Electric Power Controls Home Construction New Equipment Work Tools Electric Power Controls Enable Javascript in your browser to allow sorting products Cat® Microgrid Master Controller-Small (MMC-S) Application Microgrid Control Module Type Monitoring / control and asset optimization Application Microgrid Control View Full Specs Cat® Microgrid Master Controller-M (MMC-M) Application Photovoltaic and energy storage systems Module Type Monitoring / control, assets optimization Application Photovoltaic and energy storage systems View Full Specs