Large panels are never worth it.  That's a fairly low price but out of my budget.  Also, I don't have room for it I think it has nothing to do with manufacturing price and everything to do with small solar panels only being able to sell for hobbyist price and large ones being able to be sold for super rich pro-green hippie prices I mean yeah thicker gauge cable in the whole system and a more expensive regulator and/or inveter isn't free but it isn't thousands of dollars more either.  They're jacking the prices up.

Btw..."just take a basic mining rig with a couple of 5870's"  Yeeeeeeah, that's a real basic rig *eye roll.* So triple the price on 3 cards and just under triple the mining power...and triple the heat to deal with and a way more than triple the price 3x PCI-E x16 board and a more than triple the price power supply.  That's not really the ideal rig as far as money vs bitcoins goes.  It will create more bitcoins faster but would take longer to pay itself off.  Also, DEFINITELY not for this kind of project.  You want to keep the power as low as possible while maintaining a respectable MH/s.  This rig I have should be able to theoretically push out 300MH/s on 250-300W.  Plus, I don't have enough room to create a device of any sort capable of suppling 750W in a green way.

I was actually considering a turbine based system with wood burning cuz mirrors are a pain and there's lots of geometric math and astronomy and crap involved.  But burning wood is about is green as the dead trees you're burning

I think with my budget, for now, I'm going to attempt the proposed "supplemental power" idea.  That's AC house voltage running everything but a solar panel wired in parallel to the graphics card so it's up to a 50% load reduction.  It's the cost of the panel kit plus $5 in wiring and that's it.  It can't get any simpler.  It's not a 100% free electricity solution but it will definitely take a sizeable chunk out of the electricity costs to operate it.