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LG RESU16H Prime - Specs, Cost & Full Review

High capacity single-unit battery from LG Chem. Good choice for homes with high energy usage.

Capacity
16 kWh

Usable energy storage

Power Output
7 kW

Continuous AC power

Efficiency
95%

Round-trip efficiency

Warranty
10 years

29,200 kWh throughput

Cost & Tax Credit

Average Installed Cost

$11,000

Range: $10,000–$14,000

Federal ITC (30%)

-$3,300

Qualifies with solar system

Net Cost After ITC

$7,700

Your effective investment

ITC Eligibility: The LG RESU16H Prime qualifies for the 30% federal Investment Tax Credit when installed with a solar system, or as a standalone unit charged exclusively by solar. File IRS Form 5695 with your federal return. Calculate your credit →

Technical Specifications

BrandLG
ModelRESU16H Prime
Battery ChemistryLithium Nickel Manganese Cobalt (NMC)
Usable Capacity16 kWh
Continuous Power Output7 kW
Round-Trip Efficiency95%
Warranty Duration10 years
Warranty Throughput29,200 kWh
Grid-Tied OperationYes
Off-Grid CapableNo
Scalable / StackableNo
Market Share (US)10%
Average Installed Cost$10,000–$14,000

Pros & Cons

Pros

  • Large 16 kWh capacity in single unit
  • Compatible with most inverter brands
  • Proven LG Chem battery cells

Cons

  • Not scalable (single unit)
  • LG Chem restructured; support concerns
  • Lower power output for size

Is the LG RESU16H Prime Worth It?

The LG RESU16H Prime offers the most storage capacity in a single unit (16 kWh), making it appealing for high-usage homes. Broad inverter compatibility is a genuine advantage over ecosystem-locked competitors. The main concern: LG's restructuring has raised questions about long-term support, though LG Energy Solution continues operating. Because it's not scalable, you're committing to 16 kWh at purchase - which is excellent if you need that much, but wasteful if you don't.

vs. Tesla Powerwall 3 (Market Leader)

The LG RESU16H Prime beats Powerwall 3 on raw capacity (16 kWh vs. 13.5 kWh) and broad inverter compatibility. Powerwall wins on power output (11.5 kW vs. 7 kW), efficiency (97.5% vs. 95%), and ecosystem integration. At comparable installed costs ($11,000-$16,000 range for both), Powerwall's output advantage makes it better for homes with high simultaneous loads.

Read Tesla Powerwall 3 Review

Works Best With

SolarEdgeSMA Sunny Boy StorageFroniusKOSTALSungrow

Compatibility based on manufacturer specifications. Always confirm compatibility with your installer before purchase.

LG RESU16H Prime - FAQ

LG Energy Solution (the battery division, separate from LG Electronics) continues to manufacture and support the RESU product line. Following the 2022 spin-off from LG Chem, LG Energy Solution remains one of the world's largest battery manufacturers with ongoing US market support.
The RESU16H Prime uses a 48V DC interface compatible with a wide range of hybrid and battery-ready inverters including SolarEdge StorEdge, SMA Sunny Boy Storage, Fronius GEN24, KOSTAL PLENTICORE, and Sungrow SH series. This broad compatibility is a key advantage.
The LG RESU16H Prime offers 16 kWh of capacity versus 13.5 kWh for the Tesla Powerwall 3 — nearly 19% more storage in a single unit. However, the Powerwall offers 11.5 kW of power output versus 7 kW for the RESU, making Powerwall better suited for simultaneous high-load scenarios.
No, the RESU16H Prime is a single-unit system and cannot be daisy-chained. If you need more than 16 kWh of storage, you would need to choose a scalable system like Enphase IQ or Tesla Powerwall, or install a different battery chemistry.
Yes, it qualifies for the 30% federal ITC when paired with solar. The 16 kWh capacity at an average installed cost of ~$11,000 translates to a $3,300 federal credit, bringing net cost to approximately $7,700.

Compare Other Batteries

Tesla

Powerwall 3

13.5 kWh

Enphase

IQ Battery 5P

5 kWh

SolarEdge

Home Battery 48V

9.7 kWh

Generac

PWRcell

9 kWh

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Specifications sourced from manufacturer documentation. Pricing based on EnergySage installer data • Updated 2026.