I bought this unit about a year ago and couldn't be any happier with any purchase. My wife is on oxygen 24/7 and this year the power company is replacing all the power poles in town. Her oxygen concentrator will put out 4 liters continuously for 9 hours on a full charge. It will charge from empty to full in about 85 minutes. I've ran this Delta Max for about 140 hours since purchase and still thrilled over this unit. Piece of mind.

I have only put this through a four hour test, but it seemed to perform exactly as advertised.

I watched a lot of YouTube videos on the EcoFlow products. The "Wave" air conditioner was rated excellant. especially for my camper van. A few videos recommended buying the Delta Max battery instead of the smaller battery that attaches to the Wave as I would get more hours of running time with the Wave. I bought the Max and the connecting cable and it works great! I am a full-time RVer and travel in my camper van with rooftop solar panels, across the U.S. I like the fact that I can do remote camping and still have A/C. And the same if the electrical grid goes down due to heat waves and storms! And with temperatures increasing every year, I look at purchasing the Ecoflow Wave and the Ecoflow Delta Max with longer running power, a necessity!

Extremely well built and highly useful layout for all the outputs as well as the inputs. The App is fantastic for device management and monitoring. Perfect unit for a power failure or off grid situations because it can handle just about anything you throw at it.

This battery power station does exactly as described. Our block had a power failure and thank goodness we had this little brute on hand. 1 day turned into a 2 day outage. We hooked up the fish pond and small refrigerator to it, just plugged them in and it performed perfectly. I noticed we might need a longer time frame as our power company was replacing 2 underground transformers in front out our house. Well...as luck would have it our Neighbor was able to recharge our power station PDQ. The quick charge mode on this baby we were fully back in 'ON' mode in 2 hrs. Here we are again, with a notice of a full power outage for 8 hours, we're ready! I am now going to include an extra power pack, and maybe even the solar attachment. THANK YOU DELTA Max!

Shortly after I purchased the Eco Max hurricane Ian's affects came through and we were without power for a few days and the Max helped greatly with keeping our freezers and refrigerators plus smaller appliances running. Easy to use and great product.

I have to unplug solar when there isnt any sun to prevent battery damage? (Per Ecoflow) Good for a backup, worthless if trying to use for an off grid application or trying to cut your electric bill...also the bms system for the additional batteries is non existent....disappointed

I ordered this product at the end of June 24, 2024. Its was on a great sale. Its July 15 and am still waiting. Tracking says that it in shipping but have not received why it is taking so long. After reading the review with one star, I am nervous that something that I was going to get for my retirement will be lost in the shuffle and I will be out $1031. I dont want the money; I want the power supply! Somebody is going to get called in to small claims court and GET a whole bunch of BAD PRESS!

Ordered from Sam’s on line. Got confirmation of order on line with Fed x tracking #. Made at least 5 calls to Sam’s about order. They charged to my credit card in 4 days and never shipped item. Tracking at Fed X shows they never received to ship out. Trying to get my $1,000.00 back. Sam’s said they can’ help because it comes from supplier they paid.

Bought 3 unit thinking from reading reviews and all that these Ecoflow units were Ecoflow Delta 2 Max. But no, after re eiving them they all are Ecoflow Delta 2000. The old switcheroo. My fail I thought Sam's was different, Not. Read the specs