I use my computer to mine Bitcoins with a HD 7970 GHz Edition GPU. It currently draws a steady 465W.
I would like to offset the draw, if possible, with a reasonably priced solar panel (~240-500W). This will likely not ever power the entire computer (I live in Minneapolis, MN).
What are my options for connecting this? I'd rather not buy an inverter to make it AC and then reconvert back to DC and suffer the associated losses.
Can I regulate the output to a clean 12V1 line and connect it right to the output of the power supply, with perhaps some diodes to not have any backfeeding? Will the PSU just 'see' less draw? I'm not really concerned with the 5V or 3V3 lines, as the majority of draw is the GPU which is pulling from four 12V1 lines.
I also have this connected to a UPS on the floor, with a battery and likely it's own inverter. Can I just hook the solar panel (again with some regulation) to the battery of the UPS? What are my options here?
(also, recommendation on solar panel specifications or models would be helpful. I.E. ideal voltage output, wattage, or brand)