Cali-Graf in Southern California

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932 kWh

Commercial energy storage systemRCT Power

RCT Power CESSxxx-500-02D

932 kWh · 500 kW · Lithium Iron Phosphate

UL 9540UL 1741 SBCEC listed · Jul 11, 2025

Nameplate energy932 kWh
Continuous power500 kW
ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

CESSxxx-500-02D: 932 kWh nameplate energy; 500 kW continuous; lithium iron phosphate.

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)932 kWh
Rated power (CEC)500 kW
Max continuous discharge (CEC)500 kW
Full-power discharge timeabout 1.9 h at full power
ChemistryLithium Iron Phosphate
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by TUV Rheinland of North America
Certificate date & editionMar 12, 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)No
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
Monitor Key Data schedulingYes

Questions & answers

How much energy does the RCT Power CESSxxx-500-02D store?

932 kWh nameplate, per the California Energy Commission list.

Is the CESSxxx-500-02D UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by tuv rheinland of north america).

Sources

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