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popular Posted by David_David • Yesterday
popular Posted by David_David • Yesterday

EcoFlow RIVER 3 Plus Smart Extra Battery EB600 $319.99

$320

$418

23% off
EcoFlow
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Costco NEXT Ecoflow has added River 3 Plus Plug and Play EXTRA Batteries at discounted prices

EB300 (286Wh) $159.99 (regular $209-269 Ecoflow Direct/Amazon)
EB600 (572Wh) $319.99 (regular $418-549 Ecoflow Direct/Amazon)

EB600 Plug and Play Triples the capacity of River 3 Plus/Wireless from 286Wh to 858Wh.
Adds USB-C port for USB-Input charging

Good pickup for all those who bought the Costco River 3 Plus Wireless deal to add capacity.

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

https://costco.ecoflow.com/produc...tery-eb600
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Deal Details
Community Notes
About the Poster
Costco NEXT Ecoflow has added River 3 Plus Plug and Play EXTRA Batteries at discounted prices

EB300 (286Wh) $159.99 (regular $209-269 Ecoflow Direct/Amazon)
EB600 (572Wh) $319.99 (regular $418-549 Ecoflow Direct/Amazon)

EB600 Plug and Play Triples the capacity of River 3 Plus/Wireless from 286Wh to 858Wh.
Adds USB-C port for USB-Input charging

Good pickup for all those who bought the Costco River 3 Plus Wireless deal to add capacity.

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

https://costco.ecoflow.com/produc...tery-eb600

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4 Comments

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Yesterday
321 Posts
Joined Sep 2013
Yesterday
RikB
Yesterday
321 Posts
This product and it's pricing just doesn't make sense to me. It's neat that you can expand the capacity of the R3P, but it should be $200-250 normally. The R3P frequently goes on sale for $180-200 so buying 3 seperate main units would be smarter than 1 r3p+expansion. Even with this you still get less capacity than a delta 2 and youre limited by the 600 watt/3 outlet output.

Delta 2 has been popping up at $350 refurbished. If you need the UPS feature then the Delta 3 refurb has been <$500 recently. A R3P+EB600 on sale is still $500 and is physically the same size as the Delta units but worse in battery capacity and max output.
1
Original Poster
Pro
Yesterday
59 Posts
Joined Mar 2025
Yesterday
David_David
Yesterday
Original Poster
Pro
59 Posts
The name of this game is size, portability and use case. And of course assuming you already have a R3P.
R3P Extra Battery also adds USB-C input charging convenience.

You make valid considerations, but also brand new vs Refurb pricing you mention isn't reasonable comparison. Of Course refurbs are less, but also Refurbs aren't for everyone.
River 3 Plus +EB is not same physical size, and considerably smaller and lighter than ANY delta (including Delta Mini long retired and discontinued)
River 3 Plus is also latest current model, all the latest app features, <10ms UPS and ultra-quiet. D2 is very loud and slower switch over.
2
Yesterday
152 Posts
Joined May 2012
Yesterday
jcricket006
Yesterday
152 Posts
Quote from RikB :
This product and it's pricing just doesn't make sense to me. It's neat that you can expand the capacity of the R3P, but it should be $200-250 normally. The R3P frequently goes on sale for $180-200 so buying 3 seperate main units would be smarter than 1 r3p+expansion. Even with this you still get less capacity than a delta 2 and youre limited by the 600 watt/3 outlet output.

Delta 2 has been popping up at $350 refurbished. If you need the UPS feature then the Delta 3 refurb has been <$500 recently. A R3P+EB600 on sale is still $500 and is physically the same size as the Delta units but worse in battery capacity and max output.
I agree. I have the R3P and I really like it, however I also don't see a point in these expansion batteries at this price. Once you attach one of these, the R3P is no longer that portable and not THAT much lighter than something like the Delta 3 Plus (10lb difference). If I needed more wattage, I would honestly rather get one of the larger ecoflow units or another R3P.
Yesterday
579 Posts
Joined Nov 2017
Yesterday
Rudedog7
Yesterday
579 Posts
Been waiting for the price to drop on these even more. I was able to hookup an existing 100ah battery to my River 3+ with a ring connector to xt60 connector. It's for a backup on a server rack so I haven't had to worry about charging it really.

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