Solar systems up to 100kW are considered to be small-scale and are supported b the Renewable Energy Target through the Small-scale Renewable Energy Scheme.
This scheme generates certificats which are traded to create subsidies for renewable energy projects.
For businesses investing in small-scale solar projects they assign your certificates to your solar retailer. The retailer will then discount the cost of the solar system accordingly. The discount will be around 30-40 per cent.