Solar panel installation cost averages $27,181 for a standard home, with most homeowners spending between $18,351 and $36,409. Prices vary based on system size, panel type, and installation complexity. 50 per watt installed, with larger systems. . Solar panels can lower your electricity bill by 75% or more, but the upfront investment is significant. Most homeowners spend between $12,600 and $33,376 to install a complete residential solar system in 2026, with the national average at $19,873 before incentives. Department of Energy, the all-in cost of a home solar panel system is between $2. Check with a local pro for your specific job. How Much Money Can You Save Using Solar? On average, homeowners save approximately 20% on their power bill when they switch to solar power. Where you live, the number of panels you need, maintenance requirements, and available rebates all determine the final price.