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expired Posted by Skillful_Pickle | Staff • Jun 6, 2025
expired Posted by Skillful_Pickle | Staff • Jun 6, 2025

4-Pack ECO-WORTHY 48V 100Ah LiFePO4 Batteries + 5KW Hybrid Inverter

+ Free Shipping

$3,200

$4,200

23% off
eBay
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Update: this offer is still available

eco-worthy-us via eBay has 4-Pack ECO-WORTHY 48V 100Ah LiFePO4 Batteries + 5KW 48V Solar Hybrid Inverter on sale for $4,199.99 - $1,000 with coupon code ECOWORTHYSUMMER at checkout = $3,199.99. Shipping is free.

Thanks to Staff Member Skillful_Pickle for sharing this deal.

Editor's Notes

Written by slickdewmaster | Staff
  • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
  • Offer valid for a limited time only /while supplies last.
  • At the time of this posting, our research indicates that this is $1,790 lower than the next best comparable prices starting from $4,989.99.

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Update: this offer is still available

eco-worthy-us via eBay has 4-Pack ECO-WORTHY 48V 100Ah LiFePO4 Batteries + 5KW 48V Solar Hybrid Inverter on sale for $4,199.99 - $1,000 with coupon code ECOWORTHYSUMMER at checkout = $3,199.99. Shipping is free.

Thanks to Staff Member Skillful_Pickle for sharing this deal.

Editor's Notes

Written by slickdewmaster | Staff
  • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
  • Offer valid for a limited time only /while supplies last.
  • At the time of this posting, our research indicates that this is $1,790 lower than the next best comparable prices starting from $4,989.99.

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My Math on this:

I am in So Cal in a town where the city takes there own cut and thus electricity prices are ridiculous (Real rate calculated by taking bill and dividing by KHw is nearly $0.5 / kWh. I bought panels at 24 panels at $120 / 380 Watts call it $3K for nominal 9120 Watts but my real production is about 7800 peak 85% not bad. I bought an EG4 18KV off a guy who had planned to go off grid and an EG4 battery ~15Kwh battery to go with it for call it $8K. Another $2k in installation costs (12 panels on the flat patio cover needed angle brackets and welded up a angled patio cover on the side of the house for the other 12, some wire, flex, connectors, breaker to tie it to the panel. All in about $13K. Tax incentives cover ~1/3 so real cost is $9K. New california law only pays me $0.038 per KWh and charges me $.50 no wonder all the solar companies are going out of business. No way am I going to put power back into the grid at those prices.
My bill dropped from $400 to $150 / month. (My previous solar install under the old rules did drop to zero with no battery install required since the utility was paying me at the same rate they were charging. I get that there are infrastructure costs, but there is no way that infrastructure costs are 93% of costs. (In fact they publish that generation costs are 60%, pay us 60% and everyone would be happy)
Saving $250 month gives a payoff time of 3 years. This makes sense to me with the crazy rates in this city. It also insulates somewhat from future rate hikes. If your rates are in line with US average (about $.25) the payoff would double to 6 years.
This inverter looks a lot like the SunGold unit that Will Prowse recently used to make a dolly cart setup on YouTube. The output matches, the screen is in the same place, and both have a breaker switch on the left side. $3,200 for these 4 batteries ($800 each) is a good deal, so adding in the rack, wiring, and inverter looks pretty slick to me.
Half a tank of propane that gets refilled daily

