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frontpageSkillful_Pickle | Staff posted Aug 04, 2025 04:36 PM
frontpageSkillful_Pickle | Staff posted Aug 04, 2025 04:36 PM

2-Pack ECO-WORTHY 14kWh 48V 280AH LiFePO4 Solar Battery Backup

+ Free Shipping

$3,870

$4,219

8% off
eBay
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eco-worthy-us via eBay has 2-Pack ECO-WORTHY 14kWh 48V 280AH LiFePO4 Solar Battery Vertical Standing Backup on sale for $4219.49 - $350 with coupon code FIFTEENFORYOU at checkout = $3869.49. Shipping is free.

Thanks to staff member Skillful_Pickle for sharing this deal.

Note: This is for a Battery System only and will require connectors and a compatible power system (such as an inverter) to function.

About this Item:
  • Battery Capacity: 280Ah
  • Battery Power: 14336Wh
  • Rated Voltage: 51.2V
  • Voltage Range: 40~58.4V
  • Maximum Charge/ Discharge Current: 200A
  • Charge Temperature Range: 0-55℃
  • Discharge Temperature Range:﹣20-55℃
  • Maximum Charge Voltage: 58.4V
  • Screw size: M8
  • Battery Size: 23.62x10.31x30.79in
  • Battery Weight: 297.6lb/135kg
  • Max. parallel units: 15
  • Connectors: RS232 / CAN / RS485

Editor's Notes

Written by qwikwit | Staff

Original Post

Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
eco-worthy-us via eBay has 2-Pack ECO-WORTHY 14kWh 48V 280AH LiFePO4 Solar Battery Vertical Standing Backup on sale for $4219.49 - $350 with coupon code FIFTEENFORYOU at checkout = $3869.49. Shipping is free.

Thanks to staff member Skillful_Pickle for sharing this deal.

Note: This is for a Battery System only and will require connectors and a compatible power system (such as an inverter) to function.

About this Item:
  • Battery Capacity: 280Ah
  • Battery Power: 14336Wh
  • Rated Voltage: 51.2V
  • Voltage Range: 40~58.4V
  • Maximum Charge/ Discharge Current: 200A
  • Charge Temperature Range: 0-55℃
  • Discharge Temperature Range:﹣20-55℃
  • Maximum Charge Voltage: 58.4V
  • Screw size: M8
  • Battery Size: 23.62x10.31x30.79in
  • Battery Weight: 297.6lb/135kg
  • Max. parallel units: 15
  • Connectors: RS232 / CAN / RS485

Editor's Notes

Written by qwikwit | Staff

Original Post

Community Voting

Deal Score
+25
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Top Comments

bmoney
600 Posts
185 Reputation
Nope. A 48v 1000ah battery does not exist. That SOB would be over a thousand pounds.
mtm_cc
1247 Posts
506 Reputation
$580 for 5kwh plus $1,000 shipping. A 30kwh unit, close to the total capacity here, is $2,280 plus $1k shipping. $3,467 is the total at checkout. Not much cheaper and you'll have basically no recourse if shit goes wrong.

I buy shit on AliExpress all the time but that's not a screaming deal that's worth some risk.
burgerbob
412 Posts
58 Reputation
It really depends on how much you're paying for grid electricity and if there's TOU billing or not. Also how much excess capacity your solar has. If you can regularly store 14KWH a day and use it, it's a lot different than only being able to store 1-3KWH.

35 Comments

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Aug 04, 2025 04:57 PM
94 Posts
Joined May 2011
Aug 04, 2025 04:57 PM
zephyrettaAug 04, 2025 04:57 PM
94 Posts
Anyone knows which BMS/ cells they use?
Aug 04, 2025 07:38 PM
148 Posts
Joined Apr 2012
Aug 04, 2025 07:38 PM
BadOceanAug 04, 2025 07:38 PM
148 Posts
Curious to get the take of someone in the know on this...

I recently looked at buying a house that had rooftop solar installed, but they didn't appear to have any kind of battery solution. I did a bit of quick research into batteries, as I was thinking they might pay for themselves pretty quickly if I charged from solar during the day and/or from the grid at night during off-peak times, but it seemed like the ROI was higher than I expected, looking at 8-12 years using back-of-napkin math. Was I missing something here? I know it's pretty variable depending on your situation, but what is the expected ROI on a battery solution like this for a typical grid-connected home with rooftop solar?
Aug 04, 2025 07:40 PM
412 Posts
Joined Dec 2007
Aug 04, 2025 07:40 PM
burgerbobAug 04, 2025 07:40 PM
412 Posts

Our community has rated this post as helpful. If you agree, why not thank burgerbob

Quote from BadOcean :
Curious to get the take of someone in the know on this...

