Are you looking for the best automatic transfer switch rated at 100A? We provide detailed reviews and recommendations to help you choose the ideal switch for your home or business needs.
Power outages can be a hassle, but with the Best Automatic Transfer Switch 100A, you can keep your home or business running smoothly. These switches automatically switch to backup power, ensuring your essential systems stay on during outages.
We’ve tested and reviewed the top 100A automatic transfer switches to help you find the perfect fit. Whether you need indoor or outdoor use, load management, or fast transfer times, we’ve got you covered.
List of Top 10 Automatic Transfer Switch 100A
| Image | Title | Best For | Price |
|---|---|---|---|
![]() |
100 Amp Automatic Transfer Switch Single Phase Generator Transfer Switch, Power Management Replacement for Generac RXSW100A3, NEMA 3R Outdoor Rated Aluminum Enclosure for Indoor and Outdoor Use |
This 100 Amp Automatic Transfer Switch is perfect for homeowners, small business owners, and anyone using a single-phase generator. It provides a reliable way to switch between main and backup power, ensuring that your home or business stays powered during outages. |
|
![]() |
100 Amp Automatic Transfer Switch Replacement for Generac RXG16EZA3 for Indoor and Outdoor Use, 16-Circuit, NEMA 3R Aluminum Enclosure |
This 100 Amp Automatic Transfer Switch is perfect for homeowners who use air-cooled generators. It is great for both indoor and outdoor setups, protecting against rain and snow. With its 16-circuit panel, you can easily customize your electrical needs. This switch is ideal for those who want to keep essential areas powered during an outage. |
|
![]() |
Generac 100-Amp Automatic Generator Transfer Switch, Single Phase, Service Entrance Rated, NEMA 3R Outdoor Enclosure |
This Generac 100-Amp Automatic Generator Transfer Switch is perfect for homeowners who want reliable power backup. It automatically switches to generator power during outages, ensuring your home stays safe and comfortable. |
|
![]() |
100Amp AC110V Automatic/Manual Transfer Switch 2P 50/60Hz, 2POLE 100A Mini ATS Solar Auto Dual Power Switch for Home Generator, Din Rail Mounted Cn Automatic Changeover Fast Transfe for Rv, Lv Power |
This 100Amp AC110V Automatic/Manual Transfer Switch is perfect for homeowners and businesses that need a reliable power supply. It quickly switches between main and backup power, making it ideal for places like hospitals, data centers, and cold storage facilities where power outages can be critical. |
|
![]() |
Generac 100-Amp Generator Transfer Switch, Automatic Smart Transfer Switch, 120/240V Single Phase, NEMA 3R Enclosure, Load Management Ready |
This Generac 100-Amp Generator Transfer Switch is perfect for homeowners who want reliable backup power during outages. It is ideal for those with multiple circuits, especially for HVAC systems, ensuring your home stays comfortable when the power goes out. |
|
![]() |
100 Amp Single Phase Generator Automatic Transfer Switch Compatible with Generac RXSW100A3, 120/240V, NEMA 3R Aluminum Enclosure, Indoor/Outdoor Use, Power Management Compatible |
This 100 Amp Automatic Transfer Switch is perfect for homeowners who want reliable backup power during outages. It’s ideal for those with Generac generators and essential circuits to protect. |
|
![]() |
100A Automatic Transfer Switch,220V Generator Transfer Switch,Millisecond Level Dual Power Automatic Transfer Switch, with Metal Distribution Box |
This 100A Automatic Transfer Switch is perfect for anyone needing a reliable power backup. It’s ideal for homes, hospitals, cold storage, data centers, and emergency systems. |
|
![]() |
100Amp AC220V Automatic/Manual Transfer Switch 2P 50/60Hz, 2POLE 100A Mini ATS Auto Dual Power Switch W2R for Home Generator, Din Rail Mount Cn Automatic Changeover Fast Transfe for Solar,Rv,Lv Power |
This 100Amp AC220V Automatic/Manual Transfer Switch is perfect for homeowners, businesses, and anyone who relies on a stable power supply. It quickly switches to a backup power source during outages, ensuring your important devices stay powered. This product is ideal for hospitals, data centers, and cold storage units that need constant power. Its reliable performance protects against voltage issues, making it a smart choice for those who can’t afford power interruptions. |
|
![]() |
Automatic Transfer Switch, 100 Amp 3 Pole Auto Transfer Switch for Home Generator, 120/240-Volt 24,000W Stronger Stability, for Outdoor and Indoor with Ground, General 60HZ (100A-3P-10 x8 x4) |
This Automatic Transfer Switch is perfect for homeowners and business owners who need reliable backup power. It’s ideal for outdoor and indoor use, ensuring uninterrupted electricity for generators, solar systems, and high-power appliances. |
|
![]() |
Automatic Transfer Switch 100A AC110V/220V, Dual Power ATS 2P/4P Automatic/Manual Transfer Switch din Rail mounting for Home Generator, RV,Public/Backup Power Supply |
This Automatic Transfer Switch is perfect for homeowners, businesses, and emergency services that need a reliable power supply. It ensures your lights and equipment stay on during power outages, making it ideal for anyone who values safety and consistency in their electricity. |
Detailed Reviews
Discover the top 10 Automatic Transfer Switch 100A picks, carefully selected based on expert reviews and customer feedback. Each product is evaluated for performance, features, and value, ensuring you find the perfect fit for your needs. Whether you prioritize reliability, ease of use, or affordability, this guide has you covered. Dive in to find the best Automatic Transfer Switch 100A that keeps your power stable and uninterrupted.
1. 100 Amp Automatic Transfer Switch Single Phase Generator Transfer Switch, Power Management Replacement for Generac RXSW100A3, NEMA 3R Outdoor Rated Aluminum Enclosure for Indoor and Outdoor Use

