As i know that Solar energe is not cost-effective for mining
since you need to invest most of your money on the solar panels
and the electric is not enough for big farms
I am also interested in this question. Perhaps the developers have any subsidies from the state or large discounts on solar panels.
I think it is better to check with the administration. I only know that the price for 1 kilowatt will be very cheap. But how developers are going to pay back the cost of solar panels, I do not know yet.
maybe, over time the price will change, and it affects the performance of the team