Abstract: An input-power switcher for a telecom site includes a sourcing unit for configuring two or more alternative energy sources as available at the telecom site. The switcher includes a pricing unit for storing time-varying price references from one or more different suppliers for at least one of the two or more alternative energy sources. The switcher includes a processing unit for selecting one amongst the two or more alternative energy sources for powering the telecom site The selection is made on the basis of the alternative energy sources available at the telecom site and the time-varying price references in the pricing unit The processing unit is in communication with the sourcing unit and the pricing unit. The switcher includes an actuator unit for switching to the selected, alternative energy source for powering the telecom site. The actuator unit in communication with the processing unit. A method of using an input-power switcher for a telecom site.