I am having an electrician run a new 50A 240V line to my garage to charge my soon-to-be-received Tesla S. He is doing this when he replaces my existing Zinsco box. I also have an existing 30A 240V dryer outlet that can be extended to the location of the Tesla plug. Is there anyway to combine those two power sources to charge quicker? If so, what adapter would I use on the mobile charging cord? Or is there a different way to go? Thanks.