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ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current
ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current, view 2ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current, view 3ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current, view 4ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current, view 5ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current, view 6
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ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW 120/208Y Vac Output | 28.8KW PV Input | 360A Charge/Discharge Current

$3,800$4,300Save 12%

In stock at eco-worthy.com

The Liber 18KT is an 18kW three-phase off-grid inverter delivering 120/208Y VAC, with 28.8kW of PV input across dual MPPT trackers and 360A of battery charge and discharge current. Up to six units can run in parallel for 108kW. At $3,799.99 it is built for farms, workshops, and small factories with three-phase equipment.

Shop now at ECO-WORTHY →

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Highlights

  • 18kW three-phase output, 120/208Y VAC
  • 28.8kW PV input, dual MPPT
  • 360A charge and discharge current
  • Parallel up to 6 units (108kW)
  • Works with LiFePO4 and lead-acid, auto BMS adaptation

Best for

Farms and workshops running three-phase motors off-grid.

Things to consider

  • Battery voltage, certifications, and weight are not listed.
  • Professional installation is almost certainly needed.
  • 120/208Y is not standard U.S. residential split phase; confirm your loads.

Key specs

Price$3,800
Output18kW, 120/208Y VAC three-phase
PV input28.8kW, dual MPPT
Battery current360A charge/discharge
ParallelUp to 6 units

Our take

A niche but capable three-phase inverter; get full specs and an installer first.

ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter | 18KW… at a glance

BrandECO-WORTHY
Price$3,800 (was $4,300)
Typecharge inverter
AvailabilityIn stock at eco-worthy.com
ReturnsDamaged, wrong, or non-working items must be reported within 14 days, and ECO-WORTHY…

Price check

At $3,800, the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter is toward the top of ECO-WORTHY's price range, whose 51 listed products run $15.99 to $21,000.

It's currently 12% below its listed price of $4,300. Sale prices can end without notice, so check the live price before you order.

Similar items from other brands we track run $34.99 to $229.

Buying from ECO-WORTHY

ECO-WORTHY is a strong pick for DIY solar builders and RV owners who want LiFePO4 batteries and complete kits at prices well below the premium brands. Skip it if you want an installer-backed, plug-and-play system with local service. Before buying, read the return terms closely: change-of-mind returns are on you to ship back, and the refund page describes them as a partial refund.

Shipping
Orders process in 1 to 3 business days, then ship in 3 to 5 business days from the US or Canada warehouse (3 to 7 from EU, UK, AU), tracked. Large panel kits ship by freight in 5 to 14 business days.
Returns
Damaged, wrong, or non-working items must be reported within 14 days, and ECO-WORTHY covers return shipping. Other returns are accepted within 30 days in new condition with original packaging, with return shipping paid by the buyer.
Warranty
The FAQ states a 10-year warranty on batteries covering non-human-induced failure. Modified products void the warranty.

Read our full ECO-WORTHY review and shop all products →

Frequently asked questions

Can I use the Liber 18KT in a house?
It outputs three-phase 120/208Y, which suits commercial and farm loads rather than typical U.S. split-phase homes.
What batteries does it support?
LiFePO4 and lead-acid, with automatic BMS adaptation per the listing.
Is the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter on sale?
Yes. ECO-WORTHY lists it at $3,800, down from $4,300 (12% off). Sale prices change, so confirm the live price on eco-worthy.com.
Is there a discount on the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter?
ECO-WORTHY publishes these ways to save: $10 off first purchase for joining; ECO-WORTHY Rewards points; Give $25, get $25 referral; 5% military discount. ECO-WORTHY sets the terms, which can change; our ECO-WORTHY coupons page has the details.
What is ECO-WORTHY's return policy?
Damaged, wrong, or non-working items must be reported within 14 days, and ECO-WORTHY covers return shipping. Other returns are accepted within 30 days in new condition with original packaging, with return shipping paid by the buyer.
How long does ECO-WORTHY take to ship?
Orders process in 1 to 3 business days, then ship in 3 to 5 business days from the US or Canada warehouse (3 to 7 from EU, UK, AU), tracked. Large panel kits ship by freight in 5 to 14 business days.
Does the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter come with a warranty?
ECO-WORTHY's published warranty terms: The FAQ states a 10-year warranty on batteries covering non-human-induced failure. Modified products void the warranty.
Where can I buy the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter?
The ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter is sold directly by ECO-WORTHY on eco-worthy.com. The Shop now button on this page goes straight to the product there.
Is the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter in stock?
Yes. ECO-WORTHY lists it as in stock on eco-worthy.com as of our latest check. Stock and prices refresh throughout the day.
Is ECO-WORTHY a legit store?
ECO-WORTHY is a strong pick for DIY solar builders and RV owners who want LiFePO4 batteries and complete kits at prices well below the premium brands. Skip it if you want an installer-backed, plug-and-play system with local service. Before buying, read the return terms closely: change-of-mind returns are on you to ship back, and the refund page describes them as a partial refund. Our full ECO-WORTHY review covers shipping, returns and what to check before ordering.
Is the ECO-WORTHY Liber 18KT Off-grid Three-phase Inverter expensive?
At $3,800 it is toward the top of ECO-WORTHY's range ($15.99 to $21,000 across 51 products), and similar items from other brands run $34.99 to $229.

More from ECO-WORTHY

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