Inverters

Sungrow SG-RT

Name: Sungrow SG-RT
Brand: Sungrow

5–20 kW · 2 versions · best for three phase solar without a battery

8.3Very good#28 of 59 inverter series we rank · EnergyUpgrade Score out of 10

4.8 out of 5 from 5,411 owner reviews of Sungrow inverters

Type: Solar only
Phase: Three phase
Efficiency: 98.5%

Get quotes for this Datasheet Manufacturer's copy

Why it scores 8.3.

Rated on SG-RT 15–20 kW, its best home version. Each part comes from the datasheet with a published rule; anything not stated scores zero.

How we rate inverters

Efficiency
8.3 · 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
5.0 · 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
9.0 · 15%
Most Australian inverters live outdoors.
Rule: IP66 or better scores 10, IP65 9, IP55 4, lower 0.

Full specifications.

For SG-RT 15–20 kW, the version we rate. 12 approved models · Australian datasheet

Sizes: 15–20 kW
Type: Solar only
Phase: Three phase
Takes a battery: No, solar only
Maximum efficiency: 98.5%
European weighted efficiency: 98.1%
Panel headroom (max PV ÷ rated AC): 150%
MPPT trackers: 2
IP rating: IP65
Highest operating temperature: 60°C
Cooling: Smart forced air cooling
Weight: 21 kg

Every version (2).

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

SG-RT 15–20 kW
15–20 kW · the version we rate
8.3
Type: Solar onlyPhase: Three phaseEfficiency: 98.5% Datasheet
SG-RT 5–10 kW
5–10 kW
8.3
Type: Solar onlyPhase: Three phaseEfficiency: 98.5% Datasheet

About the brand

Sungrow inverters

Our top-rated inverter brand, and the one installers most often pick for their own homes. Proven, efficient and backed by the biggest support network in Australia, with no recalls.

Read the Sungrow review

9.2

Brand rating#1 of 9 brands for inverters