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David_David 19.9K Views
Aug 3, 2026 11:48 PM

Costco Members: EcoFlow River 3 Plus Wireless Boost Combo

$200

$280

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

Thanks to Community Member David_David 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 slickdewmaster | Staff
  • This price matches the previous Frontpage Deal which received over 50 Thumbs Up from the community.
  • Rated 4.4 out of 5 stars from 190+ customer reviews.
  • $80 manufacturer's savings is valid 8/3/26 through 8/16/26 or while supplies last.
  • If you don't have a Costco Warehouse Membership, you can sign up here.
  • Details of Costco's return policy here.

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 River 3 Plus Wireless Boost Combo (EFR3PLUS-W+RP5KPIN-US-CBOX) on sale for $199.99. Shipping is free.

Thanks to Community Member David_David 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 slickdewmaster | Staff
  • This price matches the previous Frontpage Deal which received over 50 Thumbs Up from the community.
  • Rated 4.4 out of 5 stars from 190+ customer reviews.
  • $80 manufacturer's savings is valid 8/3/26 through 8/16/26 or while supplies last.
  • If you don't have a Costco Warehouse Membership, you can sign up here.
  • Details of Costco's return policy here.

Original Post

Written by David_David

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Top Comments

TidalWaveOne
13.9KComments
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Beware of using this as a UPS! I was impressed at first, using as a UPS but there are serious issues with the unit cutting AC power and turning off my computer, NAS, switch, and other devices for seemingly no reason even with the latest firmware (and I was no where near overloading the 600 watt capacity). Also there is no advertised surge protection, so I bought a good surge protector and then plugged the EcoFlow into it. Also these units won't go to battery power if the input AC voltage gets too low or too high (or it will but the voltage limits are unsatisfactory (too low/high) for a computer UPS). And EcoFlow support told me (on 2026-03-12) "it is recommended to perform a full charge and discharge cycle once per month". I assume this is to maintain battery health and ensure the Battery Management System (BMS) remains accurately calibrated but there is no automated way to do this and no way to do it knowing that the AC outputs will stay on even if plugged into a wall outlet. EcoFlow support (on 2026-03-23) also told me to avoid using the device as a UPS during SOC (state of charge) calibration. This means every month you're suppose to stop using the device as a UPS, fully charge and discharge the battery, then charge it again and then you can use it as a UPS for another month until which time you have to do this all over again. Who wants to have a UPS like this especially if it is a UPS for devices that need to stay on or risk corruption?
Using the 'backup reserve' feature to manually discharge the batteries will likely cut your AC power off even when the unit is still plugged into the grid, as it has done multiple times for me even with the unit indicating the battery is still at 20% or over (and with less than a 300 watt load). Updating the firmware also shuts off AC power. Unexpectedly shutting off the AC power when plugged into the grid is not acceptable for a UPS. My CyberPower UPS units didn't have these issues. I'm not happy that this has still not been fixed and EcoFlow support has been no help. In my opinion, these River 3 Plus units are definitely not "pro-grade" or "premium" UPS units. If they were then they wouldn't shut off AC power unexpectedly and you wouldn't have to manually baby the unit every month by discharging and recharging manually. This becomes even more of an issue if you have multiple units because you have to manually manage each one.
Furthermore, according to AI, using an extra battery, like an EB300 or EB600, can increase the liklihood of unexpected AC power shutoffs "due to complex battery communication and handover logic".
The only reliable "solution" I have found to this is to use a normal lead acid battery UPS (like APC or CyberPower) plugged into the EcoFlow. I put my most critical devices on it (like computers and NAS) so they stay on when the EcoFlow fails to keep the AC power on. Other non-critical items that aren't such a big deal if they get powered off (i.e. smart devices, monitors, speakers, accessories) are not on the lead acid UPS and are directly connected to the EcoFlow AC output.
Reddit thread with more info:
https://www.reddit.com/r/Ecoflow_...lus_delta/
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David_David
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brand new with two power banks is costco exclusive and $199.99 matches all time low. $139/159 maybe for refurb and only one power bank
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25 Comments

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Aug 4, 2026 11:40 PM
1.4K Comments
Joined Feb 2011
ss115891Aug 4, 2026 11:40 PM
1.4K Comments
No comments? From the price history, it has gone low to $139, $159. I can wait for better procing.
Aug 4, 2026 11:47 PM
409 Comments
Joined Mar 2018
bradymartinAug 4, 2026 11:47 PM
409 Comments
$200 is lowest ive seen and it sold out. but at $139 id buy.
what connector does this have for solar panel? is it xt60? doesnt say in specs.
Last edited by bradymartin August 4, 2026 at 04:51 PM.
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Aug 5, 2026 3:39 AM
351 Comments
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David_DavidAug 5, 2026 3:39 AM
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351 Comments

