ai4px
Wes
Wow. That looks unnecessarily complicated. What I proposed could be done with these two products.
GE Bluetooth Smart Switch
50 amp contactor Normally Open 120V coil
The GE smart switch also has an internal timer so you can program a 7 day schedule from your iOS or Android device. No WiFi required, just Bluetooth direct from your device. In a common area parking space that will be simpler to set up and use.
This one I love... it even has a timer function so you could program it to be on in the wee hours of the morning and off during the day wen you aren't home. Ideal!