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08-09-2015, 06:16 PM
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#1
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Member
Join Date: Oct 2013
Location: South Texas
Posts: 56
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Chassis batteries
We have been home a little over two weeks since our vacation trip. Went to move MH today to prep for next one and chassis is dead as a hammer. MH has been plugged into 50 amp in my shop since we got back. Will call CS tomorrow because it is not an emergency but does anyone know 100% that the inverters will charge chassis? The battery boost button will get the transmission display to boot up but nothing else. Has anyone experienced this? Do I just need to keep a trickle charge on chassis? Thanks for any advice.
Robert, Mary & the boys
2015 Cornerstone K
Sent from my iPhone using iRV2 - RV Forum
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Robert, Mary, and the boys
2015 Cornerstone 45K
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08-09-2015, 06:28 PM
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#2
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Senior Member
Tiffin Owners Club
Join Date: Mar 2015
Location: Southern NM
Posts: 2,514
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I am not sure what accessories run on the chassis battery when parked, but I would think 2 weeks would be a short time for the battery to be dead
sorry I cant help
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2005 Tiffin Allegro Bay 37DB
W22 Workhorse Chassis 8.1 Flat Towing a 82 Jeep CJ7
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08-09-2015, 06:32 PM
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#3
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Senior Member
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 31,720
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The inverter does charge all batteries when plugged into shore power.
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Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold
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08-09-2015, 06:43 PM
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#4
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Member
Join Date: Oct 2013
Location: South Texas
Posts: 56
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Ok will try to get something from CS tomorrow to see if a fuse is blown or something. I have a battery lead and small wire that are just taped off in DEF compartment.
Robert, Mary & the boys
2015 Cornerstone K
Sent from my iPhone using iRV2 - RV Forum
__________________
Robert, Mary, and the boys
2015 Cornerstone 45K
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08-09-2015, 07:28 PM
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#5
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Member
Join Date: Oct 2013
Location: South Texas
Posts: 56
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Chuck do you know any specific about which inverter may do the charging? Experimented with the charger portion of both inverters and never saw a change in the Chassis voltage. It must have worked in the past though because this is the first issue we have had??
Robert, Mary & the boys
2015 Cornerstone K
Sent from my iPhone using iRV2 - RV Forum
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Robert, Mary, and the boys
2015 Cornerstone 45K
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08-09-2015, 07:34 PM
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#6
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Senior Member
Monaco Owners Club Vintage RV Owners Club
Join Date: Feb 2015
Location: East Texas
Posts: 716
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The alt and generator will charge mine chassis , the house batteries are charged when on shore power or generator.. on mine
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1995 Monaco Dynasty
32' B5.9 Banks, 6 speed Alison 3060
2008 HHR Panel toad 
Safe-T-Plus
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08-09-2015, 07:41 PM
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#7
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Junior Member
Join Date: Oct 2009
Posts: 9
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On my coach, shore power (and gen) does not charge chassis. Only running the motor does. When shut down for about 3 weeks or more, the chassis batterys will be down, maybe even dead UNLESS I shut off the main chassis power switch. Then it can sit for months. Not sure why, always has been this way.
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08-09-2015, 07:45 PM
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#8
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Senior Member
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 31,720
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I do not. That is one thing I have not worked on is the inverter/chargers. The first thing I would try would be the circuit breakers on the inverters in the basement located above and behind the slide out freezer. Are the chargers turned on at the inverter panel?
I had my batteries go dead while plugged into shore power for no reason. Never did figure out what caused it. Unplugged and plugged back in and everything worked.... the batteries recharged.
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Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold
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08-09-2015, 07:46 PM
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#9
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Senior Member
Newmar Owners Club
Join Date: Feb 2012
Posts: 1,519
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I'm not an Entegra owner, but I would be very surprised if the shore power did not charge the chassis batteries, especially on a Cornerstone! I'm certain something is not right! Have it checked and hope you report back as to what it is.
All the best!
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2008 Newmar Dutch Star 4304
2005 HR Navigator 45PBQ - SOLD
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08-10-2015, 08:46 AM
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#10
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Senior Member
Entegra Owners Club
Join Date: Oct 2010
Location: East Greenwich, RI
Posts: 2,300
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I was told by Entegra that this battery isolation manager is installed on my Entegra:
Battery Isolation Manager (Control & Relay) 160Amp Continuous | Precision Circuits Inc.
It will connect/disconnect the house and start battery banks together as needed to keep both of them charged as well as not overcharged. Charging sources are the Magnum inverter/charger and the engine alternator.
There are documents at the link above that provide all the details as well as a troubleshooting document. It might be worth verifying the proper operation of this device as you work thru your issue.
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08-10-2015, 10:45 AM
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#11
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Member
Join Date: Oct 2013
Location: South Texas
Posts: 56
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Rob,
Thanks for the documentation - will troubleshoot when I get home this evening. I am currently waiting on a call back from CS about the problem. Thanks Robert
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Robert, Mary, and the boys
2015 Cornerstone 45K
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08-10-2015, 10:58 AM
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#12
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Senior Member
Join Date: Sep 2013
Location: Foxberry Farm Knoxville, Tn
Posts: 160
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I am sure you checked but on my Anthem I have twice had the battery cable work itself loose from the terminal.
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08-10-2015, 01:41 PM
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#13
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Senior Member
Join Date: Dec 2014
Location: Central Florida
Posts: 169
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Quote:
Originally Posted by srh
I'm not an Entegra owner, but I would be very surprised if the shore power did not charge the chassis batteries, especially on a Cornerstone! I'm certain something is not right! Have it checked and hope you report back as to what it is.
All the best!
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I am sure shore power does also charge the chassis batteries. I have a Cornerstone and we were parked twice already this year for over 5 weeks while on 50 amp shore and I never had any issues starting the coach.
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Bob & Sandy
2022 Renegade Ikon / 2020 GMC Sierra
2015 Entegra Cornerstone-sold/2019 Newmar Mountain Aire-sold
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08-10-2015, 03:55 PM
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#14
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Senior Member
Join Date: Apr 2004
Location: Stillwater, Ok
Posts: 4,812
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All Entegras charge both house and chassis batteries when on shore power, when everything is working right. 🚌🚓
2016 Cornerstone 45B on order
Formerly 2011 & 2013 Anthems
2014 Lincoln MKT towed
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2020 New Aire 3543
2018 Lincoln MKX
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