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frontpageSkillful_Pickle | Staff posted Sep 08, 2025 05:53 PM
frontpageSkillful_Pickle | Staff posted Sep 08, 2025 05:53 PM

2-Pack ECO-WORTHY 14kWh 51.2V 280AH LiFePO4 Battery Backup + Busbar

+ Free Shipping

$3,850

$4,200

8% off
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eco-worthy-us via eBay has 2-Pack ECO-WORTHY 14kWh 51.2V 280AH LiFePO4 Solar Battery Backup w/ 200A BMS + Busbar (Version2) on sale for $4199.99 - $350 with coupon code FRESHPICKS at checkout = $3849.99. Shipping is free.

Note: Also includes bonus 400A Busbar with 6×M8 Studs.

Thanks to staff member Skillful_Pickle for sharing this deal.

About this Item:
  • Battery Capacity: 280Ah each
  • Battery Power: 14336Wh each
  • 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: 20.5x9.9x29.3in
  • Battery Weight: 297.6lb/135kg each
  • Max. parallel units: 15
  • Connectors: RS232 / CAN / RS485
  • Manufacturer Page for more details.

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 51.2V 280AH LiFePO4 Solar Battery Backup w/ 200A BMS + Busbar (Version2) on sale for $4199.99 - $350 with coupon code FRESHPICKS at checkout = $3849.99. Shipping is free.

Note: Also includes bonus 400A Busbar with 6×M8 Studs.

Thanks to staff member Skillful_Pickle for sharing this deal.

About this Item:
  • Battery Capacity: 280Ah each
  • Battery Power: 14336Wh each
  • 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: 20.5x9.9x29.3in
  • Battery Weight: 297.6lb/135kg each
  • Max. parallel units: 15
  • Connectors: RS232 / CAN / RS485
  • Manufacturer Page for more details.

Editor's Notes

Written by qwikwit | Staff

Original Post

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Top Comments

vnangia
538 Posts
302 Reputation
A lot of it depends on what exactly your electrical set up is. Hard to tell you without that—if you have a critical loads panel (probably not) then it's relatively easy. If not, then one option could look like this:

Install a whole home transfer switch or a generator interlock.
Plug in the battery/inverter (this plus a large inverter, or the Delta Pro or similar) into the generator/backup input port.
Install a special breaker to charge the battery/inverter that you will turn off when on battery power.
Manually switch to the generator during outages and switch back when grid power is back. Turn on the battery charging breaker when power is back.


I use this $150 transfer switch [vevor.com] to bypass the inverter and feed the panel directly from the grid when I need to do inverter/battery maintenance, for example, and it's ... fine, does the job, no issue. 4/0-4/0-4/0-2/0 SER wiring cost me about $8/foot, and I bought 10ft. The battery breaker, even like a 50amp ($20?), plus associated socket ($35 for a wall-mount socket) and AWG6 wiring, maybe $2/foot and assume maybe 25 ft?

The battery and inverter is where it'll get spendy. But this would almost certainly meet code as long as the individual components are UL listed and you're absolutely sure to turn off the battery charging breaker before switching to the battery feed.

