In short: Rooftop solar and plug-in solar solve different problems. Rooftop is the powerful, whole-home option for people who own a suitable roof and can invest in a larger system. Plug-in solar is the small, affordable, renter-friendly option for the large share of households that cannot access rooftop, or for anyone who wants a low-commitment way to start. Neither replaces the other, and the right choice depends on your home and your goals. If you are comparing plug-in sola