South Australian Solar Rebates & Incentives Explained (2025)

If you've been quoted for solar in Adelaide, you've almost certainly been told about 'government rebates.' Most quotes bundle the rebate into the price without explaining what it actually is. Here's a plain-English breakdown of what's available in South Australia right now.

Small-scale Technology Certificates (STCs)

STCs are the main federal incentive for solar installations under 100kW. When your system is installed, it generates a number of certificates based on its size and your location. These certificates have a market value, typically between $30–$40 each, and your installer claims them on your behalf, reducing the upfront cost.

A typical 10kW Adelaide system generates around 100 STCs, worth approximately $3,500–$4,000 off the install price. This is already factored into every quote you receive, a reputable installer should show you the STC credit as a line item.

STCs step down annually toward 2030 as part of the federal phase-out. The sooner you install, the larger the incentive.

SA Home Battery Scheme

The South Australian government's Home Battery Scheme provides subsidised loans and rebates for battery storage. Eligibility and rebate amounts change periodically, check the SA Government website for current figures. In general, the scheme has made battery payback periods significantly shorter for Adelaide homeowners.

Note: some battery brands and installers are approved under the scheme and others are not. Always confirm your installer is approved before committing.

Virtual Power Plants (VPPs)

Several SA energy retailers offer VPP programs that pay you to export battery power during grid stress events. SA Power Networks has also run grid trials. These programs can add meaningful value to a battery investment, but terms vary widely, read the fine print before signing up.

What to watch out for

Inflated 'before rebate' pricing is the oldest trick in the solar sales playbook. A company that shows you a $25,000 system 'reduced to $12,000 with rebates' is almost certainly inflating the anchor price. Get at least three quotes and ask each company to show the STC credit as a separate line item.

Exaggerated savings projections are also common. Your actual savings depend on your tariff structure, how much power you use during the day versus at night, and your system's real-world output, not a generic estimate. Ask for modelling based on your actual bills.

At Next Generation Solar, every ROI projection is built on your actual usage data and current SA tariffs. You receive it in writing before you sign anything.