* "Design" is subjective: What constitutes a "different" design? Are minor trim variations different designs? Are different battery pack sizes considered different designs? Different wheel options? The definition greatly affects the count.
* Constant evolution: New models and redesigns are constantly being released. Any number given at one moment in time will quickly become outdated.
* No central registry: There's no global database tracking every single electric vehicle design ever created.
Instead of a number, it's more accurate to say there are hundreds, if not thousands, of different electric car designs currently on the market and in various stages of development, depending on how you define "different design". This includes variations across brands, models, and even within model years.
