Put the outlet so your EVSE is sitting at eye level. You're going to have to provide mounting points for the EVSE in any case so why not make it convenient for you to use? Also, I would use a red or orange outlet to make it obvious it's not a 120V outlet for someone who doesn't recognize the receptacle. You might also want to label it with voltage and rated amperage.
The 220V 20amp outlet I have in my garage is actually a little above eye level. The EVSE is mounted just below eye level.
The 220V 20amp outlet I have in my garage is actually a little above eye level. The EVSE is mounted just below eye level.