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expiredorganickiller posted Jan 19, 2025 03:49 PM

Eco-Worthy 12V 100AH LiFePO4 Lithium Battery for RV Solar Panel

$128

$190

32% off
+ Free Shipping  at eBay
78 Comments
34.1K Views
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Deal Details
Eco-Worthy-US via eBay has Eco-Worthy 12V 100AH LiFePO4 Lithium Battery for RV Solar Panel on sale for $149.99 - 15% when you apply coupon code FRESHSTART at checkout = $127.49. Shipping is free.

Thanks to community member organickiller for sharing this deal.

Features:
  • 4000+ cycle times, each lithium battery can run for more than 10 years (equivalent to 3 lead-acid batteries)
  • Reach 80% of power after one-hour charge
  • Up to 4 identical batteries can be mounted as a series
  • 22.93-lbs

Editor's Notes

Written by StrawMan86 | Staff
  • This price is slightly less than our Frontpage Deal from December.
  • eBay Seller Info:
    • eco-worthy-us (13,800+ feedback rating)
    • 98.9% Positive feedback

Original Post

Written by organickiller
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Eco-Worthy-US via eBay has Eco-Worthy 12V 100AH LiFePO4 Lithium Battery for RV Solar Panel on sale for $149.99 - 15% when you apply coupon code FRESHSTART at checkout = $127.49. Shipping is free.

Thanks to community member organickiller for sharing this deal.

Features:
  • 4000+ cycle times, each lithium battery can run for more than 10 years (equivalent to 3 lead-acid batteries)
  • Reach 80% of power after one-hour charge
  • Up to 4 identical batteries can be mounted as a series
  • 22.93-lbs

Editor's Notes

Written by StrawMan86 | Staff
  • This price is slightly less than our Frontpage Deal from December.
  • eBay Seller Info:
    • eco-worthy-us (13,800+ feedback rating)
    • 98.9% Positive feedback

Original Post

Written by organickiller

Community Voting

Deal Score
+24
Good Deal
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Top Comments

Caleo
6618 Posts
1198 Reputation
Yep... people don't seem to realise those additional components needed add up fast.

A lot of people here seem to think that all-in-one units (like Bluetti, Ecoflow, Pecron, etc.) should be just barely over the bare-minimum price of the battery size they have inside them. Nevermind all those extra components like the solar charge controller(s), AC charger w/ UPS switchover, USB, DC out, etc.
Caleo
6618 Posts
1198 Reputation
Economies of scale. 100Ah is a much more common size battery, and they make many more of them. ..nevermind the fact that simply swapping 2 LFPs into a UPS isn't necessarily a great idea since the charge controllers aren't designed for LFPs..


These aren't suitable for use as a car battery, fwiw. Not great with high temps, can't be charged below freezing, and can't necessarily supply the large spike in amps a starter draws.
FloridaKevin
651 Posts
181 Reputation
No need to wonder. Go to YouTube, plenty of reputable people doing capacity checks and teardown videos. These batteries are coming down in price because the technology is becoming more popular. I am also going to go out on a limb here and say they produce way more 100ah batteries than they do 10ah batteries.

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78 Comments

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Pro
Jan 19, 2025 04:35 PM
14,241 Posts
Joined Aug 2004
avalon
Pro
Jan 19, 2025 04:35 PM
14,241 Posts
It's so weird to me that the massive 100ah batteries from them are getting so cheap

Meanwhile the UPS RBC2 sized 2-pack is still so expensive, almost half the price

https://www.ebay.com/itm/126557369610

should be one third if not one fourth the price

makes you wonder about the real 100ah capacity
Jan 19, 2025 04:36 PM
633 Posts
Joined Nov 2012

This comment has been rated as unhelpful by Slickdeals users.

Jan 19, 2025 05:08 PM
155 Posts
Joined Apr 2006
sli2020Jan 19, 2025 05:08 PM
155 Posts
Wish the one with bluetooth is on sale too.
5
Jan 19, 2025 05:32 PM
1 Posts
Joined Jun 2020

This comment has been rated as unhelpful by Slickdeals users.

Jan 19, 2025 05:36 PM
651 Posts
Joined Dec 2014
FloridaKevinJan 19, 2025 05:36 PM
651 Posts
Quote from avalon :
It's so weird to me that the massive 100ah batteries from them are getting so cheap

Meanwhile the UPS RBC2 sized 2-pack is still so expensive, almost half the price

https://www.ebay.com/itm/126557369610

should be one third if not one fourth the price

makes you wonder about the real 100ah capacity
No need to wonder. Go to YouTube, plenty of reputable people doing capacity checks and teardown videos. These batteries are coming down in price because the technology is becoming more popular. I am also going to go out on a limb here and say they produce way more 100ah batteries than they do 10ah batteries.
Jan 19, 2025 05:38 PM
6,618 Posts
Joined Dec 2004
CaleoJan 19, 2025 05:38 PM
6,618 Posts
Quote from avalon :
It's so weird to me that the massive 100ah batteries from them are getting so cheap

Meanwhile the UPS RBC2 sized 2-pack is still so expensive, almost half the price

https://www.ebay.com/itm/126557369610

should be one third if not one fourth the price

makes you wonder about the real 100ah capacity
Economies of scale. 100Ah is a much more common size battery, and they make many more of them. ..nevermind the fact that simply swapping 2 LFPs into a UPS isn't necessarily a great idea since the charge controllers aren't designed for LFPs..

