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07-23-2017, 11:36 PM
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#1
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Junior Member
Brand: Thor Motor Coach
Model: ACE
State: Nevada
Posts: 10
THOR #4737
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Dead House Battery-ACE
When I left the RV Park this morning after 2.5 weeks, the MH wouldn't start, so I called AAA and got jumped. That taught me that even though the key is out there's still a drain on the battery if anything on the dash is left in the on position (A/C). It did work to jump and I drove about 5 hours never shutting it off. BUT, it seems that the house battery is dead and the usual driving did not charge it. My question is: where is the best place to buy a new house battery. Does it have to be a RV Service place? BTW, with the generator running, I seem to have power, but gone once I turn the generator off.
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07-24-2017, 12:01 AM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: 2017 Windsport 29M
State: Indiana
Posts: 3,692
THOR #5196
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Sounds like a bad battery. I would replace it with a deep cycle marine battery which is available at most auto parts stores. Make sure you get the same group size so you won't have fitment problems.
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07-24-2017, 12:08 AM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 796
THOR #4488
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SuperD...are you saying to replace the start battery with a Deep Cycle? I thought your Deep Cycle batteries were used for house only.
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07-24-2017, 12:11 AM
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#4
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,359
THOR #7035
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Or make sure your store/use switch is in "USE" with the engine running, and check the multitude of DC breakers that can disconnect the batteries from the charging/load buss.
Don't "assume" anything is bad (it may well be).
Logically troubleshoot the issue and save yourself some $$$$$.
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07-24-2017, 12:13 AM
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#5
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,359
THOR #7035
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Quote:
Originally Posted by Miramar Owner
SuperD...are you saying to replace the start battery with a Deep Cycle? I thought your Deep Cycle batteries were used for house only.
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Other than the jump start I thought we were talking about house batteries, as I'm sure SuperD was as well. After the 5 hour drive does your coach start again?
BTW, the A/C left on will not drain the chassis battery; has to be something else. With Thor, you never know what they have powered from the chassis battery that doesn't go through the ignition switch.
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07-24-2017, 12:20 AM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: 2017 Windsport 29M
State: Indiana
Posts: 3,692
THOR #5196
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Quote:
Originally Posted by Miramar Owner
SuperD...are you saying to replace the start battery with a Deep Cycle? I thought your Deep Cycle batteries were used for house only.
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No, I was referring the dead house battery.
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07-24-2017, 12:43 AM
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#7
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Junior Member
Brand: Thor Motor Coach
Model: ACE
State: Nevada
Posts: 10
THOR #4737
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Thanks! Rig did start up. I made sure the store/use button was on use. I've had that happen before, didn't think to double check that. That may have been it! Thanks so much!
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07-24-2017, 01:28 AM
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#8
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Senior Member
Brand: Thor Motor Coach
State: North Carolina
Posts: 360
THOR #3952
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I have to say I'm a little confused. Jump starting is the chassis battery. If the house battery was dead, the generator would not start. Does your Ace have an emergency start switch that combines the house and chassis bateteries for starting? I highly recommend 2 house batteries with a switch like we use on boats. You can have the switch on, off, battery 1, battery 2, or both. Very easy to hook up.
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Ace 30.1
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07-24-2017, 02:44 AM
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#9
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 796
THOR #4488
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Quote:
Originally Posted by Hittntherooad
I have to say I'm a little confused. Jump starting is the chassis battery. If the house battery was dead, the generator would not start. Does your Ace have an emergency start switch that combines the house and chassis bateteries for starting? I highly recommend 2 house batteries with a switch like we use on boats. You can have the switch on, off, battery 1, battery 2, or both. Very easy to hook up.
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Yeah... I was confused too. Sounds like the problem was solved though.
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07-24-2017, 05:42 AM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: ACE 27.1
State: Virginia
Posts: 315
THOR #7607
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The last place to buy a battery would be at an RV store. I bought the same exact battery that CW had "On Sale" for $139 at Tractor Supply for $79. And it had a sticker that said it was made just last month.
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ComputerChips
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07-24-2017, 03:05 PM
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#11
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Senior Member
Brand: Thor Motor Coach
Model: Vegas 24.1
State: North Carolina
Posts: 184
THOR #6877
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house battery
Another subtlety is that the Use/Store relay wont reset to USE if the battery output has fallen below 2V....you have to charge the batteries directly until you get them back above the level or get the house load reconnected before the relay will reset.
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07-29-2017, 01:30 AM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 35C
State: Maryland
Posts: 252
THOR #3227
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Another good source for the chassis and house battery is Walmart. I am in the automotive business. Walmart batteries are manufactured by a reputable company. The MAXX grade has a 3 year FREE replacement then 2 year prorated. Mine always seem to go bad in less than the 3 year FREE replacement period. Humm!!!
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Jim K - Avenue, Maryland
2016 Thor Hurricane 35C
2015 Ford F-150 King Ranch
2013 Chrysler 300 "S", 1936 Chrysler C-8
2012 Jeep Liberty Limited Edition
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05-14-2018, 12:54 AM
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#13
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Junior Member
Brand: Thor Motor Coach
State: South Carolina
Posts: 3
THOR #11622
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Where is the chassis battery to jump start the vehicle? I've had it in storage and everything is dead. I could not unlock the front panel with the round keys they gave us. Is that where the battery is located? It's a 2016 ACE 29.4.
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05-14-2018, 01:59 AM
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#14
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Senior Member
Brand: Thor Motor Coach
Model: 2017 Windsport 29M
State: Indiana
Posts: 3,692
THOR #5196
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You should have a switch on the dash labeled “Emergency Start”, this ties the chassis batteries to the engine battery. Hopefully your chassis batteries are charged.
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05-14-2018, 02:46 PM
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#15
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Junior Member
Brand: Thor Motor Coach
State: South Carolina
Posts: 3
THOR #11622
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Quote:
Originally Posted by SuperD
You should have a switch on the dash labeled “Emergency Start”, this ties the chassis batteries to the engine battery. Hopefully your chassis batteries are charged.
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I tried that; however the chassis batteries must be dead also. My next plan is to ride over to Camping World (4 miles) and have them show me where the battery is located. Thanks
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05-14-2018, 10:29 PM
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#16
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Senior Member
Brand: Thor Motor Coach
Model: 2017 Windsport 29M
State: Indiana
Posts: 3,692
THOR #5196
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One more thing to try, if you can, plug the coach in and allow the batteries to charge. Make sure the use/store switch is in the use position.
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05-14-2018, 10:34 PM
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#17
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Quote:
Originally Posted by jgweaving
I tried that; however the chassis batteries must be dead also. My next plan is to ride over to Camping World (4 miles) and have them show me where the battery is located. Thanks
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oood luck!
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"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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05-15-2018, 08:17 AM
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#18
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Senior Member
Brand: Thor Motor Coach
State: Georgia
Posts: 155
THOR #9957
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My house battery that came on my Thor Class C, died on 5/7/18. Checked voltage and 12v. Checked next day: 11.66v. It was group 27. Bought RV on 5/20/17. Bought a new AGM Deep Cycle RV Battery 92AH on 5/8/18. Great Battery. 4 year full replacement. An XR2 Battery.
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