STCs are available to households and small enterprises who have or need solar panel systems with a capacity of 100KW or less. If exceeded, this marker, then you will not be eligible but rather considered for LGCs.  

Here’s what you need about the scheme – 

• 1 megawatt of electricity replaced by your opted renewable energy source will generate 1 STC 
• These certificates are meant to be sold to large electricity retailers who emit the most GHG gasses  
• Only CEC-approved solar installers are eligible to sell these certificates (in the case of solar) 
• The number of STCs generated will be dependable on the MWh of energy replaced by your system over the course of one deeming year or 5 years 
• The price of each certificate is determined by the supply and demand of certificates  
• A cash amount will be adjusted from the final bill after the estimation of STC numbers are at hand by your installer  
• Deeming period in STC means the number of years left before you can take advantage of the scheme, and with each year passing till the end year of 2030, the incentive amount decreases.  
• The Small-scale Technology Percentage (STP) determines how many STCs the liable parties must submit  
• The 2023 STP is 16.29%, meaning large energy retailers are legally obligated to surrender 28.5 million STCs to meet their SRES goal.  
• STCs can be traded in the open market or in a clearing house. The clearing market offers a fixed price per certificate, whereas the open market prices fluctuate. N.B- price per certificate cannot exceed $40 Aud.  
• Depending on the size of the system, zone, date of installation, etc., the calculation of STCs will differ. An accredited person only is eligible to do so.  

Learn more extensively about how STC works on the government website here. For simple elaboration, follow this link.