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curro 23.9K Views
May 16, 2026 9:33 PM

Costco Members: EcoFlow River 3 Plus 286Wh Wireless Boost Combo

$200

$280

28% off
+ Free S&Hat Costco Wholesale
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Costco Wholesale has for their Members: EcoFlow River 3 Plus 286Wh Wireless Boost Combo (EFR3PLUS-W+RP5KPIN-US-CBOX) on sale for $199.99. Shipping is free.

Thanks to Community Member curro for sharing this deal.

About this Item:
  • 286Wh Capacity for Outdoor Recreation, Daily Backup, Home Office & Gaming
  • 2pcs 5000mAh RAPID Magnetic Power Banks Enjoy a Swap and Share Fast Charging
  • EcoFlow River 3 Plus Wireless: 600W Rated Output, Surge 1200W AC Output
  • EcoFlow River 3 Plus Wireless: <10 ms Pro-grade UPS, 1-hr Fast Charging
  • Power Bank: 15W Wireless Charging, 30W Cable Charging, 0% to 70% in 33-min

Editor's Notes

Written by Neo45 | Staff
  • This price matches our March '26 Frontpage Deal.
  • Rated 4.4 out of 5 stars from customer reviews.
  • Valid 5/16/26 through 5/31/26. While supplies last.

Original Post

Written by curro
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for their Members: EcoFlow River 3 Plus 286Wh Wireless Boost Combo (EFR3PLUS-W+RP5KPIN-US-CBOX) on sale for $199.99. Shipping is free.

Thanks to Community Member curro for sharing this deal.

About this Item:
  • 286Wh Capacity for Outdoor Recreation, Daily Backup, Home Office & Gaming
  • 2pcs 5000mAh RAPID Magnetic Power Banks Enjoy a Swap and Share Fast Charging
  • EcoFlow River 3 Plus Wireless: 600W Rated Output, Surge 1200W AC Output
  • EcoFlow River 3 Plus Wireless: <10 ms Pro-grade UPS, 1-hr Fast Charging
  • Power Bank: 15W Wireless Charging, 30W Cable Charging, 0% to 70% in 33-min

Editor's Notes

Written by Neo45 | Staff
  • This price matches our March '26 Frontpage Deal.
  • Rated 4.4 out of 5 stars from customer reviews.
  • Valid 5/16/26 through 5/31/26. While supplies last.

Original Post

Written by curro

Community Voting

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Why are you downvoting this deal?

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Top Comments

tenderidol
20.1KComments
9KReputation
Refurb is still available for that price at eBay, but it comes with one 5000mAh Fast Power Bank, instead of two at Costco. It possibly doesn't cost $40, but it should be included in the comparison of "new vs. refurb, one power bank vs two, 30 day return vs lifetime, etc."
Go to Comment
Ahchuu
37Comments
10Reputation
I have one of these and I wouldn't buy one especially if you plan to use it as a UPS and even more so for networking gear. I have one and it has been such a disappointment. You cannot update this and have the AC inverter running. So this means your networking gear will be shut off. This would be ok if it actually downloaded the update first before turning off the AC inverter. When I need to update this, I have to connect it to my cell phones hotspot and my entire network is down while it updates. Such a pain in the ass. The second major flaw if this device has to do with the LFP batteries and the device keeping its charge/discharge calibration curve. Over time (I am talking like 1 or 2 months) the device loses how much charge it has. Then when power is lost it will quickly run to zero (this like 2 minutes) and shut off. You then have to charge and discharge the device 3 times before the charge/discharge calibration curve is reset, then then it will last for 4 hours for the load I run on the device.
I really love EcoFlows software, but this device has been a giant disappointment for using it as a UPS especially for networking gear. Do not waste your money on this. I've wasted too much of my life dealing with Ecoflow support and having them screw me. I'd wait for the River 4 Plus and wait for some reviews first before I would buy anything from Ecoflow to use as a UPS.
I would cancel your order as fast as you can, just a heads up so that you don't have to deal with all the pain and suffer I did.
Go to Comment
silentalarm
793Comments
664Reputation
In for 1 for the primary use as a UPS for my Synology DS920+, Netgear CM3000 modem, and Netgear RS300 router. Total draw is roughly 60-80 watts so this will provide an estimated 3.5 - 4 hour runtime incase anyone is looking to do a similar UPS set up. Good peace of mind buying from Costco since it should also be exempt from the 90-day electronics return policy (classified as generator so basically lifetime). Also includes EcoFlow's 5 year warranty on the power station (2 years on the power banks).
Go to Comment

Community Reviews

The River 3 Plus bundle stands out as a compact UPS and backup power station for home networking gear, desktops, and small server setups. It can deliver around 3.5 to 4 hours for a 60 to 80 watt load, and the 10 millisecond UPS failover is praised for keeping power blips invisible. Costco adds a strong warranty and return policy, while the extra power bank is useful for some and less valuable for others. The main caveat is that UPS behavior is not fully plug and play, with firmware updates, calibration, and USB shutdown setup requiring attention. It is a practical option if you want portable backup power and can live with some management.

