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frontpageDavid_David posted Yesterday 11:31 AM
frontpageDavid_David posted Yesterday 11:31 AM

Costco Members: Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution

& More + Free Shipping

$7,700

$9,000

14% off
Costco Wholesale
61 Comments 14,202 Views
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Deal Details
Costco Wholesale has for their Members: Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution on sale for $7,699.99. Shipping is free.

Thanks to Community Member David_David for sharing this deal.
  • Note: Batteries ship separately.
Available:
  • Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution $7699.99
  • Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution + Solar Panel $8699.99
Features:
  • Scalable 18 kWh Solution Provides Up to a Week of Essential Power Supply
  • Exceptional 7200w Output Powers Most Household Appliances at 120v or 240v
  • Super-fast Charge Up to 8800w by Combining Solar and AC
  • Online Ups Ensures 0-ms Transfer Time, Offering Constant Protection for Sensitive Devices
  • Long-lasting 10-year LFP Battery for Reliable Performance

Editor's Notes

Written by ValPal2011 | Staff
  • $1,300 manufacturer's savings is valid 8/1/25 through 8/31/25. While supplies last. Limit 2 per member.
  • This price is $300 lower than the previous FP Deal.
  • Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
  • Rated 4.3 out of 5 stars from customer reviews.

Original Post

Written by David_David
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for their Members: Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution on sale for $7,699.99. Shipping is free.

Thanks to Community Member David_David for sharing this deal.
  • Note: Batteries ship separately.
Available:
  • Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution $7699.99
  • Ecoflow Delta Pro Ultra 18 KWH Whole-Home Power Solution + Solar Panel $8699.99
Features:
  • Scalable 18 kWh Solution Provides Up to a Week of Essential Power Supply
  • Exceptional 7200w Output Powers Most Household Appliances at 120v or 240v
  • Super-fast Charge Up to 8800w by Combining Solar and AC
  • Online Ups Ensures 0-ms Transfer Time, Offering Constant Protection for Sensitive Devices
  • Long-lasting 10-year LFP Battery for Reliable Performance

Editor's Notes

Written by ValPal2011 | Staff
  • $1,300 manufacturer's savings is valid 8/1/25 through 8/31/25. While supplies last. Limit 2 per member.
  • This price is $300 lower than the previous FP Deal.
  • Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
  • Rated 4.3 out of 5 stars from customer reviews.

Original Post

Written by David_David

Community Voting

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Top Comments

spydrmon
34 Posts
10 Reputation
so if I use 1k watt an hour constant for my basic items, this $7600 will not even last a day on a rainy stormy or cloudy day. I don't see the draw really for that kind of money.
etherag
51 Posts
48 Reputation
The value prop for these is if you've got rooftop solar. Then you can theoretically go much longer during an outage by topping it up on solar as it gets used.
KHHATL
771 Posts
88 Reputation
I dug deep to see if I could utilize this system to beat the Georgia power peak rate by using battery during peak hours and recharge during super off peak but my calculation (not accounting for battery degradation) indicated it would take 10 years before I break even. I didn't not count for solar panels as that is not feasible for me.

