The SM IO module provides monitoring of auxiliary equipment such as climate control units through detailed information and alarms. When maintenance is performed using the information from SM IO, time and money can be saved especially for remotely located sites. The SM IO connects to the DC power system's control unit and monitors auxiliary units. Information and alarms regarding the auxiliary equipment can be monitored through a web browser or management software. Benefits include lower maintenance costs and higher availability through remote monitoring and control of site equipment.