Solar is definitely the future, especially here in Thailand when we have more sunlight than enough!
Have you ever worked out just how many panels you'd need to produce enough for your mining rigs? I keep meaning to do the maths myself to work out how big a system 'd need to set-up a decent mining rig AND run the aircon in a dedicated room for it.
The ROI might be huge, especially with a large enough battery bank to to keep things running through the night but with the fluctuations in prices, might be rather a large risk!
Yeah solar is awesome, my rigs use about 1000W of power which is over 10x what my lights use. So I would need at least 20 batteries and 30 panels.. thats just a wild guess.
ROI depends on replacing those batteries.. could be expensive.