90 per watt without labor and other fees. Since your typical solar panel system size is 6. 5 kW, anticipate spending around $3,900 for the panels alone, or somewhere between $1,950 and $5,900. . 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. Your actual cost depends on your home's energy needs, roof characteristics, location and other factors, all of which we'll break down in. . Solar panels cost about $21,816 on average when purchased with cash or $26,004 when purchased with a loan for a 7. Department of. . In this guide, we'll break down average solar costs per square foot in 2025, show how they compare by home size, explain why this metric has limits, and give you expert tips to reduce your price. How big your home is and how much electricity you use are the main things affecting your cost. A small 1,000-square-foot condo. .
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