WOW! Costco has further dropped the price an additional $300 on this package bundle to
$4199!
(ALL Time Low for this Dual Delta Pro 3 WITH 50AMP Hub package)
-$800 discount will show at checkout
$800 manufacturer's savings is valid 6/27/25 through 7/20/25. While supplies last.
includes:
Two Ecoflow 4KWH Delta Pro 3 Main Units
One Ecoflow 50AMP Hub (connects two Delta Pro 3 Main Units together)
One 50 Amp NEMA 14-50P to SS2-50R Generator Cord (to connect to existing transfer switch or generator inlet -not included)
4000W AC output per Main unit (8000w surge)
Plug-and-play power solution with 120V/240V capability
2600w Solar input per main unit
LFP Battery 4000 cycles to 80%
https://www.costco.com/ecoflow-de...99769.html 
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38 Comments
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Two external generator drops, one goes exclusively to a lockout on one of the A/C units and the other to the main panel with the whole box on a master lockout.
At this point, I want to put the critical items on a no-interruption setup so I can skip going out in the sleet for the first hour in the event that Neversource brings the power back on. ¯\_(ツ)_/¯
If I wasn't as old as the invention of A/C I'd build my house with 3 separate systems, on 12VDC, One "always on" and one "dirty power".
These will last you 10-12 hours as long as you aren't running things that take a LOT of power for a long period.
I have well water so I needed 240v and this worked great.
ran it for 9 hours and still had like 35% left of battery on both of them.
I ran 2 fridges, one burner on the stove, made 3 or 4 cups of Keurig coffee, ran 2 computers each with dual monitors, internet, lights, showered.
Even ran the microwave for a few minutes.
I basically lived life like normal for 9 hours...the only thing I didn't do was run the dryer or AC.
You sound like a payed shill. Lol. Your well pump ran for a total of prob 10 min keurig for 5 min. I'm guessing your fridges were at temp so they just maintained. 9hrs is great unless you need days of power. You don't want to go out in the cold to hook up your generator? I don't have a stand by gen but I do have a 12k watt Gen that takes me literally 1 min to hook up and is lined and ran off my 1000gal propane tank. My Gen cost my $650. Yup... propane isn't cheap but guess what... I can go for a very long time on a power outage. And if you want to talk about Gen THD I have many sensitive electronics. And I've ran my Gen for atleast 60 hrs in the last 5 yrs and have no problems. I guess you could spend the extra money on an inverter gen if it makes you feel better.
PS: I can run my heat pump and dryer at the same time. I don't sacrifice anything.
the fact remains this costco package has never been less and this is an all time low price for these items from costco.
comparing it to a different product or brand I can understand, but its irrelevant in my opinion in regards to this being a deal or not for THIS specific product.
comparing to DIY inverter/charge controller/external batteries, exposed wiring and cables is a completely different product and build. Certanily can be less expensive and viable!
But all the price/Wh comparisons are mainly irrelevant, not every wants that, not everyone has the skills, time or want the look and footprint for DIY systems VS a mainly compact all in one plug and play unit. It is what it is.
if someone was looking to purchase THIS item, THESE items, today. It's the best price and deal you'll find. And it's not even close.
https://slickdeals.net/f/18337309-ecoflow-8000wh-home-backup-kit-2-delta-pro-3-units-with-50-amp-hub-free-ship-3799-05
individually the delta pro 3s brand new have sold for $1900-$2000 five months ago.
seeing how anker updated their f3800 to the f3800+ model, making it more competitive with the delta pro 3, and the bluetti apex 300 and the pecron f5000 are on the way, with the increased competition, the fact that the delta pro 3 is now a full year old, and getting older, and we all know a little more than 4 months from now, in november will be the best deals and discounts of the year, this deal is...
LUKEWARM AT BEST.
ecoflow deals always get a bunch of early thumbs up to get people's interest and excitement, and generate sales. then i notice more reasonable people come in and start thumbing down. either there are ecoflow company shills thumbs upping every deal to generate sales, or shills trying to increase slickdeals affiliate sales or something. or the public is getting dumber all the time. take your pick, but many power station deals are getting too many thumbs up, not just the ecoflows. too much shilling for the anker c1000s i have seen as well.
the EcoFlow Delta 2 1800w power station with 220w solar panel $629 deal is a joke as well. not worth $629 at all. who are the dummies/shills who voted that to a +7?
the delta 2 is so old and noisy that it should not sell for a penny over $350 on its own, and should be more like $300.
So your opinion is absolutely ok and just that your opinion.
If someone was in the market to buy this TODAY, the fact (not opinion) is this is the best price for these items and it's not even close.
...and I don't even particularly disagree with your 4 month opinion.
and Further to be perfectly clear I could easily make the argument ALL all-in-one power stations are a "BAD DEAL" for most people - but that would entirely depend on someone's need, WANT, goals or use case.
And bad deal compared to what? Apples vs Oranges. Honda vs Ford. Milwaukee vs Dewalt. In most instances it does not particularly matter to someone who wants to buy a specific thing or model, looking for the best current price for what they want.
And then on top of that, there are many people who are brand loyal to costco for the customer service, ridiculously easy and liberal return every and anything return policy, or maybe the 2% executive member reward cashback.. or the Gift Card/Credit card reward/sign up bonus game of saving. All of which things to me are a stretch and nonsense but nonetheless i *could understand it.
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PS: I can run my heat pump and dryer at the same time. I don't sacrifice anything.
I get the whole pro generator talking points....it works for you and that's cool.
I live in the Northeast and my circuit box is on the other side of my house. And in a storm or snow I would NOT be able to hook it up easily. I only lose power at most for 8-12 hours and this setup fits the bill.
Generator may work better for you, but I feel 1000% confident I will get way more uses out of this than you will out of your 650.00 generator.
For those that can afford it, 1000's of people buy Ecoflow and other battery solutions as whole home solutions and I am sure plenty of them in the South too.
But they probably live somewhere where the power doesn't go off for a week. Maybe someday you will live somewhere
where your power doesn't go off for many days at a time. For those people who don't have that issue, its a great solution.
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cleaner, more convenient solutions than a Gas Generator. So they come in to all these threads with ignorant statements like "duhhh If you want to pay 4k to power a few lights for 2 hours, have at it" which is beyond stupid.
You pay more upfront for them, but you may wind up paying less in the end
depending on how much you use it and if you incorporate solar.
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