Power up with confidence using the KUTTOLE 100 Amp Automatic Transfer Switch. This single-phase generator switch is a reliable power management solution for your home or business. It ensures seamless power transfer during outages.
The NEMA 3R-rated enclosure makes it weatherproof and durable, perfect for outdoor use. Its rust-proof design guarantees long-lasting performance, even in harsh conditions.
With wide compatibility, this switch is a direct replacement for Generac RXSW100A3. It manages multiple HVAC loads and is easy to install with the provided manual. KUTTOLE offers dedicated support and a 1-year replacement for peace of mind.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 100 Amp Automatic Transfer Switch is perfect for homeowners, small business owners, and anyone using a single-phase generator. It provides a reliable way to switch between main and backup power, ensuring that your home or business stays powered during outages.
Ready to Purchase?
2. 100 Amp Automatic Transfer Switch Replacement for Generac RXG16EZA3 for Indoor and Outdoor Use, 16-Circuit, NEMA 3R Aluminum Enclosure

The 100 Amp Automatic Transfer Switch is a reliable solution for power management. It works with air-cooled generators, ensuring a smooth transition from utility to generator power.
This switch comes in a NEMA 3R aluminum enclosure, protecting it from rain, snow, ice, and debris. It’s perfect for indoor or outdoor use, keeping internal parts safe.
With a 16-space breaker panel, you can customize circuits easily. It’s ideal for partial building power needs and includes a one-year warranty for peace of mind.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 100 Amp Automatic Transfer Switch is perfect for homeowners who use air-cooled generators. It is great for both indoor and outdoor setups, protecting against rain and snow. With its 16-circuit panel, you can easily customize your electrical needs. This switch is ideal for those who want to keep essential areas powered during an outage.
Ready to Purchase?
3. Generac 100-Amp Automatic Generator Transfer Switch, Single Phase, Service Entrance Rated, NEMA 3R Outdoor Enclosure

