According to Solar Choice's own data, the average 10kW solar system price in Australia as of July 2025 is about $0. 91 per watt – or about $9,130 after the federal STC rebate is deducted. How many panels & how much roof space. Browse articles about Cost Of A 10kw Solar Containerized Container For Australian Mines – mobile photovoltaic containers, industrial battery storage, containerized BESS, and integrated renewable energy solutions from ROCKSTEADY ENERGY. The cost. A 10kW solar system in Australia costs $9,200 – $10,200, produces around 38–44 kWh per day, and typically suits large homes and small businesses looking to save $3,000–$3,800 per year, depending on usage and feed-in tariffs.