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David_David 25.4K Views
Dec 5, 2025 8:19 PM

Costco Members: Ecoflow Delta Pro Ultra Whole-Home Power 12 KWH Solution

$4,500

$7,000

35% off
+ Free Shippingat Costco Wholesale
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Deal Details
Costco Wholesale has for its Members: Ecoflow Delta Pro Ultra Whole-Home Power 12 KWH Solution (1814789) on sale for $4499.99. Shipping is free.

Thanks Community Member David_David for sharing this deal

Includes:
  • 1x EcoFlow DELTA Pro Ultra Inverter
  • 2x EcoFlow DELTA Pro Ultra Battery
  • 1x EcoFlow DELTA Pro Ultra Trolley
Features:
  • Scalable 12kwh 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 slickdewmaster | Staff
  • About this Offer:
    • This sale price is $1,500 less than this previous FrontPage Deal from May 2024 which received over 40 Thumbs Up from the community.
    • $2500 manufacturer's savings is valid through 12/30/25. While supplies last. Limit 2 per member.
  • If you don't have a Costco Warehouse Membership, you can sign-up here
  • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.

Original Post

Written by David_David
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for its Members: Ecoflow Delta Pro Ultra Whole-Home Power 12 KWH Solution (1814789) on sale for $4499.99. Shipping is free.

Thanks Community Member David_David for sharing this deal

Includes:
  • 1x EcoFlow DELTA Pro Ultra Inverter
  • 2x EcoFlow DELTA Pro Ultra Battery
  • 1x EcoFlow DELTA Pro Ultra Trolley
Features:
  • Scalable 12kwh 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 slickdewmaster | Staff
  • About this Offer:
    • This sale price is $1,500 less than this previous FrontPage Deal from May 2024 which received over 40 Thumbs Up from the community.
    • $2500 manufacturer's savings is valid through 12/30/25. While supplies last. Limit 2 per member.
  • If you don't have a Costco Warehouse Membership, you can sign-up here
  • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.

Original Post

Written by David_David

Community Voting

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Top Comments

Community Reviews

EcoFlow Delta Pro Ultra is being framed as a serious whole home backup and peak rate battery system, with enough capacity to keep a house running for a while and strong value at this price. The trolley is included, though it only carries one 6 kWh battery, not the full 12 kWh setup. The federal 30 percent clean energy credit appears to apply to the battery and installation costs if the system is installed and placed in service by December 31, 2025. The main uncertainty is the offer language around installation and eligibility, which is still unclear. It looks most compelling for outage backup or high time of use rates, especially where electricity is expensive.

  • The trolley setup reportedly carries only one 6kWh battery, which can still make the overall package attractive.

  • The system can support whole-home backup use cases by running a house for a while during outages.

  • The federal Residential Clean Energy Credit can include battery storage technology at 3 kWh or greater when placed in service by the deadline.

  • The DPUX can deliver 12kW, which may reduce the need for additional hub hardware for a 50A house connection.

  • The offer language reportedly leaves installation requirements unclear, which creates uncertainty about what qualifies for the credit.

  • The unit may be treated as a mobile unit, which raises questions about whether it must be installed versus placed in service for the federal tax credit.

  • The deal page reportedly does not clearly describe the trolley details, and the pictured trolley may differ from the included tray.

  • The economics can fail for TOU use when peak spending is low, with repayment potentially exceeding 10 years for some usage patterns.

Common Questions (5)

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49 Comments

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Dec 5, 2025 9:01 PM
19 Comments
Joined Aug 2025
SmilingCatfish9325Dec 5, 2025 9:01 PM
19 Comments
The trolley only carries one battery (6kWh), but this is still a great deal.
Dec 5, 2025 9:09 PM
32 Comments
Joined Aug 2009
bruntDec 5, 2025 9:09 PM
32 Comments
These are becoming extremely attractive. I would jump on this except for the fact that we are looking at an international move somewhat soon. After that, I will get one. We have a bunch of the smaller ones for lights, fridges, freezers, sump pumps for when we lose power. Something this size would run our house for a while.
Dec 5, 2025 11:50 PM
629 Comments
Joined Nov 2017
Rudedog7Dec 5, 2025 11:50 PM
629 Comments
Quote from SmilingCatfish9325 View quoted comment :
The trolley only carries one battery (6kWh), but this is still a great deal.
Where are you taking this thing with a trolley? There are plenty of other options for portable battery systems even from Ecoflow.
Dec 6, 2025 12:13 AM
1.4K Comments
Joined Feb 2005
rb5505Dec 6, 2025 12:13 AM
1.4K Comments