53 Comments

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Jun 7, 2025
7 Posts
Joined May 2015
Jun 7, 2025
RonnieW1968
Jun 7, 2025
7 Posts
Need a $100 code i have 8 of these batterys and 4 inverts
Jun 7, 2025
76 Posts
Joined Nov 2013
Jun 7, 2025
ThomasT9833
Jun 7, 2025
76 Posts
Quote from profmason :
My Math on this:I am in So Cal in a town where the city takes there own cut and thus electricity prices are ridiculous (Real rate calculated by taking bill and dividing by KHw is nearly $0.5 / kWh. I bought panels at 24 panels at $120 / 380 Watts call it $3K for nominal 9120 Watts but my real production is about 7800 peak 85% not bad. I bought an EG4 18KV off a guy who had planned to go off grid and an EG4 battery ~15Kwh battery to go with it for call it $8K. Another $2k in installation costs (12 panels on the flat patio cover needed angle brackets and welded up a angled patio cover on the side of the house for the other 12, some wire, flex, connectors, breaker to tie it to the panel. All in about $13K. Tax incentives cover ~1/3 so real cost is $9K. New california law only pays me $0.038 per KWh and charges me $.50 no wonder all the solar companies are going out of business. No way am I going to put power back into the grid at those prices. My bill dropped from $400 to $150 / month. (My previous solar install under the old rules did drop to zero with no battery install required since the utility was paying me at the same rate they were charging. I get that there are infrastructure costs, but there is no way that infrastructure costs are 93% of costs. (In fact they publish that generation costs are 60%, pay us 60% and everyone would be happy) Saving $250 month gives a payoff time of 3 years. This makes sense to me with the crazy rates in this city. It also insulates somewhat from future rate hikes. If your rates are in line with US average (about $.25) the payoff would double to 6 years.
2k for install is crazy cheap
Jun 8, 2025
38 Posts
Joined Feb 2015
Jun 8, 2025
ronald7410
Jun 8, 2025
38 Posts
Quote from profmason :
My Math on this:

I am in So Cal in a town where the city takes there own cut and thus electricity prices are ridiculous (Real rate calculated by taking bill and dividing by KHw is nearly $0.5 / kWh. I bought panels at 24 panels at $120 / 380 Watts call it $3K for nominal 9120 Watts but my real production is about 7800 peak 85% not bad. I bought an EG4 18KV off a guy who had planned to go off grid and an EG4 battery ~15Kwh battery to go with it for call it $8K. Another $2k in installation costs (12 panels on the flat patio cover needed angle brackets and welded up a angled patio cover on the side of the house for the other 12, some wire, flex, connectors, breaker to tie it to the panel. All in about $13K. Tax incentives cover ~1/3 so real cost is $9K. New california law only pays me $0.038 per KWh and charges me $.50 no wonder all the solar companies are going out of business. No way am I going to put power back into the grid at those prices.
My bill dropped from $400 to $150 / month. (My previous solar install under the old rules did drop to zero with no battery install required since the utility was paying me at the same rate they were charging. I get that there are infrastructure costs, but there is no way that infrastructure costs are 93% of costs. (In fact they publish that generation costs are 60%, pay us 60% and everyone would be happy)
Saving $250 month gives a payoff time of 3 years. This makes sense to me with the crazy rates in this city. It also insulates somewhat from future rate hikes. If your rates are in line with US average (about $.25) the payoff would double to 6 years.

Did you have to work through any permits or forms with socal Edison?
Jun 8, 2025
10 Posts
Joined Jul 2022
Jun 8, 2025
NavyHeat2657
Jun 8, 2025
10 Posts
Quote from SaL775720 :
When i checked with them this is what they said-end of June for UL1973 and end of July UL9540A
holy crap that's awesome. Are the inverters UL certified?
Jun 8, 2025
131 Posts
Joined Jan 2018
Jun 8, 2025
Wolfpack7483
Jun 8, 2025
131 Posts
Quote from tacomaguy20 :
Unfortunately these are for off grid use only.
No they're not. They're not for grid export, but you can definitely tie into the grid. Mine is set to transfer load to the grid when batteries get to a certain voltage. You can also set for grid charging of the batteries, solar only, or grid charging when solar isn't available.
Jun 8, 2025
42 Posts
Joined Jan 2006
Jun 8, 2025
zot
Jun 8, 2025
42 Posts
Does this qualify for the tax credits? Purchasing from ebay?
Jun 8, 2025
13 Posts
Joined Feb 2021
Jun 8, 2025
EagerWeather4495
Jun 8, 2025
13 Posts
Quote from zot :
Does this qualify for the tax credits? Purchasing from ebay?
Pretty sure there's no requirement on where you buy to qualify for the ITC. Read for yourself here, though, and make your own determination: https://www.irs.gov/credits-deduc...rgy-credit

