Home batteries

Alpha ESS SMILE-G3-BAT

Name: Alpha ESS SMILE-G3-BAT
Brand: Alpha ESS

3.8–57.5 kWh usable · 3 versions · best for big homes and EVs: expands past 40 kWh

9.8Excellent#2 of 28 battery series we rank · EnergyUpgrade Score out of 10

Why it scores 9.8.

Rated on SMILE-G3-BAT-9.3S, its best home version. Each part comes from the datasheet with a published rule; anything not stated scores zero.

Warranty that lasts
10.0 · 30%
Battery warranties end at 10 years or when a set amount of energy has passed through, whichever comes first. This is how many years the warranty covers for a typical home, which cycles its battery about 300 times a year.
Rule: Years of performance warranty at 300 full cycles a year, from the manufacturer's Australian warranty document: 6 years scores 0, the full 10 years or more scores 10.
Weather sealing
9.0 · 25%
Outdoor-rated batteries can go on any wall, including in the weather.
Rule: IP66 or better scores 10, IP65 9, IP55 6, IP54 4, lower 0.
Room to grow
10.0 · 25%
Start with what you need and add modules later, for an EV or electric heating.
Rule: Largest approved configuration, usable kWh: 10 scores 0, 40 or more scores 10.
Heat tolerance
10.0 · 20%
Batteries in garages and on west walls get hot. Higher operating limits mean less throttling.
Rule: Highest operating temperature: 40°C scores 0, 55°C or more scores 10.

For SMILE-G3-BAT-9.3S, the version we rate. 13 approved models · Australian datasheet

Usable capacity: 9.3–55.8 kWh usable
Per module: 9.3 kWh
Performance warranty: 10 years, 70% capacity retained
Warranted throughput: 3,120 kWh per kWh of usable capacity
Warranty at 300 cycles a year: 10.0 years
Depth of discharge: 100%
Chemistry: LFP
IP rating: IP65
Highest operating temperature: 60°C
Expansion: 1 ~ 4 modules in series; capacity range 9.3 ~ 37.2 kWh (100% DoD)
Compatible inverters: SMILE-G3-S5-INV / SMILE-G3-B5-INV
Warranty (as printed): 10 Years Product Warranty, 10 Years Battery Performance Warranty
Weight: 81 kg

Same series in different sizes, finishes or generations. Check which version is on your quote.

SMILE-G3-BAT-9.3S
9.3–55.8 kWh usable · the version we rate
9.8
Warranty: 10.0 yrsCycles: 3,120Works up to: 60°C Datasheet
SMILE-G3-BAT-10.1P
9.6–57.5 kWh usable
9.1
Warranty: 10.0 yrsCycles: 3,120Works up to: 50°C Datasheet
SMILE-G3-BAT-4.0S
3.8 kWh usable
7.3
Warranty: 10.0 yrsCycles: 3,120Works up to: 60°C Datasheet