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Old 11-02-2014, 03:27 PM   #1
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AggieDad's Avatar
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Question Generator Power Conundrum

Several times this fall during football weekends I have lost power in our coach while the Onan Marquis (50 amp service) generator continued to run.

In every case, the problem has self-corrected -- once in just a minute or two while I was checking circuit breakers, and three times after the gen-set was shut off and re-started after some amount of wait time.

One other time upon set-up of our tailgate, it started and ran without ever giving power. After being shut off for about an hour I re-started it and there was power.

My initial reaction was that the automatic transfer switch was acting up. But I am also wondering if there is something on the generator itself that might be causing the problem.

I am open to any and all thoughts and suggestions.

Many thanks,


Don Simmons
2006 Winnebago Voyage 33V Pushed by a 2014 Chevrolet Captiva
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Old 11-02-2014, 05:07 PM   #2
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On my Onan 7500 there are 2 circuit breakers on the generator, there has been times when they will shut off power from the generator to the house and have to be reset. If you have these you may these you may try flipping and resetting.

Transfer switch would be my first guess though.

Jim J
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Old 11-02-2014, 05:20 PM   #3
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Unlke electrics in a fixed installation, RV wiring is subject to a lot of vibration from road travel. Loose connections at terminals and breakers are always a good first place to check. Always with shore, inverter, and genny power disconnected.
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Old 11-02-2014, 05:36 PM   #4
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You want to check out the auto transfer switch, I have had them fail and do what you have described. There are contact points in there and they do not last forever, particularly if connected or disconnected with a load having a high power draw turned on at the time the switch opens or closes, this can cause severe arcing. Never have any high draw equipment turned on prior to starting the jenny and never shut the jenny down while pulling a load.
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generator, power

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