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Old 07-09-2022, 07:07 PM   #1
1 Rivet Member
 
2015 16' Sport
Santa Cruz , California
Join Date: Aug 2020
Posts: 8
Voltage

I am plugged into shore power and my battery disconnect switch is off, my battery display is reading 17.5. I’m confused plus concerned I Amy damage my 12 volt fans and water pump. Any thoughts. Thanks
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Old 07-09-2022, 07:36 PM   #2
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2016 27' International
1997 34' Limited
Saint Cloud , Florida
Join Date: Apr 2018
Posts: 170
Voltage - Battery check

I assume you don't have lithium-ion batteries and you are reading the Voltage from the battery display in the galley.
I would also help if we know what year and model AS you have.

I would unplug from shore power and check the voltage at the battery with a volt meter.

If it is reading in the normal range 12-13v I would then plug it back in and then check. If it now reads high you probably have a bad charger.

Good luck
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Old 07-10-2022, 01:47 AM   #3
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2015 25' Flying Cloud
Schaumburg , Illinois
Join Date: Jun 2020
Posts: 666
couple thoughts for you to consider ...

1) simply unplug the shore power, and check the panel voltage after that ... if it changes, and is now in the 12VDC range, I agree with earlier post, it suggests your converter/charger is on the fritz. If it does not change, perhaps the panel voltage reading itself is not an accurate value, you can cross check with any portable DVM to confirm accuracy of the panel reading. Agree with earlier post, measure it right at the battery and see what voltage reading you get there, them move elsewhere in further debugging.

2) you mention the battery disconnect ... if this is the factory panel mounted battery disconnect button, that actually operates a high amperage relay to feed (or remove) the battery power into the vast majority of the trailer, that relay itself will always have access to battery power, but even in the disconnected mode, the battery is electrically coupled and some additional items still get battery power (like the LP detector).

3) If you have a separate mechanical battery disconnect in your trailer, and it is immediately at the battery terminal, that likely will completely remove the battery from the trailer power path, and the converter/charger will not "see" a battery in the system, and that might change your voltage readings.

Hope that helps you
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