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Old 10-06-2018, 12:24 AM   #1
Junior Member
 
Brand: Thor Motor Coach
Model: ACE 30.3
State: Washington
Posts: 18
THOR #10467
Charging both coach batteries at the same time?

In a 2017 Thor ACE, is there any way I can hook up both coach batteries to one trickle charger for long term storage over the winter? I'm not sure if my batteries are in series or in parallel.Perhaps someone can answer that as well.
Lastly, is it necessary to also trickle charge the chassis battery?
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Old 10-06-2018, 12:58 AM   #2
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Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 1,690
THOR #6411
Your coach's converter is a three stage converter. With the USE/STORE in the USE position when plugged into shore power, will keep the house and chassis batteries fully charged using the same floating charge profile of any battery maintainer.
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Old 10-06-2018, 01:00 AM   #3
Senior Member
 
Brand: Thor Motor Coach
Model: Palazzo 33.2
State: California
Posts: 247
THOR #12839
The ACE comes with two 12 volt House batteries wired in parallel. I like the Batteryminder charger that also has a desulfate cycle to keep the batteries in top and long performance.
You will probably need a separate charger for the Chassis battery because there is an isolator between the House and Chassis batteries to protect the separate systems. The emergency start button on your dash energizes the isolator to allow the Chassis to pull from the House.
The above assumes you want to leave it unplugged from shore power with the switch in Store, and only want to maintain batteries but as the previous post suggests it would be easier to get an adapter and just leave the coach plugged in and let the factory inverter/charger take care of everything
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Old 10-06-2018, 03:09 AM   #4
Junior Member
 
Brand: Thor Motor Coach
Model: ACE 30.3
State: Washington
Posts: 18
THOR #10467
I thought I remember reading that it was not advisable to use the coach's converter for long term storing in that it would cause the batteries to sulfate. If I'm mistaken, that would certainly be far easier than hooking up a stand alone battery maintainer/charger. Maybe the newer motor homes have a more advanced charging system perhaps?
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