So I also wonder if I have a 220V connector, can they be delivered to the garage via wi-fi?

Wifi is possible. To do this, take a twisted pair of cat5 not less, connect all the veins to 220 volts. Then clamp this cable on the other side with the rj45 connector and insert it into the wifi access point. Do not forget to set the method of access, otherwise your connector will use the whole house!! to