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forum threadSkillful_Pickle | Staff posted Aug 21, 2025 05:45 PM
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forum threadSkillful_Pickle | Staff posted Aug 21, 2025 05:45 PM

2-Pack ECO-WORTHY 12V 280Ah LiFePO4 Low Temp Lithium Battery w/ Bluetooth $680 + Free Shipping

$680

$1,000

32% off
Amazon
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ECO-WORTHY US via Amazon [amazon.com] has 2-Pack ECO-WORTHY 12V 280Ah LiFePO4 Low Temp Protection Lithium Battery w/ Bluetooth for $999.99 - 32% w/ code HAB3YSLVat checkout =$679.99. Shipping is free.


Note, must apply the listed promo code for discount to apply at final checkout. Product will be sold/shipped by ECO-WORTHY US.


About this Product:
  • 12V Lithium Battery/200A BMS
  • 280Ah Smart LiFePO4 Lithium Battery
  • 3584Wh Energy (12.8V x 280Ah)
  • Low Temperature Protection
  • Lithium Phosphate Battery Composition
  • Monitor In Real Time/Connect Bluetooth 5.0
  • Rated 4.4 stars overall based on 173 reviews.
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Deal Details
Product Info
Community Notes
About the Poster
ECO-WORTHY US via Amazon [amazon.com] has 2-Pack ECO-WORTHY 12V 280Ah LiFePO4 Low Temp Protection Lithium Battery w/ Bluetooth for $999.99 - 32% w/ code HAB3YSLVat checkout =$679.99. Shipping is free.


Note, must apply the listed promo code for discount to apply at final checkout. Product will be sold/shipped by ECO-WORTHY US.


About this Product:
  • 12V Lithium Battery/200A BMS
  • 280Ah Smart LiFePO4 Lithium Battery
  • 3584Wh Energy (12.8V x 280Ah)
  • Low Temperature Protection
  • Lithium Phosphate Battery Composition
  • Monitor In Real Time/Connect Bluetooth 5.0
  • Rated 4.4 stars overall based on 173 reviews.

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Aug 21, 2025 06:12 PM
846 Posts
Joined Jul 2013
imabuvuAug 21, 2025 06:12 PM
846 Posts
do you need a special solar charger or will the renogy ones work that charge acid batteries. Will my old inverters work?
1
Aug 21, 2025 06:29 PM
14 Posts
Joined Oct 2015
zorro6969Aug 21, 2025 06:29 PM
14 Posts
Quote from imabuvu :
do you need a special solar charger or will the renogy ones work that charge acid batteries. Will my old inverters work?
You will need a charger, inverter and charge controller that can work with lithium batteries - some older equipment will not be compatible So you need to check what you have and see if it is compatible with Lithium/LiFePO4 batteries
1
1
Aug 21, 2025 11:46 PM
282 Posts
Joined Jul 2015
vincent.zues1Aug 21, 2025 11:46 PM
282 Posts
Where did this 999 price come from. Not much of a sale. Decent but not using normal price for this 32% "discount "
Aug 22, 2025 05:04 AM
1,843 Posts
Joined Nov 2010
testshootAug 22, 2025 05:04 AM
1,843 Posts
was scammed by these guys on solar mounts. ignored contact form, emails, and calls. will be reporting to BBB
1
3
Aug 22, 2025 02:41 PM
20 Posts
Joined Jan 2008
ZekeThePlumberAug 22, 2025 02:41 PM
20 Posts
Quote from imabuvu :
do you need a special solar charger or will the renogy ones work that charge acid batteries. Will my old inverters work?

Depends on how old but many charge controllers have the ability to select your battery chemistry. So double check that but I would say it's likely it would work.
1
Aug 23, 2025 02:07 AM
550 Posts
Joined Sep 2018
ProtegeAug 23, 2025 02:07 AM
550 Posts
1st of 4 I tested wouldn't charge to more than 59% according to the app which turned out to be accurate after my discharge test. I'm retrying the test. charging that one up right now. 2nd of 4 charged to a Max of 278.8ah according to the app. I'm preforming a discharge test right now on it. Hopefully it actually outputs the stated 280 ah advertised. Will update once I finish testing all 4.
Pro
Aug 24, 2025 12:10 AM
617 Posts
Joined Jan 2016
wildbird12
Pro
Aug 24, 2025 12:10 AM
617 Posts
Quote from Protege :
1st of 4 I tested wouldn't charge to more than 59% according to the app which turned out to be accurate after my discharge test. I'm retrying the test. charging that one up right now. 2nd of 4 charged to a Max of 278.8ah according to the app. I'm preforming a discharge test right now on it. Hopefully it actually outputs the stated 280 ah advertised. Will update once I finish testing all 4.
You may have to charge/discharge a few times or perform top level charging to get the full capacity. Check on diy solar forum

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Aug 24, 2025 10:11 PM
550 Posts
Joined Sep 2018
ProtegeAug 24, 2025 10:11 PM
550 Posts
Quote from wildbird12 :
You may have to charge/discharge a few times or perform top level charging to get the full capacity. Check on diy solar forum
I got within 100wh of spec on the 2nd one/ out of 4 I tested. It still had 6ah left but that was good engough for my test.

1st is starting to look promising, it's charged above where it was last time. By the end of day I will find out if according to the app its accepted a full charge and my wattsup meter.

