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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15 Comments
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even with the $300 price drop, this deal is only becoming lukewarm.
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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.
The current smart panels still aren't THAT smart. I'd be interested to know of anyone who's using this inline with a furnace fan (send a new line from the main panel breaker, drop it down to a socket (I guess - not really seamless) and then power up a line out.
It doesn't seem like rocket surgery to do it this way and build yourself zones - the 'replace the whole panel' applications (IMO) haven't had enough adoption to work out what needs to be done to correct the process over several generations.
Just curious as to what anyone has actually implemented
-Ernie
The current smart panels still aren't THAT smart. I'd be interested to know of anyone who's using this inline with a furnace fan (send a new line from the main panel breaker, drop it down to a socket (I guess - not really seamless) and then power up a line out.
It doesn't seem like rocket surgery to do it this way and build yourself zones - the 'replace the whole panel' applications (IMO) haven't had enough adoption to work out what needs to be done to correct the process over several generations.
Just curious as to what anyone has actually implemented
-Ernie
You don't NEED the smart panel.
even with the $300 price drop, this deal is only becoming lukewarm.
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You don't NEED the smart panel.
Way ahead of you
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".
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