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frontpageSkillful_Pickle | Staff posted Oct 06, 2025 04:46 PM
frontpageSkillful_Pickle | Staff posted Oct 06, 2025 04:46 PM

ECO-WORTHY 3584Wh 12V 280Ah Smart LiFePO4 Battery w/ Bluetooth

+ Free Shipping

$320

$400

20% off
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eco-worthy-us via eBay has ECO-WORTHY 3584Wh 12V 280Ah Smart LiFePO4 Battery w/ Bluetooth Monitoring on sale for $399.99 - 20% with coupon code HOLIDAYREADY at checkout = $319.99. Shipping is free.

Thanks to Staff Member Skillful_Pickle for sharing this deal.

About this Item:
  • Bluetooth and remote app monitoring to read the battery voltage, current, battery capacity and other important information
  • 200A BMS with multiple protections, including low-temperature protection (charging cut-off 19.4 F)
  • Supports up to 4 batteries in parallel, providing 1120Ah at 12V ideal for RVs, or 4 in series ideal for 48V solar power systems
  • High-strength metal frame, Grade A cells
  • 6000-15000 long life cycles & 10-Year life
  • 17.8 x 9.37 x 8.7" (61.7 lbs)

Editor's Notes

Written by SaltyOne | Staff
  • This price matches our September '25 Frontpage Deal.
  • At the time of this posting, our research indicates that this is $36.70 lower than the next best comparable online prices starting from $356.69.
  • Returns: 30 days returns. Seller pays for return shipping.

Original Post

Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
eco-worthy-us via eBay has ECO-WORTHY 3584Wh 12V 280Ah Smart LiFePO4 Battery w/ Bluetooth Monitoring on sale for $399.99 - 20% with coupon code HOLIDAYREADY at checkout = $319.99. Shipping is free.

Thanks to Staff Member Skillful_Pickle for sharing this deal.

About this Item:
  • Bluetooth and remote app monitoring to read the battery voltage, current, battery capacity and other important information
  • 200A BMS with multiple protections, including low-temperature protection (charging cut-off 19.4 F)
  • Supports up to 4 batteries in parallel, providing 1120Ah at 12V ideal for RVs, or 4 in series ideal for 48V solar power systems
  • High-strength metal frame, Grade A cells
  • 6000-15000 long life cycles & 10-Year life
  • 17.8 x 9.37 x 8.7" (61.7 lbs)

Editor's Notes

Written by SaltyOne | Staff
  • This price matches our September '25 Frontpage Deal.
  • At the time of this posting, our research indicates that this is $36.70 lower than the next best comparable online prices starting from $356.69.
  • Returns: 30 days returns. Seller pays for return shipping.

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Top Comments

DealMongr
158 Posts
25 Reputation
Same here. I'm using a series pair as backup power for an ECO-FLOW Delta 3 Plus power station. I've also learned that the BMS within can be monitored/adjusted with the "Overkill Solar" app, a level of info depth and control beyond what the Eco-Worth app provides.

Also comes in at around $0.09/watt-hour

39 Comments

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Oct 09, 2025 04:10 AM
35 Posts
Joined Dec 2009
PhilabongOct 09, 2025 04:10 AM
35 Posts
Quote from Hoodah :
Quote from DealMongr :
Quote from TheNetGuy
:
Very happy with mine. Using it in a boat as a house battery.

Same here. I'm using a series pair as backup power for an ECO-FLOW Delta 3 Plus power station. I've also learned that the BMS within can be monitored/adjusted with the "Overkill Solar" app, a level of info depth and control beyond what the Eco-Worth app provides.

Also comes in at around $0.09/watt-hour
How are you using it as backup power? Are you connecting it to the solar input of the ECO-FLOW?
Not an Eco Flow, but with an Anker C1000. I wired 2 in series and a 10g ring terminal to xt60 wire. I plan on adding 2 more which will give me 600w transfer and almost 10x capacity. My use case is very narrow, though. More economical paths with similar outcomes.
Oct 09, 2025 04:29 AM
37 Posts
Joined Nov 2013
Mavaj2001Oct 09, 2025 04:29 AM
37 Posts
Fast Charge Your Large Power Station