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Jun 8, 2025
42 Posts
Joined Jan 2006
Jun 8, 2025
zot
Jun 8, 2025
42 Posts
Quote from EagerWeather4495 :
Pretty sure there's no requirement on where you buy to qualify for the ITC. Read for yourself here, though, and make your own determination: https://www.irs.gov/credits-deduc...rgy-credit

Thanks, still a good deal regardless
Jun 9, 2025
12 Posts
Joined Nov 2020
Jun 9, 2025
DeathAce
Jun 9, 2025
12 Posts
Quote from Wolfpack7483 :
No they're not. They're not for grid export, but you can definitely tie into the grid. Mine is set to transfer load to the grid when batteries get to a certain voltage. You can also set for grid charging of the batteries, solar only, or grid charging when solar isn't available.
Agreed
1
Jun 9, 2025
256 Posts
Joined Jan 2018
Jun 9, 2025
tacomaguy20
Jun 9, 2025
256 Posts
Quote from Wolfpack7483 :
No they're not. They're not for grid export, but you can definitely tie into the grid. Mine is set to transfer load to the grid when batteries get to a certain voltage. You can also set for grid charging of the batteries, solar only, or grid charging when solar isn't available.
That's typically what "off grid" means. Grid export is generally what is meant by "on grid". I haven't seen any "off grid" inverters that can't in some way be connected to the grid so the fact that it can transfer load to the grid or charge batteries from the grid is pretty standard of all "off grid" inverters. In fact, I don't think I've seen any off grid inverters that can't do that.
1
Jun 9, 2025
408 Posts
Joined Mar 2017
Jun 9, 2025
ihateu3
Jun 9, 2025
408 Posts
Would this be a good setup to use as a backup power system for my house that automatically switches on during an outage? Is that something a handy person like me could realistically wire up, or would it require a licensed electrician? And down the road, could I slowly add used solar panels to this system?
Even if I never end up using solar, is this still a good deal just for backup power alone?

20 Kwh sounds like quite a bit of storage, its a 1/4 of the battery in my M3 Performance.
Jun 9, 2025
291 Posts
Joined Dec 2014
Jun 9, 2025
vsluong
Jun 9, 2025
291 Posts
Quote from vsluong :
Do they still send you the rack if you ask?
Never mind, they updated the listing to state it includes a 6-tier (so 18U) rack with castors
Jun 9, 2025
35 Posts
Joined Apr 2017
Jun 9, 2025
jeremyhuytran
Jun 9, 2025
35 Posts
Wao, this is a big marked down. I already have 4 of their battery. Would they sell those inverter for $300?
Jun 10, 2025
3 Posts
Joined Mar 2025
Jun 10, 2025
cthetoy88
Jun 10, 2025
3 Posts
You can assist your load with the grid. I think people are confused with off grid.
You set this to provide your electrical load with solar and charge your battery at the same time. If the battery goes down a certain percentage or during cloudy days with solar not producing the power you need then the inverter will automatically switch to your grid. It will not send energy back to the grid if your batteries are full or your solar is producing more power than you need.

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Jun 10, 2025
150 Posts
Joined Jan 2007
Jun 10, 2025
davezncd
Jun 10, 2025
150 Posts
Quote from cthetoy88 :
You can assist your load with the grid. I think people are confused with off grid.
You set this to provide your electrical load with solar and charge your battery at the same time. If the battery goes down a certain percentage or during cloudy days with solar not producing the power you need then the inverter will automatically switch to your grid. It will not send energy back to the grid if your batteries are full or your solar is producing more power than you need.

I will second this this is what I do. It works perfectly.

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