I'm using my 100/30 victron to charge it up so its slow going.
Pro
Aug 26, 2025 12:35 AM
617 Posts
Joined Jan 2016
wildbird12
Pro
Aug 26, 2025 12:35 AM
617 Posts
Quote from Protege :
I got within 100wh of spec on the 2nd one/ out of 4 I tested. It still had 6ah left but that was good engough for my test.

1st is starting to look promising, it's charged above where it was last time. By the end of day I will find out if according to the app its accepted a full charge and my wattsup meter.

I'm using my 100/30 victron to charge it up so its slow going.
With the app, you should be able to see the individual cell-level voltages. You can see if they all go to about 3.6 or if you have a "runner" that goes much higher than the others and turns off the BMS before the others are charged. In that case, you should apply a small amperage (0.2 or less) at 14.4-14.6V and let it sit there until they all arrive at 3.6.
Aug 26, 2025 05:13 AM
83 Posts
Joined Apr 2015
hourAug 26, 2025 05:13 AM
83 Posts
Quote from wildbird12 :
With the app, you should be able to see the individual cell-level voltages. You can see if they all go to about 3.6 or if you have a "runner" that goes much higher than the others and turns off the BMS before the others are charged. In that case, you should apply a small amperage (0.2 or less) at 14.4-14.6V and let it sit there until they all arrive at 3.6.
Yeah was gonna say this too. Sounds like a major cell imbalance that could hopefully be remedied by slow charging and holding in absorption for a while for balancing to occur. A long while. I would have sent it back though, a grossly mismatched cell shouldn't have made it in to the pack.
Aug 26, 2025 02:11 PM
550 Posts
Joined Sep 2018
ProtegeAug 26, 2025 02:11 PM
550 Posts
Quote from wildbird12 :
With the app, you should be able to see the individual cell-level voltages. You can see if they all go to about 3.6 or if you have a "runner" that goes much higher than the others and turns off the BMS before the others are charged. In that case, you should apply a small amperage (0.2 or less) at 14.4-14.6V and let it sit there until they all arrive at 3.6.
I fully charged up one of them and I got to 3.4V on each cell after letting it sit overnight. Yes it was 14.2V when it was in float mode with cell voltages at 3.49,3.68,3.54,3.50. Its strange that the app never goes up to 280ah however it maxes out at 278.52 ah.

I don't have enough time to charge and discharge each of the 4 individually with my 100/30 Victron so I'll do another discharge test on this 1 and then charge all 4 to full, parallel them for a couple days, and then series them 4s onto 1 of 2 of my lv6548. There I can fully charge eaisly using 50-80a of solar.
Aug 26, 2025 02:13 PM
550 Posts
Joined Sep 2018
ProtegeAug 26, 2025 02:13 PM
550 Posts
Quote from hour :
Yeah was gonna say this too. Sounds like a major cell imbalance that could hopefully be remedied by slow charging and holding in absorption for a while for balancing to occur. A long while. I would have sent it back though, a grossly mismatched cell shouldn't have made it in to the pack.
you know of a good cheap 4s balancer I could use for my 4 DC house 165ah 12v. One of them is reading higher than 14v and one of them only gets to 78% fully charged because of it with the other 2 in the low 90's high 80%s.
Pro
Aug 26, 2025 07:48 PM
617 Posts
Joined Jan 2016
wildbird12
Pro
Aug 26, 2025 07:48 PM
617 Posts
Quote from Protege :
I fully charged up one of them and I got to 3.4V on each cell after letting it sit overnight. Yes it was 14.2V when it was in float mode with cell voltages at 3.49,3.68,3.54,3.50. Its strange that the app never goes up to 280ah however it maxes out at 278.52 ah.

I don't have enough time to charge and discharge each of the 4 individually with my 100/30 Victron so I'll do another discharge test on this 1 and then charge all 4 to full, parallel them for a couple days, and then series them 4s onto 1 of 2 of my lv6548. There I can fully charge eaisly using 50-80a of solar.
The difference between the cells is 0.19. That is too high. It should be less than 0.1, ideally less than 0.05. That cell that is 3.68 is a "runner" and makes the BMS turn off before the others can charge fully (i.e., from 3.60V to 3.65). Therefore you are not seeing the full capacity. I would charge this battery with a power supply that can be set to deliver 14.4V and 0.1 amps or a similar low level, so that the BMS does not activate, and let it sit over night or longer, until the other cells approach 3.6+
Aug 27, 2025 03:01 PM
6 Posts
Joined Nov 2009
rhmasterAug 27, 2025 03:01 PM
6 Posts
Anyone know how long this will run a rv ac unit draws 15 amp running

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Aug 28, 2025 01:16 PM
550 Posts
Joined Sep 2018
ProtegeAug 28, 2025 01:16 PM
550 Posts
Quote from wildbird12 :
The difference between the cells is 0.19. That is too high. It should be less than 0.1, ideally less than 0.05. That cell that is 3.68 is a "runner" and makes the BMS turn off before the others can charge fully (i.e., from 3.60V to 3.65). Therefore you are not seeing the full capacity. I would charge this battery with a power supply that can be set to deliver 14.4V and 0.1 amps or a similar low level, so that the BMS does not activate, and let it sit over night or longer, until the other cells approach 3.6+
I don't have a lithium charger. I only have the Victron 100/30. I could use my car battery maintainer. I think that outputs 0.5amps or less I think.

Should I do this before I put all of them parallel? Will it drive the cells out of balance once I 4s series them together?

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