Cali-Graf in Southern California

For pros Sign in

261 kWh

Commercial energy storage systemCPS (Chint Power Systems)

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

261 kWh · 62.5–125 kW · Lithium Iron Phosphate · 2 configurations

UL 9540UL 1741 SBCEC listed · Jun 23, 2025

Nameplate energy261 kWh
Continuous power62.5–125 kW
Round trip (AC)85–86%
ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

CPS ES-xxxkW/xxxkWh-US: 261 kWh nameplate energy; 62.5–125 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-62.5kW/261kWh-US	261 kWh	62.5 kW	480 V	86%	Jun 23, 2025
CPS ES-125kW/261kWh-US	261 kWh	125 kW	480 V	85%	Jun 23, 2025

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)261 kWh
Rated power (CEC)62.5–125 kW
Max continuous discharge (CEC)62.5–125 kW
Full-power discharge timeabout 2.1 h at full power
Round-trip efficiency (AC-AC)85–86%
ChemistryLithium Iron Phosphate
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by Intertek
Certificate date & editionApr 25, 2025 · Ed. 3 : 2023

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)
Anti-islanding method groupsGroup 1 Anti-Island8, Group 5 Anti-Island8
JA12 declaration (Title 24)Yes
JA12 control strategiesBasic, TOU, Advance DR
Last CEC updateApr 13, 2026
Monitor Key Data schedulingNo

Questions & answers

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

261 kWh nameplate, per the California Energy Commission list.

Is the CPS ES-xxxkW/xxxkWh-US 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.