It's official now: Porsche will put its striking and all-electric Mission E concept car into production within three to five years.

One of the hits of the Frankfurt Motor Show held in September, the low, sleek, four-door Mission E concept represented Porsche's take on an all-electric luxury sport sedan.

The company announced on Friday that the supervisory board of Porsche AG had given the green light for production of the car at its main assembly plant in Zuffenhausen, Germany.

DON'T MISS: 2018 Porsche Mission E: 600-HP Electric Sport Sedan Concept Targets Tesla

It's the latest of several recent electric-car announcements from Volkswagen Group, the world's largest carmaker.

Others include production of the Audi e-tron quattro battery-electric crossover utility vehicle, likely in 2018 or so.

Then came an all-electric Volkswagen Phaeton luxury sedan that is to follow, probably using the same underpinnings and electric drivetrain.

Porsche Mission E Concept - 2015 Frankfurt Auto Show live photos

Porsche Mission E Concept - 2015 Frankfurt Auto Show live photos

But the Mission E stands out both for its focus on pure performance and its launch by the famed sports-car marque that likely produces the highest profits per car of any maker in the sprawling VW Group.

In addition, Porsche discussed a planned 800-volt DC fast charging system that would allow the Mission E's large battery pack to be recharged to 80 percent in 15 minutes or so.

How and when Porsche would build such a recharging network remains entirely unclear.

ALSO SEE: Germans Vs Tesla In High-End Electric Cars: Will Fast Charging Follow In Time?

For that matter, so does Audi's announcement that it will have a 150-kilowatt fast charging network to accompany the production version of the e-tron quattro when it launches.

Pervasive fast-charging networks may be the key to mass acceptability of electric cars in all segments, modeled to a large extent on the spreading Tesla Supercharger network.

The Mission E concept car is "a clear statement about the future of the brand," said Dr. Wolfgang Porsche, chairman of the Porsche AG supervisory board.

Porsche Mission E Concept - 2015 Frankfurt Auto Show live photos

Porsche Mission E Concept - 2015 Frankfurt Auto Show live photos

"Even in a greatly changing motoring world," he continued, "Porsche will maintain its front-row position with this fascinating sports car."

And that statement led Road & Track to an interesting speculation: What if the Mission E actually enters production not as a four-door sedan, but as the next iconic Porsche 911 sports car?

Regardless of its format--low, sleek sport sedan or out-and-out two-door sports car--the production Mission E will likely have specifications at least as good as those of the concept car.

MORE: How Audi, BMW & Mercedes Plan To Compete With Tesla--And Why (Dec 2014):

That vehicle had combined outputs from multiple electric motors of more than 440 kilowatts (600 horsepower), giving a 0-to-62-mph acceleration time of 3.5 seconds.

A large battery pack integrated into the floor would provide range of more than 310 miles (500 kilometers) and be recharged either by the 800-Volt DC fast-charging network or a wireless inductive charger for home installation.

Much remains to be learned about the Porsche Mission E over the next four years--not to mention the evolution of Silicon Valley electric-car startup Tesla Motors.

But it's yet another indication that the German prestige brands continue to see all-electric cars as a necessary component of their future product lineups.


Follow GreenCarReports on Facebook and Twitter.