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Battery inverterLG Electronics

LG Electronics P250KH53231

Battery inverter, ac-coupled battery inverter. 1 model, 250 kW AC at 480 V.

CEC listed · Oct 21, 2021

Rated AC power250 kW
CEC weighted efficiency97.0%

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power250 kW
CEC-measured continuous output250.4 kW
Grid voltage480 V
Phase3-phase 480 V

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library

CEC weighted efficiency97.0%
Night-time standby (tare)4.21 W
Power to start converting807.9 W

CEC weighted efficiency is measured by an accredited lab at six power levels and three DC voltages — the number to compare between inverters.

Grid & smart-inverter certification

CEC Grid Support Inverter List (Oct 7, 2026)

UL 1741 SB (3rd ed.)No
UL 1741 SA (SA8–SA13)Yes — TUV Rheinland of North America
Firmware tested (SA)01.00
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)Yes
CSIP (IEEE 2030.5) conformanceYes — SunSpec Alliance, Jul 3, 2020
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedOct 21, 2021
CEC noteEfficiency data inclusive of transformer effect based on 300 kVA Low-Voltage Dry-Type Distribution Transformers Table in DOE2016.

UL 1741 SB is required for new interconnections in California (Rule 21) since 2026.

Questions & answers

How efficient is the LG Electronics PxxxKH53231?

The California Energy Commission lists a weighted efficiency of 97.0% for LG Electronics PxxxKH53231 models, measured at six power levels and three DC voltages.

Is the LG Electronics PxxxKH53231 certified to UL 1741 SB?

The CEC list does not show UL 1741 SB certification for these models.

Can the LG Electronics PxxxKH53231 be used with a battery?

The CEC lists it as a ac-coupled battery inverter.

What is the P250KH53231’s DC input voltage range?

CEC tested it at 750–1,000 V DC.

Sources

California Energy Commission — Grid Support Inverter List (solar and battery inverters), data as of Oct 7, 2026. Manufacturer-reported, confirmed by CEC against certificates and test reports.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).