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Quote from ss115891 View quoted comment :
No comments? From the price history, it has gone low to $139, $159. I can wait for better procing.
brand new with two power banks is costco exclusive and $199.99 matches all time low. $139/159 maybe for refurb and only one power bank
Last edited by David_David August 6, 2026 at 06:21 AM.
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Original Poster
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Aug 5, 2026 3:43 AM
351 Comments
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David_DavidAug 5, 2026 3:43 AM
Original Poster
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Quote from bradymartin View quoted comment :
$200 is lowest ive seen and it sold out. but at $139 id buy.
what connector does this have for solar panel? is it xt60? doesnt say in specs.
yes the solar input is XT60/i - 11-55VāŽ“13A, 220W Max
1
Aug 6, 2026 5:38 AM
893 Comments
Joined Dec 2011
errdayalldayAug 6, 2026 5:38 AM
893 Comments
Quote from bradymartin View quoted comment :
$200 is lowest ive seen and it sold out. but at $139 id buy.
what connector does this have for solar panel? is it xt60? doesnt say in specs.
True at $139 is fair, but at $99 I'd get 2.
Aug 6, 2026 3:11 PM
1.2K Comments
Joined Feb 2006
FlipBumWallaAug 6, 2026 3:11 PM
1.2K Comments
I'll wait for $139, too
Aug 6, 2026 3:17 PM
433 Comments
Joined Nov 2007
dungeonlaaAug 6, 2026 3:17 PM
433 Comments
Can it be used in a shed just for lighting especially in winter time?

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Aug 6, 2026 3:36 PM
6.8K Comments
Joined Dec 2004
CaleoAug 6, 2026 3:36 PM
6.8K Comments

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Quote from dungeonlaa View quoted comment :
Can it be used in a shed just for lighting especially in winter time?
Not advisable unless you live in an area that doesn't see below-freezing temps much. LFP batteries don't like operating (charging in particular) in below-freezing temps.
1
Aug 6, 2026 3:42 PM
433 Comments
Joined Nov 2007
dungeonlaaAug 6, 2026 3:42 PM
433 Comments
Quote from Caleo View quoted comment :
Not advisable unless you live in an area that doesn't see below-freezing temps much. LFP batteries don't like operating (charging in particular) in below-freezing temps.
Thank you, I am in Mass so no go, just trying to avoid digging a trench
Aug 6, 2026 5:03 PM
508 Comments
Joined Feb 2010
PythonzAug 6, 2026 5:03 PM
508 Comments
Quote from dungeonlaa View quoted comment :
Thank you, I am in Mass so no go, just trying to avoid digging a trench
I would think you'd be ok for just lighting. Battery won't last as long in winter, but might be ok, and would be fine most of the year anyway.
Aug 6, 2026 5:04 PM
726 Comments
Joined Sep 2007
SlickPatAug 6, 2026 5:04 PM
726 Comments
Appreciate if someone can kindly recommend one that will power my refrigerator and one for my furnace just in my power goes out. Thank you!
Aug 6, 2026 5:57 PM
1.5K Comments
Joined Dec 2005
thrustbucketAug 6, 2026 5:57 PM
1.5K Comments
I have this and can't get it to connect to Bluetooth to use the app
Aug 6, 2026 6:31 PM
250 Comments
Joined Mar 2012
ZipsortAug 6, 2026 6:31 PM
250 Comments
Quote from dungeonlaa View quoted comment :
Thank you, I am in Mass so no go, just trying to avoid digging a trench
Just get solar lights on amazon. I got some at costco, the solar panel is connected by a wire you can mount on the roof and then put the light inside
Original Poster
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Aug 6, 2026 6:52 PM
351 Comments
Joined Mar 2025
David_DavidAug 6, 2026 6:52 PM
Original Poster
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351 Comments
Quote from SlickPat View quoted comment :
Appreciate if someone can kindly recommend one that will power my refrigerator and one for my furnace just in my power goes out. Thank you!
for fridge you'd really want 120v houshold equivalent 15A AC output (not a river series) and suggest minimum 1kWh capacity power station (like a delta series) for any reasonable minimal runtime. Fridge don't consume that much but when compressor kicks in can surge.
furnace depends on specs but you'll likely need something with higher output because of the surge/spike
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Aug 6, 2026 8:14 PM
109 Comments
Joined Dec 2007
domainAug 6, 2026 8:14 PM
109 Comments
Quote from thrustbucket View quoted comment :
I have this and can't get it to connect to Bluetooth to use the app
I had the same problem. I had to create a guest network separately and it connected. I think it can only connect to 2.4 GHz and it got confused if you have both 2.4 GHz and 5GHz available

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