GoodWe GW28KLV-SMT-US

Name: GoodWe GW28KLV-SMT-US
Brand: GoodWe

String inverter. 4 models, 22 kW–28 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · Nov 12, 2024

Model

Rated AC power28 kW
CEC weighted efficiency97.0%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 4 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
GW22KLV-SMT-US	22 kW	208 V	22.2 kW	22.2 kW	97.0%	350–750 V	Nov 12, 2024	SB
GW22KLV-SMT-US	22 kW	240 V	25 kW	25 kW	97.0%	350–750 V	Nov 12, 2024	SB
GW28KLV-SMT-US	28 kW	208 V	28.2 kW	28.2 kW	97.0%	350–750 V	Nov 12, 2024	SB
GW28KLV-SMT-US	28 kW	240 V	32.1 kW	32.1 kW	97.0%	350–750 V	Nov 12, 2024	SB

DC input (PV side)

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

CEC test DC voltages (min / nom / max)350 / 450 / 750 V
DC input at rated output (CEC test)33.3 kW

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)5.23 W
Power to start converting64.9 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.)Yes — CSA Group, certificate Jan 26, 2024
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 Nov 12, 2024)
CEC listedNov 12, 2024
Last CEC updateOct 13, 2025

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

GW28KLV-SMT-US: max DC 750 V · MPPT 350–750 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	12–15	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	12–15	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	14–19	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	14–19	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	13–18	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	13–18	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	13–18	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	13–18	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	8–10	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	14–19	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	13–18	—
Tesla TSP-420	420 W	43.4 V	27.7 V	13–17	—

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 28 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 GWxxKLV-SMT-US	22 kW–28 kW	97.0%	350–750 V	Yes	2024	0
Solis (Ginlong Technologies) S6-GC30K-LV-US	30 kW–30 kW	97.0%	340–680 V	Yes	2025	—

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

GEPx.x-1-US30GW11K4-MS-US30GWxxK-SMT-USGWxxxx-MS-US30GWxxxxA-MS

Questions & answers

How efficient is the GoodWe GWxxKLV-SMT-US?

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

What sizes does the GoodWe GWxxKLV-SMT-US come in?

The CEC list includes 4 models from 22 kW to 28 kW AC: GW22KLV-SMT-US, GW22KLV-SMT-US, GW28KLV-SMT-US, GW28KLV-SMT-US.

Is the GoodWe GWxxKLV-SMT-US certified to UL 1741 SB?

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

What is the GW28KLV-SMT-US’s DC input voltage range?

CEC tested it at 350–750 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).