I've been enjoying http://abetterrouteplanner.com/
but you can also use other mapping tools and/or the apps for the larger companies Charge Point, EVgo, Electrify America.
With the better route planning tool - you can set many of your own assumptions (and actual car efficiencies, if you have them)
Last edited by JHock; 09-03-2019 at 04:48 PM.
Reason: Adding information.