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frontpage Posted by f12_26 | Staff • Last Sunday
frontpage Posted by f12_26 | Staff • Last Sunday

ECO-WORTHY 9840W Solar Kit (24 Panels, 10kW GroWatt Inverter, 8x 100Ah LP Battery)

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$8,800

$10,000

12% off
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Deal Details
eco-worthy-us via eBay has ECO-WORTHY 9840W Solar Kit (24x 410W Panels, 10kW GroWatt Inverter, 8x 100Ah LP Battery) on sale for $9999.99 - $1200 (12%) off savings automatically applied = $8799.99. Shipping is free.

Thanks to Staff Member f12_26 for sharing this deal.

Includes:
  • 24x 410W All Black Solar Panels
  • 1x 10000W 48V-120V/240V GroWatt Hybrid Inverter (10-Year EcoWorthy Warranty, UL 1741 Listed)
  • 8x Eco-Worthy 48V 100Ah (Version 3) LiFePO4 Battery (10-Year EcoWorthy Warranty)
  • Required accessories

Editor's Notes

Written by jimmytx | Staff
  • About this Store:
    • eco-worthy-us via eBay has a 98.9% positive feedback with over 117K items sold.
    • 30 days returns. Seller pays for return shipping.
  • Additional Information:
    • Offer valid through July 17, 2025 at 11:59PM PT, while supplies last.
    • This offer is $850 less (9% savings) than our front page deal price of $9649.99 from June 2025.
    • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by f12_26 | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
eco-worthy-us via eBay has ECO-WORTHY 9840W Solar Kit (24x 410W Panels, 10kW GroWatt Inverter, 8x 100Ah LP Battery) on sale for $9999.99 - $1200 (12%) off savings automatically applied = $8799.99. Shipping is free.

Thanks to Staff Member f12_26 for sharing this deal.

Includes:
  • 24x 410W All Black Solar Panels
  • 1x 10000W 48V-120V/240V GroWatt Hybrid Inverter (10-Year EcoWorthy Warranty, UL 1741 Listed)
  • 8x Eco-Worthy 48V 100Ah (Version 3) LiFePO4 Battery (10-Year EcoWorthy Warranty)
  • Required accessories

Editor's Notes

Written by jimmytx | Staff
  • About this Store:
    • eco-worthy-us via eBay has a 98.9% positive feedback with over 117K items sold.
    • 30 days returns. Seller pays for return shipping.
  • Additional Information:
    • Offer valid through July 17, 2025 at 11:59PM PT, while supplies last.
    • This offer is $850 less (9% savings) than our front page deal price of $9649.99 from June 2025.
    • Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by f12_26 | Staff

