Solar Impulse 2 in Hawaii
The number of passenger plug-in electric cars registered in Hawaii as of September 2015 stood at 3,750, according to the "State of Hawaii Energy Resources Coordinator’s Annual Report 2015".
Over the last 12 months covered by the report, the number of EVs increased by 829 (+28.4%).
Compared to the 1,035,653 passenger vehicles in the state, EVs hold 0.36% of the passenger car fleet today. Market share among new cars is of course much higher, although we didn't spot that number broken out.
The largest number of EVs are in Oahu (2,824), where there are 244 AC Level 2 charging spots, but most of the DC fast chargers were installed in Maui.
Hawaii boasts 21.1% renewable electricity in 2014, up from 9.4% in 2008.
Registered Electric Vehicles And Publicly Available Charging Stations In Hawaii (source: State of Hawaii Energy Resources Coordinator’s Annual Report 2015)