Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 12-01-2004, 07:27 PM   #1
Wagon Master
Join Date: Aug 2004
Posts: 34
Question Univolt is it working??

1968 univolt: Took the cover off, blew all the dust out, put it back together and hooked it back up. I put a multimeter on it and it said 11.17 volts. Ove hour later it read 11.40, 2 hours later it was at 11.7. I figured this is the battery voltage, right? So how can you run the 12v stuff in the trailer if it takes so long to charge? The readings were with no lights on or anything else 12v. Once the batterys are at full charge (13.8v) does it make more power to run the 12v stuff or is this not working right. I have never used a Univolt before. It makes a buzzing sound when on, and there is some kind of smell that you can smell when you re-enter the trailer. It may just be "old smell" as the last owner parked it from th etime they bought it and the owner before them had it parked for a number of years also.


Igor68 is offline   Reply With Quote
Old 12-01-2004, 08:38 PM   #2
Rivet Master
RichardT's Avatar
Join Date: Sep 2003
Posts: 932
Take the battery out for a minute to really test it, it can run without the battery indefinitly , but it is best to have a battery in.
Check it under load by turning on some lights.
RichardT is offline   Reply With Quote
Old 12-02-2004, 04:46 AM   #3
Retired Moderator
john hd's Avatar
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40

what do you have for a voltmeter?

some can be off by as much as a couple of volts. a quick test is to turn on some lights with a battery installed, then turn the univolt on/off see if the lights get brighter when you turn it on.

it is good you are seeing and increase over time. your voltmeter just might be slightly off.

because univolts are ferroresonate chargers they need the battery in the circuit to operate properly and will actually show a higher voltage with a battery connected vs. a no load reading without a battery in the circuit.

you call them ferrets, i call them weasels.
john hd is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Univolt FACTS smily Electrical - Systems, Generators, Batteries & Solar 69 08-18-2005 11:47 PM
1981 Airstream Excella Univolt dienst1 Airstream Motorhome Forums 1 08-20-2002 09:05 AM
Bad Univolt? pebblepoint Batteries, Univolts, Converters & Inverters 1 07-14-2002 10:08 PM
univolt III wiring McGill Electrical - Systems, Generators, Batteries & Solar 0 07-05-2002 08:26 PM
Univolt Operation melprice Electrical - Systems, Generators, Batteries & Solar 11 06-17-2002 04:13 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 12:10 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.