would it be possible and/or practical to use a solar panel to power a Myth backend

Thanks. All the Motion pictures and/or video will be stored on an 80 GB hard drive in the network (the Myth backend's 2nd hard drive; it will have a 250 GB hard drive for MythTV). I'm planning on buying cheap $30 computers from eBay to use as Myth frontends for all the TVs in my house, and buying cheap $5 webcams and microphones to use as surveillance cameras with Motion on all of them (kinda reminds me of the telescreens in 1984 lol). Also, I'm planning on buying another cheap computer and webcam with a microphone I own and cheap $3 speakers and putting them by a window next to my front door. Then I'm going to make an AIM screen name and set it to always accept Talk invitations and have it always signed on. I'll also install a voice changer on my laptop which I have AIM on to make me sound like Darth Vader or something. Then, whenever someone rings the doorbell, I'll initiate a Talk session and ask the person who they are and why they're there (they won't be able to see the webcam, mic, or speakers). I might do something like that with all my frontends also, to make an intercom thingy. Also, I'll probably buy $4 dummy security cameras to put near the frontends and the front door, so people know they're being watched, but not by what, unless they see the webcam that's actually recording them. Also, I'm just wondering, would it be possible and/or practical to use a solar panel to power a Myth backend? (I live near D.C. and I won't overclock the processor)