While the upfront costs of solar panels have dropped by over 70% in the past decade, a comprehensive lifecycle analysis includes several key components: initial purchase and installation ($15,000-$25,000 for an average home system), ongoing maintenance (roughly $300-500. While the upfront costs of solar panels have dropped by over 70% in the past decade, a comprehensive lifecycle analysis includes several key components: initial purchase and installation ($15,000-$25,000 for an average home system), ongoing maintenance (roughly $300-500. Wondering if solar panels are the right move for your home? It really depends on a few key factors, like how much sun your roof gets, how much energy you use, and what kinds of savings you're hoping for. Solar panels work best on roofs that get steady, direct sunlight, especially those facing south. Solar panels promise decades of clean energy and reduced utility bills, but understanding their true lifetime costs reveals a more complex financial picture than just the initial price tag. Even though they cost less than a professional solar panel installation, plug-in solar panels are not worth the expense. Still, solar energy isn't for everyone. Sunlight is by far the earth's most plentiful. Installing solar panels on your roof and hooking them up to the grid or your home electrical system involves lots of hardware, but much of the expense of a typical residential installation comes from "soft" costs.