The Generac 100-Amp Automatic Generator Transfer Switch is a reliable power solution for your home. It automatically switches to generator power during outages, keeping your essentials running. This service entrance-rated switch is designed for residential standby generators.
It features DPM load management, handling up to four HVAC loads. The NEMA 3R enclosure is weather-resistant, perfect for outdoor use. This switch also includes a service disconnect for safe maintenance.
With its automatic transfer and load management, this switch offers peace of mind. It’s a complete package, including the enclosure and controls, ready for easy installation.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Generac 100-Amp Automatic Generator Transfer Switch is perfect for homeowners who want reliable power backup. It automatically switches to generator power during outages, ensuring your home stays safe and comfortable.
Ready to Purchase?
4. 100Amp AC110V Automatic/Manual Transfer Switch 2P 50/60Hz, 2POLE 100A Mini ATS Solar Auto Dual Power Switch for Home Generator, Din Rail Mounted Cn Automatic Changeover Fast Transfe for Rv, Lv Power

This 100Amp AC110V Automatic/Manual Transfer Switch keeps your power stable and reliable. It switches between two power sources in just 0.05 seconds, ensuring no interruptions. Perfect for homes, RVs, and high-demand systems.
Works in automatic or manual mode. LED lights show which power source is active. Protects against over-voltage and under-voltage, keeping your devices safe.
Great for hospitals, cold storage, and data centers. Easy to install on a Din Rail. Ensures continuous power when you need it most.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 100Amp AC110V Automatic/Manual Transfer Switch is perfect for homeowners and businesses that need a reliable power supply. It quickly switches between main and backup power, making it ideal for places like hospitals, data centers, and cold storage facilities where power outages can be critical.
Ready to Purchase?
5. Generac 100-Amp Generator Transfer Switch, Automatic Smart Transfer Switch, 120/240V Single Phase, NEMA 3R Enclosure, Load Management Ready

The Generac 100-Amp Generator Transfer Switch is a smart solution for reliable home backup power. It automatically switches between utility and generator power during outages.
This transfer switch features a 100A single-phase design, compatible with Generac generators using Evolution or Power Zone 200 controllers. Its NEMA 3R enclosure ensures durable, weather-resistant performance outdoors.
With load management, it prevents generator overload and supports load shedding for up to 4 HVAC circuits. The expandable system allows you to prioritize additional loads as your backup power needs grow.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Generac 100-Amp Generator Transfer Switch is perfect for homeowners who want reliable backup power during outages. It is ideal for those with multiple circuits, especially for HVAC systems, ensuring your home stays comfortable when the power goes out.
Ready to Purchase?
6. 100 Amp Single Phase Generator Automatic Transfer Switch Compatible with Generac RXSW100A3, 120/240V, NEMA 3R Aluminum Enclosure, Indoor/Outdoor Use, Power Management Compatible

This 100 Amp Automatic Transfer Switch is a reliable power solution for your home. It works with Generac RXSW100A3 and 8-24 kW generators. It keeps your essential circuits running during power outages.
The weather-resistant aluminum enclosure protects it from rain, snow, and debris. It also manages up to 4 HVAC units without extra tools, preventing overload.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 100 Amp Automatic Transfer Switch is perfect for homeowners who want reliable backup power during outages. It’s ideal for those with Generac generators and essential circuits to protect.
Ready to Purchase?
7. 100A Automatic Transfer Switch,220V Generator Transfer Switch,Millisecond Level Dual Power Automatic Transfer Switch, with Metal Distribution Box

Need a reliable power backup solution? The 100A Automatic Transfer Switch ensures stable power supply for your home, hospital, or data center. Its dual power system switches to backup power in just 0.05ms, keeping your essential systems running smoothly.
This switch comes with a durable metal distribution box featuring a transparent flip cover for easy monitoring. The high-quality steel shell protects the switch, ensuring safety and longevity.
Widely applicable, quality assured, and easy to use. Enjoy a 30-day return policy and a 3-year warranty for peace of mind.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 100A Automatic Transfer Switch is perfect for anyone needing a reliable power backup. It’s ideal for homes, hospitals, cold storage, data centers, and emergency systems.
Ready to Purchase?
8. 100Amp AC220V Automatic/Manual Transfer Switch 2P 50/60Hz, 2POLE 100A Mini ATS Auto Dual Power Switch W2R for Home Generator, Din Rail Mount Cn Automatic Changeover Fast Transfe for Solar,Rv,Lv Power

