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popularDavid_David posted Nov 07, 2025 11:28 AM
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popularDavid_David posted Nov 07, 2025 11:28 AM

EcoFlow DELTA 2 MAX Smart Extra Battery (LFP) - 2 pack $1189.99 @ CostcoNext

$1,190

$1,699

29% off
Costco Wholesale
2 Comments 3,075 Views
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Costco NEXT has Delta 2 Max Extra Battery 2 pack on special promo price $1189.99 !

(at under $600 this matches all time low and previous front page deal)

Requires Main Unit.
Delta 2 Max Extra Battery = 2048kWh EACH.

Increase the capacity of DELTA Max, and DELTA 2 Max with an extra 4096Wh
Embrace the 3000+ charging cycles enabled by the LFP battery chemistry
Plug-and-play without setup
Comprehensive 5-year warranty to ensure your peace of mind

Need to be Costco member. Logged into account, and click thru to Ecoflow Costco Next Portal costco.ecoflow.com

https://costco.ecoflow.com/produc...k-for-2pcs
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Deal Details
Community Notes
About the Poster
Costco NEXT has Delta 2 Max Extra Battery 2 pack on special promo price $1189.99 !

(at under $600 this matches all time low and previous front page deal)

Requires Main Unit.
Delta 2 Max Extra Battery = 2048kWh EACH.

Increase the capacity of DELTA Max, and DELTA 2 Max with an extra 4096Wh
Embrace the 3000+ charging cycles enabled by the LFP battery chemistry
Plug-and-play without setup
Comprehensive 5-year warranty to ensure your peace of mind

Need to be Costco member. Logged into account, and click thru to Ecoflow Costco Next Portal costco.ecoflow.com

https://costco.ecoflow.com/produc...k-for-2pcs

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Nov 07, 2025 01:00 PM
1,317 Posts
Joined Dec 2008
madcow3417Nov 07, 2025 01:00 PM
1,317 Posts
There's a trick to access the 48V battery from the accessory port on the main ecoflow units: jump a couple pins with a 1k resistor. I don't know if the same trick works on the extra batteries, but it would allow you to use this as more than a slave to the main units.
Nov 10, 2025 06:54 PM
72 Posts
Joined Jan 2006
ezwrighterNov 10, 2025 06:54 PM
72 Posts
Cost/wh = $.29/wh pretty darn expensive IMHO. Especially when you can get decent native 48v system down to under $.11/wh@32kwh or $.12@16kwh (Not UL listed, but rated well among DIY users) https://yixiangpower.com/collecti...ttery-pack If you really need UL listing, eco-worthy has their 100ah rack server batteries at about $.16/wh https://www.eco-worthy.com/produc...ck-battery

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