Get yours today!
In the last 7 days
Delivery timeframe shown above at checkout
Unlimited lifetime support, always available.

The Generac RTSW400A3 Automatic Transfer Switch is an essential solution for seamless backup power during utility outages. Designed for use with 400A service entrances, this switch ensures your home or business stays powered when it matters most. With its high-quality construction and reliable operation, the Generac RTSW400A3 offers peace of mind and efficient load management. It's engineered to provide optimal functionality and safety, giving users the confidence they need in critical situations.
The Generac RTSW400A3 boasts a robust transfer mechanism that guarantees instantaneous switching between utility and generator power. This feature ensures that your essential circuits remain powered without interruption, enhancing overall reliability during power outages.
This automatic transfer switch features intuitive controls that simplify operation for users. With clear indicators and a straightforward design, managing power sources becomes seamless, ensuring you can quickly respond to any power situation.
Equipped with integrated safety measures, the Generac RTSW400A3 minimizes the risk of backfeed, ensuring that utility lines are safely isolated during a power loss. This significantly enhances safety for both users and utility workers, making it a crucial feature for any backup power system.
Constructed with high-quality materials, this transfer switch is built to withstand harsh environments. Its durable design not only ensures long-lasting performance but also reduces the need for frequent replacements, providing great value for users.
The RTSW400A3 includes advanced monitoring capabilities that allow users to check system performance easily. With real-time diagnostics, users can quickly identify any potential issues, ensuring proactive maintenance and uninterrupted power supply.
The Generac RTSW400A3 operates by automatically sensing the loss of utility power and quickly switching to generator power. This process involves several key components that work together to ensure seamless operation.
This component continuously monitors utility power. Upon detecting a power outage, it signals the transfer mechanism to switch to generator power, ensuring immediate support for essential appliances.
The robust transfer mechanism within the RTSW400A3 transfers electrical loads between the generator and utility supply. It is designed for quick and reliable switching to maintain power continuity during outages.
Equipped with an easy-to-read control panel, users can monitor system status and make necessary adjustments. The panel provides essential information for error diagnostics and routine checks to ensure optimal performance.
| Manufacturer | Generac |
| Model Number | RTSW400A3 |
| Rating | 400A |
| Type | Automatic Transfer Switch |
| Service Entrance Rated | Yes |
| Voltage Compatibility | 240 VAC |
| Current Capacity | 400 Amperes |
| Dimensions | Standard Transfer Switch Size |
| Weight | Standard weight for the class |
| Installation Type | Wall-Mounted / Free-Standing |
| Compliance | UL Listed |
From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.
Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.
Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.
$150 Value - Free Offer (Limited Time Only!) No Strings Attached. Totally Free. Takes Less than 2 Minutes.