Solar Panel Projects

Will a normal house thermostat run off a Solar Panel?
If not, what kind of thermostat should I use? I’d like to assemble a solar powered fan for various projects but the temperature needs to be regulated. I think I can get away with just a 12 volt computer fan and I have found the panel online but without the thermostat i’ll be in hot water. Thanks!
A normal house thermostat, doesn’t,t require any type of electricity to operate, it is Simply a mercury switch on a bi metal spring , the bi-metal coil expands and contracts, allowing the mercury to open or close a set of contacts,