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353–529 kWh

Commercial energy storage systemDelta Electronics

Delta Electronics EIS-UExxxK2H1

353–529 kWh · 125–220 kW · Lithium Ion · 2 configurations

UL 9540CEC listed · Apr 1, 2022

Nameplate energy353–529 kWh
Continuous power125–220 kW
ChemistryLithium Ion

Overview

CEC Energy Storage System List

EIS-UExxxK2H1: 353–529 kWh nameplate energy; 125–220 kW continuous; lithium ion.

Models & configurations

CEC Energy Storage System List · 2 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
EIS-UE125K2H1	353 kWh	125 kW	480 V	—	Apr 1, 2022
EIS-UE220K2H1	529 kWh	220 kW	480 V	—	Apr 1, 2022

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)353–529 kWh
Rated power (CEC)125–220 kW
Max continuous discharge (CEC)125–220 kW
Full-power discharge timeabout 2.4 h at full power
ChemistryLithium Ion
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by TUV Rheinland
Certificate date & editionSep 29, 2021 · 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)No
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 Delta Electronics EIS-UExxxK2H1 store?

353–529 kWh nameplate, per the California Energy Commission list.

Is the EIS-UExxxK2H1 UL 9540 certified?

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

Sources

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