GoodWe GW11K4-ES-US20

Hybrid inverter, dc-coupled hybrid (pv + battery). 1 model, 11.4 kW AC at 240 V.

UL 1741 SBCEC listed · Jan 23, 2023

Rated AC power11.4 kW
CEC weighted efficiency97.0%

DC input (PV side)

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

CEC test DC voltages (min / nom / max)270 / 390 / 500 V
DC input at rated output (CEC test)11.8 kW

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power11.4 kW
CEC-measured continuous output11.4 kW
Grid voltage240 V
Phasesplit-phase 120/240 V

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)5.62 W
Power to start converting27.7 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.)Yes — CSA Group, certificate Jul 19, 2022
UL 1741 SA (SA8–SA13)No
Volt-VAr with reactive power priority (SA13)No
Freq-Watt / Volt-Watt (SA14–15)No
Disable permit service / limit active power (SA17–18)No
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Jan 23, 2023)
Power control system (PCS)Stated in CEC listing (power control system)
CEC listedJan 23, 2023

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

Panel compatibility & string sizing

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

CityColdest air, °CHottest cell, °C

GW11K4-ES-US20: max DC 500 V · MPPT 270–500 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	9–10	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	9–10	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	11–12	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	11–12	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	10–12	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	10–12	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	10–12	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	10–12	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	6–7	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	11–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	10–12	—
Tesla TSP-420	420 W	43.4 V	27.7 V	10–11	—

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

Compare with similar 11.4 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
GoodWe GWxxK4-ES-US20	11.4 kW–11.4 kW	97.0%	270–500 V	Yes	2023	0
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 GoodWe

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerGoodWe
Listed in CEC asGoodWe Technologies Co., Ltd.
Websitegoodwe.com
Models on CEC lists715

Other series

GEHx.x-1U-US20GWxxxx-ES-US20GEHx.x-1U-US10GEHx.x-1U-USx.xGWxxxxA-ESGWxxxxH-ES

Questions & answers

How efficient is the GoodWe GWxxK4-ES-US20?

The California Energy Commission lists a weighted efficiency of 97.0% for GoodWe GWxxK4-ES-US20 models, measured at six power levels and three DC voltages.

Is the GoodWe GWxxK4-ES-US20 certified to UL 1741 SB?

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

Can the GoodWe GWxxK4-ES-US20 be used with a battery?

The CEC lists it as a dc-coupled hybrid (pv + battery).

What is the GW11K4-ES-US20’s DC input voltage range?

CEC tested it at 270–500 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).
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 — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).