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Old 06-27-2016, 12:02 PM   #1
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When is a drop in volts unsafe for your RV

I have a 2104 coachman 310bhds and the CG we are staying at has some old electrical lines in it. When running the air conditioning the volts in the camper drop to 109-111. So far I have not seen it any worse then that but we have the fridge and water heater both on gas to try and not draw any other power. I have heard that the air conditioner may fry up running on volts that are that low, could some one tell me if that is true? I also heard someone got an autofomer to try and up the volts coming into the camper. Do these work? What is the down side to using one? Thank you for your help

Todd



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Old 06-27-2016, 12:07 PM   #2
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Hello,
There will be lots of replies.

Simply stated;

I would not worry at 109 volts. Current goes up when voltage goes down. You are doing the right thing shedding load.

You can use a autotransformer to boost the voltage but depending on 30 vs 50 amp service they can be quite costly.

Camp and enjoy the time away.
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Old 06-27-2016, 12:14 PM   #3
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Id start to be concerned under 105 volts.

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Old 06-27-2016, 12:35 PM   #4
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Progressive Industries power monitors cut out at 104 volts so your 109-111 should be fine.
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Old 06-27-2016, 02:02 PM   #5
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10% let's say you had 120v then anything below 108v.most things will run on around that area.
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Old 06-27-2016, 02:08 PM   #6
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we have a Progressive industries 30 amp hard wired unit and 3 weekends ago teh power kicked off watching tv.
the next morning when the wife tried to make coffee and toast int eh 5th wheel the toaster kicked out and the coffee pot would not run without kicking out and having to be reset a couple minutes later.

the display was showing 106.
when we got back to our seasonal and plugged in - we were back above the 120 mark
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Old 06-27-2016, 02:22 PM   #7
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Quote:
Originally Posted by windsurfdog View Post
Progressive Industries power monitors cut out at 104 volts so your 109-111 should be fine.
X2. My PI 30A EMS does the same thing.

OP: What was the voltage at the post?

The only time it has been a real problem was at a campground where the power post had only between 109V and 111V. The AC starting would cause the voltage to drop 104V or less and the EMS would shut down power. Prior to the AC kicking on, we were only using about 2A of current. An electric kettle also did the same thing at that site. All the nearby sites I checked had the same low voltage that weekend.
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Old 06-27-2016, 03:34 PM   #8
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On my second year with the autoformer and it has been great. After my many years camping the big problem is low voltage. My 30 amp unit does a great job of protecting my circuits and keeping my voltage at a useable level. I don't want my air to turn off at low voltage...with the autoformer it keeps running. Seems like a lot of state parks around me have older over taxed systems. I am at one right now and air is running and I am reading 119 inside RV. Pole has been lower the few times I have checked it. I would not go camping without it.
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Old 06-27-2016, 05:49 PM   #9
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Id start to be concerned under 105 volts.

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Old 06-27-2016, 07:02 PM   #10
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Thanks for the replies. I will see what happens this weekend when the CG is full for the holiday. If it stays in the 109-111 range with the air conditioner running I will just let it go.


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