Computer Controlled for Maximum EfficiencyRheem is proud to offer the new SEREGEN 400 Series 30 and 45kW Liquid-Cooled Home Generator Systems. Boasting a GM Vortec engine and up to 56,000 watts of starting power, these systems offer whole house comfort and control in an extremely compact, quiet and affordable package. The standard 30 and 45kW packages supply enough automatic backup power to manage two 5-ton AC units. The optional Power Management System upgrade optimizes the Seregen 400 Series with advanced computer-controlled power for maximum efficiency.