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1,116–2,232 kWh

Commercial energy storage systemPowersmiths International

Powersmiths International SUNSYS HES XL xxxkW 480V UL 4G aa CATL xxxkWH bb ccc

1,116–2,232 kWh · 500 kW · Lithium Ion · 5 configurations

UL 9540UL 1741 SBCEC listed · Jan 3, 2023

Nameplate energy1,116–2,232 kWh
Continuous power500 kW
ChemistryLithium Ion

Overview

CEC Energy Storage System List

SUNSYS HES XL xxxkW 480V UL 4G aa CATL xxxkWH bb ccc: 1,116–2,232 kWh nameplate energy; 500 kW continuous; lithium ion.

Models & configurations

CEC Energy Storage System List · 5 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
SUNSYS HES XL 500kW 480V UL 4G aa CATL 1116kWH bb ccc	1,116 kWh	500 kW	480 V	—	Jan 3, 2023
SUNSYS HES XL 500kW 480V UL 4G aa CATL 1395kWH bb ccc	1,395 kWh	500 kW	480 V	—	Jan 3, 2023
SUNSYS HES XL 500kW 480V UL 4G aa CATL 1674kWH bb ccc	1,674 kWh	500 kW	480 V	—	Jan 3, 2023
SUNSYS HES XL 500kW 480V UL 4G aa CATL 1953kWH bb ccc	1,953 kWh	500 kW	480 V	—	Jan 3, 2023
SUNSYS HES XL 500kW 480V UL 4G aa CATL 2232kWH bb ccc	2,232 kWh	500 kW	480 V	—	Jan 3, 2023

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)1,116–2,232 kWh
Rated power (CEC)500 kW
Max continuous discharge (CEC)500 kW
Full-power discharge timeabout 4.5 h at full power
ChemistryLithium Ion
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by QPS Evaluation Services Inc.
Certificate date & editionOct 4, 2022 · Ed. 2 : 2020

UL 9540 certifies the whole storage system; UL 9540A is the fire-propagation test that fire codes ask for indoors and near walls.

California grid & code compliance

CEC Energy Storage System List

UL 1741 SB (IEEE 1547-2018)Yes
UL 1741 SA (Rule 21)Yes
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
Last CEC updateNov 3, 2025
Monitor Key Data schedulingYes

Questions & answers

How much energy does the Powersmiths International SUNSYS HES XL xxxkW 480V UL 4G aa CATL xxxkWH bb ccc store?

1,116–2,232 kWh nameplate, per the California Energy Commission list.

Is the SUNSYS HES XL xxxkW 480V UL 4G aa CATL xxxkWH bb ccc UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by qps evaluation services inc.).

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.