APsystems (Altenergy Power System) APbattery

5.8 kWh · 5 kW · Lithium Iron Phosphate

UL 1973CEC listed · Jul 11, 2023

Usable energy5.2 kWh
Continuous power5 kW
ChemistryLithium Iron Phosphate

Overview

CEC Battery List

APbattery: 5.2 kWh usable energy; 5 kW continuous; lithium iron phosphate.

Capacity & power

CEC Battery List

Nameplate energy (CEC)5.8 kWh
Total energy (datasheet)5.8 kWh
Usable energy5.2 kWh
Depth of discharge90%
Max continuous discharge (CEC)5 kW
Full-power discharge timeabout 1 h at full power
ChemistryLithium Iron Phosphate
Battery voltage (DC, nominal)48 V
Battery voltage range (DC)39–54 V

How long can it power your home?

Cali-Graf calculation

Average home load	Runtime from full
0.5 kW	≈ 10.4 h
1 kW	≈ 5.2 h
2 kW	≈ 2.6 h
3 kW	≈ 1.7 h
5 kW (full continuous power)	≈ 1 h

Runtime = 5.2 kWh usable (datasheet) ÷ load. A typical home averages 1–2 kW; air conditioning and EV charging use much more. Inverter and wiring losses shorten it.

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation

City	December	June
Los Angeles	1.6 kW	1 kW
Palmdale	1.5 kW	0.9 kW
Chula Vista	1.4 kW	1 kW
Huntington Beach	1.5 kW	1.1 kW
Riverside	1.5 kW	0.9 kW
Santa Clarita	1.5 kW	0.9 kW

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).

Installation & environment

CEC Battery List · APsystems (Altenergy Power System) datasheet

Installation locationindoor/outdoor
Ingress protectionIP65
Operating temperature−10 to 45 °C
Weight per kWh1 kWh

Safety listings

CEC Battery List

UL 1973 (stationary battery)Certified by UL
Certificate date & editionFeb 2, 2022 · Ed. 2 : 2018
Other standards on datasheetUL 1973

Full specifications

CEC Battery List · APsystems (Altenergy Power System) datasheet

Communicationrs485, can
Manufacturer websiteapsystems.com

Compare with similar batteries

CEC Energy Storage System List

Battery	Energy	Continuous power	Chemistry	Warranty	SoCal permits
Shanghai PYTES Energy E-BOX-48100R	5.1 kWh	2.56 kW	Lithium Ion	10 years	1
MANGO POWER TECH M Battery xkWh	5 kWh	5.12 kW	Lithium Ion	10 years	—
StackRack Battery Systems SRxK-UL	5.1 kWh	2.56 kW	Lithium Iron Phosphate	10 years	—
Storz Power SPx.xx-LFPv4	5.1 kWh	5.12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics EG4-LL	5.1 kWh	5.12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics EG4 LIFEPOWER4	5.1 kWh	5.12 kW	Lithium Iron Phosphate	10 years	—

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

Documents

manufacturer documents

PDF
APbattery-48V5.76kWh Datasheet REV1.2 2023-06-20
Datasheet · Aug 2023

Questions & answers

How much energy does the APsystems (Altenergy Power System) APbattery store?

5.2 kWh usable, per the manufacturer datasheet.

How long can the APbattery power a home?

About 5.2 hours at an average 1 kW load from a full charge (5.2 kWh usable); higher loads shorten it.

Can the APbattery be installed outdoors?

Installation location per the datasheet: indoor/outdoor.

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
California Energy Commission — Battery List, data as of Oct 7, 2026.
APsystems (Altenergy Power System) — datasheet APbattery-48V5.76kWh Datasheet REV1.2 2023-06-20.
APsystems (Altenergy Power System) — document library on the manufacturer’s website (links above).
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).