SMA STPS60US-20

Name: SMA STPS60US-20
Brand: SMA

Battery inverter, ac-coupled battery inverter. 2 models, 27 kW–60 kW AC at 208 V / 480 V.

UL 1741 SBCEC listed · Jul 11, 2024

Model

Rated AC power60 kW
CEC weighted efficiency98.0%

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
STPS27US-20	27 kW	208 V	27 kW	27 kW	95.5%	200–980 V	Jul 11, 2024	SB
STPS60US-20	60 kW	480 V	60 kW	60 kW	98.0%	415–980 V	Jul 11, 2024	SB

Efficiency

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

CEC weighted efficiency98.0%
Night-time standby (tare)17.33 W
Power to start converting178.4 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 — UL, certificate Feb 23, 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 listedJul 11, 2024

UL 1741 SB is required for new interconnections in California (Rule 21) since 2026.

Compare with similar 60 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 STPSxxUS-20	27 kW–60 kW	98.0%	415–980 V	Yes	2024	0
SMA SIxx-US480-20	60 kW–60 kW	98.0%	415–980 V	Yes	2026	—
Kehua BCSxxK-B-HM-US X2	75 kW–175 kW	98.5%	720–1,450 V	Yes	2024	—
Growatt WIT xxK-A-US	50 kW–100 kW	99.0%	750–900 V	Yes	2024	—
Growatt WIT xxK-AU-US	50 kW–100 kW	99.0%	750–900 V	Yes	2024	—

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

SIxx-US208-20SIxx-US480-20

Questions & answers

How efficient is the SMA STPSxxUS-20?

The California Energy Commission lists a weighted efficiency of 95.5–98.0% for SMA STPSxxUS-20 models, measured at six power levels and three DC voltages.

What sizes does the SMA STPSxxUS-20 come in?

The CEC list includes 2 models from 27 kW to 60 kW AC: STPS27US-20, STPS60US-20.

Is the SMA STPSxxUS-20 certified to UL 1741 SB?

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

Can the SMA STPSxxUS-20 be used with a battery?

The CEC lists it as a ac-coupled battery inverter.

What is the STPS60US-20’s DC input voltage range?

CEC tested it at 415–980 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).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.