Illustration

Hybrid inverterRCT Power

RCT Power Power Storage DC US-15.0

Name: RCT Power Power Storage DC US-15.0
Brand: RCT Power

Hybrid inverter, dc-coupled hybrid (pv + battery). 4 models, 7 kW–15 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · May 11, 2022

Model

Rated AC power15 kW
CEC weighted efficiency95.5%

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
Power Storage DC US-8.0	7 kW	208 V	7.01 kW	7.01 kW	97.0%	220–420 V	May 11, 2022	SB
Power Storage DC US-8.0	8 kW	240 V	8.03 kW	8.03 kW	97.0%	220–420 V	May 11, 2022	SB
Power Storage DC US-15.0	15 kW	208 V	14.9 kW	14.9 kW	95.5%	220–440 V	Jul 1, 2025	SB
Power Storage DC US-15.0	15 kW	240 V	14.9 kW	14.9 kW	95.5%	220–440 V	Jul 1, 2025	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)220 / 380 / 440 V
DC input at rated output (CEC test)15.6 kW

Efficiency

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

CEC weighted efficiency95.5%
Night-time standby (tare)16.1 W
Power to start converting89.4 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 Apr 19, 2025
UL 1741 SA (SA8–SA13)8 of 12 models — CSA Group
Firmware tested (SA)V54
Volt-VAr with reactive power priority (SA13)8 of 12 models
Freq-Watt / Volt-Watt (SA14–15)8 of 12 models
Disable permit service / limit active power (SA17–18)8 of 12 models
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*) (8 of 12 models)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Jul 1, 2025)
Power control system (PCS)Stated in CEC listing (power control system)
CEC listedMay 11, 2022
Last CEC updateAug 1, 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

Power Storage DC US-15.0: max DC 440 V · MPPT 220–440 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	9–11	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	9–11	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	9–10	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	8–10	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	8–10	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	8–10	—
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	9–11	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	8–10	—
Tesla TSP-420	420 W	43.4 V	27.7 V	8–10	—

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 15 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
RCT Power Power Storage DC US	7 kW–15 kW	95.5%	220–440 V	Yes	2025	0
EG4 Electronics 18KPV-12LV	10.4 kW–12 kW	97.0%	230–480 V	Yes	2023	7
Shenzhen Lux Power Technology LXP-LB-US xK	8 kW–16 kW	97.0%	210–480 V	Yes	2025	1
Sol-Ark 12K-2P-LL	12 kW–12 kW	97.5%	250–425 V	Yes	2026	—
Suzhou Ample ESS AP-LxK-SPUS	7.98 kW–15 kW	96.5%	108–480 V	Yes	2026	—

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

About RCT Power

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerRCT Power
Listed in CEC asJiangsu RCT Power Energy Technology Co., Ltd, RCT Power Energy Technology Corporation
Models on CEC lists124

Other series

Power Storage DC US-8.0 PRO

Questions & answers

How efficient is the RCT Power Power Storage DC US?

The California Energy Commission lists a weighted efficiency of 95.5–97.0% for RCT Power Power Storage DC US models, measured at six power levels and three DC voltages.

What sizes does the RCT Power Power Storage DC US come in?

The CEC list includes 4 models from 7 kW to 15 kW AC: Power Storage DC US-8.0, Power Storage DC US-8.0, Power Storage DC US-15.0, Power Storage DC US-15.0.

Is the RCT Power Power Storage DC US certified to UL 1741 SB?

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

Can the RCT Power Power Storage DC US be used with a battery?

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

What is the Power Storage DC US-15.0’s DC input voltage range?

CEC tested it at 220–440 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).