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Old 02-21-2019, 11:47 PM   #1
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Brand: Thor Motor Coach
Model: Four Winds 31E (2019)
State: California
Posts: 240
THOR #12270
31E not charging chassis by design? thoughts?

i have a 31E and the chassis does not charge via shore or generator power (by design from thor.) im just curious why thor would design it like that. for what reason?

i am thinking of changing out the isolator for one like in a type A or geting a DC battery charger like this to maintain the chassis battery.
Battery Chargers | Auxiliary Battery Charger | Xantrex
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Old 02-22-2019, 12:42 AM   #2
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 2,964
THOR #7035
Battery maintainer via 12V socket
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Old 02-22-2019, 01:26 PM   #3
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Brand: Thor Motor Coach
State: Missouri
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THOR #6903
Find your solenoid that connects the battery banks, check voltage on control wires and you will know

Use a similar maintainer on some toys and it works well, best to start with fully charged batteries
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Old 02-22-2019, 08:57 PM   #4
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Brand: Thor Motor Coach
Model: Four Winds 31E (2019)
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THOR #12270
i saw that thread and replyed to it. i started this thread to see why thor would design it like that. like is there some saftey thing im missing?
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Old 02-22-2019, 10:22 PM   #5
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Brand: Thor Motor Coach
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Originally Posted by Diemaster View Post
i saw that thread and replyed to it. i started this thread to see why thor would design it like that. like is there some saftey thing im missing?
There are many coaches that do connect and others that don't. Have no idea why the difference.

If anything probably just to save money on the solenoid and bird unit.
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Old 02-22-2019, 11:57 PM   #6
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Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 1,506
THOR #6411
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Originally Posted by Diemaster View Post
i have a 31E and the chassis does not charge via shore or generator power (by design from thor.) im just curious why thor would design it like that. for what reason?

i am thinking of changing out the isolator for one like in a type A or geting a DC battery charger like this to maintain the chassis battery.
Battery Chargers | Auxiliary Battery Charger | Xantrex
Look at your 120 volt circuit breaker panel. If you see a 15 amp circuit breaker labeled "charger", then the charger should charge the house batteries. If you have an emergency start switch, then your charger should also charge your chassis battery (Mercedes chassis RV excepted).
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