Insuring an electric vehicle is the same as insuring a conventional gasoline-powered vehicle. All drivers must have at least the minimum liability coverage required by the laws of their state. This pays for other people's medical bills or property damage if the policyholder causes an accident. Most places don't allow travel to Mexico.
If you want to travel to Mexico, you will be required to take out additional insurance to cover the vehicle while you are in Mexico. Please contact the branch directly to determine limitations and availability. Electric vehicle owners who are willing to put their safe driving skills to the test could also try usage-based car insurance.