60 Comments

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Yesterday 06:05 PM
17 Posts
Joined Jan 2015
Yesterday 06:05 PM
kuramaltYesterday 06:05 PM
17 Posts
Quote from KHHATL :
I dug deep to see if I could utilize this system to beat the Georgia power peak rate by using battery during peak hours and recharge during super off peak but my calculation (not accounting for battery degradation) indicated it would take 10 years before I break even. I didn't not count for solar panels as that is not feasible for me.
I am surprised you can actually recoup the cost playing around TOU. The main draw to these units is should be emergency backup alternative to gas/NG generators. (Although this only support you a day or two max without solar.)
I have sump pump backed by standby generator and if my generator goes in a storm, I am sure getting flooded. And replacing a standby generator is around $10k anyway.
For me, the debate is spend $10k + maintenance/running cost for weeks of backup or 40k for 1.5 days. Heck no. I am sticking with generators.
If I can recoup the cost by playing TOU, I might consider battery, but 40k is still a lot.
1
Yesterday 06:38 PM
2,317 Posts
Joined Oct 2012
Yesterday 06:38 PM
reqUser098Yesterday 06:38 PM
2,317 Posts
Quote from spydrmon :
so if I use 1k watt an hour constant for my basic items, this $7600 will not even last a day on a rainy stormy or cloudy day. I don't see the draw really for that kind of money.
cheaper to buy a cyber truck and revrse.
1
Yesterday 07:20 PM
13 Posts
Joined Aug 2012
Yesterday 07:20 PM
SherbertineYesterday 07:20 PM
13 Posts
Am I nuts or is this really expensive? Look at an Ioinq 5 which is an EV with a 77.4kwh battery. It's also a car. It has over 4x the capacity of this unit but you can get them used for less than quadruple the cost of this pack. Oh, and every Ioniq 5 has V2L which allows you to use the vehicle as a backup battery for your house. And you get a vehicle along with the battery pack. I guess it takes more space and all that but it's a vehicle! With all the extra bits and bobs that come with it. A bit apples to oranges comparison I'm well aware but I feel the prices on these units need to come way down.
Yesterday 07:33 PM
5,692 Posts
Joined Dec 2004
Yesterday 07:33 PM
CaleoYesterday 07:33 PM
5,692 Posts
Quote from nfilipac :
Only worth it with heavy incentives, such as Comed $300/kWh battery storage when combined with solar and hourly pricing
Nothing like relatively frequent power outages to incentivize battery/inverter backup systems.
Paired with solar, they can also be used to 'peak shave' when power companies charge higher rates during weekday afternoons, as many do.
Yesterday 07:49 PM
374 Posts
Joined Jun 2005
Yesterday 07:49 PM
tiredpenguinYesterday 07:49 PM
374 Posts
IS there a way to hook these up to charge by home solar, for example if there's a multiday outage. I think the term is grid-forming inverter so the solar panels turn on while on battery
Yesterday 08:04 PM
5,692 Posts
Joined Dec 2004
Yesterday 08:04 PM
CaleoYesterday 08:04 PM
5,692 Posts
Quote from tiredpenguin :
IS there a way to hook these up to charge by home solar, for example if there's a multiday outage. I think the term is grid-forming inverter so the solar panels turn on while on battery
'Technically yes', and no. 'Technically yes' short answer is that it mainly depends on the system voltage vs what the Delta unit can take.
'No' wise - it's not advisable to try to manually switch active panels from an installed / grid-tied solar system over to a unit like this, especially if you don't know what you're doing.
If you don't know what you're doing, or aren't willing to learn in depth, and be absolutely confident you know what you're doing, don't do it.
Don't do it either way, really - you'd be violating code and setting yourself up for a catastrophic liability nightmare if you do it, regardless of how confident you are.
1
Yesterday 08:20 PM
845 Posts
Joined Mar 2012
Yesterday 08:20 PM
lleung1980Yesterday 08:20 PM
845 Posts
Is it even a good idea to get those plus solar panels to use it as EV charging only?

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Yesterday 09:14 PM
5,692 Posts
Joined Dec 2004
Yesterday 09:14 PM
CaleoYesterday 09:14 PM
5,692 Posts
Quote from lleung1980 :
Is it even a good idea to get those plus solar panels to use it as EV charging only?
It'd be one of the more expensive ways to do it tbh.. depending how fast you want to charge (and how many solar panels you want to use), you could do probably do so with a Delta Pro 3 at a much lower cost.
Yesterday 09:49 PM
1,396 Posts
Joined Nov 2008
Yesterday 09:49 PM
EchoTonyYesterday 09:49 PM
1,396 Posts
If you have high rates, these start to make sense if you can use it with solar and/or TOU rates. You basically fill it at night when rates are low and draw on it when rates or high. Alternatively, you fill it with solar power and use during peak times or as an offset to regular grid power.

