20.5 × 34.3 × 11.2 in

Hybrid inverterEG4 Electronics

EG4 Electronics 18KPV-12LV

Name: EG4 Electronics 18KPV-12LV
Brand: EG4 Electronics

Hybrid inverter, dc-coupled hybrid (pv + battery). 2 models, 10.4 kW–12 kW AC at 208 V / 240 V. used with power optimizers.

UL 1741 SBCEC listed · Jun 21, 2023Rapid shutdownInstalled in 7 SoCal permits

Model

Rated AC power12 kW
CEC weighted efficiency97.0%
MPPT trackers3
Warranty10 years

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · building permits · 2 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB	In permits
18KPV-12LV	10.4 kW	208 V	10.5 kW	10.5 kW	96.5%	230–480 V	Jun 21, 2023	SB	7
18KPV-12LV	12 kW	240 V	11.9 kW	11.9 kW	97.0%	230–480 V	Jun 21, 2023	SB	7

Some models are also on the CEC Battery Inverter list — one product, two listings.

DC input (PV side)

EG4 Electronics datasheet · CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library

MPPT operating range140–500 V
CEC test DC voltages (min / nom / max)230 / 360 / 480 V
Start-up voltage100 V
MPPT trackers3
DC input at rated output (CEC test)12.3 kW

AC output (grid side)

EG4 Electronics datasheet · CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power12 kW
Max apparent power13,500 VA
CEC-measured continuous output11.9 kW
Grid voltage208 V / 240 V
Phase208 V (1-phase of 3-phase service), split-phase 120/240 V
Frequency50 Hz
Max continuous output current50 A

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)14.29 W
Power to start converting23.6 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) · EG4 Electronics datasheet

UL 1741 SB (3rd ed.)Yes — Intertek, certificate Apr 3, 2025
UL 1741 SA (SA8–SA13)Yes — Intertek
Firmware tested (SA)fA1.0
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) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Feb 21, 2024)
Power control system (PCS)Stated in CEC listing (power control system)
CEC listedJun 21, 2023
Last CEC updateJun 2, 2025
Standards listed on the datasheetUL 1741, UL 1741 SA, IEEE 1547, UL 1699B, FCC Part 15, CA Rule 21, NEC 690.12 (rapid shutdown)

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

Safety & protection

EG4 Electronics datasheet

Rapid shutdown (NEC 690.12)Yes (NEC 690.12, datasheet)
Arc-fault protection (UL 1699B)Yes — UL 1699B

Monitoring & communication

EG4 Electronics datasheet

InterfacesWi-Fi, RS485

Size, weight & environment

EG4 Electronics datasheet

Dimensions (W × H × D)20.5 × 34.3 × 11.2 in
Weight121.3 lb (55 kg)
Operating temperature−25 to +60 °C

Warranty

EG4 Electronics datasheet

Standard warranty10 years

Full terms — see the warranty document under Documents.

Panel compatibility & string sizing

NLR SAM inverter library · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation

CityColdest air, °CHottest cell, °C

18KPV-12LV: max DC 480 V · MPPT 230–480 V (CEC test window)

Most-permitted panels in Southern California

Panel	Power	Voc cold	Vmp hot	Panels per string	Installed together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410	410 W	48.1 V	30.6 V	8–9	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	8–9	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	10–12	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	10–12	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	9–11	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	9–11	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	9–11	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	9–11	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	5–6	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	10–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	9–11	—
Tesla TSP-420	420 W	43.4 V	27.7 V	9–11	—

Usually installed with power optimizers: string length follows the optimizer rules, not panel voltage — use the manufacturer’s designer.

Voltage check only, from CEC panel data and NLR weather for the city. Final design must follow the inverter manual and NEC 690.7.

Battery & storage pairings

building permits

Batteries installed with it in SoCal

EG4 (model not specified)

What it's installed with

building permits

Panels

Hyundai Energy Solutions HiS-SxxxYH(BK)

Optimizers

Tigo TS4

Batteries

EG4 (model not specified)

Permits naming both; 7 of 7 permits list other equipment.

Installed in Southern California

building permits

Permits name it

Dec 2024 – Apr 2026

Jurisdictions so far

LA County (unincorp.) (6), Palmdale (1)

9.7 kW

Typical system

median of 1 permits

Permits over time

Model named in permit

18KPV-12LV

Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.) come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Who installs 18KPV-12LV in SoCal

building permits · CSLB License Master

Enpower Star LLC

Chatsworth · CSLB #1112396

1 installDec 2024Palmdale

Compare with similar 12 kW inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits

Inverter	Power	CEC weighted eff.	DC test window	UL 1741 SB	Latest CEC	SoCal permits
EG4 Electronics 18KPV-12LV	10.4 kW–12 kW	97.0%	230–480 V	Yes	2023	14
SolarEdge SExxxxH-US	3 kW–11.4 kW	99.0%	360–480 V	Yes	2025	1,046
Delta Electronics Ex-TL-US	3.33 kW–9.6 kW	97.5%	200–480 V	Yes	2022	28
SolarEdge SExxxxxA-US	3.8 kW–11.4 kW	98.0%	320–500 V	No	2024	18
Growatt MIN xxxxTL-XH-US	2.63 kW–11.4 kW	98.0%	125–480 V	Yes	2021	15

Same type and grid voltage, power range covering this model; same fields from the same sources.

About EG4 Electronics

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerEG4 Electronics
Listed in CEC asEG4 Electronics LLC
Websiteeg4electronics.com
Models on CEC lists630

Other series

IV-xxxxx-HYB-AW-FX-xxIV-8000-HYB-AW

Documents

manufacturer documents

PDF
EG4 18KPV 12LV – Spec-Sheet
Datasheet · EG4 Electronics · Apr 2026
PDF
18kPV-12LV Warranty Document 1.1.0
Warranty · EG4 Electronics · Sep 2024

Questions & answers

How efficient is the EG4 Electronics 18KPV-12LV?

The California Energy Commission lists a weighted efficiency of 96.5–97.0% for EG4 Electronics 18KPV-12LV models, measured at six power levels and three DC voltages.

What sizes does the EG4 Electronics 18KPV-12LV come in?

The CEC list includes 2 models from 10.4 kW to 12 kW AC: 18KPV-12LV, 18KPV-12LV.

Is the EG4 Electronics 18KPV-12LV certified to UL 1741 SB?

Yes — the CEC Grid Support Inverter List shows UL 1741 SB for all models.

Can the EG4 Electronics 18KPV-12LV be used with a battery?

The CEC lists it as a dc-coupled hybrid (pv + battery). In Southern California permits it was installed with EG4 (model not specified).

What is the 18KPV-12LV’s DC input voltage range?

MPPT operating range 140–500 V. CEC tested it at 230–480 V DC.

What warranty does it have?

10 years standard (manufacturer datasheet).

Who installs it in Southern California?

Building permits name this series 7 times (Dec 2024 – Apr 2026). The most active licensed installers are Enpower Star LLC.

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.
EG4 Electronics — datasheet EG4 18KPV 12LV – Spec-Sheet.
EG4 Electronics — manufacturer datasheet “20.5 in. (520mm) EG4® 18kPV HYBRID INVERTER”.
EG4 Electronics — document library on the manufacturer’s website (links above).
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
California Energy Commission — PV Module List (module electrical data for the compatibility check).
Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Jan 2025 – Apr 2026); City of Palmdale (Dec 2024). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).