The average cost of large solar panels varies depending on several factors. Additionally, installation costs typically range from $1. Hidden costs significantly impact. 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. To find the most up-to-date solar panel costs in 2025, we compared research from the U. 00 per watt. Each year, the U. Department of Energy (DOE) Solar Energy Technologies Office (SETO) and its national laboratory partners analyze cost data for U. solar photovoltaic (PV) systems to develop cost benchmarks. These benchmarks help measure progress toward goals for reducing solar electricity costs. Quoting a large solar project feels like a gamble. Miscalculate the costs, and you could lose the bid or, even worse, win the project and lose money on it.
[PDF Version]