Quote from NotNotSmart :
anyone know if the posts can be swapped or upgraded to car terminals?
These aren't suitable for use as a car battery, fwiw. Not great with high temps, can't be charged below freezing, and can't necessarily supply the large spike in amps a starter draws.
Last edited by Caleo January 19, 2025 at 09:41 AM.
Jan 19, 2025 05:43 PM
1,812 Posts
Joined Aug 2006

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Jan 19, 2025 05:43 PM
132 Posts
Joined Jan 2012
hpcaubJan 19, 2025 05:43 PM
132 Posts
Great price!
Jan 19, 2025 05:50 PM
744 Posts
Joined May 2009
covertfantomJan 19, 2025 05:50 PM
744 Posts
Quote from avalon :
It's so weird to me that the massive 100ah batteries from them are getting so cheap Meanwhile the UPS RBC2 sized 2-pack is still so expensive, almost half the price https://www.ebay.com/itm/126557369610 should be one third if not one fourth the price makes you wonder about the real 100ah capacity
I agree. I see some talk that having a dedicated UPS will allow you to gracefully shut everything down. With these 100ah batteries so cheap, you can just run them for an entire day and not shutdown at all.
Jan 19, 2025 05:52 PM
485 Posts
Joined Nov 2012
agentsteveJan 19, 2025 05:52 PM
485 Posts
Quote from covertfantom :
I agree. I see some talk that having a dedicated UPS will allow you to gracefully shut everything down. With these 100ah batteries so cheap, you can just run them for an entire day and not shutdown at all.
The only problem is that getting an inverter with a <10ms transfer time to pair with the batteries is still astronomically expensive.
Jan 19, 2025 06:03 PM
1,096 Posts
Joined Dec 2019
golfreakJan 19, 2025 06:03 PM
1,096 Posts
This is a great price.
Upgraded version with low temperature protection.
Jan 19, 2025 06:10 PM
6,618 Posts
Joined Dec 2004
CaleoJan 19, 2025 06:10 PM
6,618 Posts

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

Quote from agentsteve :
The only problem is that getting an inverter with a <10ms transfer time to pair with the batteries is still astronomically expensive.
Yep... people don't seem to realise those additional components needed add up fast.

A lot of people here seem to think that all-in-one units (like Bluetti, Ecoflow, Pecron, etc.) should be just barely over the bare-minimum price of the battery size they have inside them. Nevermind all those extra components like the solar charge controller(s), AC charger w/ UPS switchover, USB, DC out, etc.
4
Jan 19, 2025 06:11 PM
162 Posts
Joined Jul 2016
Rickety_CricketJan 19, 2025 06:11 PM
162 Posts
Quote from NotNotSmart :
anyone know if the posts can be swapped or upgraded to car terminals?
The operating temperatures of this battery are 32F - 130F.
1
1
Jan 19, 2025 06:15 PM
485 Posts
Joined Nov 2012
agentsteveJan 19, 2025 06:15 PM
485 Posts
Quote from Caleo :
Yep... people don't seem to realise those additional components needed add up fast.

A lot of people here seem to think that all-in-one units (like Bluetti, Ecoflow, Pecron, etc.) should be just barely over the bare-minimum price of the battery size they have inside them. Nevermind all those extra components like the solar charge controller(s), AC charger w/ UPS switchover, USB, DC out, etc.
I just bought a 1kwh EcoFlow power bank with a <10ms transfer time for $550. I actually thought of building my own with batteries like this first, but gave up after pricing out high performance inverters.

DIY is a good idea for large scale projects like a whole house backup system or maybe a van/RV but there's no economical way to make your own UPS yet.

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Jan 19, 2025 06:27 PM
6,618 Posts
Joined Dec 2004
CaleoJan 19, 2025 06:27 PM
6,618 Posts
Quote from agentsteve :
I just bought a 1kwh EcoFlow power bank with a <10ms transfer time for $550. I actually thought of building my own with batteries like this first, but gave up after pricing out high performance inverters.

DIY is a good idea for large scale projects like a whole house backup system or maybe a van/RV but there's no economical way to make your own UPS yet.
The nice thing about most all-in-one units is that once you have one, you can buy inexpensive batteries like this and wire them into the solar input to expand their capacity. That's usually much cheaper vs buying their proprietary expansion batteries (albeit less tidy/convenient - you'd also have to find a way to charge the extra batteries, like using ecoflow's alternator charger for reverse charging).

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