FWIW, IMHO, if you'll be moving your EVSE so will need to plug and unplug it from the wall, you need to be conscious of maintaining a viable socket. More than a few people have run into problems with the typical socket their electrician wired in for them, avoiding the higher quality one that should work longer without issues. The one often used is plastic, costs in the $20 range. One that will last longer without breaking down and potentially melting, is more like $120 and is made of Bakelite, which can handle the heat from the extended times the EVSE may be on. That type of plug is often used on a stove or drier, that typically doesn't run continuously, as their heating elements will be cycling on/off, limiting the heat buildup. But, an EVSE will run continuously, without turning off for potentially hours, and heat buildup then becomes an issue.
My preference on any EVSE installation is to hardwire the thing...one less connection and less likely to develop problems.
The spring tension on the socket will be degraded by the heating/cooling and also by the insertion/removal of the plug. Just be aware of that. If it isn't stiff to insert the plug, replace the socket.