For reference, a mining rig that pulls 5kW will likely cost you around $20-30k and will generate a significant amount of heat. You would likely need to install

For reference, a mining rig that pulls 5kW will likely cost you around $20-30k and will generate a significant amount of heat. You would likely need to install a ventilation system to deal with the heat even in the winter months. It is also worth mentioning that in places with net metering, the excess electricity isn't "free". Excess electricity gets sold back to the grid at retail rates, and the proceeds from that are used to offset consumption during non-daylight hours. So unless you have a significant credit on your utility bill every year that you cannot utilize (most utilities will not pay you cash for the excess), then mining crypto with you "excess" solar would just result in paying for more electricity when your panels are not producing.