Whole-Home Power Protection for High-Demand Properties The Generac 400 Amp Smart Transfer Switch (RTSC400A3) delivers enterprise-grade automatic power transfer for large residential estates, multi-panel homes, and light commercial buildings. When utility power fails, this service-rated transfer switch instantly and automatically shifts your entire electrical system to backup generator power—keeping your home or business fully operational. Intelligent Load Management Unlike conventional transfer switches, the RTSC400A3 features smart load prioritization technology that intelligently manages power distribution during outages. This ensures your most critical systems stay online while maximizing your generator's capacity and runtime efficiency. Key Features & Benefits 400-amp service rating – handles the highest residential and light commercial electrical demands Automatic operation – seamless utility-to-generator transfer with no manual intervention required Smart load shedding – prioritizes essential circuits to optimize generator performance Compatible with Generac generators – engineered to work flawlessly with both air-cooled and liquid-cooled standby units Service-rated design – can serve as your main electrical disconnect Weather-resistant NEMA 3R enclosure – built for outdoor installation durability Specifications: Model: RTSC400A3 Amps: 400 Voltage: 120/240, 1ø Load Transition Type (Automatic): Open Transition Enclosure Type: NEMA 3R ETL Rating: cETLus Withstand Rating (Amps): 22,000 Lug Range: 600 MCM - #4 or (2) 1/0 - 250 MCM Ideal Applications Large estates with multiple HVAC systems and high electrical loads Homes with multiple electrical panels requiring whole-property coverage Light commercial facilities needing reliable backup power Properties with critical medical equipment or home offices Luxury homes with pools, workshops, and extensive smart home systems Professional Installation Required This transfer switch must be installed by a licensed electrician in accordance with local electrical codes. Professional installation ensures safe, code-compliant operation and proper integration with your Generac standby generator system. Protect your investment in comfort, security, and productivity with the most advanced transfer switch technology available.
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