Generac 300 Amp Smart Transfer Switch RTSW300A3 | Service-Rated 120/240V NEMA 3R

Premium Whole-Home Power Protection for High-Demand Properties

The Generac Smart Switch RTSW300A3 300 Amp Service-Rated Automatic Transfer Switch delivers professional-grade backup power management for large homes, estates, and light commercial properties. When utility power fails, this intelligent transfer switch automatically activates your Generac standby generator and seamlessly transfers your entire electrical system to backup power—keeping your home or business fully operational without any manual intervention.

Built for Properties with Serious Power Demands

Engineered for 300-amp electrical services, the RTSW300A3 is the ideal solution for properties with multiple HVAC systems, workshops, pools, extensive smart home systems, or any high-demand electrical infrastructure. This service-rated unit can function as your main electrical disconnect, simplifying installation and reducing overall system costs.

Key Features & Specifications

• 300-amp service rating – handles substantial residential and light commercial electrical loads
• 120/240V single-phase configuration – compatible with standard residential electrical systems
• Smart load management technology – intelligently prioritizes critical circuits to optimize generator performance and fuel efficiency
• Automatic operation – instant power transfer with zero manual intervention required
• Service-rated design – can serve as your main electrical disconnect, streamlining installation
• NEMA 3R weatherproof enclosure – outdoor-rated for reliable performance in harsh weather conditions
• Generac-engineered integration – seamless compatibility with Generac air-cooled and liquid-cooled standby generators
• Fast transfer time – switches to backup power within seconds of detecting utility failure

Intelligent Load Shedding for Maximum Efficiency

Unlike basic transfer switches, the RTSW300A3 features advanced smart load shedding technology that automatically manages power distribution during outages. This ensures your most critical systems—HVAC, refrigeration, security, medical equipment, and communications—stay online while maximizing your generator's capacity and runtime. The system intelligently sheds non-essential loads to prevent generator overload and optimize fuel consumption.

Ideal Applications

• Large residential homes with 300-amp electrical service
• Properties with multiple HVAC zones and high electrical demands
• Homes with critical medical equipment or home offices requiring uninterrupted power
• Luxury estates with pools, hot tubs, workshops, and extensive outdoor lighting
• Light commercial facilities requiring reliable backup power
• Properties in areas prone to frequent or extended power outages

Seamless Integration with Your Generac Generator

The RTSW300A3 is designed to work flawlessly with Generac's complete line of standby generators. When utility power is interrupted, the transfer switch signals your generator to start, monitors the generator's readiness, and automatically transfers the load once stable power is available. When utility power returns, the switch seamlessly transfers back and signals the generator to shut down after a cool-down period.

Professional Installation Required

This service-rated transfer switch must be installed by a licensed electrician in accordance with local electrical codes and NEC requirements. 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 Generac's most advanced residential transfer switch technology.