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synthesis77
1323 Posts
395 Reputation
Lot of wrong information in this thread. Here are corrections:1 - Yes, this will provide power to your house from battery and fall back to grid (or grid+existing solar) when low on battery.2 - No, you don't need a transfer switch, that's what the "hybrid" in off-grid inverters means. The inverter sits BETWEEN the grid and your house.3 - 40kwh is pretty huge and will likely run everything in your house 24/7. (but! see #4):4 - KWh is ENERGY, KW is POWER. Energy is how much you use in a day/month/etc. Power is how much you use in an instant. So, while 40kwh is lots of energy, 10kw is a medium amount of power. You will likely be able to run a smaller central A/C, but probably not at the SAME TIME as an electric water heater or electric stove or electric dryer. You'll have to add up the power ratings of the devices to see which combinations will fit in 10kw at any given time (accounting for startup loads too).5 - Everyone* in the US has split-phase which is what this inverter does. EDIT: It's unclear. Description says split-phase, inverter spec sheet says single phase. If it's single phase, you'll need an autoformer to get the neutral (easy).6 - Racking can be easy (but kinda expensive if you're doing rooftop, and, you don't want to screw it up and have leaks or flying panels). Ground mount can be as simple as putting down some weed stop fabric and lying the panels flat on top of it.7 - Do be careful, 500vdc can do some serious damage both to you and to flammable things nearby. It's not hard, but do your homework before messing about.8 - Yes, this qualifies for any tax incentives (really anything is if you claim it, and this would satisfy an audit).9 - No, your power company or permit office doesn't need to know, it's all "downstream" from them (and removable if needed).10 - As such, this does NOT backfeed the grid, but that's what the battery is for. EDIT this model MAY offer backfeed optionally, but you don't have to.11 - I don't know what this inverter supports as far as bypass current, meaning, how much grid power can go THROUGH it once you get past that 10kw. That would inform whether you could run EVERYTHING aim your house through it (like having a 40 amp main!) or whether you'd need a smaller subset of your house (like excluding an electric water heater or stove). Of course you could just make sure to not charge the car while running AC or things like that. EDIT: anyone know which exact GroWatt model? Maybe this: https://signaturesolar.com/conten...202405.pdf If so, specs say 62.5 amp pass thru (15kw) which is pretty good.Long story short, this is a pretty good turnkey setup. You can do cheaper with DIY, but you'd need a lot more knowledge and tolerance for risk.Finally, the setup with grid (and/or with existing grid-tied solar) is as follows:Meter Main -> (existing grid-tie solar) -> high loads panel (unbacked up) -> GroWatt INPUT -> GroWatt Output -> Backed up loads Subpanel -> loads.The hybrid inverter will have settings that allow you to switch whether the battery is used all the time (falling back to the grid when low) or only in a power outage. Even when using the grid, it will "add" your solar production to the loads (thus subtracting from your grid usage). All of this is automatic and seamless, you'll likely never notice again if your power goes out, it's that fast.
bogelo2
10 Posts
10 Reputation
Yes, you can if you have basic understanding on d/c and a/c wiring, and how electricity works. If you never wire anything, you will need to do a lot of reading (chatgpt, however they are not always right) and/or watching youtube videos. First, you will need to open your main breaker panel and check if you have a 240v split phase (newer standard) or other configuration. This inverter is a 120v single phase and if you have a 240V split phase, you cannot use it for any 240v appliances. In addition, you will need a transfer switch (auto or manual) and a subpanel. I wired a few Victron multiplus and you can DM me if you have any questions.
EDIT: according to the page, it is a 240v single phase (not 120v single phase) but one user says it is a 240v split phase. I am not sure which one it is as I never work on this particular inverter. If it is a single phase 240v, you may need to get a single phase voltage splitter (example: Victron Auto transformer) to work with U.S. grid and U.S appliances. Since this is a hybrid inverter (assuming it is), you will still need a manual transfer switch for safety and maintenance reason.

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5d ago
1,323 Posts
Joined Mar 2007
5d ago
synthesis77
5d ago
1,323 Posts

Our community has rated this post as helpful. If you agree, why not thank synthesis77

