50A, Power Management Module, Must Purchase Starter Kit, Generac #6199, Before This Item Can Be Used, 24Vac Actuated Contactor Housed In A NEMA 3R Enclosure For Indoor & Outdoor Installation Applications, Through The Use Of The Power Management Modules In Conjunction With Any Of The 100-800A Single Phase Smart Switches, Household Or Business Loads Can Be Intelligently Managed Enabling The Use Of A Smaller, More Efficient Generator System, Up To 4 Power Management Modules Can Be Used With A Single Switch, Up To 3 Power Management Module Modules To Be Combined With The Power Management Module Starter Kit, After Power Management Module Loads Are Shed, They Are Brought Back Individually To Assure Generator Capability & Eliminate The Potential Of Overload.