71 Comments

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Sep 13, 2025 07:03 PM
707 Posts
Joined Jan 2007
EsenteSep 13, 2025 07:03 PM
707 Posts
With 28kWh, is there a way to let this system power the house, and charged from the grid when needed or at night?
Sep 13, 2025 08:42 PM
1,903 Posts
Joined Apr 2007
topchoSep 13, 2025 08:42 PM
1,903 Posts
You need an inverter. A hybrid inverter. And a good amount of wiring.
Sep 13, 2025 09:08 PM
707 Posts
Joined Jan 2007
EsenteSep 13, 2025 09:08 PM
707 Posts
Quote from topcho :
You need an inverter. A hybrid inverter. And a good amount of wiring.
Thanks! Do you have any recommendations for one good hybrid inverter?
Sep 13, 2025 09:26 PM
1,903 Posts
Joined Apr 2007
topchoSep 13, 2025 09:26 PM
1,903 Posts
Quote from Esente :
Thanks! Do you have any recommendations for one good hybrid inverter?
Oh, boy. You may be opening a can of worms. Victron are state of the art. Dutch brand. Nor cheap. Solark is revered, so expensive. Affordable and reasonable quality Chinese brands are widely used such as growatt, eg4. Huawei is big but not really sold in the USA.
Your biggest challenge will be not so much the cost of the inverter but planning and rewiring if you want a seamless system. I think anker had a semi complete system with batteries, transfer switch, etc. Fyi
2
Sep 14, 2025 03:40 AM
592 Posts
Joined Sep 2018
ProtegeSep 14, 2025 03:40 AM
592 Posts
Quote from Esente :
With 28kWh, is there a way to let this system power the house, and charged from the grid when needed or at night?
if you are charging it off the grid then its not worth it.
Pro
Sep 14, 2025 04:03 AM
1,727 Posts
Joined Feb 2011
jongasse
Pro
Sep 14, 2025 04:03 AM
1,727 Posts
Quote from Protege :
if you are charging it off the grid then its not worth it.
This is definitely wrong in most of California where they will begin charging a fixed monthly fee irregardless of how much power you use.

As a result, peak shaving using a battery using no solar turns out to be smarter, cheaper and can be done even by people in apartments than using solar
Sep 14, 2025 04:48 AM
707 Posts
Joined Jan 2007
EsenteSep 14, 2025 04:48 AM
707 Posts
Quote from Protege :
if you are charging it off the grid then its not worth it.
At least here in Texas, there are providers with free or low rate electricity at night, which I think is great for charging these batteries. Or if the inverter is good, I can also charge by solar. my goal is to be less dependent of the grid when I can.

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Sep 15, 2025 03:41 AM
1,653 Posts
Joined Oct 2006
bjammSep 15, 2025 03:41 AM
1,653 Posts
Quote from Esente :
At least here in Texas, there are providers with free or low rate electricity at night, which I think is great for charging these batteries. Or if the inverter is good, I can also charge by solar. my goal is to be less dependent of the grid when I can.
Yup they have plans here in Texas where anything between 9pm and 9am is free. So you can run off batteries all day then just recharge it at night when its free. No need for solar if it covers your needs but it would help reduce usage during the day but probably not cost effective.
Sep 15, 2025 04:19 PM
4,255 Posts
Joined Jul 2005
geekwithoutacauseSep 15, 2025 04:19 PM
4,255 Posts
Quote from jongasse :
This is definitely wrong in most of California where they will begin charging a fixed monthly fee irregardless of how much power you use.

As a result, peak shaving using a battery using no solar turns out to be smarter, cheaper and can be done even by people in apartments than using solar
that contradicts itself. Having higher fixed cost will make storing power in batteries charged from the grid LESS effective. Themost effective way is with LOW fixed cost, low off peak charges and high on peak charges.
Sep 15, 2025 04:20 PM
4,255 Posts
Joined Jul 2005
geekwithoutacauseSep 15, 2025 04:20 PM
4,255 Posts
Quote from bjamm :
Yup they have plans here in Texas where anything between 9pm and 9am is free. So you can run off batteries all day then just recharge it at night when its free. No need for solar if it covers your needs but it would help reduce usage during the day but probably not cost effective.
wow. imagine, driving your ev for free..... Where is this ?
Sep 15, 2025 04:31 PM
3 Posts
Joined Apr 2016
bzsunSep 15, 2025 04:31 PM
3 Posts
Quote from vnangia :
Quote from icer :
I don't mind manual intervention, but the solar guy I talked to said it would take 10k of wiring to make it come to code. That said, he's the guy that wants to sell the 16k system.
I was trying to figure out if there was a way to use an approx $4k battery and, even if I have to throw a switch, have solar keep working (in a code - compliant manner) during a power outage.
A lot of it depends on what exactly your electrical set up is. Hard to tell you without that—if you have a critical loads panel (probably not) then it's relatively easy. If not, then one option could look like this:
  1. Install a whole home transfer switch or a generator interlock.
  2. Plug in the battery/inverter (this plus a large inverter, or the Delta Pro or similar) into the generator/backup input port.
  3. Install a special breaker to charge the battery/inverter that you will turn off when on battery power.
  4. Manually switch to the generator during outages and switch back when grid power is back. Turn on the battery charging breaker when power is back.
I use this $150 transfer switch [vevor.com] to bypass the inverter and feed the panel directly from the grid when I need to do inverter/battery maintenance, for example, and it's ... fine, does the job, no issue. 4/0-4/0-4/0-2/0 SER wiring cost me about $8/foot, and I bought 10ft. The battery breaker, even like a 50amp ($20?), plus associated socket ($35 for a wall-mount socket) and AWG6 wiring, maybe $2/foot and assume maybe 25 ft?

