I evaluated solar cells for my home, and ultimately decided against because I probably get more total energy saving from the current passive solar of having huge south-facing windows and an oak tree in front of my house - free heat in the winter, shaded in the summer. For solar electric to work, the oak tree would have to go.

That said, central issue mentioned in this article aside (which is legit concerning), cost wasn't really an issue I spent much time worrying about. Am I the only person more interested in giving the middle finger to my corrupt utility provider and their coal-centered power generation strategy than whether I came out a few bucks ahead or behind in 20 years? I suspect a lot of people who install solar have similar motivations.

But that in itself can be a problem, too. The thing that concerns me about household solar is that it's a bit like owning a Prius - it becomes a status symbol for people more interested in _appearing_ green and assuaging their guilt than actual concern about their total carbon footprint. Take a vacation to Hawaii once a year and you'll probably knock off every single bit of good you did for the planet.