I recently looked at buying a house that had rooftop solar installed, but they didn't appear to have any kind of battery solution. I did a bit of quick research into batteries, as I was thinking they might pay for themselves pretty quickly if I charged from solar during the day and/or from the grid at night during off-peak times, but it seemed like the ROI was higher than I expected, looking at 8-12 years using back-of-napkin math. Was I missing something here? I know it's pretty variable depending on your situation, but what is the expected ROI on a battery solution like this for a typical grid-connected home with rooftop solar?
It really depends on how much you're paying for grid electricity and if there's TOU billing or not. Also how much excess capacity your solar has. If you can regularly store 14KWH a day and use it, it's a lot different than only being able to store 1-3KWH.
1
Pro
Aug 04, 2025 08:21 PM
1,194 Posts
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Aug 04, 2025 08:21 PM
Tarkov
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Aug 04, 2025 08:21 PM
1,194 Posts

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Quote from BadOcean :
Curious to get the take of someone in the know on this...

I recently looked at buying a house that had rooftop solar installed, but they didn't appear to have any kind of battery solution. I did a bit of quick research into batteries, as I was thinking they might pay for themselves pretty quickly if I charged from solar during the day and/or from the grid at night during off-peak times, but it seemed like the ROI was higher than I expected, looking at 8-12 years using back-of-napkin math. Was I missing something here? I know it's pretty variable depending on your situation, but what is the expected ROI on a battery solution like this for a typical grid-connected home with rooftop solar?
Where I live they stop paying you when you go past net-zero, so my electric bill is always $0 with a minimum connection fee ($35 thanks to duke energy)
I've been thinking about getting a backup battery but it will literally only be useful during power outages (specifically hurricanes) so it's not really worth the investment compared to the generator we already have.
1
Aug 04, 2025 08:22 PM
1,935 Posts
Joined Aug 2015

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Aug 04, 2025 08:46 PM
89 Posts
Joined Jan 2018
Aug 04, 2025 08:46 PM
diaboxAug 04, 2025 08:46 PM
89 Posts
Quote from BadOcean :
Curious to get the take of someone in the know on this... I recently looked at buying a house that had rooftop solar installed, but they didn't appear to have any kind of battery solution. I did a bit of quick research into batteries, as I was thinking they might pay for themselves pretty quickly if I charged from solar during the day and/or from the grid at night during off-peak times, but it seemed like the ROI was higher than I expected, looking at 8-12 years using back-of-napkin math. Was I missing something here? I know it's pretty variable depending on your situation, but what is the expected ROI on a battery solution like this for a typical grid-connected home with rooftop solar?
There are other considerations as you can't just hook up batteries to an existing system without adding some other components. Assuming that the system is grid tied, it is likely using micro-inverters and those convert the DC from the panels to AC for back-feeding into the house wiring and ultimately the grid if there is power above the house needs. You would need to add an inverter that can take the input from the micro-inverters (called AC coupling) and store the excess into batteries like these instead of pushing the excess to the grid. Then if there's a grid down situation, that inverter would power the AC load of the house by inverting DC power from these batteries, but also continue using available input from the AC coupled micro-inverters and panels. An inverter like the EG4 18kpv can do that. Outlined as scenario B, AC Coupling with existed solar system, on page 10 (8 on the page) of this manual https://eg4electronics.com/wp-con...nual-1.pdf
The ROI depends on the cost of energy in the location you are. I pay .11/kwh, some pay less, many pay more. If you can generate what you use in a day, including storing your nighttime use in enough batteries to get you through the night that's a straight math problem. I personally look at the batteries as a backup power solution and not a cost savings solution. I have enough batteries to keep my house running for 24 hours, which is equivalent to about 8 of these sized batteries in this deal. The solar panels are the cost savings driver as that's where the "free" power comes from.
These batteries can qualify for the 30% tax credit that's going to end this year, but they need to be charged by solar and need to be put in service this year to qualify, so that helps with the math.
Aug 04, 2025 08:47 PM
600 Posts
Joined Jun 2010
Aug 04, 2025 08:47 PM
bmoneyAug 04, 2025 08:47 PM
600 Posts
Quote from Redflyer :
Expensive. There are new batteries on Aliexpress 1000ah for $3,600. They must be clearing out old ecoworthy batteries.
Nope. A 48v 1000ah battery does not exist. That SOB would be over a thousand pounds.

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Yesterday 12:46 AM
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Pro
Yesterday 01:04 AM
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Joined Mar 2011
Yesterday 01:04 AM
mtm_cc
Pro
Yesterday 01:04 AM
1,247 Posts
Quote from Redflyer :
Ok check this one out on Aliexpress. Are you saying the chinese are liars and will happily cheat you out of your money?


$580.00 | Super Value 30kwh 46kwh 50kwh LiFePo4 Batteries Complete kit Energy Storage 48V 51.2V 900Ah 600Ah 1000ah Power Bank BMS
https://a.aliexpress.com/_ms4G8nb

$580 for 5kwh plus $1,000 shipping. A 30kwh unit, close to the total capacity here, is $2,280 plus $1k shipping. $3,467 is the total at checkout. Not much cheaper and you'll have basically no recourse if shit goes wrong.

