When we assess the seven best solar energy financing options, we identify cash purchases, solar loans, leasing, and alternative solutions, each with distinct advantages. It examines the advantages and disadvantages of each financing option, including the impact of government. Given the relatively high interest rates, solar. com recommends homeowners pay for their solar investment in cash if they can. Investing in solar energy can significantly reduce energy costs and carbon footprints, but the upfront costs are often considered a barrier. Typically provides the highest long-term savings and fastest payback period.