Solar farm costs range from $600,000 to $1,300,000, with most homeowners investing an average of $950,000 depending on the project's size and complexity. Homeowners may pay as little as $300,000 for a small, simple farm design or up to $1,600,000 or more for a large, custom system. . The cost to build a solar farm varies depending on the capacity of the solar panels. Benefits like long-term savings & green energy solutions will make it an essential investment. Solar farms use photovoltaic panels to. . Based on current market data from SEIA and industry reports, utility-scale solar farm costs range from $0. Department of Energy (DOE) Solar Energy Technologies Office (SETO) and its national laboratory partners analyze cost data for U. - YouTube Ground Mount Solar. .