Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 12-13-2008, 05:38 PM   #1
Senior Member
 
Join Date: Apr 2008
Posts: 148
The battery of the scooter I tote on the back of my coach runs down after a month or so of inactivity. It is inconvenient to hook a charger or jumpers to it where it is mounted so I installed a DC connector on the battery of the scooter with a cord long enough to reach a DC outlet in a storage been. That way I can connect the scooter battery to the coach outlet whenever I what to charge it. Problem is, it works so well, it boils the scooter battery almost immediately. The voltage on the outlet is over 15 1/2VDC when the coach shore power is connected.

The voltages at my Magnetek 6345 converter are 12 1/2V at the house terminal and 13 1/2V at the battery terminal. How am I getting 15 1/2 volts at the outlet? The measurements were made with a quality meter within a minute or so of each other with the chassis battery switched off.
__________________

__________________
97 Aerbus XL3250, 06 Honda CH80
DIY Banks, track bar, acoustic insulation
Koni FSD front/Bilstein rear
jupoa is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-13-2008, 05:38 PM   #2
Senior Member
 
Join Date: Apr 2008
Posts: 148
The battery of the scooter I tote on the back of my coach runs down after a month or so of inactivity. It is inconvenient to hook a charger or jumpers to it where it is mounted so I installed a DC connector on the battery of the scooter with a cord long enough to reach a DC outlet in a storage been. That way I can connect the scooter battery to the coach outlet whenever I what to charge it. Problem is, it works so well, it boils the scooter battery almost immediately. The voltage on the outlet is over 15 1/2VDC when the coach shore power is connected.

The voltages at my Magnetek 6345 converter are 12 1/2V at the house terminal and 13 1/2V at the battery terminal. How am I getting 15 1/2 volts at the outlet? The measurements were made with a quality meter within a minute or so of each other with the chassis battery switched off.
__________________

__________________
97 Aerbus XL3250, 06 Honda CH80
DIY Banks, track bar, acoustic insulation
Koni FSD front/Bilstein rear
jupoa is offline   Reply With Quote
Old 12-14-2008, 01:17 AM   #3
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
Unless you have two converters there is no way possible to have two different voltages from one converter. Also it is going to be important that you manually act as a charge controller for the scooter battery. The converter you have is not going to cycle down and will boil the battery dry if you let it. There are ways to charge the scooter but you will need to install a charger made for the battery system on the scooter.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 12-14-2008, 02:51 AM   #4
Senior Member
 
Bob (WA0MQE)'s Avatar
 
Monaco Owners Club
Join Date: Jun 2003
Location: Between Colorado Springs, CO & Fulton, TX
Posts: 1,515
Blog Entries: 1
When you say you see 15.5 volts at the outlet, is this unloaded or with the scooter plugged into it? Did you try to plug in some other 12 volt device into this connector and test the voltage to see if it's any different or the same? RV Wizard is correct, you can't have two different voltages coming out of the same converter/charger. Have you traced the supply from this connector back to it's originating point?

Also, I assume you know for sure the scooter battery is a 12-volt battery. Many scooters and smaller motorcycles typically have 6-volt batteries.
__________________
Bob 2006 Monaco Camelot 40PDQ
US Navy Carrier Battlegroup 1959/1963
Summer in Colorado, Winter Texas Gulf Coast
Bob (WA0MQE) is offline   Reply With Quote
Old 12-14-2008, 04:08 AM   #5
Senior Member
 
Winnebago Owners Club
Join Date: Dec 2003
Location: MN,USA
Posts: 651
I suspect that the outlet is being tested for voltage when the engine is running and the outlet is being powered from the battery (receiving the charge). I agree that 15+ volts is unusually high.

Why would you have a scooter on the unit for over a month without using it?
__________________
2004 Itasca Sunrise 36', Workhorse
2003 Suzuki XL7
Dsouthw524 is offline   Reply With Quote
Old 12-14-2008, 01:41 PM   #6
Senior Member
 
Join Date: Apr 2008
Posts: 148
OK, after some more investigating, I've discovered the following:

The DC output of my Magnetek 6345, option A, has three possible voltage sources: the converter output, the battery output and the charger output. The battery charger has a voltage sensing circuit which toggles the output between maint. and charge.

With the shore power plugged in, there are always two voltages available from various combinations of the three sources. The converter output is isolated from the other outputs by relays when on shore/generator power and available on fuses 1 thru 6. Battery output is available on fuses 7 thru 9 and is affected by the state of the battery and the battery charger. High demand on the battey fuses pulls down voltage and causes the charger to kick in yielding, guess what?, 15 1/2 VDC! There is a lag between removing the load and the voltage returning to normal. That is how I came up with three voltages, getting the timing between unplugging my scooter and making my measurements outside and inside the coach just wrong.

I removed the converter/charger section because it is majorly full of dust bunnies. There is a voltage adjustment on the charger circuit board which may need some tweeking. While the converter is out, I,m going to look into upgrading it with a bridge rectifier and a regulation circuit. Not sure how far my electronic knowledge will get me with that.

DSouthw524, we only use the scooter when we take the motorhome out because the way we park the motorhome in a tight spot in our driveway makes it very difficult to unload and load. It weighs almost 200 lbs and does have a 12V battery.

Thanks for all the replies. I'll post again if my upgrade ideas pan out.
__________________
97 Aerbus XL3250, 06 Honda CH80
DIY Banks, track bar, acoustic insulation
Koni FSD front/Bilstein rear
jupoa is offline   Reply With Quote
Old 12-26-2008, 01:06 PM   #7
Senior Member
 
Join Date: Apr 2008
Posts: 148
Well, after considering my options, I just bought a new maintenance-free battery for my scooter with free trickle charger included and a PD9145A converter with the TCMS accessory for the coach. The PD9145 is lighter, quieter, cooler running and outputs filtered, regulated power. With the TCMS, I can leave the coach plugged in all the time without degrading the batteries.

The 9145 with separate TCMS module is about $40 cheaper than the 9245 with the TCMS built in when you purchase from PPL. Go figure.
__________________
97 Aerbus XL3250, 06 Honda CH80
DIY Banks, track bar, acoustic insulation
Koni FSD front/Bilstein rear
jupoa is offline   Reply With Quote
Old 12-27-2008, 03:52 AM   #8
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
jupoa, congratulations on the new gear! It sounds like your problems will soon be past tense for the scooter as well as keeping the house satisfied. Once you get some time to asses it let us know.
__________________

__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Reply



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
High A/C voltage -- inverter RRT2 Winnebago Industries Owner's Forum 6 11-21-2008 02:04 PM
High Voltage Question RonNBama MH-General Discussions & Problems 12 09-17-2008 07:56 AM
High Charging Voltage Blue Ribbon Workhorse and Chevrolet Chassis Motorhome Forum 4 03-09-2008 04:25 PM
tv outlet geeksquad21 Vintage RV's 2 07-16-2007 05:55 PM
HIGH Voltage billron MH-General Discussions & Problems 16 06-06-2006 05:10 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.