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expired Posted by David_David • Jun 18, 2025
expired Posted by David_David • Jun 18, 2025

EcoFlow DELTA Pro 3 Portable Backup Power Station System TWIN set Kit with 50AMP Hub $4499

$4,499

$4,999

10% off
Costco Wholesale
13 Comments 7,001 Views
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Costco Dual Ecoflow Delta Pro 3 promo deal price is back $4499.
-$500 discount will show at checkout
(matches Black Friday price)

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
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Dual Ecoflow Delta Pro 3 promo deal price is back $4499.
-$500 discount will show at checkout
(matches Black Friday price)

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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13 Comments

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Jun 18, 2025
74 Posts
Joined Sep 2016
Jun 18, 2025
OrionAntares
Jun 18, 2025
74 Posts
A 30 mile range extender for my EV!
2
Jun 18, 2025
1,622 Posts
Joined Jul 2014
Jun 18, 2025
JimB3957
Jun 18, 2025
1,622 Posts
Better deals out there with more power.
5
Pro
Jun 18, 2025
501 Posts
Joined Jan 2015
Jun 18, 2025
pricesniper
Pro
Jun 18, 2025
501 Posts

Our community has rated this post as helpful. If you agree, why not thank pricesniper

At this price point, if you don't need the portability, I would recommend buying an all-in-one inverter like the 6000XP connected to LifePower 48V batteries. It's eligible for the 30% solar tax credit, UL listed, and if a battery degrades or needs to be swapped, you don't need to send the entire unit to a company like Ecoflow.

If you do need portability, check out Will Prowse's Solar Kart series on YouTube.
2
2
Jun 18, 2025
1,515 Posts
Joined Jan 2009
Jun 18, 2025
DocuMaker
Jun 18, 2025
1,515 Posts
Quote from pricesniper :
At this price point, if you don't need the portability, I would recommend buying an all-in-one inverter like the 6000XP connected to LifePower 48V batteries. It's eligible for the 30% solar tax credit, UL listed, and if a battery degrades or needs to be swapped, you don't need to send the entire unit to a company like Ecoflow.

If you do need portability, check out Will Prowse's Solar Kart series on YouTube.
no thanks. 6000xp fan noise is quite loud and annoying. only suitable for installing away from living area. also, much more difficult to set up. if you want something diy, at least recommend the flex boss, which is much quieter than that screaming hair dryer 6000xp.
Last edited by DocuMaker June 18, 2025 at 09:16 AM.
Jun 19, 2025
484 Posts
Joined Nov 2007
Jun 19, 2025
slickfanatic
Jun 19, 2025
484 Posts
Quote from JimB3957 :
Better deals out there with more power.
Pecron always come to mind.
Jun 20, 2025
354 Posts
Joined Nov 2007
Jun 20, 2025
kd_thedealman
Jun 20, 2025
354 Posts
QUESTION FOR EXPERTS: I'm opening up a 1400 sq/ft medical office in a larger office building without backup power. So I'd like to install a battery backup system to "keep the lights on" in my office in case of power outages that happen a few times a year in my area. It does not need to be enough power to run HVAC systems. It simply needs to be able to keep the lights on and continue to provide power to minor 120v appliances (computers, tv, refrigerator, etc) for up to 12 hours. Would this bundle suffice? Can it be wired into the existing breaker box? Do I need anything else for the electrician to set it up?
Jun 20, 2025
1,515 Posts
Joined Jan 2009
Jun 20, 2025
DocuMaker
Jun 20, 2025
1,515 Posts
Quote from kd_thedealman :
QUESTION FOR EXPERTS: I'm opening up a 1400 sq/ft medical office in a larger office building without backup power. So I'd like to install a battery backup system to "keep the lights on" in my office in case of power outages that happen a few times a year in my area. It does not need to be enough power to run HVAC systems. It simply needs to be able to keep the lights on and continue to provide power to minor 120v appliances (computers, tv, refrigerator, etc) for up to 12 hours. Would this bundle suffice? Can it be wired into the existing breaker box? Do I need anything else for the electrician to set it up?
with a combined total of 8,000 watts output, this should be more than enough. you could probably get by with even one, at 4,000 watts. you will likely need the electrician to either wire in a 50 amp generator inlet box with an interlock on your panel, or a transfer switch with generator inlet. ecoflow sells one, called the smart home panel 2.

then you would plug both delta pro 3s into the hub, and a cord out from the hub into the generator/power inlet box of your breaker panel or transfer switch.
1

