Cali-Graf in Southern California

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5.1 kWh

Battery moduleAltGrid Power

AltGrid Power VBxxxxV

5.1 kWh · 5.12 kW · Lithium Iron Phosphate

UL 1973CEC listed · Jan 2, 2024

Nameplate energy5.1 kWh
Continuous power5.12 kW
ChemistryLithium Iron Phosphate

Overview

CEC Battery List

VBxxxxV: 5.1 kWh nameplate energy; 5.12 kW continuous; lithium iron phosphate.

Capacity & power

CEC Battery List

Nameplate energy (CEC)5.1 kWh
Max continuous discharge (CEC)5.12 kW
Full-power discharge timeabout 1 h at full power
ChemistryLithium Iron Phosphate

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation

City	December	June
Los Angeles	1.6 kW	0.9 kW
Palmdale	1.5 kW	0.9 kW
Chula Vista	1.4 kW	1 kW
Huntington Beach	1.5 kW	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).

Safety listings

CEC Battery List

UL 1973 (stationary battery)Certified by UL
Certificate date & editionSep 11, 2023 · Ed. 3 : 2022

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
APsystems (Altenergy Power System) APbattery	5.2 kWh	5 kW	Lithium Iron Phosphate	—	—
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	—

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

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.
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).