Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  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 09-19-2017, 07:07 AM   #1
Junior Member

Join Date: Aug 2015
Location: Various
Posts: 20
Onan 10K Generator - Question on Separate Start Battery Scenerio

I am considering installing a separate 12v battery to start my Onan 10k generator. I've had some issues in the past with not enough power from my coach batteries (on a 2011 Phaeton) to start it so am looking into this. Has anyone done this themselves and can offer advice? I'm aware that I'll need to install a trickle charger, among other things. I know this is treating the symptom, not the cause, but I like this idea as a backup if nothing else. Thank you!

jumper777 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 09-19-2017, 07:17 AM   #2
Senior Member
Sbrownstein's Avatar
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 353
If you have a boost switch you can use it to start your generator when the house can't seem to do it. In addition, you could rewire the generator to start off of the chassis battery, which is pretty much what a boost switch does anyway.

Scott Brownstein
Palm Island, Florida
2015 Georgetown 335DS
Sbrownstein is offline   Reply With Quote
Old 09-19-2017, 07:32 AM   #3
Senior Member
vsheetz's Avatar

Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 12,488
Originally Posted by Sbrownstein View Post
If you have a boost switch you can use it to start your generator when the house can't seem to do it. In addition, you could rewire the generator to start off of the chassis battery, which is pretty much what a boost switch does anyway.
I have 2012 Phaeton. When dry camping it's not uncommon for the house batteries to not have enough juice to start the 10k generator after overnight. Push and hold the boost switch for a few seconds - continue holding the boost switch and start the generator. Fires right up every time.

Some people have installed another battery just for the genny. I think there are posts with details on TRVN.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Old 09-19-2017, 07:57 AM   #4
Senior Member
Monaco Owners Club
Join Date: Sep 2013
Posts: 754
I considered it but in the end I cleaned all of the ground connections as well as the 12 v connections and terminals which cured my problem.
2007 Monaco Signature Noble III 45' ISX 600HP
hypoxia is offline   Reply With Quote
Old 09-19-2017, 09:06 AM   #5
Senior Member
Hgrace56's Avatar
Join Date: Jan 2016
Location: Northridge, CA
Posts: 1,052
I just carry a compact Lithium ion jump kit if there are issues.
Can charge m portable devices with it too.
Hgrace56 is offline   Reply With Quote
Old 09-20-2017, 07:55 AM   #6
Senior Member
joedaddy805's Avatar
Join Date: Oct 2015
Posts: 108
I did this one my toy hauler. I converted to 2 6volt batteries. Then I put a lil riding lawn mower battery to start my Generator. Very simple job. I just took the starting cable from Gen and ran it to new battery. As of now I just have a charger plugged in to keep it charged till i wire up the charging system for it. But since Ive done this I have never had to go out in the cold morning and jump start my Gen. Best upgrade Ive done so far. I just bought a lil ride on lawn mower battery and but a lil frame to mount it under the trailer. I think it cost me 30 bucks to do it since the battery only cost me 20 bucks fro Walmart.

2005 Vortex
joedaddy805 is offline   Reply With Quote

battery, generator, onan

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
Onan 10k diesel Cranks but will not start ...Help RobRoy Monaco Owner's Forum 81 01-29-2017 06:59 AM
I have a 2009 Scepter with a 10k Onan generator that won't start.It has a code 32(se DaveyD1 Monaco Owner's Forum 3 08-29-2016 07:35 PM
Onan 10k generator block heater redbaron73 Newmar Owner's Forum 5 12-19-2012 09:55 AM
Onan 10K Diesel Generator al_mers MH-General Discussions & Problems 7 02-26-2010 10:49 AM

» Virginia Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:09 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.