I saw amazon sell the 120V to 240V transformer. Some brands only cost < $100. (like this) Even the more expensive ones are still under < $200. (like this) Could I use this to convert my house 120V to 240V for the leaf to get level 2 charging? Is there any down side to this? I prefer this since I don't need to hire a electrician to wire a 240V outlet, and no drilling to the house. It is also portable that I could move this anywhere I like. It is also cheaper. Thanks.