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

Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 08-20-2020, 11:58 AM   #1
Junior Member
 
Brand: Thor Motor Coach
Model: Hurricane
State: Kentucky
Posts: 8
THOR #19504
Batteries

I have mistakenly left power on and upon return both coach and house batteries have totally run down so I am unable to start the engine. Is there a way to leave the engine batteries alone so I can always start?

__________________
rwilson is offline   Reply With Quote
Old 08-20-2020, 01:39 PM   #2
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 3,506
THOR #6411
Quote:
Originally Posted by rwilson View Post
I have mistakenly left power on and upon return both coach and house batteries have totally run down so I am unable to start the engine. Is there a way to leave the engine batteries alone so I can always start?
It would help to know the year and model of your coach. That said, most coaches have the chassis and house batteries separate. The batteries are only connected by the emergency start switch and or when charging. To discharge the chassis battery on a plant 750 coach you would have to leave items on in the front cap (map light, fans, mirror heat,etc). Discharging the house batteries would not normally effect the chassis battery. Both sets of batteries can be equipped with a manual battery disconnect.
__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 is offline   Reply With Quote
Old 08-20-2020, 02:05 PM   #3
Junior Member
 
Brand: Thor Motor Coach
Model: Hurricane
State: Kentucky
Posts: 8
THOR #19504
It’s a 2019 Thor Hurricane 34R. Nothing was left on other than power switch, I guess inverter too so I suspect refrig ran it down
__________________
rwilson is offline   Reply With Quote
Old 08-20-2020, 04:47 PM   #4
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 3,506
THOR #6411
Quote:
Originally Posted by rwilson View Post
Itís a 2019 Thor Hurricane 34R. Nothing was left on other than power switch, I guess inverter too so I suspect refrig ran it down
The inverter powering the frig will run the house batteries down (assuming two 100 amp-hr flooded batteries - 50% remain capacity) in about 18 hours. Flooded batteries loose capacity every year at a rate of 6% or so. None of this explains why the the chassis battery under the hood did not retain a charge. Typically a flooded chassis battery will go flat in about 4 weeks due to the draw the keep "alive circuits" in the engines computer and the cab radio. If you are going to store the coach for a month or more, it is recommended you install a manual battery cut-off switch. Basically, the coach's engine is meant to be exercised at least once a month along with the generator. The ideal situation is to leave the coach plugged into to a 15 amp or greater circuit. I am fortunate to have an assigned parking spot with a 50 amp pedestal, but the chassis battery and one house failed 3 years. Just to be safe, I replaced all three last year.
__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 is offline   Reply With Quote
Old 08-21-2020, 08:54 PM   #5
Senior Member
 
Brand: Thor Motor Coach
State: Missouri
Posts: 2,164
THOR #6903
Beau388 laid it our pretty well

The two batteries systems shouldn't have been connected as one or the other discharged so you have two things going on

I always disconnect the chassis batteries when storing but did have a disconnect switch already designed in. I added a disconnect for the Chassis battery bank for longer term storage.
__________________
lwmcguire is offline   Reply With Quote
Old 08-21-2020, 10:05 PM   #6
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,094
THOR #8860
To get things started: put some jumpers to the coach batteries, and get your generator started. That should charge the coach batteries (if the switch for the batteries has them connected)
Once they're taking a good charge: jump the chassis battery, and start the chassis engine.
__________________
Bob Denman is offline   Reply With Quote
Old 08-21-2020, 10:09 PM   #7
Senior Member
 
Brand: Thor Motor Coach
State: Missouri
Posts: 2,164
THOR #6903
Quote:
Originally Posted by Bob Denman View Post
To get things started: put some jumpers to the coach batteries, and get your generator started. That should charge the coach batteries (if the switch for the batteries has them connected)
Once they're taking a good charge: jump the chassis battery, and start the chassis engine.
Bob is right, and let the batteries charge up for 15 minutes or so before trying to start anything
__________________
lwmcguire is offline   Reply With Quote
Old 08-21-2020, 10:48 PM   #8
Site Team
 
