That so called Tax Incentive isn't such a bargain as far as Im concerned!
It has about as much real value as the Old Convert Your Car to run on Cheap Propane did! When Propane was 39 cents a gallon and Regular Gas was $ 1.50 it sure seemed like a great idea. Then once the numbers of Propane powered Vehicles hit an acceptable level ,they imposed a Road Tax and Propane was suddenly as much as gas!
In BC which has abundant Hydro Electric Power Plants they have advised every customer that the Electricity will cost 28 % More in a couple of Years! Ha that's more than likely going to be 100% more and there will most certainly be Road Taxes added to those that have Plug In Cars!