Cali-GrafCali-Graf
For pros Sign in
81 kWh
Commercial energy storage systemFortress Power

Fortress Power MINI-40-0-xx-480

81 kWh · 40 kW · Lithium Iron Phosphate · direct PV input

UL 9540UL 1741 SBCEC listed · Jul 11, 2024
  • Nameplate energy81 kWh
  • Continuous power40 kW
  • Round trip (AC)80%
  • ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

MINI-40-0-xx-480: 81 kWh nameplate energy; 40 kW continuous; lithium iron phosphate; accepts solar panels directly (DC-coupled).

Capacity & power

CEC Energy Storage System List

Safety listings

CEC Energy Storage System List
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

Questions & answers

How much energy does the Fortress Power MINI-40-0-xx-480 store?

81 kWh nameplate, per the California Energy Commission list.

Is the MINI-40-0-xx-480 UL 9540 certified?

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

Sources

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