EA37TS's Avatar
 
Brand: Entegra
Model: Accolade 37TS
State: South Carolina
Posts: 7,327
THOR #1469
Actually, when the house batteries are charged use the emergency start switch to start the engine.
__________________
EA37TS is offline   Reply With Quote
Old 08-21-2020, 10:53 PM   #9
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,094
THOR #8860
That'll work...
But since the jumper cables are already out
__________________
Bob Denman is offline   Reply With Quote
Old 08-22-2020, 12:10 AM   #10
Site Team
 
EA37TS's Avatar
 
Brand: Entegra
Model: Accolade 37TS
State: South Carolina
Posts: 7,327
THOR #1469
Quote:
Originally Posted by Bob Denman View Post
That'll work...
But since the jumper cables are already out
Class A chassis batteries arenít always easy to get to with cables.
__________________
EA37TS is offline   Reply With Quote
Old 08-22-2020, 12:36 AM   #11
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,094
THOR #8860
How about a 1000 amp jump-starter powerpack?
I've got one from Rugged Geek, and it rocks the house!
__________________
Bob Denman is offline   Reply With Quote
Old 08-26-2020, 07:19 PM   #12
Senior Member
 
Brand: Thor Motor Coach
Model: 2016 A.C.E. 27.1
State: North Carolina
Posts: 118
THOR #17813
I would get a battery charger and charge the batteries with that. Charging a dead battery with the alternator is not a good idea. Also, would recommend getting a battery tester to make sure the batteries are still good, one with a load test.
__________________
Paul0138 is offline   Reply With Quote
Old 08-26-2020, 07:44 PM   #13
Senior Member
 
macdaddy1111's Avatar
 
Brand: Thor Motor Coach
Model: Hurricane 35m
State: North Carolina
Posts: 578
THOR #13505
Quote:
Originally Posted by rwilson View Post
Itís a 2019 Thor Hurricane 34R. Nothing was left on other than power switch, I guess inverter too so I suspect refrig ran it down
And that is why I have couple panels! Last thor without panels, I would forget to turn everything off and puff, I be dead! ha!
__________________
Retired Squid who has a retired squid that drives him around in a RV!
macdaddy1111 is offline   Reply With Quote
Old 08-26-2020, 09:01 PM   #14
Member
 
Brand: Thor Motor Coach
Model: Palazzo 36.1
State: Texas
Posts: 73
THOR #3182
Quote:
Originally Posted by macdaddy1111 View Post
And that is why I have couple panels! Last thor without panels, I would forget to turn everything off and puff, I be dead! ha!
Same here. I don't have enough panels to do much but they do keep the batteries charged when it's parked.

Since switching the coach batteries to lithium I don't have to worry as much about the phantom loss like lead acids but the panels are still nice for the truck batteries.
__________________
howzball is offline   Reply With Quote
Old 08-26-2020, 09:26 PM   #15
Member
 
SuperBoar's Avatar
 
Brand: Thor Motor Coach
Model: Vegas 24.1
State: Florida
Posts: 57
THOR #7188
Emergency start switch

Everybody has different systems, but on my 2017 Vegas 24.1, the emergency start switch must be held down for several minutes so the coach batteries can quick charge the chassis battery. You'd think it was just a relay to "shunt" all the batteries together, but my dealer says otherwise. If your chassis battery is close to three years old and you don't run your engine every month or so, it will go bad and you just have to jump it off which is way tedious because the battery is so inaccessible, then install a new battery.
There has been a lot of discussion about how the systems that charge the house batteries also charge the chassis battery. Not true for my rig. Plugging into shore power does not keep the chassis battery topped off - again, that's the way mine is wired. Some keep trickle chargers on the chassis battery.
__________________
SuperBoar is offline   Reply With Quote
Old 08-26-2020, 09:30 PM   #16
Junior Member
 
