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Old 09-16-2019, 11:49 AM   #21
2 Rivet Member
2017 25' Flying Cloud
Woodway , Texas
Join Date: Oct 2017
Posts: 55
Same here; when in the 'protect' mode, our 50A model has a very slight hum from the energized coil of the contactor but it's negligible. Might try dismounting it from the panel it's attached to and see if the noise abates some. If not, give Progressive a call.
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Old 09-22-2019, 06:57 PM   #22
3 Rivet Member
Tifton , Georgia
Join Date: Apr 2018
Posts: 102
Originally Posted by uncle_bob View Post

No, it's not going to get any quieter as time goes on.

These gizmos often have a fan that is driven by the temperature. When "doing nothing" they don't get very hot and the fan does not run. As they get busy, they heat up and the sensor boosts the fan. At full load the fan goes nuts. There are a lot of computer power supplies that work the same way. If yours is super loud, it likely has a defective / broken sensor.

I have he same unit and there is no fan. My suggestion would be to try to insulate the unit by using rubber washers between the unit and the wall you mounted it on. The wall is probably acting as a resonating sound board for any noise it is producing (which should be no noise). Also make sure it is installed correctly and nothing is making contact with the case. A wire against it can cause a vibration.
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Old 09-23-2019, 07:52 AM   #23
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2020 27' Flying Cloud
Tampa , Florida
Join Date: Mar 2019
Posts: 24
It has quitened down now

Hello everyone,
It took a couple of days but now I have to put my ear to the cabinet to be able to hear the humming. It had gotten a bit quieter after the power went out briefly the second day after I installed it.
Thanks for the help. The next time I have a reason to pull the power center out again I will put in rubber isolators.

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Old 09-23-2019, 08:05 AM   #24
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2004 28' Classic
Roebling , New Jersey
Join Date: Sep 2018
Posts: 16
No Noise at All

Our hardwired 30 amp unit is under the bed where the shore power cable enters.
No sound what so ever and I screwed it directly into framing and mouse fur.
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Old 09-23-2019, 09:09 AM   #25
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2017 22' Sport
NCR , Ontario
Join Date: Feb 2017
Posts: 2,369
make sure that it is firmly screwed onto a solid surface.
the transformers do vibrate, this is normal
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