A rooftop solar array can cost anywhere from $15,000 (for a home with minimal energy needs in a state like Florida) to $30,000 upfront for a medium to large home further north. Accounting for the 30% solar tax credit given to rooftop panel owners brings these numbers down to about $10,000 and $25,000, respectively. Still, it’s important to recognize that every home is unique and will earn a different quote.