- This paper presents a study of feasibility assessment of the installation of a photovoltaic system to supply energy to the external lighting of a private mining company, located in Cerro de San Pedro, San Luis Potosí, Mexico. The photovoltaic system will charge batteries during the day, and then these batteries will be used to provide the electricity to the external lighting over the night. This scheme aims to replace the utilization of diesel generators used in conjunction with the lightning system. For completeness of this work, the economical study including the payback time is reported. © 2014 IEEE.