shows while traveling and it works perfectly well for my needs. I am a full time solo traveler therefore both my solar generators get a good workout. A full charge will last me 2 weeks +
Hats off to Ecoflow for a fantastic solar generator. - D RoachGreat portable powerstation for everyday use around the houseThis is a great Unit and can do most everything in your house. Now this is not a full home backup for days, but can run most appliances in a home. Fridge, microwave,air fryer,pressure cooker,fan,TV internet,small electronics. No problem. Great for on the go. Solar input,AC,DC car charge or pure sine wave generator to charge unit. Can move room to room easy or take camping or on the go. Love the size of the screen. This could last about a week camping and attach couple of solar panels and you are set with power. Great for outdoors where there is no outlets. Think Christmas lights being plugged into the unit. Make Hot chocolate or coffee at festivities. Parade floats for lighting items up.
Small Con is only one solar input compared to the Delta 3 max plus has 2 solar ports
Weight: Weighs about 48 lbs, but for this size of unit pretty good portability still. Can use a wheeled dolly to move it also. - Chance JEXCELLENT POWERSTATION - EXCELLENT VALUEI own a few of Ecoflow's power stations, and this is an awesome addition. Software is awesome, 2.4kw inverter runs most of my appliances. And the 2kwh capacity is perfect. And this is actually lighter in weight than its predecessor, Delta 2 Max. Despite the lack of extra battery capability, and only one solar input, the lower price reflects the subtractions and is perfect for those who don't need the extras.
- bradley cohenVery good when used on a hydronic recirculating ( radiant) water furnanceWorks very well.
Although the app isn't 100% accurate as far as the graphic display is concerned. I have set the app to stay on in the background but it times out sometimes when my phone goes to sleep anyway. May be phone related.
Best to fully charge before use ( comes at 30% ) and cycle down to shut off when first using, to set the internal calibration. I like the variable charge rate as I think it will provide a longer battery life over time.
I use it as a UPS for my gas, hydronic recirculating (radiant ) water furnace ( very efficient, house built in 1950 ) and used it for a complete run to shut off, it lasted about 3 days as my furnace uses about 37W when running and I occasionally ran the circulator for my gas fired water heater ( 67w). My furnace didn't "feel" the switch from grid to battery at all.
It's Fall here in Michigan so the furnace doesn't cycle that much as compared to the depth of winter. As a UPS it discharges about 1%/day due to it's internal needs. I set the charge range 10%-90%. Will charge to 100% when bad weather is due. The app has a "storm" setting that will set the charge to 100% if a weather notification is broadcast, not sure if it works yet.
I imagine a furnace that uses forced air heat will use more power, so I would recommend a higher capacity set up for those systems.
I have an older Ecoflow with 1024W capacity but it uses different battery tech and no app, I am much more confident using this model for my furnace and will use the other unit for less important needs during a failure. I have solar panels I bought with the first unit but I do have access to a home with a Generac if my outage lasts long enough to run down my backups