I have a Tesla HPWC in my garage but I knew we were getting a second electric car at some point so I had my electrician also install a NEMA 14-50 plug on the outside of the garage. When I got our Volt I bought a 40 amp charger that plugs right into the 14-50 plug. Maybe you should consider one of these instead of the HPWC since you renting, so if (when?) you move you can just unplug it and easily take it with you.