This 100Amp AC220V Transfer Switch keeps your power stable and reliable. It automatically switches between two power sources in just 0.05 seconds. Perfect for homes, generators, and solar systems.
It works in automatic or manual mode. Use LED lights to see which power source is active. It also protects against over-voltage and under-voltage.
Made from high-quality PA6, it’s strong and durable. Comes with a 30-day return and 3-year warranty. Ideal for hospitals, cold storage, and data centers.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 100Amp AC220V Automatic/Manual Transfer Switch is perfect for homeowners, businesses, and anyone who relies on a stable power supply. It quickly switches to a backup power source during outages, ensuring your important devices stay powered. This product is ideal for hospitals, data centers, and cold storage units that need constant power. Its reliable performance protects against voltage issues, making it a smart choice for those who can’t afford power interruptions.
Ready to Purchase?
9. Automatic Transfer Switch, 100 Amp 3 Pole Auto Transfer Switch for Home Generator, 120/240-Volt 24,000W Stronger Stability, for Outdoor and Indoor with Ground, General 60HZ (100A-3P-10 x8 x4)

Automatic Transfer Switch keeps your power steady. It switches to backup power when the main power fails. This ensures uninterrupted electricity for your home or business.
Built tough for harsh weather, this switch works indoors and outdoors. It handles up to 100 amps and is great for high-power appliances.
Safety features protect against overload and damage. Easy wiring and low energy use make it a smart choice. Professional installation is recommended for best results.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Automatic Transfer Switch is perfect for homeowners and business owners who need reliable backup power. It’s ideal for outdoor and indoor use, ensuring uninterrupted electricity for generators, solar systems, and high-power appliances.
Ready to Purchase?
10. Automatic Transfer Switch 100A AC110V/220V, Dual Power ATS 2P/4P Automatic/Manual Transfer Switch din Rail mounting for Home Generator, RV,Public/Backup Power Supply

This automatic transfer switch is a reliable power solution for homes, RVs, and public spaces. It handles 100A current and 110V/220V voltage, ensuring stable power supply.
It offers dual-mode operation, automatic or manual, for easy control. LED indicators show the status, making it simple to use. The DIN rail mounting ensures quick installation.
Built with high-quality materials, it provides long-lasting performance. Multiple protections keep your system safe from electrical issues. Ideal for continuous power needs in various settings.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Automatic Transfer Switch is perfect for homeowners, businesses, and emergency services that need a reliable power supply. It ensures your lights and equipment stay on during power outages, making it ideal for anyone who values safety and consistency in their electricity.
Ready to Purchase?
Buying Guide
Power outages can disrupt your life. A 100A automatic transfer switch keeps your home or business running smoothly. This guide helps you pick the best one for your needs.
Buying a 100A automatic transfer switch is easy when you know what to look for. Here’s what to consider:
- Power Needs: Check your home or business’s power demands. A 100A switch works for most, but ensure it matches your generator’s capacity.
- Indoor/Outdoor Use: Choose a switch with a NEMA 3R enclosure for outdoor use. It protects against rain, snow, and debris.
- Transfer Speed: Look for fast transfer times, like 0.05 seconds, to avoid power interruptions.
- Load Management: If you have HVAC systems or high-demand appliances, pick a switch that manages multiple loads to prevent overloading.
- Compatibility: Ensure the switch works with your generator brand, like Generac, for seamless integration.
- Installation: Some switches are easy to install, while others need professional help. Check the manual before buying.
- Warranty: A 1-year warranty or longer gives you peace of mind and protects your investment.
- Manual/Automatic Mode: Choose a switch with dual-mode operation for flexibility in controlling power sources.
- Safety Features: Look for over-voltage and under-voltage protection to keep your devices safe.
- Durability: A rust-proof, weather-resistant design ensures long-lasting performance in harsh conditions.
With these factors in mind, you’ll find the perfect 100A automatic transfer switch for your needs. Stay powered up!