Expect a price in the ballpark of $2. 25 per watt before incentives. Payback is often 7–12 years, depending on your utility rates and sun. . How much does it cost to install and manage solar panels? According to studies by the U. Using these numbers. . The cost of a Tesla Solar Roof can be prohibitive, depending on the size of your roof, how much power your home needs and the condition of your current roof. I'll analyze the costs of a solar roof and how a solar roof compares to solar. . Traditional solar panels typically range from $2. For a standard 7 kW system, suitable for many single-family homes, total expenses before incentives fall between $19,000 and $24,500.