Generac Automatic Transfer Switches are designed for use with single phase generators that utilize an Evolution or Nexus Controller. The 100 Amp open transition switch is available in single phase with a service equipment rated configurations. Through the use of digital power technology DPM, these switches have the capability to manage up to 4 individual HVAC 24 VAC controlled loads with no additional hardware.Service rated Generac automatic transfer switches are housed in an aluminum NEMA/UL type 3R enclosure, with electrostatically applied and baked powder paintHeavy duty Generac contactor is a UL recognized device, designed for years of service, the controller at the generator handles all the timing, sensing, exercising functions and transfer commandsUsed in tandem with smart management modules, up to 8 more loads can be managed as well, providing the most installation efficient power management options available