The Mission E concept offers a glimpse of the final model's design
The Tesla Model S-rivalling model, which is referred to as J1 internally and nicknamed Pajun (Panamera Junior) by the media, was given the green light for production in 2015 and is set to go on sale in 2020.
It has been conceived to sit on a bespoke platform designed to accommodate a lithium ion battery pack capable of providing the car with a range of more than 330 miles. In combination with two electric motors, the sleek four-door promises a 0-62mph time of just 3.5sec.
The new platform is said to be separate to the structure being developed by parent company Volkswagen for its new range of electric cars, which includes a production version of the Budd-E concept first seen last year at the Consumer Electronics Show in Las Vegas.
This week's Mission E test car has exhaust pipes, but they are likely left on due to the fact the body is borrowed from a Panamera. The lack of dirt on them supports that they're not functional.
Heading development of the zero-emissions Porsche is Stefan Weckbach, who previously led product strategy and more recently was responsible for the development of the Boxster.