Brand: Thor Motor Coach
State: North Carolina
Posts: 28
THOR #19843
Quote:
Originally Posted by EA37TS View Post
Class A chassis batteries arenít always easy to get to with cables.
I find the positive terminal is not too hard to get to. the neg one is a b----. I took a wire like you use to connect batteries together (ie golf cart). Removed one of the frame bolts near the battery, twisted it together so both ends go under the frame bolt. skinned the wire in the middle. This serves as my ground (negative ) terminal.
__________________
exit55 is offline   Reply With Quote
Old 08-27-2020, 03:22 PM   #17
Member
 
Brand: Thor Motor Coach
Model: Palazzo 36.1
State: Texas
Posts: 73
THOR #3182
Quote:
Originally Posted by SuperBoar View Post
There has been a lot of discussion about how the systems that charge the house batteries also charge the chassis battery. Not true for my rig. Plugging into shore power does not keep the chassis battery topped off - again, that's the way mine is wired. Some keep trickle chargers on the chassis battery.
Is that true of all of the Vegas models? I would have assumed they were like any other class A coach and anytime you're plugged into shore power the system keeps all of the batteries charged unless maybe you're turning off a disconnect switch?
The (BiRD) relay connects to the button that helps you jump start your truck batteries, it should also keep both sets of batteries charged while on shore power.

When my BiRD switch's trombetta relay failed it caused my truck batteries to not charge, it was stuck only charging the coach side batteries.

Someone who owns a Vegas model probably know more about it but, I think your truck battery is supposed to charge on shore power.
__________________
howzball is offline   Reply With Quote
Old 08-27-2020, 03:28 PM   #18
Senior Member
 
Model: 25.2 Axis
State: Arizona
Posts: 800
THOR #3471
Quote:
Originally Posted by howzball View Post
Is that true of all of the Vegas models? I would have assumed they were like any other class A coach and anytime you're plugged into shore power the system keeps all of the batteries charged unless maybe you're turning off a disconnect switch?

The (BiRD) relay connects to the button that helps you jump start your truck batteries, it should also keep both sets of batteries charged while on shore power.



When my BiRD switch's trombetta relay failed it caused my truck batteries to not charge, it was stuck only charging the coach side batteries.



Someone who owns a Vegas model probably know more about it but, I think your truck battery is supposed to charge on shore power.


Yes mine is like that 2016 axis
__________________
Hugh.vines@att.net is offline   Reply With Quote
Old 08-27-2020, 04:30 PM   #19
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 3,506
THOR #6411
Quote:
Originally Posted by SuperBoar View Post
Everybody has different systems, but on my 2017 Vegas 24.1, the emergency start switch must be held down for several minutes so the coach batteries can quick charge the chassis battery.
True The emergency start switch simply uses the house battery charging system (coach's alternator and chassis) to connect the connect the house and chassis batteries even if the engine is not running. So if the house batteries are low and the generator cranks slow, using the emergency start usually will supply enough current to start the generator. The converse is also true. The reason to hold the switch down is the capacity of the Trombetta relay or the BIC. The Trombetta can handle about 100 amps and the BIC about 60 amps continuous. The generator's starter need s 60 amps and the V-10's starter needs 400 amps, so it takes a while to move those amps from one place to another. Good jumper cables will move about 400 amps.
__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 is offline   Reply With Quote
Old 08-27-2020, 04:34 PM   #20
Site Team
 
16ACE27's Avatar
 
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 9,799
THOR #7035
Quote:
Originally Posted by SuperBoar View Post
There has been a lot of discussion about how the systems that charge the house batteries also charge the chassis battery. Not true for my rig. Plugging into shore power does not keep the chassis battery topped off - again, that's the way mine is wired. Some keep trickle chargers on the chassis battery.
Then you have a problem with your coach. All Axis/Vegas models have BIRDS/BIMS to connect the two battery systems when charging and disconnect them when not. It is not uncommon to find that they were wired incorrectly from the factory.
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad
16ACE27 is online now   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 01:55 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2