In addition to the expansion of the Tesla Supercharger network itself, Tesla is improving the technology behind the Tesla Supercharger to dramatically decrease the amount of time it takes to charge Model S, cutting charging time in half relative to early trials of the system. The new technology, which is in beta test mode now and will be fully rolled out to customers this summer, will allow Model S to be charged at 120 kW, replenishing three hours of driving in just over 20 minutes.