Shenzhen Kstar New Energy E12KD

Name: Shenzhen Kstar New Energy E12KD
Brand: Shenzhen Kstar New Energy

Hybrid inverter, dc-coupled hybrid (pv + battery). 4 models, 8 kW–15 kW AC at 240 V.

UL 1741 SBCEC listed · Dec 11, 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 · 4 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
E8KD	8 kW	240 V	8.02 kW	8.02 kW	97.5%	200–400 V	Dec 11, 2024	SB
E10KD	10 kW	240 V	10 kW	10 kW	97.5%	240–400 V	Dec 11, 2024	SB
E12KD	12 kW	240 V	12 kW	12 kW	97.0%	200–400 V	Dec 11, 2024	SB
E15KD	15 kW	240 V	15 kW	15 kW	97.0%	240–400 V	Dec 11, 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)200 / 300 / 400 V
DC input at rated output (CEC test)12.5 kW

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)20.79 W
Power to start converting40.2 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 May 16, 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)Yes (attested Dec 11, 2024)
CEC listedDec 11, 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

E12KD: max DC 400 V · MPPT 200–400 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	7–8	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	7–8	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	8–10	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	8–10	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	8–9	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	8–9	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	8–9	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	8–9	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	5–5	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	8–10	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	8–9	—
Tesla TSP-420	420 W	43.4 V	27.7 V	8–9	—

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 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
Shenzhen Kstar New Energy ExxKD	8 kW–15 kW	97.0%	200–400 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 Shenzhen Kstar New Energy ExxKD?

The California Energy Commission lists a weighted efficiency of 97.0–97.5% for Shenzhen Kstar New Energy ExxKD models, measured at six power levels and three DC voltages.

What sizes does the Shenzhen Kstar New Energy ExxKD come in?

The CEC list includes 4 models from 8 kW to 15 kW AC: E8KD, E10KD, E12KD, E15KD.

Is the Shenzhen Kstar New Energy ExxKD certified to UL 1741 SB?

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

Can the Shenzhen Kstar New Energy ExxKD be used with a battery?

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

What is the E12KD’s DC input voltage range?

CEC tested it at 200–400 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).