Lot of wrong information in this thread. Here are corrections:1 - Yes, this will provide power to your house from battery and fall back to grid (or grid+existing solar) when low on battery.2 - No, you don't need a transfer switch, that's what the "hybrid" in off-grid inverters means. The inverter sits BETWEEN the grid and your house.3 - 40kwh is pretty huge and will likely run everything in your house 24/7. (but! see #4):4 - KWh is ENERGY, KW is POWER. Energy is how much you use in a day/month/etc. Power is how much you use in an instant. So, while 40kwh is lots of energy, 10kw is a medium amount of power. You will likely be able to run a smaller central A/C, but probably not at the SAME TIME as an electric water heater or electric stove or electric dryer. You'll have to add up the power ratings of the devices to see which combinations will fit in 10kw at any given time (accounting for startup loads too).5 - Everyone* in the US has split-phase which is what this inverter does. EDIT: It's unclear. Description says split-phase, inverter spec sheet says single phase. If it's single phase, you'll need an autoformer to get the neutral (easy).6 - Racking can be easy (but kinda expensive if you're doing rooftop, and, you don't want to screw it up and have leaks or flying panels). Ground mount can be as simple as putting down some weed stop fabric and lying the panels flat on top of it.7 - Do be careful, 500vdc can do some serious damage both to you and to flammable things nearby. It's not hard, but do your homework before messing about.8 - Yes, this qualifies for any tax incentives (really anything is if you claim it, and this would satisfy an audit).9 - No, your power company or permit office doesn't need to know, it's all "downstream" from them (and removable if needed).10 - As such, this does NOT backfeed the grid, but that's what the battery is for. EDIT this model MAY offer backfeed optionally, but you don't have to.11 - I don't know what this inverter supports as far as bypass current, meaning, how much grid power can go THROUGH it once you get past that 10kw. That would inform whether you could run EVERYTHING aim your house through it (like having a 40 amp main!) or whether you'd need a smaller subset of your house (like excluding an electric water heater or stove). Of course you could just make sure to not charge the car while running AC or things like that. EDIT: anyone know which exact GroWatt model? Maybe this: https://signaturesolar.com/conten...202405.pdf If so, specs say 62.5 amp pass thru (15kw) which is pretty good.Long story short, this is a pretty good turnkey setup. You can do cheaper with DIY, but you'd need a lot more knowledge and tolerance for risk.Finally, the setup with grid (and/or with existing grid-tied solar) is as follows:Meter Main -> (existing grid-tie solar) -> high loads panel (unbacked up) -> GroWatt INPUT -> GroWatt Output -> Backed up loads Subpanel -> loads.The hybrid inverter will have settings that allow you to switch whether the battery is used all the time (falling back to the grid when low) or only in a power outage. Even when using the grid, it will "add" your solar production to the loads (thus subtracting from your grid usage). All of this is automatic and seamless, you'll likely never notice again if your power goes out, it's that fast.
Last edited by synthesis77 July 9, 2025 at 09:00 AM.
3
5d ago
1,323 Posts
Joined Mar 2007
5d ago
synthesis77
5d ago
1,323 Posts
Quote from bogelo2 :
It looks like a single phase 240v for both output from the page. Might not be useful for U.S. grid.
It "looks" like this one which is both split-phase AND parallelable:

https://signaturesolar.com/growat...0tl-hu-us/

That would be good news for anyone needing more than 10kw of power: slap another one in and run your whole house no problem. Also, spec sheet says 62.5amp pass thru, so maybe you won't even need another.

