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Manually switching cords or breakers every time power changes gets old. This automatic transfer switch manages power between shore power and a generator, using a short delay to stabilize voltage before routing power to your RV without extra steps.
When shore power is available, this transfer switch automatically connects it to your RV's electrical panel. If you start your generator, the switch waits 20-30 seconds before transferring power, giving the generator time to stabilize. When the generator shuts off, power immediately returns to shore. You're never left guessing which source is active.
Running more than one power source should never mean risking backfeed or electrical conflicts. This switch is designed so only one AC input can feed your system at a time, helping protect your wiring, appliances, and power equipment from damage caused by overlapping sources.
Power conditions are not always perfect, especially when generators are involved. The built-in time delay allows generator voltage to settle before power is transferred, helping reduce stress on sensitive electronics. The switch is made to handle real-world RV electrical loads, not just ideal conditions.
The compact enclosure can be mounted in any orientation and includes knockouts for clean wire routing, but placement matters. This switch is designed for dry locations and should be installed away from heat sources, water exposure, batteries, and flammable materials. Proper clearance allows heat to dissipate and helps the system operate reliably over time.
Alternate Instructions
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody, Andy here with eTrailer. Let's take a quick look at this PowerMax 30 AMP PMTS series Automatic Transfer Switch. Now this is an automatic transfer switch. It's going to let an RV safely move between two different power sources like shore power and a generator without you having to do anything. For RVs that run a 30 amp service, this switch is going to constantly monitor both inputs, so if you fire up the generator, this is gonna automatically sense that, and then it's gonna wait about 20 to 30 seconds to make sure that the power is stable before transferring your RV over. That delay is going to protect your appliances from voltage spikes or fluctuations.
Then when you plug back into shore power, it's going to switch back automatically. This also has a built-in safety feature. It won't allow both power sources to connect at the same time, which is going to prevent serious electrical damage. It's compact, it's reliable, and this is widely used in travel trailers, smaller motor homes and off-grid setups, where people want seamless hands-free power management. So as you can see, I did have the lid off here.
I'm gonna go ahead and pop that back on there for you just to give you the complete picture of what this is going to look like. Let me try to give you some measurements here. So looking at the overall width, we're sitting right at about seven and five eighth inches wide. The overall height about seven inches tall or so. The overall thickness or depth right at three inches.
And then lemme see if I can give you some measurements here on those mounting holes in case you were interested on center. Almost five and a half inches, and then go in the other direction up and down, about seven inches in case you we inchesre wondering. So this is gonna basically be a set it and forget it way to manage power in your 30 amp RV, and it's gonna keep your RV powered smoothly and safely, again no matter which power source you're using. Now we do have other versions of this, like a 50 amp available as well. So you can find that option and more here at eTrailer if you are looking for something other than this one in regards to amps.
Well, if you have any other questions, don't hesitate to reach out. Ultimately, we do wanna make sure that you're getting exactly what you need. Again, my name is Andy. Thank you for joining me.
Great service and quick delivery! Part was correct and is working fine!
Works as intended. I think the connections are a bit small for 6ga stranded.
They fit but are tight.
It works great. I have found out that I needed to replace my shore power cord. This product is recommended. Let’s go camping. Thank you.
Info for this part was:
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Mike L.
2/11/2026
Glad everything's working well for you, Randy. Is there any specific place you really like to camp?