We just got our Y delivered a couple of weeks ago. We are in a rental and cannot install a wall connector. The electrical panelboard shows that the wire to the garage is 15 amp. There are lights etc. and garage door opener using the 15 amp. Can I plug a mobile connector to the outlet in the garage? Is this a high risk for overloading? There is a fridge in the garage now but I am planning to unplug it (permanently). Thank you!!