The battery and inverter is where it'll get spendy. But this would almost certainly meet code as long as the individual components are UL listed and you're absolutely sure to turn off the battery charging breaker before switching to the battery feed.
Thank you for the suggestion. I have a main disconnect (200A) located outside and a main panel (200A) in the garage. The manual transfer switch is exactly what I want to do for bypassing the inverter. According to your suggestion, I would like to connect the main disconnect to the grid terminal of the inverter and from the load terminal of the inverter to one input leg of transfer switch-->main panel. And also connect the main disconnect to the second input leg to transfer switch--> main panel. How do you split the output from the main disconnect to two outputs (grid terminal of the inverter and the second leg of the transfer switch?
Sep 15, 2025 04:33 PM
3 Posts
Joined Apr 2016
bzsunSep 15, 2025 04:33 PM
3 Posts
Quote from bjamm :
Quote from Esente :
At least here in Texas, there are providers with free or low rate electricity at night, which I think is great for charging these batteries. Or if the inverter is good, I can also charge by solar. my goal is to be less dependent of the grid when I can.
Yup they have plans here in Texas where anything between 9pm and 9am is free. So you can run off batteries all day then just recharge it at night when its free. No need for solar if it covers your needs but it would help reduce usage during the day but probably not cost effective.
Yes. I am using the free night electricity plan for over 2 years and am thinking of adding batteries and inverters in Houston. I may need an electrician to connect the wires for me.
Sep 15, 2025 04:35 PM
3 Posts
Joined Apr 2016
bzsunSep 15, 2025 04:35 PM
3 Posts
Quote from topcho :
Quote from Esente :
Thanks! Do you have any recommendations for one good hybrid inverter?
Oh, boy. You may be opening a can of worms. Victron are state of the art. Dutch brand. Nor cheap. Solark is revered, so expensive. Affordable and reasonable quality Chinese brands are widely used such as growatt, eg4. Huawei is big but not really sold in the USA.
Your biggest challenge will be not so much the cost of the inverter but planning and rewiring if you want a seamless system. I think anker had a semi complete system with batteries, transfer switch, etc. Fyi
SRNE seems to be cost-effective and reliable, according to the reviews from disysolarforum.
Sep 15, 2025 04:43 PM
1,653 Posts
Joined Oct 2006
bjammSep 15, 2025 04:43 PM
1,653 Posts
Quote from geekwithoutacause :
wow. imagine, driving your ev for free..... Where is this ?
this is what I do. I have an EV that I only charge during free hours at night. I drive 600 plus miles a week and seems to work out nicely so far.

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Sep 15, 2025 04:49 PM
4,255 Posts
Joined Jul 2005
geekwithoutacauseSep 15, 2025 04:49 PM
4,255 Posts
Quote from bjamm :
this is what I do. I have an EV that I only charge during free hours at night. I drive 600 plus miles a week and seems to work out nicely so far.
Man that's awesome.

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