Wow, it's an expensive inverter though. It's almost 10 TIMES as expensive as each of my PowMr 6.2k LIP parallel inverters…
Last edited by synthesis77 July 9, 2025 at 08:59 AM.
1
5d ago
10 Posts
Joined Sep 2024
5d ago
bogelo2
5d ago
10 Posts
Quote from synthesis77 :
It "looks" like this one which is both split-phase AND parallelable:https://signaturesolar.com/growat...0tl-hu-us/That would be good news for anyone needing more than 10kw of power: slap another one in and run your whole house no problem. Also, spec sheet says 62.5amp pass thru, so maybe you won't even need another.Wow, it's an expensive inverter though. It's almost 10 TIMES as expensive as each of my PowMr 6.2k LIP parallel inverters…
I would confirm with the seller. The ebay site says a different spec and I am not sure if you are getting the same one as the signature solar one.
5d ago
1,323 Posts
Joined Mar 2007
5d ago
synthesis77
5d ago
1,323 Posts
agreed, weights are different too (42.5kg vs 48kg) even though most of the other specs are the same. I sent a message to the seller since I'm curious (and totally wasting my time this morning 😜)
5d ago
892 Posts
Joined Nov 2011
5d ago
NotYetRated
5d ago
892 Posts
Quote from synthesis77 :
Lot of wrong information in this thread. Here are corrections:1 - Yes, this will provide power to your house from battery and fall back to grid (or grid+existing solar) when low on battery.2 - No, you don't need a transfer switch, that's what the "hybrid" in off-grid inverters means. The inverter sits BETWEEN the grid and your house.3 - 40kwh is pretty huge and will likely run everything in your house 24/7. (but! see #4):4 - KWh is ENERGY, KE is POWER. Energy is how much you use in a day/month/etc. Power is how much you use in an instant. So, while 40kwh is lots of energy, 10kw is a medium amount of power. You will likely be able to run a smaller central A/C, but probably not at the SAME TIME as an electric water heater or electric stove or electric dryer. You'll have to add up the power ratings of the devices to see which combinations will fit in 10kw at any given time (accounting for startup loads too).5 - Everyone* in the US has split-phase which is what this inverter does. EDIT: It's unclear. Description says split-phase, inverter spec sheet says single phase. If it's single phase, you'll need an autoformer to get the neutral (easy).6 - Racking can be easy (but kinda expensive if you're doing rooftop, and, you don't want to screw it up and have leaks or flying panels). Ground mount can be as simple as putting down some weed stop fabric and lying the panels flat on top of it.7 - Do be careful, 500vdc can do some serious damage both to you and to flammable things nearby. It's not hard, but do your homework before messing about.8 - Yes, this qualifies for any tax incentives (really anything is if you claim it, and this would satisfy an audit).9 - No, your power company or permit office doesn't need to know, it's all "downstream" from them (and removable if needed).10 - As such, this does NOT backfeed the grid, but that's what the battery is for. EDIT this model MAY offer backfeed optionally, but you don't have to.11 - I don't know what this inverter supports as far as bypass current, meaning, how much grid power can go THROUGH it once you get past that 10kw. That would inform whether you could run EVERYTHING aim your house through it (like having a 40 amp main!) or whether you'd need a smaller subset of your house (like excluding an electric water heater or stove). Of course you could just make sure to not charge the car while running AC or things like that. EDIT: anyone know which exact GroWatt model? Maybe this: https://signaturesolar.com/conten...202405.pdf If so, specs say 62.5 amp pass thru (15kw) which is pretty good.Long story short, this is a pretty good turnkey setup. You can do cheaper with DIY, but you'd need a lot more knowledge and tolerance for risk.Finally, the setup with grid (and/or with existing grid-tied solar) is as follows:Meter Main -> (existing grid-tie solar) -> high loads panel (unbacked up) -> GroWatt INPUT -> GroWatt Output -> Backed up loads Subpanel -> loads.The hybrid inverter will have settings that allow you to switch whether the battery is used all the time (falling back to the grid when low) or only in a power outage. Even when using the grid, it will "add" your solar production to the loads (thus subtracting from your grid usage). All of this is automatic and seamless, you'll likely never notice again if your power goes out, it's that fast.
Alright so whats the ideal setup when I have Powerwall 3+existing solar, grid tied and backfeeding to utility already. Mater Main -> Tesla Gateway/Powerwall 3's -> Main panel with loads -> growatt panel with batteries tied in with certain other loads?
5d ago
1,323 Posts
Joined Mar 2007
5d ago
synthesis77
5d ago
1,323 Posts
First, try not to break the /quote tag, it's pretty hard to read. Second, if you have a powerwall 3 and solar already, why would you get this? You should already have whole house backup and backfeed. If you really wanted to, however, just insert this device in between a subpanel you want backed up. Really though, just add another gridtied inverter and more solar panels for 1/5 the cost.
4d ago
1,835 Posts
Joined Dec 2013
4d ago
MichaelM3467
4d ago
1,835 Posts
Quote from winterdealhot :
This set will give you 40kwh stored electricity, which is almost enought to run a small to medium house off grid during sunny days. I have a big house and the central AC can drain the battery down quickly. My solution is to install 2 window AC (or split units) in 2 rooms selected strategically. This setup can run the whole house without the central AC
we have a large house, stopped using central air just use window units. We are in the south with 100+ days high humidity. All electric appliances and large pool. Drafty poorly insulated bad windows no heat blocking. Tons of compuers and tvs on all day. We do have gas water heater though. We barely use 30kwh a day on average. Also keep in mind the 40kwh is the fuel tank.

