StackRack Battery Systems SR5K-UL Battery Module / Luxpower 12K

Name: StackRack Battery Systems SR5K-UL Battery Module / Luxpower 12K
Brand: StackRack Battery Systems

61.4 kWh · 12 kW · Lithium Ion · direct PV input · 2 configurations

UL 9540CEC listed · Oct 11, 2023

Overview

CEC Energy Storage System List

SR5K-UL Battery Module / Luxpower 12K: 61.4 kWh nameplate energy; 12 kW continuous; lithium ion; accepts solar panels directly (DC-coupled).

CEC Energy Storage System List · 2 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
SR5K-UL Battery Module / Luxpower 12K {208V}	61.4 kWh	12 kW	208 V	—	Oct 11, 2023
SR5K-UL Battery Module / Luxpower 12K {240V}	61.4 kWh	12 kW	240 V	—	Oct 11, 2023

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

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
Sol-Ark L3 HVR	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	7
Sol-Ark L3 HV-xxKWH-xxK	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	—

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

How much energy does the StackRack Battery Systems SR5K-UL Battery Module / Luxpower 12K store?

61.4 kWh nameplate, per the California Energy Commission list.

Is the SR5K-UL Battery Module / Luxpower 12K UL 9540 certified?

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

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).