Illustration

Hybrid inverterGreen Solutions (Chengdu)

Green Solutions (Chengdu) H12K-US

Name: Green Solutions (Chengdu) H12K-US
Brand: Green Solutions (Chengdu)

Hybrid inverter, dc-coupled hybrid (pv + battery). 2 models, 12 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · May 21, 2024

Model

Rated AC power12 kW
CEC weighted efficiency97.0%

Models & power ratings

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

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
H12K-US	12 kW	208 V	10.5 kW	10.5 kW	96.5%	230–480 V	May 21, 2024	SB
H12K-US	12 kW	240 V	11.9 kW	11.9 kW	97.0%	230–480 V	May 21, 2024	SB

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

DC input (PV side)

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

CEC test DC voltages (min / nom / max)230 / 360 / 480 V
DC input at rated output (CEC test)12.3 kW

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)

UL 1741 SB (3rd ed.)Yes — Intertek, certificate Mar 4, 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) conformanceNo
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedMay 21, 2024

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

H12K-US: 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	—

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

CEC Energy Storage System List

CEC-certified storage systems that include it

System	Energy	Power	Chemistry	CEC listed
Green Solutions Inc. GS-E10P10-H12K-US {208V}	10 kWh	10.4 kW	Lithium Ion	Aug 11, 2023
Green Solutions Inc. GS-E10P10-H12K-US {240V}	10 kWh	12 kW	Lithium Ion	Aug 11, 2023

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
Green Solutions (Chengdu) H12K-US	12 kW–12 kW	97.0%	230–480 V	Yes	2024	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.

Questions & answers

How efficient is the Green Solutions (Chengdu) H12K-US?

The California Energy Commission lists a weighted efficiency of 96.5–97.0% for Green Solutions (Chengdu) H12K-US models, measured at six power levels and three DC voltages.

What sizes does the Green Solutions (Chengdu) H12K-US come in?

The CEC list includes 2 models from 12 kW to 12 kW AC: H12K-US, H12K-US.

Is the Green Solutions (Chengdu) H12K-US certified to UL 1741 SB?

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

Can the Green Solutions (Chengdu) H12K-US be used with a battery?

The CEC lists it as a dc-coupled hybrid (pv + battery). CEC-certified storage systems that include it: Green Solutions Inc. GS-E10P10-H12K-US {208V}, Green Solutions Inc. GS-E10P10-H12K-US {240V}.

What is the H12K-US’s DC input voltage range?

CEC tested it at 230–480 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.
California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
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).