interesting question and that reminded me of what someone was talking about last year (maybe not 100% related to your question). I don't know if he was trolling or was really doing it but it sounded very interesting.
mining in the middle of a desert!
you will get the below 0°C temperature during nights which last nearly 9 hours. and then you get the direct sun (the free source of electricity) for the rest of the day which you can use to power up miners and set up a efficient cooling system.
the setup may need a big investment but the cost from that time forward is practically nothing.
Wow, that's counter-intuitive but its possible. Are you talking about Australia?
no it was actually in US, in Southern California I went ahead and found the guy I had in mind who said this.
https://www.reddit.com/r/Bitcoin/comments/5pe53k/i_started_mining_bitcoin_in_the_desert_heres_some/you can see the controversy in his post history too. so I don't know if he is full of it or is he actually mining in the desert. but in any case this seems like a pretty cool idea if you can come up with a nice efficiency.