When it comes to cost, the price of a solar system depends on several factors, including the size of the system, the type of solar equipment you choose, and the energy needs of your home or business. On average, a 5-kW system costs around $13,650 after the ITC is applied, while a 10-kW system will cost around $27,300. If you require additional solar equipment or more efficient panels, the cost may be higher. Similarly, if you opt for a smaller system or cheaper panels, you can save money.