https://www.youtube.com/shorts/OMUHQXvvYCw
Pro
Oct 09, 2025 04:37 AM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Oct 09, 2025 04:37 AM
1,727 Posts
Quote from lh.cs :
Any similar good deal on a good value 48v(51v) battery with BMS?
That would be awesome. People might mistakenly suggest purchasing 4 of these in series, but that's not what we/I am asking for - I'm asking for a "native" 48v battery (so 48v,, 320Ah battery)
Pro
Oct 09, 2025 04:58 AM
1,559 Posts
Joined Dec 2005
alphawave
Pro
Oct 09, 2025 04:58 AM
1,559 Posts
Quote from jongasse :
That would be awesome. People might mistakenly suggest purchasing 4 of these in series, but that's not what we/I am asking for - I'm asking for a "native" 48v battery (so 48v,, 320Ah battery)
Y'all are looking for a rack battery 48V 100AH, weighs in at nearly 100#. Eco-worthy has a benchmark example that now has UL Listings and will soon be published on California Energy Commissions Solar Equipment List, used for certified permitted installs in California.


https://www.energy.ca.gov/program...ment-lists

https://www.ebay.com/itm/12671549...Swd8po5Gu0
Last edited by alphawave October 8, 2025 at 11:00 PM.
Oct 09, 2025 02:17 PM
676 Posts
Joined May 2008
wiebel03Oct 09, 2025 02:17 PM
676 Posts
Quote from jongasse :
That would be awesome. People might mistakenly suggest purchasing 4 of these in series, but that's not what we/I am asking for - I'm asking for a "native" 48v battery (so 48v,, 320Ah battery)
320Ah 48v is massive and unlikely to be found. It'd be too dense and heavy to carry. For reference this 280ah 12v battery is ~3700 wh, whereas a 320Ah 48v is ~16,900 wh which is 450% larger in size.

A 70ah 48v battery is equivalent to a 280ah 12v battery, just an fyi (52.8 x 70 = 13.2 x 280)
Pro
Oct 09, 2025 02:44 PM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Oct 09, 2025 02:44 PM
1,727 Posts
Quote from wiebel03 :
320Ah 48v is massive and unlikely to be found. It'd be too dense and heavy to carry. For reference this 280ah 12v battery is ~3700 wh, whereas a 320Ah 48v is ~16,900 wh which is 450% larger in size.

A 70ah 48v battery is equivalent to a 280ah 12v battery, just an fyi (52.8 x 70 = 13.2 x 280)
You are absolutely correct and Thank You for the correction. I noticed it last night but didn't think anyone would care or notice. My excuse for this messup was that my brain was fried from reading too many Prime day deals Embarrassment

I am hoping for some 48v 70ah deals (~$300). They are pretty hard to find Frown

Also, I am jealous of people in the EU boasting about their 1000 EUR 20kWh used EV battery packs - any idea if and when we in the U.S. will get to enjoy that (except the leaf EV batteries - I'm thinking Tesla packs) :/
Oct 09, 2025 03:13 PM
134 Posts
Joined Mar 2021
TenseApple583Oct 09, 2025 03:13 PM
134 Posts
Quote from wiebel03 :
Quote from jongasse :
That would be awesome. People might mistakenly suggest purchasing 4 of these in series, but that's not what we/I am asking for - I'm asking for a "native" 48v battery (so 48v,, 320Ah battery)
320Ah 48v is massive and unlikely to be found. It'd be too dense and heavy to carry. For reference this 280ah 12v battery is ~3700 wh, whereas a 320Ah 48v is ~16,900 wh which is 450% larger in size.

A 70ah 48v battery is equivalent to a 280ah 12v battery, just an fyi (52.8 x 70 = 13.2 x 280)
I'm always grateful to see someone else that understands how this works. IMO we should abolish amp hours as a battery rating and move to watt hours; it's universal across voltages and makes much more sense.

