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SMA's Sunny Boy is the German-built string inverter that helped define the residential solar inverter category. SMA was one of the first inverter manufacturers to enter Australia, in 2006, and has a long local field track record.
Parsed from the manufacturer datasheet, install manual, and warranty document. Confirm against the linked PDFs before relying on a value for a quote or installation.
Rated Power
20 kW
Max Efficiency
—
Phases
Three Phase
Max Input Voltage
—
Min Input Voltage
—
Max Input Current
—
Output Voltage
—
Max Output Current
—
Country of Origin
Unknown
Series
Sunny Tripower X
European Efficiency
98.2%
Warranty
5 years
Weight
35 kg
Dimensions
0 x 0 x 0 mm
IP Rating
IP65
Operating Temp
-25°C to 60°C
Cooling
Natural
Battery Compatible
No
Backup Capable
No
ESM Compliant
No
Black Start
No
Grid Forming
No
Export Limiting
No
Remote Monitoring
No
CEC Approved
6 Aug 2026
Approval Expiry
6 Feb 2027
Status
Active
Eligible for Rebates
Yes
Years in AU Market
20 years
Australian Office
Yes
CEC-Approved Batteries
1
CEC-Approved Panels
0
Category
Mid-Tier
$4,000–$8,000
Perth installed price estimate · medium confidence
Prices vary by installer, configuration, and site complexity. Get exact quotes via our installer matching.
From May 1, 2026, all new battery installations in WA require CSIP-AUS compliant inverters. Verify ESM status with your installer.
Perth's high ambient temperatures (regularly 35°C+) can reduce inverter efficiency and trigger thermal throttling. For installations in direct sun or non-ventilated garages, consider inverters with active cooling and wide operating temperature ranges. All grid-connected installations require Western Power approval. Systems above 5kVA require ESM compliance under WA regulations.
Compare this inverter with batteries for a complete system analysis
Australian office
Has local presence
Website
www.sma-australia.com.auThe SMA Australia Pty Ltd STP 20-50 (AS4777-2 2020) against the closest-power inverters from other brands.
| Specification | SMA Australia Pty Ltd STP 20-50 (AS4777-2 2020)SMA Australia Pty Ltd | Afore New Energy Technology (shanghai) Co Ltd AF20K-TH (AS4777-2 2020)Afore New Energy Technology (shanghai) Co Ltd | |
|---|---|---|---|
| Rated power? | 20 kW | 20 kW | 20 kW |
| Max efficiency? | 0.0% | 0.0% | 0.0% |
| MPPT trackers? | Not verified | Not verified | Not verified |
| Phases | Three-phase | Three-phase | Three-phase |
| Type | Solar | Hybrid | Solar |
| Battery ready | No | Yes | No |
| Warranty | 5 years | Not verified | Not verified |
Specs from the CEC register and datasheet enrichment. Indicative — confirm exact figures with your installer.
This warranty covers the Sunny Tripower X solar inverters for five years, ensuring they function correctly. Exclusions include non-accredited installations and modifications; to claim, contact the installer directly.
AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.
From the install manual
Showing 13 of 13. The official install manual is the authoritative source — always confirm before acting.
1001criticalCall your installerL/N swapped - Installation fault.
101criticalCall your installerGrid incident - Voltage too high.
102criticalCall your installerGrid incident - Voltage too high.
103criticalCall your installerGrid incident - Voltage too high.
105criticalCall your installerGrid incident - Voltage too high.
1101criticalCall your installerInstallation fault - Check connection.
301criticalCall your installerVoltage too high.
401criticalCall your installerGrid incident - Disconnected.
404criticalCall your installerGrid incident - Disconnected.
501criticalCall your installerGrid frequency not permitted.
302warningCall your installerTemperature AC voltage - Reduced power.
507warningCall your installerToo high grid frequency - Reduced power.
6001warningCall your installerExcess direct current detected.
Part of the SMA Australia Pty Ltd Sunny Tripower X series
Compare every SMA Australia Pty Ltd Sunny Tripower X variant side by side →
SB1.5-1VL-40 (AS4777-2 2020)
1.5 kW · 1φ
SB2.5-1VL-40 (AS4777-2 2020)
2.5 kW · 1φ
SB3.0-1AV-41 (AS4777-2 2020)
3 kW · 1φ
SB4.0-1AV-41 (AS4777-2 2020)
4 kW · 1φ
SB5.0-1AV-41 (AS4777-2 2020)
5 kW · 1φ
SB6.0-1AV-41 (AS4777-2 2020)
6 kW · 1φ
Other CEC-approved products from SMA Australia Pty Ltd available in Australia.
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About this data
All inverter specifications are sourced from the CEC Approved Products Register. Specifications are provided as published by the CEC and may differ from manufacturer datasheets. Verify current specifications with the manufacturer or your installer before purchasing. Not all listed models may be currently available in Western Australia.