Inverters

Sigenergy SigenStor

Name: Sigenergy SigenStor
Brand: Sigenergy

5–30 kW · best for solar, battery and backup in one system

9.4Excellent#3 of 59 inverter series we rank · EnergyUpgrade Score out of 10

4.9 out of 5 from 1,395 owner reviews of Sigenergy inverters

ACCC recall: SigenStor EC 8.0/10.0/12.0 kW SP AU energy controllers: replacement in rollout

Type: All-in-one
Phase: Single phase
Efficiency: 98.4%

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Why it scores 9.4.

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

How we rate inverters

Efficiency
8.0 · 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
10.0 · 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.

1906 approved models · Australian datasheet

Sizes: 5–30 kW
Type: All-in-one
Phase: Single phase
Takes a battery: Yes
Maximum efficiency: 98.4%
European weighted efficiency: 98%
Panel headroom (max PV ÷ rated AC): 200%
MPPT trackers: 4
Backup output: 8000 W nominal / 8800 VA max (peak 12000 W for 10 seconds)
IP rating: IP66
Highest operating temperature: 60°C
Cooling: Smart air cooling
Weight: 36 kg
Compatible batteries: SigenStor BAT 5.0 / 8.0, 1 ~ 6 modules per controller

About the brand

Sigenergy inverters

Excellent, modern hardware that installers rate highly. It's a young company and had a recall in 2025, handled with replacements, so the track record is still building.

Read the Sigenergy review

7.5

Brand rating#4 of 9 brands for inverters