  • The River 3 Plus can provide roughly 3.5 to 4 hours of runtime for a 60 to 80 watt UPS-style load setup.

    silentalarmuserbeavis

  • The River 3 Plus can fail over to battery power and restore AC after complete outages in real-world use.

    userbeavisRikB

  • The River 3 Plus can be used with a USB connection to manage PC shutdown, though it may require setup.

    userbeavispricesniper

  • The Costco purchase can offer a longer warranty structure, with a 5-year warranty on the power station and 2 years on the power banks.

    silentalarm

  • Firmware updates can disrupt UPS operation by turning off AC inverter output during the update process.

    AhchuuTidalWaveOne

  • Battery calibration and charge retention can degrade within 1 to 2 months, which can lead to near-immediate shutdown after power loss.

    AhchuuTidalWaveOne

  • USB shutdown control may not work on a NAS without additional NUT server setup and configuration.

    RikBpricesniper

  • The unit can cut AC power unexpectedly even under about 600W load, and it may lack advertised surge protection.

    TidalWaveOne

Common Questions (5)

AI-generated summary based on comments from the community. Updated ago

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44 Comments

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May 18, 2026 3:09 AM
1.8K Comments
Joined Nov 2007
phillip9May 18, 2026 3:09 AM
1.8K Comments
FYI

Regarding ups features


https://www.reddit.com/r/Ecoflow_...4dvrwSazPq
May 18, 2026 3:44 AM
334 Comments
Joined Mar 2024
OliveAlpaca1201May 18, 2026 3:44 AM
334 Comments
Quote from kensteele View quoted comment :
Refurb was $159 on eBay; ecoflow refurbs from ecoflow are pretty good.
Rebufb can't compare to brand new....
May 18, 2026 10:02 AM
1.4K Comments
Joined Nov 2010
JusthathoughtMay 18, 2026 10:02 AM
1.4K Comments
Was $1,399.99, now $1,200 off?
May 18, 2026 10:23 AM
141 Comments
Joined Apr 2008
njp1956May 18, 2026 10:23 AM
141 Comments
Quote from Justhathought View quoted comment :
Was $1,399.99, now $1,200 off?
I saw that, I was surprised it was not even mentioned in this thread earlier
May 18, 2026 1:24 PM
35 Comments
Joined Mar 2023
FaithfulMitten852May 18, 2026 1:24 PM
35 Comments
Good deal
May 18, 2026 3:50 PM
13.1K Comments
Joined Dec 2004
kensteeleMay 18, 2026 3:50 PM
13.1K Comments
Quote from OliveAlpaca1201 View quoted comment :
Rebufb can't compare to brand new....
Sometimes the refurb is better than the new unit.
1
1
May 19, 2026 12:45 AM
441 Comments
Joined Jan 2021
BeautifulLake409May 19, 2026 12:45 AM
441 Comments
Quote from njp1956 View quoted comment :
I saw that, I was surprised it was not even mentioned in this thread earlier
Actually it was

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May 19, 2026 3:49 AM
678 Comments
Joined Apr 2007
TheBay408May 19, 2026 3:49 AM
678 Comments
Quote from njp1956 View quoted comment :
I saw that, I was surprised it was not even mentioned in this thread earlier
yes my post
May 19, 2026 3:50 AM
678 Comments
Joined Apr 2007
TheBay408May 19, 2026 3:50 AM
678 Comments
delete
May 20, 2026 1:39 PM
252 Comments
Joined Apr 2005
humphhMay 20, 2026 1:39 PM
252 Comments
EB300 on sale for $119 at Costco Next.

Worth it if you have the Ecoflow River 3 Plus?
Pro
May 21, 2026 1:50 PM
13.9K Comments
Joined Apr 2005
TidalWaveOne
Pro
May 21, 2026 1:50 PM
13.9K Comments
Quote from humphh View quoted comment :
EB300 on sale for $119 at Costco Next.

Worth it if you have the Ecoflow River 3 Plus?
Totally depends on your use case.
Pro
May 21, 2026 3:29 PM
563 Comments
Joined Jan 2015
pricesniper
Pro
May 21, 2026 3:29 PM
563 Comments
Quote from RikB View quoted comment :
I've had 3 of these deployed for just over a year now. 1 is on a server PC, 1 on a synology nas and 1 on a ubiquiti rack. Once you turn them on, they just stay on, and in the app you can't set a charge limit to whatever % you want (I do 80%). Once they are charged they just passthrough AC and if they die completely in an outage they will turn everything back on when they power back up.The biggest downsides are manual firmware updates cause the device to turn off and reboot so you have to plan around that before you hit update, the USB connection for initiating shutdown doesn't work on the NAS, and there's no software schedule to discharge and recharge the batteries automatically. All that being said I've had the power going out for less than 1 hour multiple times and these things held strong. I used to have two APC UPS running everything but I got sick of those saying they had 1 hour of runtime, then the power went out and they'd shut down in 1 minute and I'd be ordering new batteries again.
You can use the USB to initiate a UPS shutdown but it requires installing a NUT server (Docker instance on a Synology or RPi). It's not plug-and-play but can be done with some tinkering.
May 22, 2026 7:49 PM
2K Comments
Joined Oct 2006
revere04May 22, 2026 7:49 PM
2K Comments
Will this keep a fridge on for a few hours?
Pro
May 23, 2026 2:59 PM
13.9K Comments
Joined Apr 2005
TidalWaveOne
Pro
May 23, 2026 2:59 PM
13.9K Comments
Quote from revere04 View quoted comment :
Will this keep a fridge on for a few hours?
Maybe a small one that uses only 50-100 watts.

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