William Wei, Business Insider
To mark the occasion, two teams will race to set a cross-country speed record in an electric vehicle, Musk continued.
Superchargers allow Tesla owners to charge their cars quickly and for free, for life. The network is a big part of Tesla's efforts to convince drivers that range anxiety - the fear of running out of power on the road - shouldn't stop them from going electric.
There are currently 71 stations in North America and 14 in Europe. Tesla says that covers about 80% of the U.S. population.
Musk also confirmed he will set off on the cross-country trip he first announced in May, accompanied by his five young sons:
Will be doing the LA-NY family road trip over Spring Break. Made everyone watch National Lampoon's Vacation as prep.
- Elon Musk (@elonmusk) January 26, 2014
Here's the current state of the Supercharger network in the U.S.:
Musk Tweeted that the two teams will depart Los Angeles on Friday and should arrive in New York on Sunday.
According to EV charging network PlugShare, one duo racing cross-country is John and Jill:
Congratulations to John and Jill, first to drive across US using only free @TeslaMotors Superchargers! pic.twitter.com/hA6YlkyjzN
- PlugShare (@plugshare) January 26, 2014
Last week, Tesla announced its European customers can now move between the Netherlands, Germany, Switzerland, and Austria using only Supercharger stations to fill up their batteries.