Porsche will come out next year with an electric car based on its Mission E concept from the 2015 Frankfurt auto show.

The automaker doesn't want potential owners to worry about a lack of charging infrastructure so its dealers will install 189 fast-chargers across the country to charge its electric cars. Potential plans with other charging providers may eventually offer up to 500 fast-chargers across the country too.

Why 500? It's the number of chargers that Porsche execs believe is necessary to eliminate range anxiety for new owners.

The information was revealed to Automotive News by Porsche's local boss Klaus Zellmer in an interview published Monday.

"If you want to buy (the Mission E), you want to know what happens if I go skiing and go further than 300 miles," he said. "What do I do? So we need to have answers for that."

Porsche Mission E Cross Turismo concept

Porsche Mission E Cross Turismo concept

In addition to supporting long-distance drives, Zellmer explained that the chargers will also help ease any psychological barriers (i.e. range anxiety) owners might have, even though most will probably charge their cars at home.

The Mission E is expected to have at least 300 miles of range on a single charge. The 350-kilowatt, 800-volt fast chargers will be able to deliver an 80 percent charge—so around 240 miles—in just 20 minutes. The first was installed in Berlin last summer.

Unlike Tesla's Supercharger network, Porsche's fast chargers may not be free. The automaker is still determining a pricing scheme, though has hinted the cost per mile might be similar to gasoline.

Porsche will roll out a plan to 189 of its dealers this year for charging at those locations. Other networks with providers that may include EVGo, ChargePoint, and Electrify America could eventually bring that fast-charging network up to 500 stations across the country.

Porsche is betting big on vehicle electrification. It will likely follow up the Mission E sedan with a wagon option previewed by the Mission E Cross Turismo concept unveiled at the 2018 Geneva auto show. The automaker is also working on two next-generation electric car platforms, including one for sports cars.

Reader's note: This story has been corrected from a previous version for accuracy.