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Customer reviews for 3400-Watt EcoFlow DELTA 2 Max Portable Power Station With X Boost Technology + 2 pcs 110W Solar Panel for
3400-Watt EcoFlow DELTA 2 Max Portable Power Station With X Boost Technology + 2 pcs 110W Solar Panel
4.7 out of 5 stars
stars
187 ratings186 reviews
  1. 5 stars84% (157)
  2. 4 stars12% (23)
  3. 3 stars1% (2)
  4. 2 stars0% (0)
  5. 1 star3% (5)

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Showing 101-110 of 186 reviews
Jul 25, 2023
Reviewer name: Joyfulness
5 out of 5 stars
5 out of 5 stars review

The Peace of Mind You Need During a Crisis

The Ecoflow Delta2 Max is the answer to what I have been wishing for. It is relatively light, it can be used in the house, can be charged with solar panels and the power output is phenomenal. After going through having had an attack on our local power station and being without electric for 10 days, I now have a peace of mind going into hurricane season that I can power my refrigator and freezer plus a few other things.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Aug 16, 2025
Reviewer name: Randal
5 out of 5 stars
5 out of 5 stars review

Definitely as advertised. Would recommend.

Received a split order on Thursday and Friday. Started testing today (Saturday). Insanely easy set-up. App works well. App includes a very detailed user manual that offers great hints for optimizing the system. Solar panels work well, even producing credible energy output under non-ideal conditions. Does everything I want it to so far, although I'd love some more length to the cables connecting the panels to the battery.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Jul 19, 2023
Reviewer name: Zellersr
5 out of 5 stars
5 out of 5 stars review

Ecoflow Delta 2 Max - Great Performance

The EcoFlow Delta 2 Max has the perfect capacity, along with the ability to add additional battery storage, for my home needs during emergencies. I want the essentials to be power backed up for my house in these times. With the flexibility to add additional batteries as needed, as well as integrate into the ever growing EcoFlow ecosystem of products, made it a great choice for the needs of my family.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Jul 25, 2023
Reviewer name: ECOMouse
5 out of 5 stars
5 out of 5 stars review

Delta 2 Max -- A Great Choice!

Purchased the Delta 2 MAX when it was released, and happy that I did. It has been a great device with the ability to power most all of my needs. My only gripe is, when charging the time to full capacity reads incorrectly. I have to unplug the solar panels, shut the unit off, then turn it back on, and then replug them in for it to read accurately.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Jul 20, 2023
Reviewer name: Dmont
5 out of 5 stars
5 out of 5 stars review

Awsome, this is a powerhouse!

I bought the new Delta Max 2 last week 7/11/2023, and it is incredible it is running my lights, internet connection, security cameras, induction stove, hair dryer, it will run my window unit ac refrigerator pretty much anything you throw at it. I have five 100 watt solar panels right now I will be getting five more to keep it charged up while I am working. It charges up extremely fast with the AC outlet. I've been watching Eco flow when they first came out when they came out with Delta Max 2 I just had to get it. So if you're thinking about buying one this would be the one to get thanks for everything guys!

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Jul 19, 2023
Reviewer name: Ecoflowuser
4 out of 5 stars
4 out of 5 stars review

Pretty good product for on peak power shifting

I got this to help shift my on peak power usage during expensive summer pricing. I have my refrigerator, router, tv, surround sound system, and a few lights plugged into this 24/7 and it powers them no problem. The fans are relatively quiet and the app makes it nice to check info about the unit. My biggest complaint would be solar charging.expect about 50-75 watts to be wasted in ac-dc conversion so if you get 200w solar you are actually only charging about 125-150. Other than that it’s a great unit and charges fast via AC wall outlet. Haven’t taken it camping but it can also be used anywhere since it’s only about 50lbs

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Jul 23, 2023
Reviewer name: Lazy Larry
5 out of 5 stars
5 out of 5 stars review

Quiet and easy to use

We recently used our new Delta 2 Max and an extra batter for a Delta Max on a week long camping trip. We ran all of our electronics including a 5000btu window AC on our tiny camper without any issues whatsoever. We have solar on the camper and were able to utilize the 2 solar inputs. We use one from the panels and the second from the DC outlet in the vehicle. Also we charged when need using a small inverter generator. The gray part is that we could charge completely in under 3 hours and run the AC all day for the dogs when it was hot. Without the Delta 2 Max we would’ve been just needlessly running a generator. Lots of features and happy to use this setup for many more years.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Sep 17, 2023
Reviewer name: nateintucson
5 out of 5 stars
5 out of 5 stars review

Amazingly long running

Already own a Delta, which is a five star product. But after a recent storm left us without power longer and run time shorter than expected we needed more. Well the more we found was in a Delta 2 Max. After receiving it we tested it on our frig, Whirlpool 22cf side by side circa 2008. 10hrs afterward it had 50% battery remaining. Decided to go all in and connect our 2 160w solar panels in serial purchased for our Delta. Started charging once sun was up at 220w. Solar started charging when battery was at 32%, 1 hr later battery at 37%. We've been in and out of frig adding groceries so it has run nearly non-stop for 4 hrs at 150w but our Delta 2 Max is recharged up to 55%. Sun is setting and input has dropped to 190w. So staggered at the performance, longevity and portability we went all in and bought the 2 add-on batteries and another 160w solar panel. FYI haven't used app and don't care to. Plan on getting manual switch over for whole home backup.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Oct 5, 2023
Reviewer name: Dogishappy1
4 out of 5 stars
4 out of 5 stars review

Heavy, but gets the job done

Works amazing and does 99% of what I ask of it in the form factor I need it, but the lack of 30 amp outlet and 24v car charger output are shortfalls I'd like to see resolved in a future product update. Moving this thing around also isn't the easiest thing. I can carry it one handed for a trip to the car, but anything beyond that, (or any use case that would drain the battery in one sitting) and I find myself highly unmotivated to use it. For now, it is the perfect backup power supply to my fridge and deep freezers. I bought this for electricity during emergency situations and it will definitely do the job!

Review from ecoflow
Helpful?57N1YK4LERJM13661605668
Jul 19, 2023
Reviewer name: SFL.Prepper
5 out of 5 stars
5 out of 5 stars review

Excellent Product Delta 2 Max

I recently purchased the EcoFlow Delta 2 Max to use as a Emergency Home Backup in case of power outages here in Florida from Hurricanes or storms. The unit is very well made with 2kWh, expendable to up to 6kWh, it is very quiet unit and has LFP Battery Chemistry. I highly recommend purchasing this unit either for camping or to use as a Home Backup in case of power outages to power your refrigerator, microwave, blender, coffee maker, washing machine, etc. The unit has the latest technology to recharge quickly and has a long lasting time span of about 10 years.

Review from ecoflow
Helpful?57N1YK4LERJM13661605668