The real question is if you can generate 40kwh a day from 10kwh panels. and do you have the space for the panels.

With a battery bank this large the real question is you will get through the year. Assuming you installed dead batteries at the end of summer I would easily get through a typical year. IF i had space for 24 400w panels. I wouldn't want a roof installd and most of my property is tree covered the front yard would be ideal but the neighbors would freak. LOL.

Thinking about buying this just for the batteries and sell the panels and inverter. Would love to have a day worth of backup power before I had to kick on the gas generator.

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3d ago
27 Posts
Joined Oct 2012
3d ago
Tvdeal
3d ago
27 Posts
I searched online it is qualified for Federal tax return for 30% of the cost. I am in Arizona which provides sale tax exemption for solar. But I am not sure if this would work through Ebay purchase?
3d ago
27 Posts
Joined Oct 2012
3d ago
Tvdeal
3d ago
27 Posts
Quote from synthesis77 :
Lot of wrong information in this thread. Here are corrections:1 - Yes, this will provide power to your house from battery and fall back to grid (or grid+existing solar) when low on battery.2 - No, you don't need a transfer switch, that's what the "hybrid" in off-grid inverters means. The inverter sits BETWEEN the grid and your house.3 - 40kwh is pretty huge and will likely run everything in your house 24/7. (but! see #4):4 - KWh is ENERGY, KE is POWER. Energy is how much you use in a day/month/etc. Power is how much you use in an instant. So, while 40kwh is lots of energy, 10kw is a medium amount of power. You will likely be able to run a smaller central A/C, but probably not at the SAME TIME as an electric water heater or electric stove or electric dryer. You'll have to add up the power ratings of the devices to see which combinations will fit in 10kw at any given time (accounting for startup loads too).5 - Everyone* in the US has split-phase which is what this inverter does. EDIT: It's unclear. Description says split-phase, inverter spec sheet says single phase. If it's single phase, you'll need an autoformer to get the neutral (easy).6 - Racking can be easy (but kinda expensive if you're doing rooftop, and, you don't want to screw it up and have leaks or flying panels). Ground mount can be as simple as putting down some weed stop fabric and lying the panels flat on top of it.7 - Do be careful, 500vdc can do some serious damage both to you and to flammable things nearby. It's not hard, but do your homework before messing about.8 - Yes, this qualifies for any tax incentives (really anything is if you claim it, and this would satisfy an audit).9 - No, your power company or permit office doesn't need to know, it's all "downstream" from them (and removable if needed).10 - As such, this does NOT backfeed the grid, but that's what the battery is for. EDIT this model MAY offer backfeed optionally, but you don't have to.11 - I don't know what this inverter supports as far as bypass current, meaning, how much grid power can go THROUGH it once you get past that 10kw. That would inform whether you could run EVERYTHING aim your house through it (like having a 40 amp main!) or whether you'd need a smaller subset of your house (like excluding an electric water heater or stove). Of course you could just make sure to not charge the car while running AC or things like that. EDIT: anyone know which exact GroWatt model? Maybe this: https://signaturesolar.com/conten...202405.pdf If so, specs say 62.5 amp pass thru (15kw) which is pretty good.Long story short, this is a pretty good turnkey setup. You can do cheaper with DIY, but you'd need a lot more knowledge and tolerance for risk.Finally, the setup with grid (and/or with existing grid-tied solar) is as follows:Meter Main -> (existing grid-tie solar) -> high loads panel (unbacked up) -> GroWatt INPUT -> GroWatt Output -> Backed up loads Subpanel -> loads.The hybrid inverter will have settings that allow you to switch whether the battery is used all the time (falling back to the grid when low) or only in a power outage. Even when using the grid, it will "add" your solar production to the loads (thus subtracting from your grid usage). All of this is automatic and seamless, you'll likely never notice again if your power goes out, it's that fast.
I am planning to hook up all loads to solar while keep utility as auxiliary. My whole house load would be medium (I have mini spilit ACs for all rooms and can turn off water heater during AC/summer months. The only concern is the downstairs AC with stove running at the same time).

