Tesla Supercharger appears to successfully charge a Ford Mustang Mach-E

A Ford Mustang Mach-E appeared to be successfully charging at a Tesla Supercharger in Franklin, Massachusetts, over the weekend. While Tesla Superchargers are not wholly available to other EVs, a few forgotten Tweets from CEO Elon Musk remind us that the automaker may be quietly allowing competing companies to utilize the largest electric vehicle charging …