Generac, 24/21 kW air-cooled standby generator, aluminum enclosure, 200 SE ATS with HEMS (not CUL). with 200 amp SER transfer switch (RXSW200A3) WiFi enabled. The new 24kW Guardian unit packs the most power into a small package, taking up to 70% less space when compared to similar output products. For the first time, homeowners can receive PWRview, Generac's home energy management system, which allows generator owners to monitor and manage their home energy usage, leading to a reduction in electric utility bills of up to 20%.