Porsche hopes to have at least one 800-volt CCS ultra-fast DC charger at each of its 189 U.S. dealerships as well as a network of at least 300 additional highway corridor chargers by the time the product version of its forthcoming Mission E model arrives in late 2019.
According to an article in Automotive News, the chargers can be bundled with a stationary battery that can allow for fast charging an average of 3 cars in a row while reducing the immediate power demand on the dealer’s utility grid connection.
The Mission E and a variant known as the Mission E Cross Turismo, available in 2020, are likely to be the first available cars that can utilize over 500 volts when recharging. These cars can use 800-volt charging in order to exceed a peak of 200 kW per vehicle but retain the ability to charge at around 400 volts for backwards compatibility when connected to less-capable equipment.
See also: How does 800V charging work?
All US dealerships are said to have already undergone an on-site installation evaluation within the last 6 months. Total install costs for dealers would likely exceed $100,000.
Automotive News quoted the CEO of Porsche Cars North America, Klaus Zellmer, as saying the use of battery buffering is “much cheaper” than an installation using a direct grid connection. A direct grid-connected installation at Porsche’s Atlanta, Georgia offices cost more than $1 million for 6 charging stalls.
The charging cost to individual drivers has not yet been determined. It’s not clear if other brands of cars would be allowed to use the Porsche dealership chargers.
Porsche is planning to collaborate with ChargePoint, EVgo, and Electrify America on 300 or more ultra-fast highway “chargers” but details about this part of the effort are uncertain. It’s unclear if these would be Porsche-funded chargers beyond existing plans or just collaboration on site locations or interconnected billing systems. It’s also unclear if this is a count of individual charging stalls or charging locations.
ChargePoint has a new line of highly-configurable Express Plus charging equipment for sale later this year to local installation site owners.
EVgo is a charging provider with over 1,000 chargers in the United States but has said it is primarily focusing on metropolitan area installations in the near future.
Electrify America is part of the same corporate Volkswagen Group as Porsche and is already in the process of installing nearly 300 ultra-fast charging locations along U.S. highway routes by June, 2019 with 4 to 10 charging stalls each.
The plans say about half of the Electrify America charging stalls at 50 California sites are intended to support 800-volt charging at theoretical power rates of up to 350 kW. The remaining charging stalls would support lower “150 kW” charging rates. It’s unclear what the ratio of 350 kW and 150 kW charging equipment would be at the over 240 locations outside of California.