Cali-Graf in Southern California

For pros Sign in

250 kWh

Commercial energy storage systemRelyEZ Energy Storage Technology

RelyEZ Energy Storage Technology YXYK-xxxK/552314-M

250 kWh · 125 kW · Lithium Iron Phosphate

UL 9540CEC listed · Jun 23, 2025

Nameplate energy250 kWh
Continuous power125 kW
ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

YXYK-xxxK/552314-M: 250 kWh nameplate energy; 125 kW continuous; lithium iron phosphate.

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)250 kWh
Rated power (CEC)125 kW
Max continuous discharge (CEC)125 kW
Full-power discharge timeabout 2 h at full power
ChemistryLithium Iron Phosphate
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by SGS
Certificate date & editionAug 12, 2024 · 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)No
UL 1741 SA (Rule 21)No
CSIP (IEEE 2030.5)No
JA12 declaration (Title 24)No
Monitor Key Data schedulingNo

Questions & answers

How much energy does the RelyEZ Energy Storage Technology YXYK-xxxK/552314-M store?

250 kWh nameplate, per the California Energy Commission list.

Is the YXYK-xxxK/552314-M UL 9540 certified?

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

Sources

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