Just saying it won't be even as large as Steam, given the lack of electrical hookups at this time.
The only real universal electrical socket was the Edison screw in, like used for lightbulbs, the two blade electrical plug was just coming into fashion and there were dozens of competing designs, few being interchangeable till after WWI
Even with laws pushing for electric, you will only be slightly more successful than Baker-- who was done by 1914
Problem is, Electric, it's expensive. 2-3x as much as a Model T original price, even without the infrastructure issues.
Here's a good overview of what was available in 1907