Is this 240 split phase? My home is supplied by 240v split phase. What is the configuration for this scenario? Utility -> GroWatt INPUT -> GroWatt Output -> Backed up loads Subpanel -> loads?

My utility charges for high account fees for solar generation account. I'd like to see if I can install this myself without noticing the utility. Anything I can learn from online resource, such as Youtube, for the DIY installation?
3d ago
1,323 Posts
Joined Mar 2007
3d ago
synthesis77
3d ago
1,323 Posts
So yes, I guessed right, it is the SPH10000TL-HU. I confirmed with the seller who first said "GW 10KW 48Vdc-120/240Vac machine" which, uh, not helpful, but I followed up and got the actual model.Given the cost and extremely high feature set of the SPH10000TL-HU, I'd say this goes from a good deal to a very good deal.This inverter supports up to 6 parallel, seems to support both backfeed or zero export, has 10kw inverter/15kw solar with lots of MPPT trackers, and 62a pass through.ps. I have no affiliation with the seller, and usually don't recommend "all in one" style packages, but this seems legit for a client with enough knowledge to install but not enough to DIY the building of a system.
2d ago
261 Posts
Joined Nov 2008
2d ago
crosjn
2d ago
261 Posts
So with zero export, does anyone know if you can not buy "solar" energy plans? This probably isn't large enough to power our house completely and the bonus costs of a solar electricity plan really eat into the ROI if you aren't basically net producing electricity for the grid. (I'm in Texas within TXU services if that helps anyone.)
In Texas, a solar plan thru anyone in our area adds 50% more for every KWH used. 5Ton ac + pool pump in a family of 4 w/ a "super" energy efficient house built in the 70's. Peak summer is a bunch of electricity.
TYIA!
Jeff
9h ago
20 Posts
Joined May 2008
9h ago
auralfan
9h ago
20 Posts
Quote from crosjn :
So with zero export, does anyone know if you can not buy "solar" energy plans? This probably isn't large enough to power our house completely and the bonus costs of a solar electricity plan really eat into the ROI if you aren't basically net producing electricity for the grid. (I'm in Texas within TXU services if that helps anyone.) In Texas, a solar plan thru anyone in our area adds 50% more for every KWH used. 5Ton ac + pool pump in a family of 4 w/ a "super" energy efficient house built in the 70's. Peak summer is a bunch of electricity.TYIA!Jeff
Don't want to get too off-topic, but reading up on other sites on this, seems your best bet if in Texas is to assess your power usage via:
https://www.smartmetertexas.com/home
...and then compare what plan might work best for you via:
https://www.texaspowerguide.com/s...ans-texas/
9h ago
1,323 Posts
Joined Mar 2007
9h ago
synthesis77
9h ago
1,323 Posts
yes, zero-export (any normal hybrid inverter) means your utility company will never know you have solar — it's all downstream from the grid.

I've run this way for 4 years or so, most often using zero PG&E. So yes, @crosjn and @Tvdeal, you could install this and stay on your existing non-solar plan.

Jeff, since your instantaneous power demand is pretty extreme (big AC plus pool), you might be better off just getting several cheaper 240v parallel hybrid inverters and a ton of used solar panels. You're never gonna keep up battery-wise with those loads when the sun goes down, but pool+AC is generally a sunny time thing.

I wholeheartedly recommend the PowMr POW-HVM6.2K-48V-LIP inverters I just started using. They're literally $300 each shipped on Ali, and can do up to 9 in parallel with both 6.2kw of solar and 6.2kw of output each. Pair them with a pile of used solar (and a low-ish capacity battery) and you can run your whole house for cheap. You will need a center-tap transformer for the neutral for split-phase, or, just use it exclusively for 240v loads.

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