This is a clean solution for those who don't want to put much effort into building a system. I would recommend you search YouTube for "DIY Solar Power with Will Prowse" to learn about how it all works and what are the best options for your situation. His voice is the only issue I have with his channel.
2
Yesterday 11:23 PM
40 Posts
Joined May 2020
Yesterday 11:23 PM
cm1816Yesterday 11:23 PM
40 Posts

Our community has rated this post as helpful. If you agree, why not thank cm1816

Quote from Sherbertine :
Am I nuts or is this really expensive? Look at an Ioinq 5 which is an EV with a 77.4kwh battery. It's also a car. It has over 4x the capacity of this unit but you can get them used for less than quadruple the cost of this pack. Oh, and every Ioniq 5 has V2L which allows you to use the vehicle as a backup battery for your house. And you get a vehicle along with the battery pack. I guess it takes more space and all that but it's a vehicle! With all the extra bits and bobs that come with it. A bit apples to oranges comparison I'm well aware but I feel the prices on these units need to come way down.
V2L does not mean it can power your house. It means it can power a couple of loads max — in the case of the Hyundai, only two 120v loads up to a total of 3.6kW. It would be difficult to plug the car into your home electrical panel without other equipment and/or non-NEC-approved wiring, and even if you did it wouldn't power an electric dryer, water heater, or any other 240v appliance.Out of the box the Delta does 7.2kW, can be connected to a panel, and provide 240V of power. So they are different use cases.All that said, in terms of raw dollars per kWh of battery, this isn't a good deal, but you're paying for the convenience of not building out a system with separate batteries, inverter, charge controller, etc.
1
Yesterday 11:35 PM
8 Posts
Joined Aug 2013
Yesterday 11:35 PM
YY3995Yesterday 11:35 PM
8 Posts
can I use this to power the whole guest house and off-grid completely?
Yesterday 11:48 PM
1,925 Posts
Joined Aug 2015
Yesterday 11:48 PM
RedflyerYesterday 11:48 PM
1,925 Posts
Quote from spydrmon :
so if I use 1k watt an hour constant for my basic items, this $7600 will not even last a day on a rainy stormy or cloudy day. I don't see the draw really for that kind of money.

For diyers who know what they are doing 100kwh batteries on Aliexpress are $3.5k but they don't necessarily have all the certifications name brands batteries like this have.
1
1
Today 02:14 AM
3,153 Posts
Joined Jan 2004
Today 02:14 AM
warlock110Today 02:14 AM
3,153 Posts
Quote from sg14all :
I had mine installed by an electrician, paid $1100 if you use ecoflow recommended installer it costs around $2100 min

I noticed that they ask for 2k for the install, can you let me know how did you find an electrician in your area that will do this kind of job?

Thank you.
Today 09:04 AM
48 Posts
Joined Mar 2020
Today 09:04 AM
BeigeTable8880Today 09:04 AM
48 Posts
For this unit, this is a really good deal. I put together a diy setup using 4 48v server rack batteries and an all in one hybrid inverter. Pros and cons. This system requires very little know how and from a cost per kwh perspective is not too bad, especially compared to what this would have cost just a couple of years ago. If you want a 'set it up and forget about it solution to use in an emergency', this is a good option, if you're not price sensitive.
My diy system, which I just put together this year, consists of 4 48v ecoworthy server rack batteries in a rack and an SRNE 10kw all in one inverter. My specs are 20.96 kwh storage and 10kw of continuous power vs. 18 and 7.2 for the ecoflow. A diy system is very easy to scale and is repairable should some cells fail or degrade.
I paid roughly $3300 for the batteries (rack was included) and $1555 for the inverter. With a few wires and a power distribution panel I have invested roughly $5000 for a system which outperforms this deal by a bit.
If all of the details confuses you it confused me a few months ago, too. It really isn't complicated though, it just takes some studying. I consider it a useful life skill to have and am glad I've learned it.

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Today 09:13 AM
48 Posts
Joined Mar 2020
Today 09:13 AM
BeigeTable8880Today 09:13 AM
48 Posts
Quote from YY3995 :
can I use this to power the whole guest house and off-grid completely?
Without some way to charge the unit (solar panels), no. If you had panels then the answer depends on usage and power demand.

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