Why do you support solar power? Is it because you love dolphin babies? It’s because you love dolphin babies, isn’t it?
SunRun, the company behind this ad and a couple of other equally funny ones, is a solar leasing company. They'll install panels on your house for no money; you just have to commit to buying your electricity from them for a few years. Customers save money (although ultimately not as much as they would if they bought their own solar panels) with no hassle -- and literally everybody likes saving money with no hassle.
That means that, as the ads point out, you don't have to be a treehugging weirdo hippie pickler guy or gal to want solar panels (although that's fine, too). You just have to be a cheap-ass, like the rest of us.