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Old 07-09-2017, 12:21 PM   #1
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House Batteries not charging on shore power but do with generator.

Wondering if this is a bad charging switch or could low/bad batteries hamper the switch. From my reading on electrical issues with this -the generator is the primary and the shore power is the secondary charge/power source for the coach. Could the switch be stuck or bad.
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Old 07-09-2017, 12:23 PM   #2
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And yes there is power to the 50 amp service. 120 on both legs.
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Old 07-09-2017, 12:41 PM   #3
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Auto transfer switch?
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Old 07-09-2017, 12:46 PM   #4
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Does anything else in the coach work when the genny is off? Microwave, etc. Sounds like a bad transfer switch but it still could be supplying 1/2 of the panel with shore power.
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Old 07-09-2017, 01:02 PM   #5
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Auto transfer switch?
Yes
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Old 07-09-2017, 01:06 PM   #6
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Does anything else in the coach work when the genny is off? Microwave, etc. Sounds like a bad transfer switch but it still could be supplying 1/2 of the panel with shore power.
I got 0's showing on my AC panel on shore power but normal with the generator.
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Old 07-09-2017, 01:07 PM   #7
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The auto transfer switch could be stuck. Disconnect all power sources then open it up and clean/tighten the connectors.

(Or tap the box with a hammer first to see if it frees up.)

My Freedom 25 Inverter also has a transfer switch breaker button that could be popped.
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Old 07-09-2017, 01:07 PM   #8
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I never hear the transfer switch kick over to shore power.
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Old 07-09-2017, 01:21 PM   #9
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The transfer switch is stuck in the generator position. You can open it and see why. Either welded contacts, mechanical interference or something. You can manually wire around it so that you can have shore power or generator...but not both.

Relatively easy to do.
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Old 07-09-2017, 03:26 PM   #10
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The transfer switch is stuck in the generator position. You can open it and see why. Either welded contacts, mechanical interference or something. You can manually wire around it so that you can have shore power or generator...but not both.

Relatively easy to do.
I've been down that road before and ordered a new transfer switch from CC. One of the 50amp house legs burned up. No house air for our first trip. Not good. This is different, every works on generator and even inverter mode except AC. Is there a different switch for charging.
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Old 07-10-2017, 12:28 AM   #11
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Another thing to look at is the connections in the transfer switch and also the breaker panel. They have a habit of loosening off as the vibrations of travelling down the road shake them around. Most RV's use regular house wiring connectors, and these do not stand up well to the punishment we put them though driving over many miles.
Good Luck, and Happy Glamping.
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Old 07-10-2017, 07:14 AM   #12
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Another thing to look at is the connections in the transfer switch and also the breaker panel. They have a habit of loosening off as the vibrations of travelling down the road shake them around. Most RV's use regular house wiring connectors, and these do not stand up well to the punishment we put them though driving over many miles.
Good Luck, and Happy Glamping.
I'm also going to check the 50amp Male plug by checking current at the surge protector and if necessary the transfer switch. Thanks everyone!
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Old 07-11-2017, 09:17 AM   #13
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I am having the same type of problem. Yesterday while plugged into shore power the house batteries were not being charged. I was getting a low battery warning. On my coach there are 2 8D batteries for the engine and 2 8D for the coach. Where would the most likely place for this transfer switch be located? In the basement there is a electrical room with the panels and the inverter/ converter Is this where that switch might be? What do they look like ?
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Old 07-11-2017, 09:28 AM   #14
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I am having the same type of problem. Yesterday while plugged into shore power the house batteries were not being charged. I was getting a low battery warning. On my coach there are 2 8D batteries for the engine and 2 8D for the coach. Where would the most likely place for this transfer switch be located? In the basement there is a electrical room with the panels and the inverter/ converter Is this where that switch might be? What do they look like ?
That's where mine is. I've spent Time in there already. Good thing I'm still nimble as a cat squirrel!
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