The two things required for electric vehicles are a motor and source of electricity. right now batteries are the usual source of electricity. Foe a few decades now, there has been a line of thought that the electricity needed could be generated as needed. this was the futuristic promise of fuel cells a few decades back. Another example, if you believe such myths, was the alleged Gamma ray converter reported to have been developed by Tesla, and for which conspiracy folks say he was killed. There are also several scattered news accounts of motors that run on the earth's magnetic field. These are generally from around 1920. but there are several of these reports about different inventors independent of the others. I once had a collection of these news reports. Allegedly an airplane that ran on the earth's magnetism out in Western Pa. An electric car that generated it's own electricity out in Denver. Even a motor that did not use electricity, but ran on magnetism, which is what electric motors do. The reporter said that as the armature of the motor was turned parallel to the earth's magnetic axis, the motor sped up, turn the motor away from such alignment and it slowed. Some or all of such things may have been snake oil. However any body who ever used two pieces of wire to find a buried pipe or septic tank, knows that there is some force that causes those wires to move.