Fortress Power eForce DC energy storage system-xx.xP2-2

Name: Fortress Power eForce DC energy storage system-xx.xP2-2
Brand: Fortress Power

38.4 kWh · 24 kW · Lithium Iron Phosphate

UL 9540CEC listed · Apr 11, 2025

Overview

CEC Energy Storage System List

eForce DC energy storage system-xx.xP2-2: 38.4 kWh nameplate energy; 24 kW continuous; lithium iron phosphate.

CEC Energy Storage System List

NLR PVWatts v8 · Cali-Graf calculation · CEC Energy Storage System List

Solar array size that refills the battery from empty in one average day, before the home uses any of it (NLR PVWatts v8, 20° south roof).

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.

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)Yes
JA12 control strategiesFP-ENVY-8K - Basic, TOU, Advanced DR FP-ENVY-10K - Basic, TOU, Advanced DR FP-ENVY-12K - Basic, TOU, Advanced DR
Last CEC updateJun 23, 2025
Monitor Key Data schedulingNo

CEC Energy Storage System List

Battery	Energy	Continuous power	Chemistry	Warranty	SoCal permits
EG4 Electronics PP-16/280A2-18K1-AWLL	28.6 kWh	10.4–12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-16/280A2-18K2-AWLL	28.7 kWh	20.8–24 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-100A16-18K1-LP	30.7 kWh	10.4–12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-100A16-18K1-LL	30.7 kWh	10.4–12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-16/280A3-18K1-AWLL	43 kWh	10.4–12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-16/280A3-18K2-AWLL	43 kWh	20.8–24 kW	Lithium Iron Phosphate	10 years	—

Same segment, similar capacity; each row from the same sources.

How much energy does the Fortress Power eForce DC energy storage system-xx.xP2-2 store?

38.4 kWh nameplate, per the California Energy Commission list.

Is the eForce DC energy storage system-xx.xP2-2 UL 9540 certified?

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

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).