A high-quality 100kW solar system in Australia typically starts from around A$39,999, making it a cost-effective choice for medium to large businesses, schools, warehouses, shopping centres, or community facilities. . On average, a 100kW solar system in Australia can generate between 380–420 kWh per day, depending on your location, panel orientation, and seasonal variations. A 100kW solar system can deliver a significant amount of clean electricity each day, but the exact figures depend on where in Australia. . The cost of installing a solar system has fallen significantly in recent years thanks to a number of factors, including Australian government incentives for renewable energy, growing competition between solar panel installers and component manufacturers, and global manufacturing trends. Depending on various factors like location and usage, your payback period could be as short as 3-5 years.