A design study for the second version of the Porsche Mission E electric sport sedan broke cover Tuesday at the Geneva auto show.

The closely guarded concept car is effectively a shooting brake version of the low-slung Mission E sedan that debuted at the 2015 Frankfurt show and will go on sale by 2020.

Paralleling the Gran Turismo version of the Porsche Panamera sedan, the Mission E Cross Turismo concept has "good prospects for series production," according to the presentation.

DON'T MISS: Porsche Mission E electric sedan buyers want, expect fast "Turbo Charging"

That's about as close as you can get to confirmation for a model that won't likely appear until 2021 at the earliest.

Porsche has begun to issue regular updates on its Mission E project as more luxury electric models start to hit the market in Tesla's footsteps.

First to come was the Jaguar I-Pace, a five-seat all-electric crossover utility vehicle whose production version debuted last Friday.

Porsche Mission E Cross Turismo concept

Porsche Mission E Cross Turismo concept

It will go on sale in the U.K. this summer and in the U.S. during the second half of this year.

The Audi e-tron electric crossover will follow roughly the same schedule, though its production version did not appear in Geneva as some had expected.

A BMW iX3 electric crossover will come in 2020 as well, and the Mercedes-Benz EQC crossover will round up the German luxury makes next year as well.

CHECK OUT: Porsche Mission E electric sedan to offer 300 miles of range, 400 hp, at minimum

As for the Cross Turismo concept, Porsche referred to it as a crossover utility vehicle, though we'd call it a shooting brake like the Panamera Gran Turismo.

The Mission E variant's ride height is only somewhat higher—though the heavily treaded tires on blue spoked wheels gave it a definite rock-climbing vibe, as much as any Porsche can be said to go there.

Porsche says the newest concept combines the “everyday usability” of the Mission E with the added bonus of “off-road adventure."

Porsche Mission E Cross Turismo concept

Porsche Mission E Cross Turismo concept

Befitting a crossover utility, the Mission E Cross Turismo offers all-wheel drive from an electric motor for each axle—as did the coupe-like sedan concept that preceded it—with a total output of 450 kilowatts (600 horsepower.)

An exterior mounting system offers the ability to carry bicycles or surfboards, something Porsches haven't necessarily priortized in the past, perhaps.

The larger and more capacious Cross Turismo version of the Mission E offers similar performance: Porsche quotes a 0-to-62-mph time of less than 3.5 seconds and a top speed of 155 mph.

WATCH THIS: Porsche Mission E electric car concept design video (Apr 2016)

The Mission E is expected to pioneer 800-volt DC fast charging, which will allow an 80-percent battery recharge (for 200 miles or more) in roughly 15 minutes.

For all the latest about green-car concepts and production models on display in Switzerland, see our Geneva auto-show news page.

Porsche provided airfare, lodging, and meals to enable Internet Brands Automotive to bring you this first-person report.