SimpliPhi Power SPHI-IN-6

Hybrid inverter, dc-coupled hybrid (pv + battery). 1 model, 6 kW AC at 120 V.

CEC listed · Nov 13, 2023

Rated AC power6 kW
CEC weighted efficiency93.5%

DC input (PV side)

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

CEC test DC voltages (min / nom / max)250 / 370 / 500 V
DC input at rated output (CEC test)6.36 kW

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power6 kW
CEC-measured continuous output6.02 kW
Grid voltage120 V
Phase120 V

Efficiency

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

CEC weighted efficiency93.5%
Night-time standby (tare)43 W
Power to start converting109.6 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.)No
UL 1741 SA (SA8–SA13)Yes — Intertek
Firmware tested (SA)V01.14
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)No
CSIP (IEEE 2030.5) conformanceNo
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedNov 13, 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

SPHI-IN-6: max DC 500 V · MPPT 250–500 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	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	10–12	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	9–12	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	9–12	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	9–12	—
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	10–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	9–12	—
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 6 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
SimpliPhi Power SPHI-IN	6 kW–6 kW	93.5%	250–500 V	—	2023	0
VOLTRONIC POWER TECHNOLOGY (SHENZHEN) InfiniSolar WP LV xKW	6 kW–15 kW	97.0%	150–500 V	Yes	2026	—
Power Center Essential Hybrid 5	5 kW–8 kW	96.5%	200–425 V	Yes	2024	—
Fengfan Co., Ltd. Power Supply Branch SPT-OMOBFP1-A-xKW	6 kW–6 kW	93.5%	250–500 V	Yes	2024	—
Sol-Ark 5K-120V/8K-230V-1P	5 kW–8 kW	96.5%	200–425 V	Yes	2022	—

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

Questions & answers

How efficient is the SimpliPhi Power SPHI-IN?

The California Energy Commission lists a weighted efficiency of 93.5% for SimpliPhi Power SPHI-IN models, measured at six power levels and three DC voltages.

Is the SimpliPhi Power SPHI-IN certified to UL 1741 SB?

The CEC list does not show UL 1741 SB certification for these models.

Can the SimpliPhi Power SPHI-IN be used with a battery?

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

What is the SPHI-IN-6’s DC input voltage range?

CEC tested it at 250–500 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).