from the Manufacturer
Become a Distributor
on volume purchases
at our Miami office
A generator shore power transfer switch is an electrical device that automatically switches your RV’s power supply between shore power (campground electricity) and your onboard generator, ensuring you never lose power to your appliances and systems.
Quick Answer for RV Owners:
A common frustration for RV owners is locating this device. One RVer posted: “I have a 2014 Forest River Sunseeker… and need to know where the transfer switch is located. I’ve looked everywhere… I simply can’t find it!”
This issue is common for those who don’t realize their coach may already have this critical safety device, or who need to add one for seamless power management.
Whether you’re dealing with power outages at the marina or simply want the convenience of automatic power switching while dry camping, a transfer switch eliminates the dangerous practice of manually unplugging and reconnecting power sources.
Generator shore power transfer switch vocab explained:
Think of a generator shore power transfer switch as the smart brain of your RV’s electrical system. It sits between your two main power sources—the shore power you plug into at campgrounds and the electricity from your onboard generator. Both sources power your RV, but they cannot safely work at the same time. If you’re new to these devices, the Automatic transfer switch entry on Wikipedia provides a helpful technical overview.
Without a transfer switch, you would have to manually unplug from one source and plug into another, which is inconvenient and unsafe. Manually switching creates the risk of backfeeding—accidentally sending your generator’s power back into the campground’s electrical grid. This is extremely dangerous for utility workers who believe the lines are de-energized. A quality transfer switch acts as a safety device to prevent this.
The convenience alone is a major benefit. When you start your generator, your RV automatically switches over without you lifting a finger. No more wrestling with heavy power cords or worrying about making a safe connection.
For a deeper understanding of how these intelligent systems manage your power needs, check out our comprehensive guide on Power Shift: All You Need to Know About Automatic Transfer Switches.
The magic behind a generator shore power transfer switch is its “break-before-make” design. This means the switch completely disconnects from one power source before connecting to another, ensuring electrical isolation.
This process uses contactor relays, which are heavy-duty electrical switches. When the switch’s automatic detection system senses stable power from your running generator, it activates. You’ll hear a distinct “clunk” as the contactors engage, confirming the switch has occurred. This mechanical action ensures your RV is never connected to both power sources simultaneously. The entire transition happens in seconds, protecting your appliances from voltage conflicts and keeping utility workers safe.
A generator shore power transfer switch transforms your RV experience. Here’s why:
Finding the perfect generator shore power transfer switch means matching the device to your RV’s electrical system and camping style. The key is to select a switch with the correct amperage rating, voltage rating, and ability to meet your power requirements. This ensures safe, reliable operation. You can explore quality options in our Automatic Transfer Switches collection.
Your first decision is whether to choose a manual or automatic switch.
Understanding these technical details is crucial for choosing the right switch.
| Feature | 30-Amp Transfer Switch | 50-Amp Transfer Switch |
|---|---|---|
| Typical Voltage | 120V AC | 120/240V AC (split-phase) |
| Number of Hot Legs | 1 | 2 |
| Total Wattage | Up to 3,600 watts | Up to 12,000 watts |
| Common Poles | 2 (Hot, Neutral) | 4 (2 Hot, Neutral, Ground sometimes) |
| Typical Price Range | $100 – $200 | $200 – $400 |
Modern RVs often have multiple power sources like solar panels and battery inverters. A standard transfer switch manages shore and generator power. For more complex systems, a multi-switch approach can be used to create a power priority system (e.g., shore power first, then inverter, then generator). Solar power typically charges batteries through the inverter system, integrating well with this setup. For more guidance on setting up these systems, see our guide on Generator Transfer Switch Kit: What to Know.
Installing a generator shore power transfer switch involves high-voltage wiring. For safety and to ensure adherence to codes, professional installation by a qualified RV electrician is highly recommended. Our team at MTS Power Products can assist with professional-grade solutions that meet the highest safety standards.
For experienced DIYers, it is critical to always refer to the manufacturer’s specific wiring diagrams and instructions included with the unit. Always ensure all power is disconnected before starting any work.
Locating an existing transfer switch can be tricky, as placement varies by manufacturer. Common locations include:
A good way to find an automatic transfer switch is to listen for a distinct “thunk” sound a few seconds after starting your generator. This is the sound of the contactors engaging and can help you pinpoint its location.
Your safety is paramount. Follow these best practices when installing and using your generator shore power transfer switch:
Even reliable components like a generator shore power transfer switch can have issues. Most problems are straightforward to diagnose, but always prioritize safety. If you are unsure, call a qualified RV technician. For complex issues, our Automatic Transfer Switch Controls are designed for reliability and easier maintenance.
If your switch doesn’t transfer power after starting the generator, investigate these common culprits:
Random power loss or flickering often points to connection or component problems.
Methodical investigation is key. Start with the simplest checks—verifying power sources and tightening connections—before moving to more complex issues.
Here are answers to the most common questions we receive about using a generator shore power transfer switch.
Yes. An automatic transfer switch is designed to safely manage this transition. You do not need to unplug from shore power first.
As a best practice, reduce your electrical load before starting the generator. Turning off air conditioners and other high-draw appliances minimizes wear on the switch’s contactors and prevents tripped breakers.
No, a standard transfer switch does not start your generator. Its job is to transfer the power after it detects the generator is running and stable.
To have your generator start automatically during a power outage, you need a separate auto-start system. This system works with your transfer switch: the auto-start turns the generator on, and the transfer switch then routes the power to your RV.
The easiest way to tell is by observing how your RV handles power switching. If it switches from shore power to generator power without you having to manually plug or unplug cords, you have an automatic transfer switch.
The telltale sign is a distinct “clunk” sound a few seconds after you start your generator or plug into shore power. That sound is the internal contactors engaging. If you hear that, your RV is equipped with an automatic transfer switch. They are often located in out-of-the-way places, so listening for the sound is the best way to find it.
The open road and endless waterways call to us with promises of trip and freedom. But nothing dampens that spirit quite like power troubles in the middle of nowhere! A quality generator shore power transfer switch transforms these potential headaches into seamless experiences, letting us focus on what really matters – making memories with the people we love.
Think about it: instead of fumbling with power cords in a thunderstorm or worrying about whether your refrigerator will keep running when shore power cuts out, you can simply relax. Your transfer switch quietly handles the heavy lifting, protecting your valuable appliances while keeping the lights on and the coffee brewing.
This isn’t just about convenience – though that’s certainly part of it. It’s about electrical safety that protects both your investment and your family. It’s about increasing your RV’s value and appeal. Most importantly, it’s about that priceless peace of mind that comes from knowing your power system just works, whether you’re plugged into a campground or running on generator power in the middle of the desert.
Here in Miami, we’ve seen how the right power equipment can make or break an trip. That’s why we’re passionate about providing professional quality generators and automatic transfer switches that you can count on. Our specialized McPherson Controls line brings together advanced features like remote monitoring with the rock-solid reliability you need when you’re miles from the nearest repair shop.
Whether you’re planning weekend getaways or full-time RV living, investing in a high-quality generator automatic transfer switch is one of the smartest upgrades you can make. It’s the difference between constantly managing your power and simply enjoying your journey.
We’re here to help you power your trips, wherever the road takes you. Because life’s too short for power problems!