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Jun 20, 2025
30 Posts
Joined Nov 2023
Jun 20, 2025
AquaStag976
Jun 20, 2025
30 Posts
I have these and have mixed feelings about them.
  • During a power outage, I tried to hook it up and couldn't get the 50 amp hub to work. I had to update the firmware and it finally started working, which was a huge pain because the power was out and I didn't have wifi.
  • While they're turned on and idle (not in standby) they seem to consume a lot of electricity. Like they'll drain a good 10% in a day, which is 400wh.
  • Very heavy. I had planned to take them with me camping, but I keep hurting my back trying to load them into the bed of the truck.
So I dunno, has a lot of features in a nice package, but if I could do it over again I might look building my own system with batteries and an inverter.
Jun 20, 2025
30 Posts
Joined Nov 2023
Jun 20, 2025
AquaStag976
Jun 20, 2025
30 Posts
Quote from kd_thedealman :
QUESTION FOR EXPERTS: I'm opening up a 1400 sq/ft medical office in a larger office building without backup power. So I'd like to install a battery backup system to "keep the lights on" in my office in case of power outages that happen a few times a year in my area. It does not need to be enough power to run HVAC systems. It simply needs to be able to keep the lights on and continue to provide power to minor 120v appliances (computers, tv, refrigerator, etc) for up to 12 hours. Would this bundle suffice? Can it be wired into the existing breaker box? Do I need anything else for the electrician to set it up?
I went with the generator interlock approach because I was able to wire it up myself after watching a lot of youtube videos, although probably better to hire an electrician since some places require a permit.
Jun 20, 2025
502 Posts
Joined Dec 2017
Jun 20, 2025
DealArtist
Jun 20, 2025
502 Posts
Quote from AquaStag976 :
I have these and have mixed feelings about them.
  • During a power outage, I tried to hook it up and couldn't get the 50 amp hub to work. I had to update the firmware and it finally started working, which was a huge pain because the power was out and I didn't have wifi.
  • While they're turned on and idle (not in standby) they seem to consume a lot of electricity. Like they'll drain a good 10% in a day, which is 400wh.
  • Very heavy. I had planned to take them with me camping, but I keep hurting my back trying to load them into the bed of the truck.
So I dunno, has a lot of features in a nice package, but if I could do it over again I might look building my own system with batteries and an inverter.
I got a Delta 2 Max and at 50 lb it's the biggest 'portable' power station I'll get. 2kwh ratchet stepped in my trunk, charged by my alternator when I need it. For a bigger home system ill build it myself so if a part goes bad i can replace it individually.
Jun 20, 2025
354 Posts
Joined Nov 2007
Jun 20, 2025
kd_thedealman
Jun 20, 2025
354 Posts
Quote from DocuMaker :
with a combined total of 8,000 watts output, this should be more than enough. you could probably get by with even one, at 4,000 watts. you will likely need the electrician to either wire in a 50 amp generator inlet box with an interlock on your panel, or a transfer switch with generator inlet. ecoflow sells one, called the smart home panel 2.

then you would plug both delta pro 3s into the hub, and a cord out from the hub into the generator/power inlet box of your breaker panel or transfer switch.
I just noticed the Smart Home Panel 2 is required to have automatic conversion to battery power, which would be very nice to have! But, the reviews on that are mixed for some reason.. If the panel has relay issues it seems you're out of luck. So perhaps the manual switch is a better option. But I won't always be there to do that. Ugh
Jun 23, 2025
1,515 Posts
Joined Jan 2009
Jun 23, 2025
DocuMaker
Jun 23, 2025
1,515 Posts
Quote from AquaStag976 :
[*]While they're turned on and idle (not in standby) they seem to consume a lot of electricity. Like they'll drain a good 10% in a day, which is 400wh.
400wh divided by 24 hours is 16.67 watts per hour. not an unreasonable amount of idle drain at all, for the larger size of inverter. those eg4s that so many recommend use upwards of 50w per hour.
Jun 25, 2025
258 Posts
Joined Oct 2008
Jun 25, 2025
ck90211
Jun 25, 2025
258 Posts
If you don't need extra DP3 batteries then this is still a very good bundle to get 240V@50 amp output to back up 240V things like well pump, waterheater, cloth dryer, EV charger, stove, etc...

But I think the new Bluetti Apex 300 is the new value king. A 3 unit + hub (240V@48 amp output, and 16,560WH of storage) is around $6700. And if you don't need such high output, a single $1400 Bluetti Apex 300 can output 240V@16 amp with 2.76KWH storage.

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