Italian newspaper reports that the two companies reached an agreement to allow the electric car driver to recharge their vehicles using the infrastructure of the two companies in the country.
Enel's energy e-service unit Enel X and Eni's Be Charge operate the Italian main electric vehicles (EV) with about 20 volts.
In agreement, consumers could use the charging line of their smartphones using Enel, Be Charge and Eni Apps.
"Interoperability of charging infrastructures is a fundamental element of the programme to spread electric mobility in Italy," said Federico Caleno, Head of e-mobility at Enel X.
Enel, which has more than 13,000 electric charging stations, is keen to accelerate its e-mobility business and has said that it can spin off and even list its network of charging stations.
Take Charge, the Power Power, bought by Eni earlier this year, is owned by Eni's retail and renewables unit that is planning to list next year.