Based on current marketplace data, you're looking at around $21,000 to $23,000 before incentives for a typical 7-8 kW system, or up to $29,000 for larger 12 kW installations. This is where the numbers get interesting. 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. . NLR analyzes the total costs associated with installing photovoltaic (PV) systems for residential rooftop, commercial rooftop, and utility-scale ground-mount systems. Published: January 2026 Solar panels cost about $21,816 on average when purchased with cash or $26,004 when purchased with a loan for a 7. 5 kW of continuous power to support most household needs including heavy-load appliances. Join thousands of homeowners who have trusted Solar Electric Supply for their solar energy solutions. Most homeowners spend between $12,600 and $33,376 to install a. .
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