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Old 07-10-2019, 06:23 PM   #1
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Brand: Thor Motor Coach
Model: Vegas 25.2
State: Virginia
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THOR #9505
Battery Issues

Fellow RVís, I have an electrical issue that I need advice on. (2018 Thor Vegas)
My batteries do not charge to 12 volts on shore power. When I disconnected the shore power they were at 10.88 and 10.93. On Generator they charge to 12 volts but quickly go down to between 10-11. To start the generator I had to run the chassis engine for a few minutes. Any advice is appreciated.
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Old 07-10-2019, 06:40 PM   #2
gmc
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Brand: Thor Motor Coach
Model: Hurricane 32A
State: Florida
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THOR #2829
Quote:
Originally Posted by Sparky View Post
Fellow RVís, I have an electrical issue that I need advice on. (2018 Thor Vegas)
My batteries do not charge to 12 volts on shore power. When I disconnected the shore power they were at 10.88 and 10.93. On Generator they charge to 12 volts but quickly go down to between 10-11. To start the generator I had to run the chassis engine for a few minutes. Any advice is appreciated.
Should be no difference between charging on shore power or generator - both power the on board converter which does the actual charging...
Sounds like an issue with the converter (not entering bulk charge mode perhaps) - or bad batteries.


What is the voltage reading while charging? It should be over 13v from the converter. (Insure use/store is in USE).
Try charging the batteries with an external charger - and see if they take/hold charge.
One of those two should show something interesting...
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Old 07-10-2019, 06:53 PM   #3
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Brand: Thor Motor Coach
Model: 2016 Axis 24.1
State: Florida
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Hello Sparky.

First thing to check is If you had the Use/store in the Use mode. The batteries will not charge on shore power or generator if the Axis is in store mode.

For a detailed discussion of charging issues in the Axis/Vegas see this thread.

What Charges the House & Chassis Batteries When
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Old 07-11-2019, 05:16 AM   #4
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Brand: Thor Motor Coach
Model: Vegas Windsport Chateau C
State: Texas
Posts: 9
THOR #14643
Not charging

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I fixed a similar problem I was getting 13.6 from the converter but not to the batteries

After checking the relay and fuse (1 and 4) I checked the solenoid (2) seemed to be the problem and I just connected the wires to another one to find out. Removed the old one and securing the new one

Two other times it was a fuse in the panel Not one in the long row of fuses, one of the two fuses beside the row.
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