Is your home powered by a solar panel system?

We seem to be having a huge push to buy solar panels & I’m NOT so sure that I believe all the hype!!! I understand the concept of solar powered panels. My question is do they really work after several cloudy days??? I have solar lights in my yard & after about 2 days of cloudy skies, they fail to work. Since the panels are constructed a bit differently, I’m hoping that they store better!!! So, I think that I need 2 questions answered. Are they cost efficient or how long before I break even on cost??? How often do they fail to support your home’s basic needs???