Trystar OZPCS-RS40-Bxx

Name: Trystar OZPCS-RS40-Bxx
Brand: Trystar

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

CEC listed · Jul 13, 2020

Model

Rated AC power40 kW
CEC weighted efficiency96.5%

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-Bxx	40 kW	208 V	17.5 kW	17.5 kW	93.5%	550–820 V	Jul 13, 2020	—
OZPCS-RS40-Bxx	40 kW	480 V	39.9 kW	39.9 kW	96.5%	550–820 V	Jul 13, 2020	—

Efficiency

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

CEC weighted efficiency96.5%
Night-time standby (tare)1,066.26 W
Power to start converting371.1 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)Rev 6.1.3.0
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)Yes (attested Oct 11, 2021)
CEC listedJul 13, 2020
Last CEC updateApr 2, 2024
CEC noteFormerly Oztek Corp., OZPCS-RS40-Bxx {208V}

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-Bxx	40 kW–40 kW	96.5%	550–820 V	—	2020	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	—
Trystar OZPCS-RS40-BB1	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	—

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-BB1OZPCS-RS40-Fxx

Questions & answers

How efficient is the Trystar OZPCS-RS40-Bxx?

The California Energy Commission lists a weighted efficiency of 93.5–96.5% for Trystar OZPCS-RS40-Bxx models, measured at six power levels and three DC voltages.

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

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

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

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

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

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

What is the OZPCS-RS40-Bxx’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.