Cali-Graf in Southern California

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279.6–579.1 kWh

Commercial energy storage systemCPS (Chint Power Systems)

CPS (Chint Power Systems) CPS ES-xxxkW/xxxkWh

279.6–579.1 kWh · 125–250 kW · Lithium Iron Phosphate · 2 configurations

UL 9540UL 1741 SBCEC listed · May 21, 2024

Nameplate energy279.6–579.1 kWh
Continuous power125–250 kW
ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

CPS ES-xxxkW/xxxkWh: 279.6–579.1 kWh nameplate energy; 125–250 kW continuous; lithium iron phosphate.

Models & configurations

CEC Energy Storage System List · 2 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
CPS ES-125kW/279.55kWh	279.6 kWh	125 kW	480 V	—	May 21, 2024
CPS ES-250kW/559.1kWh	579.1 kWh	250 kW	480 V	—	May 21, 2024

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)279.6–579.1 kWh
Rated power (CEC)125–250 kW
Max continuous discharge (CEC)125–250 kW
Full-power discharge timeabout 2.3 h at full power
ChemistryLithium Iron Phosphate
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by Intertek
Certificate date & editionMay 9, 2024 · 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
Monitor Key Data schedulingYes

Questions & answers

How much energy does the CPS (Chint Power Systems) CPS ES-xxxkW/xxxkWh store?

279.6–579.1 kWh nameplate, per the California Energy Commission list.

Is the CPS ES-xxxkW/xxxkWh UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by intertek).

Sources

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