Cali-Graf in Southern California

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String inverterSMA

SMA SHP 165-US-21

String inverter. 4 models, 125 kW–172 kW AC at 480 V / 600 V / 630 V / 660 V.

UL 1741 SBCEC listed · Mar 21, 2023

Model

Rated AC power165 kW
CEC weighted efficiency99.0%

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
SHP 125-US-21	125 kW	480 V	125 kW	125 kW	98.5%	705–1,200 V	Jul 11, 2023	SB
SHP 150-US-21	150 kW	600 V	150 kW	150 kW	99.0%	880–1,200 V	Mar 21, 2023	SB
SHP 165-US-21	165 kW	630 V	165 kW	165 kW	99.0%	925–1,200 V	Mar 21, 2023	SB
SHP 172-US-21	172 kW	660 V	172 kW	172 kW	99.0%	968–1,200 V	Mar 21, 2023	SB

DC input (PV side)

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

CEC test DC voltages (min / nom / max)925 / 994 / 1,200 V
DC input at rated output (CEC test)167.4 kW

Efficiency

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

CEC weighted efficiency99.0%
Night-time standby (tare)4.16 W
Power to start converting169.7 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 — UL, certificate Nov 30, 2022
UL 1741 SA (SA8–SA13)Yes — UL
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)Yes
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedMar 21, 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

SHP 165-US-21: max DC 1,200 V · MPPT 925–1,200 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	no fit	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	no fit	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	no fit	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	no fit	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	no fit	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	no fit	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	no fit	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	no fit	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	no fit	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	no fit	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	no fit	—
Tesla TSP-420	420 W	43.4 V	27.7 V	no fit	—

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 165 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
SMA SHP xxx-US-21	125 kW–172 kW	99.0%	925–1,200 V	Yes	2023	0
SMA SHP FLEX-US-21	55 kW–172 kW	99.0%	372–1,200 V	Yes	2025	—

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

About SMA

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerSMA
Listed in CEC asSMA America
Websitesma-america.com
Models on CEC lists202

Other series

STP xx-US-80SHP FLEX-US-21STP xx-US-50

Questions & answers

How efficient is the SMA SHP xxx-US-21?

The California Energy Commission lists a weighted efficiency of 98.5–99.0% for SMA SHP xxx-US-21 models, measured at six power levels and three DC voltages.

What sizes does the SMA SHP xxx-US-21 come in?

The CEC list includes 4 models from 125 kW to 172 kW AC: SHP 125-US-21, SHP 150-US-21, SHP 165-US-21, SHP 172-US-21.

Is the SMA SHP xxx-US-21 certified to UL 1741 SB?

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

What is the SHP 165-US-21’s DC input voltage range?

CEC tested it at 925–1,200 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).