Inverters

Tesla Powerwall 3

5–11.04 kW · best for solar, battery and backup in one system

7.2Good#49 of 59 inverter series we rank · EnergyUpgrade Score out of 10

Type: All-in-one
Phase: Single phase
Efficiency: 97.5%

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Why it scores 7.2.

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

How we rate inverters

Efficiency
5.0 · 30%
Every point of efficiency is solar you keep, every day for 10+ years.
Rule: Maximum efficiency on the datasheet: 96% scores 0, 99% scores 10.
MPPTs for split roofs
10.0 · 20%
Each MPPT runs one roof face independently, so east and west panels don't drag each other down.
Rule: Number of MPPT trackers: 1 scores 0, 2 scores 5, 3 or more scores 10.
Heat tolerance
3.3 · 20%
Inverters on hot walls throttle or fail early. A higher operating limit means more headroom.
Rule: Highest operating temperature: 45°C scores 0, 60°C scores 10.
Room for more panels
10.0 · 15%
How much panel capacity the inverter accepts, so you can oversize for winter and cloudy days.
Rule: Maximum PV input divided by rated AC output: 1.2x scores 0, 1.5x or more scores 10. Rebate rules allow panels up to 133% of the inverter, so more than 150% adds little.
Weather sealing
10.0 · 15%
Most Australian inverters live outdoors.
Rule: IP66 or better scores 10, IP65 9, IP55 4, lower 0.

Full specifications.

13 approved models · Australian datasheet

Sizes: 5–11.04 kW
Type: All-in-one
Phase: Single phase
Takes a battery: Yes
Maximum efficiency: 97.5%
Panel headroom (max PV ÷ rated AC): 181%
MPPT trackers: 3
Backup output: 11.04 kW (whole home backup via Backup Gateway 2)
IP rating: IP67
Highest operating temperature: 50°C
Weight: 130 kg
Warranty (as printed): 10 years
Compatible batteries: Powerwall 3 Expansion (1807000-xx-y), 13.5 kWh, up to 3 units

About the brand

Tesla inverters

Powerwall 3's built-in inverter does the job well and keeps everything in one box. As an inverter alone it's middle of the pack; its strength is the complete battery system.

Read the Tesla review

6.6

Brand rating#7 of 9 brands for inverters