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The system promises to fill a drained battery to 80 percent in just 15 minutes.

Preparing for the Mission E launch, Porsche has installed its new fast-charging system at its new Berlin-Adlershof technology center.

Four customer parking lots are equipped with quick-charging columns, supporting Porsche's unique 800-volt technology that provides up to 350 kW of power.

The extremely high voltage and amperage is claimed to fill a Mission E's depleted battery to 80 percent in just 15 minutes.

In contrast, Tesla's Supercharger network runs at up to 480 volts and 120 kW of power. Owners can expect to achieve a 50-percent charge in 20 minutes, or 40 minutes to 80 percent.

It is unclear if Porsche has developed a technical solution to overcome the inherent tradeoff between battery longevity and charging rate. Tesla limits peak charging speeds after a certain number of fast-charging sessions at its Supercharger sites, minimizing battery degradation that could limit driving range.

The Mission E aims to be the first production car with 800-volt technology when it arrives toward the end of the decade.