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Oct 09, 2025 09:17 PM
163 Posts
Joined Dec 2007
thepd7Oct 09, 2025 09:17 PM
163 Posts
Quote from jongasse :
You are absolutely correct and Thank You for the correction. I noticed it last night but didn't think anyone would care or notice. My excuse for this messup was that my brain was fried from reading too many Prime day deals Embarrassment

I am hoping for some 48v 70ah deals (~$300). They are pretty hard to find Frown

Also, I am jealous of people in the EU boasting about their 1000 EUR 20kWh used EV battery packs - any idea if and when we in the U.S. will get to enjoy that (except the leaf EV batteries - I'm thinking Tesla packs) :/
I saw an Ioniq 5 pack on reddit (ebay screen shot) for $2500 - that's 77 kWh if you can sort out how to connect it up!
Oct 10, 2025 04:44 AM
4 Posts
Joined Mar 2024
useless_capitalistOct 10, 2025 04:44 AM
4 Posts
How are these so cheap? Four of these are the same capacity as a Tesla Powerwall right?
Pro
Oct 10, 2025 05:01 AM
1,559 Posts
Joined Dec 2005
alphawave
Pro
Oct 10, 2025 05:01 AM
1,559 Posts
Quote from wiebel03 :
320Ah 48v is massive and unlikely to be found. It'd be too dense and heavy to carry. For reference this 280ah 12v battery is ~3700 wh, whereas a 320Ah 48v is ~16,900 wh which is 450% larger in size.

A 70ah 48v battery is equivalent to a 280ah 12v battery, just an fyi (52.8 x 70 = 13.2 x 280)
These are available from several companies, but one with a US warehouse is Docan:
https://www.docanpower.com/noon-1...-usa-stock

They double that with their upcoming new Panda:
https://www.docanpower.com/usa-st...mbled-pack
Pro
Oct 10, 2025 05:42 AM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Oct 10, 2025 05:42 AM
1,727 Posts
Quote from alphawave :
These are available from several companies, but one with a US warehouse is Docan:
https://www.docanpower.com/noon-1...-usa-stock

They double that with their upcoming new Panda:
https://www.docanpower.com/usa-st...mbled-pack
Thank You! I looked around as well and noticed there are eBike batteries that are 48+V and 25+Ah:


https://www.aliexpress.us/item/32...82484.html
https://www.aliexpress.us/item/32...66615.html


I have no idea if their Ah ratings are reliable though and the fact that they aren't LiFePO4 gives me pause
Pro
Oct 10, 2025 05:44 AM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Oct 10, 2025 05:44 AM
1,727 Posts
Quote from useless_capitalist :
How are these so cheap? Four of these are the same capacity as a Tesla Powerwall right?
Not really. These are just literally batteries. A Powerwall is a hybrid grid tie system. This is just the engine while a Powerwall is a like the whole car.
Pro
Oct 10, 2025 02:36 PM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Oct 10, 2025 02:36 PM
1,727 Posts
Quote from TenseApple583 :
IMO we should abolish amp hours as a battery rating and move to watt hours; it's universal across voltages and makes much more sense.
Yes, watt hours do take out guesswork and make warranty claims easier. My recommendation is, anytime you purchase a battery and the seller didn't put watt hours, send them a message to do so. Enough people do that and they will take notice

Quote from thepd7 :
I saw an Ioniq 5 pack on reddit (ebay screen shot) for $2500 - that's 77 kWh if you can sort out how to connect it up!
I googled around and found this: https://www.reddit.com/r/Ioniq5/c...so_little/

Is this what you meant?

This is fantastic news. I'm sure the LTL S&H on it it into the thousands plus one would need to rent power equipment to move it around but it's a great start!
Oct 10, 2025 07:12 PM
163 Posts
Joined Dec 2007
thepd7Oct 10, 2025 07:12 PM
163 Posts
Quote from jongasse :
Yes, watt hours do take out guesswork and make warranty claims easier. My recommendation is, anytime you purchase a battery and the seller didn't put watt hours, send them a message to do so. Enough people do that and they will take notice



I googled around and found this: https://www.reddit.com/r/Ioniq5/c...so_little/

Is this what you meant?

This is fantastic news. I'm sure the LTL S&H on it it into the thousands plus one would need to rent power equipment to move it around but it's a great start!
That's the one! Yeah definitely opens up the possibility to do some interesting things as more EVs come into and then leave the market due to accidents/etc.

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Oct 10, 2025 07:14 PM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Oct 10, 2025 07:14 PM
1,727 Posts
Quote from thepd7 :
That's the one! Yeah definitely opens up the possibility to do some interesting things as more EVs come into and then leave the market due to accidents/etc.
Thank You for bringing it to my attention to begin with! This needs to become a regular occurrence here in the U.S. - for some reason this is a regular occurrence in the EU but for reasons unknown to me (I'm sure people will guess "liability!", "regulations!"), we aren't drowning in EV batteries yet in the U.S.

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