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289 kWh

Commercial energy storage systemEVO Power USA

EVO Power USA EVO-FLEX-xxxkW/250kWh-480V

289 kWh · 125 kW · Lithium Ion

UL 9540UL 1741 SBCEC listed · Feb 3, 2025

Nameplate energy289 kWh
Continuous power125 kW
ChemistryLithium Ion

Overview

CEC Energy Storage System List

EVO-FLEX-xxxkW/250kWh-480V: 289 kWh nameplate energy; 125 kW continuous; lithium ion.

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)289 kWh
Rated power (CEC)125 kW
Max continuous discharge (CEC)125 kW
Full-power discharge timeabout 2.3 h at full power
ChemistryLithium Ion
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by CSA Group
Certificate date & editionOct 31, 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)Yes
UL 1741 SA (Rule 21)No
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
Last CEC updateJun 1, 2026
Monitor Key Data schedulingYes

Questions & answers

How much energy does the EVO Power USA EVO-FLEX-xxxkW/250kWh-480V store?

289 kWh nameplate, per the California Energy Commission list.

Is the EVO-FLEX-xxxkW/250kWh-480V UL 9540 certified?

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

Sources

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