STCs can be sold to electricity retailers, who are required by law to purchase a certain number of certificates each year. The value of STCs fluctuates depending on supply and demand, but homeowners can often receive a significant discount on the cost of their solar power system by selling their STCs.

Additionally, homeowners can also choose to keep their STCs and use them to offset their own energy bills. Each STC represents a certain amount of renewable energy generated, and homeowners can use them to reduce their own electricity costs. This can result in long-term savings on energy bills and a quicker return on investment for the Solar power system.

Overall, STCs provide a financial incentive for homeowners to invest in Solar power systems, making them more affordable and attractive for those looking to reduce their carbon footprint and save money on energy costs.