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

The federal Residential Clean Energy Credit is set to expire for any expenditures made after December 31, 2025. This means that the property must be installed and placed in service by this deadline to qualify for the credit.
The credit, originally part of the Inflation Reduction Act of 2022 and scheduled to last through 2034, was accelerated to terminate at the end of 2025 with the signing of the "One Big Beautiful Bill Act" on July 4, 2025.
Key Details
Credit Amount: The credit is for 30% of the cost of new, qualified clean energy property for your home.
Eligible Improvements: Qualifying expenses include those for solar panels, solar water heaters, small wind turbines, geothermal heat pumps, and battery storage technology (capacity of 3 kWh or greater).
Limits: There is no annual or lifetime dollar limit on the credit amount for most qualifying property, but it is nonrefundable. Any excess credit can generally be carried forward to reduce tax in future years, provided the credit is still in effect.
How to Claim: To claim the credit, you must file IRS Form 5695 with your federal tax return for the tax year in which the property is installed and placed in service.
Homeowners considering these upgrades should act quickly to ensure installation is completed before the deadline. For more information on eligibility and to find other potential state or local incentives, you can consult a tax professional or use resources like the DSIRE database.
6
2
Dec 6, 2025 1:23 AM
1.3K Comments
Joined Nov 2012
i_max2k2Dec 6, 2025 1:23 AM
1.3K Comments
Quote from rb5505 View quoted comment :
The federal Residential Clean Energy Credit is set to expire for any expenditures made after December 31, 2025. This means that the property must be installed and placed in service by this deadline to qualify for the credit.
The credit, originally part of the Inflation Reduction Act of 2022 and scheduled to last through 2034, was accelerated to terminate at the end of 2025 with the signing of the "One Big Beautiful Bill Act" on July 4, 2025.
Key Details
Credit Amount: The credit is for 30% of the cost of new, qualified clean energy property for your home.
Eligible Improvements: Qualifying expenses include those for solar panels, solar water heaters, small wind turbines, geothermal heat pumps, and battery storage technology (capacity of 3 kWh or greater).
Limits: There is no annual or lifetime dollar limit on the credit amount for most qualifying property, but it is nonrefundable. Any excess credit can generally be carried forward to reduce tax in future years, provided the credit is still in effect.
How to Claim: To claim the credit, you must file IRS Form 5695 with your federal tax return for the tax year in which the property is installed and placed in service.
Homeowners considering these upgrades should act quickly to ensure installation is completed before the deadline. For more information on eligibility and to find other potential state or local incentives, you can consult a tax professional or use resources like the DSIRE database.
The installation part is a big unknown. No clear language towards it.
Dec 6, 2025 2:36 AM
115 Comments
Joined Dec 2019
CalmAction122Dec 6, 2025 2:36 AM
115 Comments
Quote from i_max2k2 View quoted comment :
The installation part is a big unknown. No clear language towards it.
I hate how vague it is with no clarification.
Dec 6, 2025 2:45 AM
598 Comments
Joined Sep 2014
junkpromoDec 6, 2025 2:45 AM
598 Comments
Does this unit qualify for the federal tax credit? The reason I ask is because Federal tax credit mentioned that it needs to be installed. This unit is considered a mobile unit and no installation is required. It either needs to be installed OR put into use or installed AND put into use?

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Dec 6, 2025 2:46 AM
1.3K Comments
Joined Nov 2012
i_max2k2Dec 6, 2025 2:46 AM
1.3K Comments
Quote from CalmAction122 View quoted comment :
I hate how vague it is with no clarification.
Hopefully it will work in our favor
Dec 6, 2025 4:12 AM
1.4K Comments
Joined Feb 2005
rb5505Dec 6, 2025 4:12 AM
1.4K Comments
Quote from i_max2k2 View quoted comment :
The installation part is a big unknown. No clear language towards it.
we got our 2024 30% tax rebate for a dpu w/1 battery (home depot one day $2899 sale), a delta 2 and a double voltage hub. this year we got another dpu battery (another home depot one day sale). then we had an electrician install an inlet plug next to the breaker box, then put an interlock switch in our panel, and then an inside/outside back to back inlet, to allow us to plug an lp generator (sitting outside) into our panel. that's if the dpu runs out & we can't recharge the dpu, due to not being able to have solar panels. we'll claim the 30% tax rebate on those expenses this year.
Dec 6, 2025 5:31 AM
359 Comments
Joined Oct 2011
opqDec 6, 2025 5:31 AM
359 Comments
They must be clearing out inventory of the Delta Pro Ultra to make room for the Ultra X…
Dec 6, 2025 12:20 PM
161 Comments
Joined Nov 2017
BBTangDec 6, 2025 12:20 PM
161 Comments
Dumb question, what type of connection do i need to use it power whole house?
Dec 6, 2025 12:22 PM
1.4K Comments
Joined May 2005
rsprayDec 6, 2025 12:22 PM
1.4K Comments
Quote from rb5505 View quoted comment :
we got our 2024 30% tax rebate for a dpu w/1 battery (home depot one day $2899 sale), a delta 2 and a double voltage hub. this year we got another dpu battery (another home depot one day sale). then we had an electrician install an inlet plug next to the breaker box, then put an interlock switch in our panel, and then an inside/outside back to back inlet, to allow us to plug an lp generator (sitting outside) into our panel. that's if the dpu runs out & we can't recharge the dpu, due to not being able to have solar panels. we'll claim the 30% tax rebate on those expenses this year.
Are you able to charge the DPU from the generator?
Dec 6, 2025 1:14 PM
4.3K Comments
Joined Sep 2005
Neo42Dec 6, 2025 1:14 PM
4.3K Comments
Temptation has shifted from a DPUX to this and.. do they make a hub to connect two dpu or is it just the smart panel?
Dec 6, 2025 1:16 PM
64 Comments
Joined Aug 2012
JohnR3968Dec 6, 2025 1:16 PM
64 Comments
Quote from i_max2k2 View quoted comment :
The installation part is a big unknown. No clear language towards it.
I agree - a while back I read it had to be installed by a contractor. (permits, invoices etc.)

I had an extensive 'chat' w/AIs about this - what 'it' said was it comes down to a check-list showing it's configured & running - this is simply incase of an audit.

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Dec 6, 2025 1:24 PM
1.1K Comments
Joined Jan 2010
noANANDformeDec 6, 2025 1:24 PM
1.1K Comments
Quote from Neo42 View quoted comment :
Temptation has shifted from a DPUX to this and.. do they make a hub to connect two dpu or is it just the smart panel?
I jumped on the 18kwh deal and haven't had an electrician install them yet, but perhaps this is what you need?

https://www.wellbots.com/products...50-amp-hub

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