Home batteries

Tesla Powerwall 3 AC

Name: Tesla Powerwall 3 AC
Brand: Tesla

13.5–54 kWh usable · best for big homes and EVs: expands past 40 kWh

9.3Excellent#8 of 28 battery series we rank · EnergyUpgrade Score out of 10

4.9 out of 5 from 389 owner reviews of Tesla home batteries

Warranty: 10.0 yrs
Cycles: Unlimited
Works up to: 50°C

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Why it scores 9.3.

Each part comes from the datasheet with a published rule; anything not stated scores zero.

How we rate home batteries

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
10.0 · 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
6.7 · 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.

Full specifications.

4 approved models · Australian datasheet

Usable capacity: 13.5–54 kWh usable
Per module: 13.5 kWh
Performance warranty: 10 years, 70% capacity retained
Warranted throughput: Unlimited cycles for solar self-consumption and backup
Warranty at 300 cycles a year: 10.0 years
Discharge power (as printed): 5 kW
IP rating: IP67
Highest operating temperature: 50°C
Round-trip efficiency (as printed): 89% battery to home/grid (25 C, beginning of life, 3.3 kW charge/discharge)
Expansion: Up to 4 Powerwall 3AC units supported; up to 3 Powerwall 3 Expansion units (maximum total of 7 units); stacking up to (3) Expansion units behind a Powerwall 3AC (floor mount only)
Compatible inverters: Standalone storage or AC-coupled solar (no DC-coupled solar); supported islanding device Backup Gateway 2
Warranty (as printed): 10 years
Installation: Floor or wall mount; indoor and outdoor rated; maximum elevation 2000 m (Expansion 3000 m); operating noise < 50 db(A) typical, < 62 db(A) maximum @ 1 m
Weight: 130 kg

About the brand

Tesla home batteries

Still one of the best home batteries you can buy: a polished all-in-one with whole-home backup, a warranty with no throughput cap for home use, and IP67 sealing. Support is by phone rather than through a dedicated local energy office.

Read the Tesla review

8.1

Brand rating#4 of 9 brands for home batteries