STC Calculator

Disclaimer

The solar water heater calculator is designed to assist members of the public to determine the approximate number of small-scale technology certificates (STCs) that may be created under the Small-scale Renewable Energy Scheme (SRES) in relation to an installation. The calculator is designed as an approximate guide only, and does not provide an accurate assessment of the number of STCs that can be created for an installation.

You should be aware that:

• The calculator does not take into account all of the variables which may affect the calculation of the STCs for an installation, and
• The calculator is based on data which may be updated from time to time and therefore results using the calculator may vary over time. In order to accurately calculate the number of STCs that can be created for an installation, you will need to consult the Renewable Energy (Electricity) Act 2000 and the Renewable Energy (Electricity) Regulations.

Includes a 10% reduction in the number of STCs. Systems eligibility for STCs and STC values are subject to change without notice and are correct at time of printing. STCs calculations are based on continuous tariff. STC values attributable to solar and heat pump water heaters are being reduced by 10% per year as of 2022. The values stated in the tables above match the values published in the register of solar water heaters. These include a reduction in STCs (checked March 2024). Use the STC calculator link www.rec-registry.gov.au/rec-registry/app/calculators/swh-stc-calculator to calculate the number of STC your installation is eligible for. The systems eligibility for STCs will be based on the year in which the system was installed.