Does anyone know of an "official" wall charger cable lock or other solution to keep others from using the charger? Mine is exposed and I may need to secure it when not in use.
Put the whole thing in a DIY lockbox. Problem solved.
have a lockable power disconnect put in line with it. You can cut the power to the wall charger when not in use by you. Or turn off the breakers powering the charger if they are in a secure location