Seeing as one of the most power-vampiric entities is your from the home theater system, the team at Home Theater Specialists of America (HTSA) has done the good deed and created a system that's the first to entirely utilize solar power to feed the hungry 100-inch screen, 5.1 channels of sound, and oodles of A/V equipment sitting in the side cabinet shelf. Let's take a look at how they did it, shall we?
Using 175-watt Sharp solar panels laid side by side, the 700 watts per hour collected during the daytime amounts to about 22,000 watts of collected power week. The solar PV system is also tied to the grid, so any excess power that doesn't get sucked up by the home theater gets sent back into the grid. Doing so turns back the meter on the house, saving them money and helping out the community at the same time.
As far as feasibility goes, the home theater itself cost them a good $29,575 to build, but the solar panels only put them back $5,800 to install. Don't worry, after the 30-35% federal and state tax credits, the system comes down to about $2,000. Not bad if you think about it as a long term investment, in which the system would probably pay itself off in less than 3 years.
More details about the equipment, the installation team, and HTSA can be had at Electronic House.