I am renting a house, and have been plugging in my Tesla and getting 5 miles per hour. And then I realized that looks like I can do a 6-20 based on the input of the plug. This is an outdoor plug that the sprinkler system is plugged into. Is that correct? Is there anything else I need to know about the receptacle? Like I said I'm renting so I really don't know much about it, should I just go buy a adapter. Hope that works and gets me more than the normal charging I'm doing right now?