energies Article Proposal on New Tariffs with a Price Option per Use Time: Application to the Cooperativa Eléctrica San Pedro de Atacama (CESPA) Microgrid in Chile Luis García-Santander 1 , Jorge Pérez Martínez 1 , Dante Carrizo 2 , Fernando Ulloa Vásquez 3 , Vladimir Esparza 4,* and ...