Trystar OZPCS-RS40-BB1

Name: Trystar OZPCS-RS40-BB1
Brand: Trystar

Battery inverter, ac-coupled battery inverter. 2 models, 40 kW AC at 208 V / 480 V.

UL 1741 SBCEC listed · Aug 12, 2024

Model

Rated AC power40 kW
CEC weighted efficiency97.0%

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
OZPCS-RS40-BB1	40 kW	208 V	17.2 kW	17.2 kW	94.0%	550–820 V	Aug 12, 2024	SB
OZPCS-RS40-BB1	40 kW	480 V	39.5 kW	39.5 kW	97.0%	550–820 V	Aug 12, 2024	SB

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)25.79 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 — Intertek, certificate Feb 27, 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) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedAug 12, 2024

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

Compare with similar 40 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
Trystar OZPCS-RS40-BB1	40 kW–40 kW	97.0%	550–820 V	Yes	2024	0
Trystar OZPCS-RSxx-FB1	24 kW–40 kW	97.0%	400–820 V	Yes	2025	—
Trystar OZPCS-EP40-000	40 kW–40 kW	97.0%	550–820 V	Yes	2024	—
SMA STPSxxUS-20	27 kW–60 kW	98.0%	200–980 V	Yes	2024	—
Growatt WIT xxK-A-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 Trystar

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerTrystar
Listed in CEC asTrystar, LLC
Models on CEC lists14

Other series

OZPCS-RS35-FB0OZPCS-RSxx-FB1OZPCS-EP40-000OZPCS-RS40-BxxOZPCS-RS40-Fxx

Questions & answers

How efficient is the Trystar OZPCS-RS40-BB1?

The California Energy Commission lists a weighted efficiency of 94.0–97.0% for Trystar OZPCS-RS40-BB1 models, measured at six power levels and three DC voltages.

What sizes does the Trystar OZPCS-RS40-BB1 come in?

The CEC list includes 2 models from 40 kW to 40 kW AC: OZPCS-RS40-BB1, OZPCS-RS40-BB1.

Is the Trystar OZPCS-RS40-BB1 certified to UL 1741 SB?

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

Can the Trystar OZPCS-RS40-BB1 be used with a battery?

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

What is the OZPCS-RS40-BB1’s DC input voltage range?

CEC tested it at 550–820 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.