Alpha ESS SMILE-SPBx.x

Name: Alpha ESS SMILE-SPBx.x
Brand: Alpha ESS

8.2–49.2 kWh · 7.6–9.6 kW · Lithium Iron Phosphate · 12 configurations

UL 9540UL 1741 SBCEC listed · Jul 1, 2022

Overview

CEC Energy Storage System List

SMILE-SPBx.x: 8.2–49.2 kWh nameplate energy; 7.6–9.6 kW continuous; lithium iron phosphate.

CEC Energy Storage System List · 12 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
SMILE-SPB7.6 {8.2kWh}	8.2 kWh	7.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB9.6 {8.2kWh}	8.2 kWh	9.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB7.6 {16.4kWh}	16.4 kWh	7.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB9.6 {16.4kWh}	16.4 kWh	9.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB7.6 {24.6kWh}	24.6 kWh	7.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB9.6 {24.6kWh}	24.6 kWh	9.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB7.6 {32.8kWh}	32.8 kWh	7.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB9.6 {32.8kWh}	32.8 kWh	9.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB7.6 {41kWh}	41 kWh	7.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB9.6 {41kWh}	41 kWh	9.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB7.6 {49.2kWh}	49.2 kWh	7.6 kW	240 V	—	Jul 1, 2022
SMILE-SPB9.6 {49.2kWh}	49.2 kWh	9.6 kW	240 V	—	Jul 1, 2022

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
Sol-Ark L3 HVR	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	7
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	—
Power Center Duracell	14–42 kWh	5 kW	Lithium Iron Phosphate	—	—
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 Alpha ESS SMILE-SPBx.x store?

8.2–49.2 kWh nameplate, per the California Energy Commission list.

Is the SMILE-SPBx.x 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).