APsystems (Altenergy Power System) APstoragexK-5-1P-NA

Name: APsystems (Altenergy Power System) APstoragexK-5-1P-NA
Brand: APsystems (Altenergy Power System)

5.8 kWh · 5 kW · Lithium Ion

UL 9540CEC listed · Aug 11, 2022

Overview

CEC Energy Storage System List

APstoragexK-5-1P-NA: 5.8 kWh nameplate energy; 5 kW continuous; lithium ion.

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

CEC Energy Storage System List

Battery	Energy	Continuous power	Chemistry	Warranty	SoCal permits
Enphase Energy IQ Battery 5P	5 kWh	3.33–3.84 kW	Lithium Iron Phosphate	15 years	788
Fortress Power eFlex	5.4 kWh	5 kW	Lithium Iron Phosphate	—	—
Villara Energy Systems VillaGrid	5.8 kWh	8 kW	Lithium Titanate Oxide	20 years	—
Villara Energy Systems VillaGrid	5.8 kWh	8 kW	Lithium Titanate Oxide	20 years	—
Shanghai PYTES Energy E-BOX-48100R	5.1 kWh	2.56 kW	Lithium Ion	10 years	1
APsystems (Altenergy Power System) APbattery	5.2 kWh	5 kW	Lithium Iron Phosphate	—	—

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

How much energy does the APsystems (Altenergy Power System) APstoragexK-5-1P-NA store?

5.8 kWh nameplate, per the California Energy Commission list.

Is the APstoragexK-5-1P-NA UL 9540 certified?

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

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).