I buy shit on AliExpress all the time but that's not a screaming deal that's worth some risk.
Yesterday 03:42 AM
1,819 Posts
Joined Aug 2006
Yesterday 03:42 AM
eversavageYesterday 03:42 AM
1,819 Posts
Quote from zephyretta :
Anyone knows which BMS/ cells they use?

Pace bms.. it says so in the description of the listing
Yesterday 11:47 AM
273 Posts
Joined Jun 2013
Yesterday 11:47 AM
CaptainElwoodYesterday 11:47 AM
273 Posts
Quote from diabox :
There are other considerations as you can't just hook up batteries to an existing system without adding some other components. Assuming that the system is grid tied, it is likely using micro-inverters and those convert the DC from the panels to AC for back-feeding into the house wiring and ultimately the grid if there is power above the house needs. You would need to add an inverter that can take the input from the micro-inverters (called AC coupling) and store the excess into batteries like these instead of pushing the excess to the grid. Then if there's a grid down situation, that inverter would power the AC load of the house by inverting DC power from these batteries, but also continue using available input from the AC coupled micro-inverters and panels. An inverter like the EG4 18kpv can do that. Outlined as scenario B, AC Coupling with existed solar system, on page 10 (8 on the page) of this manual https://eg4electronics.com/wp-con...nual-1.pdf
The ROI depends on the cost of energy in the location you are. I pay .11/kwh, some pay less, many pay more. If you can generate what you use in a day, including storing your nighttime use in enough batteries to get you through the night that's a straight math problem. I personally look at the batteries as a backup power solution and not a cost savings solution. I have enough batteries to keep my house running for 24 hours, which is equivalent to about 8 of these sized batteries in this deal. The solar panels are the cost savings driver as that's where the "free" power comes from.
These batteries can qualify for the 30% tax credit that's going to end this year, but they need to be charged by solar and need to be put in service this year to qualify, so that helps with the math.
In a power outage situation, wouldn't the micro inverters turn off? So in the setup you describe, you would still only be charging the batteries when grid power was available? Unless you completely decoupled the solar system from the grid and used the inverters AC output to keep the micro inverters on? I'm fully off grid so this didn't come up but it seems like a real pain to add batteries to existing grid tie systems regardless.
Yesterday 12:16 PM
11,386 Posts
Joined May 2007
Yesterday 12:16 PM
superslickzYesterday 12:16 PM
11,386 Posts
Quote from diabox :
There are other considerations as you can't just hook up batteries to an existing system without adding some other components. Assuming that the system is grid tied, it is likely using micro-inverters and those convert the DC from the panels to AC for back-feeding into the house wiring and ultimately the grid if there is power above the house needs. You would need to add an inverter that can take the input from the micro-inverters (called AC coupling) and store the excess into batteries like these instead of pushing the excess to the grid. Then if there's a grid down situation, that inverter would power the AC load of the house by inverting DC power from these batteries, but also continue using available input from the AC coupled micro-inverters and panels. An inverter like the EG4 18kpv can do that. Outlined as scenario B, AC Coupling with existed solar system, on page 10 (8 on the page) of this manual https://eg4electronics.com/wp-con...nual-1.pdf
The ROI depends on the cost of energy in the location you are. I pay .11/kwh, some pay less, many pay more. If you can generate what you use in a day, including storing your nighttime use in enough batteries to get you through the night that's a straight math problem. I personally look at the batteries as a backup power solution and not a cost savings solution. I have enough batteries to keep my house running for 24 hours, which is equivalent to about 8 of these sized batteries in this deal. The solar panels are the cost savings driver as that's where the "free" power comes from.
These batteries can qualify for the 30% tax credit that's going to end this year, but they need to be charged by solar and need to be put in service this year to qualify, so that helps with the math.

Fyi the battery doesn't need to be charged by solar to qualify for the 30 percent tax credit. It just need to be 3kwh or more in total and hooked up to your house whatever that means. It does end this year.
2
Yesterday 01:20 PM
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Yesterday 01:20 PM
josimYesterday 01:20 PM
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Yesterday 02:36 PM
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Yesterday 02:36 PM
GiantcrazyYesterday 02:36 PM
3,234 Posts
Quote from burgerbob :
It really depends on how much you're paying for grid electricity and if there's TOU billing or not. Also how much excess capacity your solar has. If you can regularly store 14KWH a day and use it, it's a lot different than only being able to store 1-3KWH.
Great answer, one bit to add - also depends on whether your utility supports net metering. If they do, and it's anywhere close to 1:1, the value proposition goes out the window pretty quickly. At that point, you're better off banking the credits and using them at night. The battery then becomes a question of failover power rather than cost savings.

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Yesterday 03:24 PM
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Joined May 2018
Yesterday 03:24 PM
Oil_BurnerYesterday 03:24 PM
1,037 Posts
Had a question to brilliant minds... if I use 1200-1400kW per month and assuming I use 40-50k per day, would this battery allow me to survive for at least 4 hrs? Given the consideration to conversion losses from DC to AC.

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