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David_David 8.4K Views
Jun 18, 2025 7:01 AM

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

$4,499

$4,999

10% off
Costco Wholesale
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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
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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 12:54 PM
100 Comments
Joined Sep 2016
OrionAntaresJun 18, 2025 12:54 PM
100 Comments
A 30 mile range extender for my EV!
2
Jun 18, 2025 2:08 PM
1.8K Comments
Joined Jul 2014
JimB3957Jun 18, 2025 2:08 PM
1.8K Comments
Better deals out there with more power.
5
Pro
Jun 18, 2025 2:37 PM
564 Comments
Joined Jan 2015
pricesniper
Pro
Jun 18, 2025 2:37 PM
564 Comments

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

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 4:11 PM
1.6K Comments
Joined Jan 2009
DocuMakerJun 18, 2025 4:11 PM
1.6K Comments
Quote from pricesniper View quoted comment :
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 7:52 AM
508 Comments
Joined Nov 2007
slickfanaticJun 19, 2025 7:52 AM
508 Comments
Quote from JimB3957 View quoted comment :
Better deals out there with more power.
Pecron always come to mind. Smilie
Jun 20, 2025 2:49 PM
369 Comments
Joined Nov 2007
kd_thedealmanJun 20, 2025 2:49 PM
369 Comments
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 3:59 PM
1.6K Comments
Joined Jan 2009
DocuMakerJun 20, 2025 3:59 PM
1.6K Comments
Quote from kd_thedealman View quoted comment :
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 5:36 PM
70 Comments
Joined Nov 2023
AquaStag976Jun 20, 2025 5:36 PM
70 Comments
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 5:43 PM
70 Comments
Joined Nov 2023
AquaStag976Jun 20, 2025 5:43 PM
70 Comments
Quote from kd_thedealman View quoted comment :
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 6:07 PM
737 Comments
Joined Dec 2017
DealArtistJun 20, 2025 6:07 PM
737 Comments
Quote from AquaStag976 View quoted comment :
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 7:33 PM
369 Comments
Joined Nov 2007
kd_thedealmanJun 20, 2025 7:33 PM
369 Comments
Quote from DocuMaker View quoted comment :
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 vomit
Jun 23, 2025 9:00 PM
1.6K Comments
Joined Jan 2009
DocuMakerJun 23, 2025 9:00 PM
1.6K Comments
Quote from AquaStag976 View quoted comment :
[*]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 4:05 AM
416 Comments
Joined Oct 2008
ck90211Jun 25, 2025 4:05 AM
416 Comments
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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