Small-Scale Technology Certificates (STC)

The sun is shining on solar, with the Australian Government providing incentives and rebates to encourage homeowners to sign up for solar power.

One of the most established solar rebate schemes is a government incentive called Small-Scale Technology Certificates (STC). STCs are not what you might typically expect from a government rebate. Rather than being cash in hand, STCs are financial incentives that lower the upfront cost of a solar system and are typically handled by your solar provider.

Confused? Allow us to explain.

What are Small-Scale Technology Certificates?

Small-Scale Technology Certificates – commonly known by the acronym STC – are government financial incentives designed to boost the implementation of renewable energy in Australia.

They’re part of the Small-Scale Renewable Energy Scheme, which provides incentives for Aussies to incorporate solar, wind, hydro and other small-scale renewable energy into their homes or businesses.

When you install a solar or solar + battery solution at your home, your installer handles your STC rebates. So while it helps to be aware of how they impact your overall cost, you won’t have to do any of the legwork.

The quote for your solar solution usually includes your STC deduction.

How are STCs calculated?

STC have fluctuating values; you can track their current price here. Their value can be redeemed by selling or assigning them. What you’re really interested in is how many small-scale technology certificates you qualify for. Each property is individually assessed using the calculation below.

Solar system size (kW) x zone rating x deeming period = number of STCs.

Let’s have a look at what solar system size, zone rating and deeming period mean.

Solar system kW

All solar PV systems have a kW capability. For example, Plico’s solar PV system start from 6.6 kW. The size you choose depends on how great your energy needs are and your available roof space.

Zone rating

Zone ratings are based on your geographical location, with postcodes determining which ‘zone’ you fall under. There are four zones, unimaginatively numbered 1 - 4. Zone 1 has the highest rating (1.622) and Zone 4 the lowest (1.185). These ratings are determined by the quantity of solar energy that can be generated in a particular area (e.g. the sunniest areas get the highest ratings).

Have a look at which zone you fall under here. Perth homes are located in Zone 3 and Melbourne homes are located in Zone 4.

Deeming period

The Small-Scale Renewable Energy Scheme has been created to be phased out by 2031. The ‘deeming period’ is the number of remaining years in the scheme. So, for example, in 2023, the deeming period is 8; in 2024, it will be 7; in 2025, 6; and so forth.

How do STCs work?

As we mentioned above, STCs have a fluctuating value, which means they are worth different amounts at different times. This fluctuation allows them to be traded on an open market, although in reality, solar installers usually take ownership of your STCS and deduct the value from your system costs.

Energy companies are required to buy a certain number of STCs per year to meet their renewable energy targets. Taking charge of your STCs helps them meet their targets.

Who can claim STCs?

Households and small businesses that install a renewable energy system, like a solar + battery system, for example, can claim the relevant number of STCs for the installation, although, as we mentioned above, your installer will normally apply for your STCs and then sell them on your behalf.

How do STCs affect Plico customers?

Plico incorporates STCs and the ‘rebate’ into our pricing across our extensive range of solar PV and solar + battery systems. Although STC prices fluctuate, our smaller systems usually have around $3000 in STC ‘rebates’, and our larger, 3-phase systems generate approximately $6000 in discounts.

However, Plico has a different payment model from other solar providers. We offer no big upfront costs* and one low weekly instalment. So how does that work with STCs and rebates? Our members’ low weekly instalment is even more affordable due to the ‘rebate’.

If you have further questions, give the switched-on Plico team a call on 1300 175 426. We can provide you with details specific to your situation.

Still wondering if solar batteries are a worthy investment? Have a read of this blog to find out if they are the right choice for you.

* On standard installations.

Small-Scale Technology Certificates (STC)

What are Small-Scale Technology Certificates?