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279.5 kWh

Commercial energy storage systemDelta Electronics

Delta Electronics AIOBxxxK125L

279.5 kWh · 139.6 kW · Lithium Ion

UL 9540CEC listed · Oct 1, 2026

Nameplate energy279.5 kWh
Continuous power139.6 kW
ChemistryLithium Ion

Overview

CEC Energy Storage System List

AIOBxxxK125L: 279.5 kWh nameplate energy; 139.6 kW continuous; lithium ion.

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)279.5 kWh
Rated power (CEC)139.6 kW
Max continuous discharge (CEC)139.6 kW
Full-power discharge timeabout 2 h at full power
ChemistryLithium Ion

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by TUV Rheinland of North America
Certificate date & editionApr 28, 2026 · Ed. 3 : 2025

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

Questions & answers

How much energy does the Delta Electronics AIOBxxxK125L store?

279.5 kWh nameplate, per the California Energy Commission list.

Is the AIOBxxxK125L 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.