SOLAR CHARGE CONTROLLER

A solar charge controller for at least one solar panel array and at least one battery, the solar charge controller being adapted to be electrically connected with the at least one solar panel array and the at least one battery, the solar charge controller includes a built-in modem configured for two-way communication between the solar charge controller and a user, the built-in modem includes a soft SIM. A system including a plurality of solar charge controllers. A method of two-way communication between a solar charge controller and a user.